/******************************************************************************
 *
 * Project:  Arrow generic code
 * Purpose:  Arrow generic code
 * Author:   Even Rouault, <even.rouault at spatialys.com>
 *
 ******************************************************************************
 * Copyright (c) 2022, Planet Labs
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 ****************************************************************************/

#include "ogr_arrow.h"

#include "cpl_json.h"
#include "cpl_time.h"
#include "ogr_p.h"
#include "ogr_swq.h"

#include <cinttypes>

#define SWQ_ISNOTNULL (-SWQ_ISNULL)

/************************************************************************/
/*                         OGRArrowLayer()                              */
/************************************************************************/

inline
OGRArrowLayer::OGRArrowLayer(OGRArrowDataset* poDS, const char* pszLayerName):
            m_poMemoryPool(poDS->GetMemoryPool())
{
    m_poFeatureDefn = new OGRFeatureDefn(pszLayerName);
    m_poFeatureDefn->SetGeomType(wkbNone);
    m_poFeatureDefn->Reference();
    SetDescription(pszLayerName);
}

/************************************************************************/
/*                        ~OGRFeatherLayer()                            */
/************************************************************************/

inline OGRArrowLayer::~OGRArrowLayer()
{
    CPLDebug("ARROW", "Memory pool: bytes_allocated = %" PRId64,
             m_poMemoryPool->bytes_allocated());
    CPLDebug("ARROW", "Memory pool: max_memory = %" PRId64,
             m_poMemoryPool->max_memory());
    m_poFeatureDefn->Release();
}

/************************************************************************/
/*                         LoadGDALMetadata()                           */
/************************************************************************/

inline
std::map<std::string, std::unique_ptr<OGRFieldDefn>> OGRArrowLayer::LoadGDALMetadata(const arrow::KeyValueMetadata* kv_metadata)
{
    std::map<std::string, std::unique_ptr<OGRFieldDefn>> oMapFieldNameToGDALSchemaFieldDefn;
    if( kv_metadata && kv_metadata->Contains("gdal:schema") &&
        CPLTestBool(CPLGetConfigOption(("OGR_" + GetDriverUCName() + "_READ_GDAL_SCHEMA").c_str(), "YES")) )
    {
        auto gdalSchema = kv_metadata->Get("gdal:schema");
        if( gdalSchema.ok() )
        {
            CPLDebug(GetDriverUCName().c_str(), "gdal:schema = %s", gdalSchema->c_str());
            CPLJSONDocument oDoc;
            if( oDoc.LoadMemory(*gdalSchema) )
            {
                auto oRoot = oDoc.GetRoot();

                m_osFIDColumn = oRoot.GetString("fid");

                auto oColumns = oRoot.GetObj("columns");
                if( oColumns.IsValid() )
                {
                    for( const auto oColumn: oColumns.GetChildren() )
                    {
                        const auto osName = oColumn.GetName();
                        const auto osType = oColumn.GetString("type");
                        const auto osSubType = oColumn.GetString("subtype");
                        auto poFieldDefn = cpl::make_unique<OGRFieldDefn>(osName.c_str(), OFTString);
                        for( int iType = 0; iType <= static_cast<int>(OFTMaxType); iType++ )
                        {
                            if( EQUAL(osType.c_str(), OGRFieldDefn::GetFieldTypeName(
                                                  static_cast<OGRFieldType>(iType))) )
                            {
                                poFieldDefn->SetType(static_cast<OGRFieldType>(iType));
                                break;
                            }
                        }
                        if( !osSubType.empty() )
                        {
                            for( int iSubType = 0; iSubType <= static_cast<int>(OFSTMaxSubType); iSubType++ )
                            {
                                if( EQUAL(osSubType.c_str(),
                                          OGRFieldDefn::GetFieldSubTypeName(
                                              static_cast<OGRFieldSubType>(iSubType))) )
                                {
                                    poFieldDefn->SetSubType(static_cast<OGRFieldSubType>(iSubType));
                                    break;
                                }
                            }
                        }
                        poFieldDefn->SetWidth(oColumn.GetInteger("width"));
                        poFieldDefn->SetPrecision(oColumn.GetInteger("precision"));
                        oMapFieldNameToGDALSchemaFieldDefn[osName] = std::move(poFieldDefn);

                    }
                }
            }
        }
    }
    return oMapFieldNameToGDALSchemaFieldDefn;
}


/************************************************************************/
/*                        IsIntegerArrowType()                          */
/************************************************************************/

inline bool OGRArrowLayer::IsIntegerArrowType(arrow::Type::type typeId)
{
    return typeId == arrow::Type::INT8 ||
           typeId == arrow::Type::UINT8 ||
           typeId == arrow::Type::INT16 ||
           typeId == arrow::Type::UINT16 ||
           typeId == arrow::Type::INT32 ||
           typeId == arrow::Type::UINT32 ||
           typeId == arrow::Type::INT64 ||
           typeId == arrow::Type::UINT64;
}

/************************************************************************/
/*                        MapArrowTypeToOGR()                           */
/************************************************************************/

inline bool OGRArrowLayer::MapArrowTypeToOGR(const std::shared_ptr<arrow::DataType>& type,
                                             const std::shared_ptr<arrow::Field>& field,
                                             OGRFieldDefn& oField,
                                             OGRFieldType& eType,
                                             OGRFieldSubType& eSubType,
                                             const std::vector<int>& path,
                                             const std::map<std::string, std::unique_ptr<OGRFieldDefn>>& oMapFieldNameToGDALSchemaFieldDefn)
{
    bool bTypeOK = true;
    switch( type->id() )
    {
        case arrow::Type::NA:
            break;

        case arrow::Type::BOOL:
            eType = OFTInteger;
            eSubType = OFSTBoolean;
            break;
        case arrow::Type::UINT8:
        case arrow::Type::INT8:
        case arrow::Type::UINT16:
            eType = OFTInteger;
            break;
        case arrow::Type::INT16:
            eType = OFTInteger;
            eSubType = OFSTInt16;
            break;
        case arrow::Type::UINT32:
            eType = OFTInteger64;
            break;
        case arrow::Type::INT32:
            eType = OFTInteger;
            break;
        case arrow::Type::UINT64:
            eType = OFTReal; // potential loss
            break;
        case arrow::Type::INT64:
            eType = OFTInteger64;
            break;
        case arrow::Type::HALF_FLOAT: // should use OFSTFloat16 if we had it
        case arrow::Type::FLOAT:
            eType = OFTReal;
            eSubType = OFSTFloat32;
            break;
        case arrow::Type::DOUBLE:
            eType = OFTReal;
            break;
        case arrow::Type::STRING:
        case arrow::Type::LARGE_STRING:
            eType = OFTString;
            break;
        case arrow::Type::BINARY:
        case arrow::Type::LARGE_BINARY:
            eType = OFTBinary;
            break;
        case arrow::Type::FIXED_SIZE_BINARY:
            eType = OFTBinary;
            oField.SetWidth(
                std::static_pointer_cast<arrow::FixedSizeBinaryType>(type)->byte_width());
            break;

        case arrow::Type::DATE32:
        case arrow::Type::DATE64:
            eType = OFTDate;
            break;

        case arrow::Type::TIMESTAMP:
            eType = OFTDateTime;
            break;

        case arrow::Type::TIME32:
            eType = OFTTime;
            break;

        case arrow::Type::TIME64:
            eType = OFTInteger64; // our OFTTime doesn't have micro or nanosecond accuracy
            break;

        case arrow::Type::DECIMAL128:
        case arrow::Type::DECIMAL256:
        {
            const auto decimalType = std::static_pointer_cast<arrow::DecimalType>(type);
            eType = OFTReal;
            oField.SetWidth(decimalType->precision());
            oField.SetPrecision(decimalType->scale());
            break;
        }

        case arrow::Type::LIST:
        case arrow::Type::FIXED_SIZE_LIST:
        {
            auto listType = std::static_pointer_cast<arrow::BaseListType>(type);
            switch( listType->value_type()->id() )
            {
                case arrow::Type::BOOL:
                    eType = OFTIntegerList;
                    eSubType = OFSTBoolean;
                    break;
                case arrow::Type::UINT8:
                case arrow::Type::INT8:
                case arrow::Type::UINT16:
                case arrow::Type::INT16:
                case arrow::Type::INT32:
                    eType = OFTIntegerList;
                    break;
                case arrow::Type::UINT32:
                    eType = OFTInteger64List;
                    break;
                case arrow::Type::UINT64:
                    eType = OFTRealList; // potential loss
                    break;
                case arrow::Type::INT64:
                    eType = OFTInteger64List;
                    break;
                case arrow::Type::HALF_FLOAT: // should use OFSTFloat16 if we had it
                case arrow::Type::FLOAT:
                    eType = OFTRealList;
                    eSubType = OFSTFloat32;
                    break;
                case arrow::Type::DOUBLE:
                    eType = OFTRealList;
                    break;
                case arrow::Type::STRING:
                    eType = OFTStringList;
                    break;
                default:
                    bTypeOK = false;
                    CPLError(CE_Warning, CPLE_AppDefined,
                             "Field %s of unhandled type %s ignored",
                             field->name().c_str(),
                             type->ToString().c_str());
                    break;
            }
            break;
        }

        case arrow::Type::MAP:
        {
            auto mapType = std::static_pointer_cast<arrow::MapType>(type);
            const auto itemTypeId = mapType->item_type()->id();
            if( mapType->key_type()->id() == arrow::Type::STRING &&
                (itemTypeId == arrow::Type::BOOL ||
                 IsIntegerArrowType(itemTypeId) ||
                 itemTypeId == arrow::Type::HALF_FLOAT ||
                 itemTypeId == arrow::Type::FLOAT ||
                 itemTypeId == arrow::Type::DOUBLE ||
                 itemTypeId == arrow::Type::STRING) )
            {
                eType = OFTString;
                eSubType = OFSTJSON;
            }
            else
            {
                bTypeOK = false;
                CPLError(CE_Warning, CPLE_AppDefined,
                         "Field %s of unhandled type %s ignored",
                         field->name().c_str(),
                         type->ToString().c_str());
            }
            break;
        }

        case arrow::Type::STRUCT:
            // should be handled by specialized code
            CPLAssert(false);
            break;

        // unhandled types

        case arrow::Type::INTERVAL_MONTHS:
        case arrow::Type::INTERVAL_DAY_TIME:
        case arrow::Type::SPARSE_UNION:
        case arrow::Type::DENSE_UNION:
        case arrow::Type::DICTIONARY:
        case arrow::Type::EXTENSION:
        case arrow::Type::DURATION:
        case arrow::Type::LARGE_LIST:
        case arrow::Type::INTERVAL_MONTH_DAY_NANO:
        case arrow::Type::MAX_ID:
        {
            bTypeOK = false;
            CPLError(CE_Warning, CPLE_AppDefined,
                     "Field %s of unhandled type %s ignored",
                     field->name().c_str(),
                     type->ToString().c_str());
            break;
        }
    }

    if( bTypeOK )
    {
        const auto oIter = oMapFieldNameToGDALSchemaFieldDefn.find(field->name());
        oField.SetType(eType);
        if( oIter != oMapFieldNameToGDALSchemaFieldDefn.end() )
        {
            const auto& poGDALFieldDefn = oIter->second;
            if( poGDALFieldDefn->GetType() == eType )
            {
                if( eSubType == OFSTNone )
                {
                    eSubType = poGDALFieldDefn->GetSubType();
                }
                else if( eSubType != poGDALFieldDefn->GetSubType() )
                {
                    CPLDebug(GetDriverUCName().c_str(),
                             "Field subtype inferred from Parquet/Arrow schema is %s, "
                             "whereas the one in gdal:schema is %s. "
                             "Using the former one.",
                             OGR_GetFieldSubTypeName(eSubType),
                             OGR_GetFieldSubTypeName(poGDALFieldDefn->GetSubType()));
                }
            }
            else
            {
                CPLDebug(GetDriverUCName().c_str(),
                         "Field type inferred from Parquet/Arrow schema is %s, "
                         "whereas the one in gdal:schema is %s. "
                         "Using the former one.",
                         OGR_GetFieldTypeName(eType),
                         OGR_GetFieldTypeName(poGDALFieldDefn->GetType()));
            }
            if( poGDALFieldDefn->GetWidth() > 0 )
                oField.SetWidth(poGDALFieldDefn->GetWidth());
            if( poGDALFieldDefn->GetPrecision() > 0 )
                oField.SetPrecision(poGDALFieldDefn->GetPrecision());
        }
        oField.SetSubType(eSubType);
        oField.SetNullable(field->nullable());
        m_poFeatureDefn->AddFieldDefn(&oField);
        m_anMapFieldIndexToArrowColumn.push_back(path);
    }

    return bTypeOK;
}

/************************************************************************/
/*                       BuildDomainFromBatch()                         */
/************************************************************************/

inline std::unique_ptr<OGRFieldDomain> OGRArrowLayer::BuildDomainFromBatch(
                    const std::string& osDomainName,
                    const std::shared_ptr<arrow::RecordBatch>& poBatch,
                    int iCol) const
{
    const auto array = poBatch->column(iCol);
    auto castArray = std::static_pointer_cast<arrow::DictionaryArray>(array);
    auto dict = castArray->dictionary();
    CPLAssert(dict->type_id() == arrow::Type::STRING );
    OGRFieldType eType = OFTInteger;
    const auto indexTypeId = castArray->dict_type()->index_type()->id();
    if( indexTypeId == arrow::Type::UINT32 ||
        indexTypeId == arrow::Type::UINT64 ||
        indexTypeId == arrow::Type::INT64 )
        eType = OFTInteger64;
    auto values = std::static_pointer_cast<arrow::StringArray>(dict);
    std::vector<OGRCodedValue> asValues;
    asValues.reserve(values->length());
    for( int i = 0; i < values->length(); ++i )
    {
        if( !values->IsNull(i) )
        {
            OGRCodedValue val;
            val.pszCode = CPLStrdup(CPLSPrintf("%d", i));
            val.pszValue = CPLStrdup(values->GetString(i).c_str());
            asValues.emplace_back(val);
        }
    }
    return cpl::make_unique<OGRCodedFieldDomain>(
        osDomainName, std::string(),
        eType, OFSTNone, std::move(asValues));
}

/************************************************************************/
/*               ComputeGeometryColumnTypeProcessBatch()                */
/************************************************************************/

inline
OGRwkbGeometryType OGRArrowLayer::ComputeGeometryColumnTypeProcessBatch(
    const std::shared_ptr<arrow::RecordBatch>& poBatch,
    int iGeomCol, int iBatchCol,
    OGRwkbGeometryType eGeomType) const
{
    const auto array = poBatch->column(iBatchCol);
    const auto castBinaryArray =
        ( m_aeGeomEncoding[iGeomCol] == OGRArrowGeomEncoding::WKB ) ?
            std::static_pointer_cast<arrow::BinaryArray>(array) : nullptr;
    const auto castStringArray =
        ( m_aeGeomEncoding[iGeomCol] == OGRArrowGeomEncoding::WKT ) ?
            std::static_pointer_cast<arrow::StringArray>(array) : nullptr;
    for( int64_t i = 0; i < poBatch->num_rows(); i++ )
    {
        if( !array->IsNull(i) )
        {
            OGRwkbGeometryType eThisGeomType = wkbNone;
            if( m_aeGeomEncoding[iGeomCol] == OGRArrowGeomEncoding::WKB && castBinaryArray )
            {
                arrow::BinaryArray::offset_type out_length = 0;
                const uint8_t* data = castBinaryArray->GetValue(i, &out_length);
                if( out_length >= 5 )
                {
                    OGRReadWKBGeometryType(data, wkbVariantIso, &eThisGeomType);
                }
            }
            else if ( m_aeGeomEncoding[iGeomCol] == OGRArrowGeomEncoding::WKT &&
                      castStringArray )
            {
                const auto osWKT = castStringArray->GetString(i);
                if( !osWKT.empty() )
                {
                    OGRReadWKTGeometryType(osWKT.c_str(), &eThisGeomType);
                }
            }

            if( eThisGeomType != wkbNone )
            {
                if( eGeomType == wkbNone )
                    eGeomType = eThisGeomType;
                else if( wkbFlatten(eThisGeomType) == wkbFlatten(eGeomType) )
                    ;
                else if( wkbFlatten(eThisGeomType) == wkbMultiLineString &&
                         wkbFlatten(eGeomType) == wkbLineString )
                {
                    eGeomType = OGR_GT_SetModifier(wkbMultiLineString,
                       OGR_GT_HasZ(eThisGeomType) || OGR_GT_HasZ(eGeomType),
                       OGR_GT_HasM(eThisGeomType) || OGR_GT_HasM(eGeomType));
                }
                else if( wkbFlatten(eThisGeomType) == wkbLineString &&
                         wkbFlatten(eGeomType) == wkbMultiLineString )
                    ;
                else if( wkbFlatten(eThisGeomType) == wkbMultiPolygon &&
                         wkbFlatten(eGeomType) == wkbPolygon )
                {
                    eGeomType = OGR_GT_SetModifier(wkbMultiPolygon,
                       OGR_GT_HasZ(eThisGeomType) || OGR_GT_HasZ(eGeomType),
                       OGR_GT_HasM(eThisGeomType) || OGR_GT_HasM(eGeomType));
                }
                else if( wkbFlatten(eThisGeomType) == wkbPolygon &&
                         wkbFlatten(eGeomType) == wkbMultiPolygon )
                    ;
                else
                    return wkbUnknown;

                eGeomType = OGR_GT_SetModifier(eGeomType,
                   OGR_GT_HasZ(eThisGeomType) || OGR_GT_HasZ(eGeomType),
                   OGR_GT_HasM(eThisGeomType) || OGR_GT_HasM(eGeomType));
            }
        }
    }
    return eGeomType;
}

/************************************************************************/
/*                           IsPointType()                              */
/************************************************************************/

static bool IsPointType(const std::shared_ptr<arrow::DataType>& type,
                        bool& bHasZOut,
                        bool& bHasMOut)
{
    if( type->id() != arrow::Type::FIXED_SIZE_LIST )
        return false;
    auto poListType = std::static_pointer_cast<arrow::FixedSizeListType>(type);
    const int nOutDimensionality = poListType->list_size();
    const auto osValueFieldName = poListType->value_field()->name();
    if( nOutDimensionality == 2 )
    {
        bHasZOut = false;
        bHasMOut = false;
    }
    else if( nOutDimensionality == 3 )
    {
        if( osValueFieldName == "xym" )
        {
            bHasZOut = false;
            bHasMOut = true;
        }
        else if( osValueFieldName == "xyz" )
        {
            bHasMOut = false;
            bHasZOut = true;
        }
    }
    else if( nOutDimensionality == 4 )
    {
        bHasMOut = true;
        bHasZOut = true;
    }
    else
    {
        return false;
    }
    return poListType->value_type()->id() == arrow::Type::DOUBLE;
}

/************************************************************************/
/*                         IsListOfPointType()                          */
/************************************************************************/

static bool IsListOfPointType(const std::shared_ptr<arrow::DataType>& type,
                              int nDepth,
                              bool& bHasZOut,
                              bool& bHasMOut)
{
    if( type->id() != arrow::Type::LIST )
        return false;
    auto poListType = std::static_pointer_cast<arrow::ListType>(type);
    return nDepth == 1 ?
        IsPointType(poListType->value_type(), bHasZOut, bHasMOut) :
        IsListOfPointType(poListType->value_type(), nDepth - 1, bHasZOut, bHasMOut);
}

/************************************************************************/
/*                        IsValidGeometryEncoding()                     */
/************************************************************************/

inline bool OGRArrowLayer::IsValidGeometryEncoding(const std::shared_ptr<arrow::Field>& field,
                                                   const std::string& osEncoding,
                                                   OGRwkbGeometryType& eGeomTypeOut,
                                                   OGRArrowGeomEncoding& eOGRArrowGeomEncodingOut)
{
    const auto& fieldName = field->name();
    std::shared_ptr<arrow::DataType> fieldType = field->type();
    auto fieldTypeId = fieldType->id();

    if( fieldTypeId == arrow::Type::EXTENSION )
    {
        auto extensionType = cpl::down_cast<arrow::ExtensionType*>(fieldType.get());
        fieldType = extensionType->storage_type();
        fieldTypeId = fieldType->id();
    }

    eGeomTypeOut = wkbUnknown;

    if( osEncoding == "WKT" )
    {
        if( fieldTypeId != arrow::Type::STRING )
        {
            CPLError(CE_Warning, CPLE_AppDefined,
                     "Geometry column %s has a non String type: %s. "
                     "Handling it as a regular field",
                     fieldName.c_str(),
                     fieldType->name().c_str());
            return false;
        }
        eOGRArrowGeomEncodingOut = OGRArrowGeomEncoding::WKT;
        return true;
    }

    if( osEncoding == "WKB" )
    {
        if( fieldTypeId != arrow::Type::BINARY )
        {
            CPLError(CE_Warning, CPLE_AppDefined,
                     "Geometry column %s has a non Binary type: %s. "
                     "Handling it as a regular field",
                     fieldName.c_str(),
                     fieldType->name().c_str());
            return false;
        }
        eOGRArrowGeomEncodingOut = OGRArrowGeomEncoding::WKB;
        return true;
    }

    bool bHasZ = false;
    bool bHasM = false;
    if( osEncoding == "geoarrow.point" )
    {
        if( !IsPointType(fieldType, bHasZ, bHasM) )
        {
            CPLError(CE_Warning, CPLE_AppDefined,
                     "Geometry column %s has a type != fixed_size_list<xy: double>[2]>: %s. "
                     "Handling it as a regular field",
                     fieldName.c_str(),
                     fieldType->name().c_str());
            return false;
        }
        eGeomTypeOut = OGR_GT_SetModifier(wkbPoint, static_cast<int>(bHasZ), static_cast<int>(bHasM));
        eOGRArrowGeomEncodingOut = OGRArrowGeomEncoding::GEOARROW_POINT;
        return true;
    }

    if( osEncoding == "geoarrow.linestring" )
    {
        if( !IsListOfPointType(fieldType, 1, bHasZ, bHasM) )
        {
            CPLError(CE_Warning, CPLE_AppDefined,
                     "Geometry column %s has a type != fixed_size_list<xy: double>[2]>: %s. "
                     "Handling it as a regular field",
                     fieldName.c_str(),
                     fieldType->name().c_str());
            return false;
        }
        eGeomTypeOut = OGR_GT_SetModifier(wkbLineString, static_cast<int>(bHasZ), static_cast<int>(bHasM));
        eOGRArrowGeomEncodingOut = OGRArrowGeomEncoding::GEOARROW_LINESTRING;
        return true;
    }

    if( osEncoding == "geoarrow.polygon" )
    {
        if( !IsListOfPointType(fieldType, 2, bHasZ, bHasM) )
        {
            CPLError(CE_Warning, CPLE_AppDefined,
                     "Geometry column %s has a type != list<vertices: fixed_size_list<xy: double>[2]>>: %s. "
                     "Handling it as a regular field",
                     fieldName.c_str(),
                     fieldType->name().c_str());
            return false;
        }
        eGeomTypeOut = OGR_GT_SetModifier(wkbPolygon, static_cast<int>(bHasZ), static_cast<int>(bHasM));
        eOGRArrowGeomEncodingOut = OGRArrowGeomEncoding::GEOARROW_POLYGON;
        return true;
    }

    if( osEncoding == "geoarrow.multipoint" )
    {
        if( !IsListOfPointType(fieldType, 1, bHasZ, bHasM) )
        {
            CPLError(CE_Warning, CPLE_AppDefined,
                     "Geometry column %s has a type != fixed_size_list<xy: double>[2]>: %s. "
                     "Handling it as a regular field",
                     fieldName.c_str(),
                     fieldType->name().c_str());
            return false;
        }
        eGeomTypeOut = OGR_GT_SetModifier(wkbMultiPoint, static_cast<int>(bHasZ), static_cast<int>(bHasM));
        eOGRArrowGeomEncodingOut = OGRArrowGeomEncoding::GEOARROW_MULTIPOINT;
        return true;
    }

    if( osEncoding == "geoarrow.multilinestring" )
    {
        if( !IsListOfPointType(fieldType, 2, bHasZ, bHasM) )
        {
            CPLError(CE_Warning, CPLE_AppDefined,
                     "Geometry column %s has a type != list<vertices: fixed_size_list<xy: double>[2]>>: %s. "
                     "Handling it as a regular field",
                     fieldName.c_str(),
                     fieldType->name().c_str());
            return false;
        }
        eGeomTypeOut = OGR_GT_SetModifier(wkbMultiLineString, static_cast<int>(bHasZ), static_cast<int>(bHasM));
        eOGRArrowGeomEncodingOut = OGRArrowGeomEncoding::GEOARROW_MULTILINESTRING;
        return true;
    }

    if( osEncoding == "geoarrow.multipolygon" )
    {
        if( !IsListOfPointType(fieldType, 3, bHasZ, bHasM) )
        {
            CPLError(CE_Warning, CPLE_AppDefined,
                     "Geometry column %s has a type != list<polygons: list<rings: list<vertices: fixed_size_list<xy: double>[2]>>>: %s. "
                     "Handling it as a regular field",
                     fieldName.c_str(),
                     fieldType->name().c_str());
            return false;
        }
        eGeomTypeOut = OGR_GT_SetModifier(wkbMultiPolygon, static_cast<int>(bHasZ), static_cast<int>(bHasM));
        eOGRArrowGeomEncodingOut = OGRArrowGeomEncoding::GEOARROW_MULTIPOLYGON;
        return true;
    }

    CPLError(CE_Warning, CPLE_AppDefined,
             "Geometry column %s uses a unhandled encoding: %s. "
             "Handling it as a regular field",
             fieldName.c_str(),
             osEncoding.c_str());
    return false;
}

/************************************************************************/
/*                    GetGeometryTypeFromString()                       */
/************************************************************************/

inline
OGRwkbGeometryType OGRArrowLayer::GetGeometryTypeFromString(const std::string& osType)
{
    OGRwkbGeometryType eGeomType = wkbUnknown;
    OGRReadWKTGeometryType(osType.c_str(), &eGeomType);
    if( eGeomType == wkbUnknown && !osType.empty() )
    {
        CPLDebug("ARROW", "Unknown geometry type: %s",
                 osType.c_str());
    }
    return eGeomType;
}

/************************************************************************/
/*                             ReadWKBUInt32()                          */
/************************************************************************/

inline uint32_t ReadWKBUInt32(const uint8_t* data,
                              OGRwkbByteOrder eByteOrder,
                              size_t& iOffset)
{
    uint32_t v;
    memcpy(&v, data + iOffset, sizeof(v));
    iOffset += sizeof(v);
    if( OGR_SWAP(eByteOrder))
    {
        CPL_SWAP32PTR(&v);
    }
    return v;
}

/************************************************************************/
/*                         ReadWKBPointSequence()                       */
/************************************************************************/

inline bool ReadWKBPointSequence(const uint8_t* data, size_t size,
                                 OGRwkbByteOrder eByteOrder,
                                 int nDim,
                                 size_t& iOffset, OGREnvelope& sEnvelope)
{
    const uint32_t nPoints = ReadWKBUInt32(data, eByteOrder, iOffset);
    if( nPoints > (size - iOffset) / (nDim * sizeof(double)) )
        return false;
    double dfX = 0;
    double dfY = 0;
    for( uint32_t j = 0; j < nPoints; j++ )
    {
        memcpy(&dfX, data + iOffset, sizeof(double));
        memcpy(&dfY, data + iOffset + sizeof(double), sizeof(double));
        iOffset += nDim * sizeof(double);
        if( OGR_SWAP(eByteOrder))
        {
            CPL_SWAP64PTR(&dfX);
            CPL_SWAP64PTR(&dfY);
        }
        sEnvelope.MinX = std::min(sEnvelope.MinX, dfX);
        sEnvelope.MinY = std::min(sEnvelope.MinY, dfY);
        sEnvelope.MaxX = std::max(sEnvelope.MaxX, dfX);
        sEnvelope.MaxY = std::max(sEnvelope.MaxY, dfY);
    }
    return true;
}

/************************************************************************/
/*                         ReadWKBRingSequence()                        */
/************************************************************************/

inline bool ReadWKBRingSequence(const uint8_t* data, size_t size,
                                OGRwkbByteOrder eByteOrder,
                                int nDim,
                                size_t& iOffset, OGREnvelope& sEnvelope)
{
    const uint32_t nRings = ReadWKBUInt32(data, eByteOrder, iOffset);
    if( nRings > (size - iOffset) / sizeof(uint32_t) )
        return false;
    for(uint32_t i = 0; i < nRings; i++ )
    {
        if( iOffset + sizeof(uint32_t) > size )
            return false;
        if( !ReadWKBPointSequence(data, size, eByteOrder, nDim, iOffset, sEnvelope) )
            return false;
    }
    return true;
}

/************************************************************************/
/*                          ReadWKBBoundingBox()                        */
/************************************************************************/

constexpr uint32_t WKB_PREFIX_SIZE = 1 + sizeof(uint32_t);
constexpr uint32_t MIN_WKB_SIZE = WKB_PREFIX_SIZE + sizeof(uint32_t);

static bool ReadWKBBoundingBoxInternal(const uint8_t* data, size_t size,
                                        size_t& iOffset, OGREnvelope& sEnvelope,
                                        int nRec)
{
    if( size - iOffset < MIN_WKB_SIZE )
        return false;
    const int nByteOrder = DB2_V72_FIX_BYTE_ORDER(data[iOffset]);
    if( !(nByteOrder == wkbXDR || nByteOrder == wkbNDR) )
        return false;
    const OGRwkbByteOrder eByteOrder = static_cast<OGRwkbByteOrder>(nByteOrder);

    OGRwkbGeometryType eGeometryType = wkbUnknown;
    OGRReadWKBGeometryType(data + iOffset, wkbVariantIso, &eGeometryType);
    iOffset += 5;
    const auto eFlatType = wkbFlatten(eGeometryType);
    const int nDim = 2 + (OGR_GT_HasZ(eGeometryType) ? 1 : 0) +
                         (OGR_GT_HasM(eGeometryType) ? 1 : 0);

    if( eFlatType == wkbPoint )
    {
        if( size - iOffset < nDim * sizeof(double) )
            return false;
        double dfX = 0;
        double dfY = 0;
        memcpy(&dfX, data + iOffset, sizeof(double));
        memcpy(&dfY, data + iOffset + sizeof(double), sizeof(double));
        iOffset += nDim * sizeof(double);
        if( OGR_SWAP(eByteOrder))
        {
            CPL_SWAP64PTR(&dfX);
            CPL_SWAP64PTR(&dfY);
        }
        sEnvelope.MinX = dfX;
        sEnvelope.MinY = dfY;
        sEnvelope.MaxX = dfX;
        sEnvelope.MaxY = dfY;
        return true;
    }

    if( eFlatType == wkbLineString || eFlatType == wkbCircularString )
    {
        sEnvelope.MinX = std::numeric_limits<double>::max();
        sEnvelope.MinY = std::numeric_limits<double>::max();
        sEnvelope.MaxX = -std::numeric_limits<double>::max();
        sEnvelope.MaxY = -std::numeric_limits<double>::max();

        return ReadWKBPointSequence(data, size, eByteOrder, nDim, iOffset, sEnvelope);
    }

    if( eFlatType == wkbPolygon )
    {
        sEnvelope.MinX = std::numeric_limits<double>::max();
        sEnvelope.MinY = std::numeric_limits<double>::max();
        sEnvelope.MaxX = -std::numeric_limits<double>::max();
        sEnvelope.MaxY = -std::numeric_limits<double>::max();

        return ReadWKBRingSequence(data, size, eByteOrder, nDim, iOffset, sEnvelope);
    }

    if( eFlatType == wkbMultiPoint )
    {
        sEnvelope.MinX = std::numeric_limits<double>::max();
        sEnvelope.MinY = std::numeric_limits<double>::max();
        sEnvelope.MaxX = -std::numeric_limits<double>::max();
        sEnvelope.MaxY = -std::numeric_limits<double>::max();

        uint32_t nParts = ReadWKBUInt32(data, eByteOrder, iOffset);
        if( nParts > (size - iOffset) / (WKB_PREFIX_SIZE + nDim * sizeof(double)) )
            return false;
        double dfX = 0;
        double dfY = 0;
        for( uint32_t k = 0; k < nParts; k++ )
        {
            iOffset += WKB_PREFIX_SIZE;
            memcpy(&dfX, data + iOffset, sizeof(double));
            memcpy(&dfY, data + iOffset + sizeof(double), sizeof(double));
            iOffset += nDim * sizeof(double);
            if( OGR_SWAP(eByteOrder))
            {
                CPL_SWAP64PTR(&dfX);
                CPL_SWAP64PTR(&dfY);
            }
            sEnvelope.MinX = std::min(sEnvelope.MinX, dfX);
            sEnvelope.MinY = std::min(sEnvelope.MinY, dfY);
            sEnvelope.MaxX = std::max(sEnvelope.MaxX, dfX);
            sEnvelope.MaxY = std::max(sEnvelope.MaxY, dfY);
        }
        return true;
    }

    if( eFlatType == wkbMultiLineString )
    {
        sEnvelope.MinX = std::numeric_limits<double>::max();
        sEnvelope.MinY = std::numeric_limits<double>::max();
        sEnvelope.MaxX = -std::numeric_limits<double>::max();
        sEnvelope.MaxY = -std::numeric_limits<double>::max();

        const uint32_t nParts = ReadWKBUInt32(data, eByteOrder, iOffset);
        if( nParts > (size - iOffset) / MIN_WKB_SIZE )
            return false;
        for( uint32_t k = 0; k < nParts; k++ )
        {
            if( iOffset + MIN_WKB_SIZE > size )
                return false;
            iOffset += WKB_PREFIX_SIZE;
            if( !ReadWKBPointSequence(data, size, eByteOrder, nDim, iOffset, sEnvelope) )
                return false;
        }
        return true;
    }

    if( eFlatType == wkbMultiPolygon )
    {
        sEnvelope.MinX = std::numeric_limits<double>::max();
        sEnvelope.MinY = std::numeric_limits<double>::max();
        sEnvelope.MaxX = -std::numeric_limits<double>::max();
        sEnvelope.MaxY = -std::numeric_limits<double>::max();

        const uint32_t nParts = ReadWKBUInt32(data, eByteOrder, iOffset);
        if( nParts > (size - iOffset) / MIN_WKB_SIZE )
            return false;
        for( uint32_t k = 0; k < nParts; k++ )
        {
            if( iOffset + MIN_WKB_SIZE > size )
                return false;
            CPLAssert( data[iOffset] == eByteOrder );
            iOffset += WKB_PREFIX_SIZE;
            if( !ReadWKBRingSequence(data, size, eByteOrder, nDim, iOffset, sEnvelope) )
                return false;
        }
        return true;
    }

    if( eFlatType == wkbGeometryCollection ||
        eFlatType == wkbCompoundCurve ||
        eFlatType == wkbCurvePolygon ||
        eFlatType == wkbMultiCurve ||
        eFlatType == wkbMultiSurface )
    {
        if( nRec == 128 )
            return false;
        sEnvelope.MinX = std::numeric_limits<double>::max();
        sEnvelope.MinY = std::numeric_limits<double>::max();
        sEnvelope.MaxX = -std::numeric_limits<double>::max();
        sEnvelope.MaxY = -std::numeric_limits<double>::max();

        const uint32_t nParts = ReadWKBUInt32(data, eByteOrder, iOffset);
        if( nParts > (size - iOffset) / MIN_WKB_SIZE )
            return false;
        OGREnvelope sEnvelopeSubGeom;
        for( uint32_t k = 0; k < nParts; k++ )
        {
            if( !ReadWKBBoundingBoxInternal(data, size, iOffset, sEnvelopeSubGeom, nRec + 1) )
                return false;
            sEnvelope.Merge(sEnvelopeSubGeom);
        }
        return true;
    }

    return false;
}

inline bool OGRArrowLayer::ReadWKBBoundingBox(const uint8_t* data, size_t size, OGREnvelope& sEnvelope)
{
    size_t iOffset = 0;
    return ReadWKBBoundingBoxInternal(data, size, iOffset, sEnvelope, 0);
}

/************************************************************************/
/*                            ReadList()                                */
/************************************************************************/

template<class OGRType, class ArrowType, class ArrayType>
static void ReadList(OGRFeature* poFeature, int i,
                     int64_t nIdxInBatch,
                     const ArrayType* array)
{
    const auto values = std::static_pointer_cast<ArrowType>(array->values());
    const auto nIdxStart = array->value_offset(nIdxInBatch);
    const int nCount = array->value_length(nIdxInBatch);
    std::vector<OGRType> aValues;
    aValues.reserve(nCount);
    for( int k = 0; k < nCount; k++ )
    {
        aValues.push_back(static_cast<OGRType>(values->Value(nIdxStart + k)));
    }
    poFeature->SetField( i, nCount, aValues.data() );
}

template<class ArrowType, class ArrayType>
static void ReadListDouble(OGRFeature* poFeature, int i,
                           int64_t nIdxInBatch,
                           const ArrayType* array)
{
    const auto values = std::static_pointer_cast<ArrowType>(array->values());
    const auto rawValues = values->raw_values();
    const auto nIdxStart = array->value_offset(nIdxInBatch);
    const int nCount = array->value_length(nIdxInBatch);
    std::vector<double> aValues;
    aValues.reserve(nCount);
    for( int k = 0; k < nCount; k++ )
    {
        if( values->IsNull(nIdxStart + k) )
            aValues.push_back(std::numeric_limits<double>::quiet_NaN());
        else
            aValues.push_back(rawValues[nIdxStart + k]);
    }
    poFeature->SetField( i, nCount, aValues.data() );
}

template<class ArrayType>
static void ReadList(OGRFeature* poFeature, int i,
                     int64_t nIdxInBatch,
                     const ArrayType* array,
                     arrow::Type::type valueTypeId)
{
    switch( valueTypeId )
    {
        case arrow::Type::BOOL:
        {
            ReadList<int, arrow::BooleanArray>(poFeature, i,
                                                 nIdxInBatch,
                                                 array);
            break;
        }
        case arrow::Type::UINT8:
        {
            ReadList<int, arrow::UInt8Array>(poFeature, i,
                                               nIdxInBatch,
                                               array);
            break;
        }
        case arrow::Type::INT8:
        {
            ReadList<int, arrow::Int8Array>(poFeature, i,
                                              nIdxInBatch,
                                              array);
            break;
        }
        case arrow::Type::UINT16:
        {
            ReadList<int, arrow::UInt16Array>(poFeature, i,
                                                nIdxInBatch,
                                                array);
            break;
        }
        case arrow::Type::INT16:
        {
            ReadList<int, arrow::Int16Array>(poFeature, i,
                                               nIdxInBatch,
                                               array);
            break;
        }
        case arrow::Type::INT32:
        {
            ReadList<int, arrow::Int32Array>(poFeature, i,
                                               nIdxInBatch,
                                               array);
            break;
        }
        case arrow::Type::UINT32:
        {
            ReadList<GIntBig, arrow::UInt32Array>(poFeature, i,
                                                    nIdxInBatch,
                                                    array);
            break;
        }
        case arrow::Type::INT64:
        {
            ReadList<GIntBig, arrow::Int64Array>(poFeature, i,
                                                   nIdxInBatch,
                                                   array);
            break;
        }
        case arrow::Type::UINT64:
        {
            ReadList<double, arrow::UInt64Array>(poFeature, i,
                                                   nIdxInBatch,
                                                   array);
            break;
        }
        case arrow::Type::HALF_FLOAT:
        {
            ReadListDouble<arrow::HalfFloatArray>(poFeature, i,
                                                    nIdxInBatch,
                                                    array);
            break;
        }
        case arrow::Type::FLOAT:
        {
            ReadListDouble<arrow::FloatArray>(poFeature, i,
                                                nIdxInBatch,
                                                array);
            break;
        }
        case arrow::Type::DOUBLE:
        {
            ReadListDouble<arrow::DoubleArray>(poFeature, i,
                                                 nIdxInBatch,
                                                 array);
            break;
        }
        case arrow::Type::STRING:
        {
            const auto values = std::static_pointer_cast<arrow::StringArray>(array->values());
            const auto nIdxStart = array->value_offset(nIdxInBatch);
            const int nCount = array->value_length(nIdxInBatch);
            CPLStringList aosList;
            for( int k = 0; k < nCount; k++ )
            {
                if( values->IsNull(nIdxStart + k) )
                    aosList.AddString(""); // we cannot have null strings in a list
                else
                    aosList.AddString(values->GetString(nIdxStart + k).c_str());
            }
            poFeature->SetField( i, aosList.List() );
            break;
        }

        default:
            break;
    }
}

/************************************************************************/
/*                            ReadMap()                                 */
/************************************************************************/

template<class OGRType, class ArrowType>
static void ReadMap(OGRFeature* poFeature, int i,
                    int64_t nIdxInBatch,
                    const arrow::MapArray* array)
{
    const auto keys = std::static_pointer_cast<arrow::StringArray>(array->keys());
    const auto values = std::static_pointer_cast<ArrowType>(array->items());
    const auto nIdxStart = array->value_offset(nIdxInBatch);
    const int nCount = array->value_length(nIdxInBatch);
    CPLJSONObject oRoot;
    for( int k = 0; k < nCount; k++ )
    {
        if( !keys->IsNull(nIdxStart + k) )
        {
            const auto osKey = keys->GetString(nIdxStart + k);
            if( !values->IsNull(nIdxStart + k) )
                oRoot.Add(osKey, static_cast<OGRType>(values->Value(nIdxStart + k)));
            else
                oRoot.AddNull(osKey);
        }
    }
    poFeature->SetField(i, oRoot.Format(CPLJSONObject::PrettyFormat::Plain).c_str());
}

/************************************************************************/
/*                         SetPointsOfLine()                            */
/************************************************************************/

template<bool bHasZ, bool bHasM, int nDim>
void SetPointsOfLine(OGRLineString* poLS,
                     const std::shared_ptr<arrow::DoubleArray>& pointValues,
                     int pointOffset,
                     int numPoints)
{
    if( !bHasZ && !bHasM )
    {
        static_assert(sizeof(OGRRawPoint) == 2 * sizeof(double),
                      "sizeof(OGRRawPoint) == 2 * sizeof(double)");
        poLS->setPoints(numPoints,
                        reinterpret_cast<const OGRRawPoint*>(
                            pointValues->raw_values() + pointOffset));
        return;
    }

    poLS->setNumPoints(numPoints, FALSE);
    for( int k = 0; k < numPoints; k++ )
    {
        if( bHasZ )
        {
            if( bHasM )
            {
                poLS->setPoint(k,
                               pointValues->Value(pointOffset + nDim * k),
                               pointValues->Value(pointOffset + nDim * k + 1),
                               pointValues->Value(pointOffset + nDim * k + 2),
                               pointValues->Value(pointOffset + nDim * k + 3));
            }
            else
            {
                poLS->setPoint(k,
                               pointValues->Value(pointOffset + nDim * k),
                               pointValues->Value(pointOffset + nDim * k + 1),
                               pointValues->Value(pointOffset + nDim * k + 2));
            }
        }
        else /* if( bHasM ) */
        {
            poLS->setPointM(k,
                            pointValues->Value(pointOffset + nDim * k),
                            pointValues->Value(pointOffset + nDim * k + 1),
                            pointValues->Value(pointOffset + nDim * k + 2));
        }
    }
}

typedef void (*SetPointsOfLineType)(OGRLineString*,
                                    const std::shared_ptr<arrow::DoubleArray>&,
                                    int, int);

static SetPointsOfLineType GetSetPointsOfLine(bool bHasZ, bool bHasM)
{
    if( bHasZ && bHasM )
        return SetPointsOfLine<true, true, 4>;
    if( bHasZ )
        return SetPointsOfLine<true, false, 3>;
    if( bHasM )
        return SetPointsOfLine<false, true, 3>;
    return SetPointsOfLine<false, false, 2>;
}

/************************************************************************/
/*                            TimestampToOGR()                          */
/************************************************************************/

inline void OGRArrowLayer::TimestampToOGR(int64_t timestamp,
                                          const arrow::TimestampType* timestampType,
                                          OGRField* psField)
{
    const auto unit = timestampType->unit();
    double floatingPart = 0;
    if( unit == arrow::TimeUnit::MILLI )
    {
        floatingPart = (timestamp % 1000) / 1e3;
        timestamp /= 1000;
    }
    else if( unit == arrow::TimeUnit::MICRO )
    {
        floatingPart = (timestamp % (1000 * 1000)) / 1e6;
        timestamp /= 1000 * 1000;
    }
    else if( unit == arrow::TimeUnit::NANO )
    {
        floatingPart = (timestamp % (1000 * 1000 * 1000)) / 1e9;
        timestamp /= 1000 * 1000 * 1000;
    }
    int nTZFlag = 0;
    const auto osTZ = timestampType->timezone();
    if( osTZ == "UTC" || osTZ == "Etc/UTC" )
    {
        nTZFlag = 100;
    }
    else if( osTZ.size() == 6 &&
             (osTZ[0] == '+' || osTZ[0] == '-') &&
             osTZ[3] == ':' )
    {
        int nTZHour = atoi(osTZ.c_str() + 1);
        int nTZMin = atoi(osTZ.c_str() + 4);
        if( nTZHour >= 0 && nTZHour <= 14 &&
            nTZMin >= 0 && nTZMin < 60 &&
            (nTZMin % 15) == 0 )
        {
            nTZFlag = (nTZHour * 4) + (nTZMin / 15);
            if( osTZ[0] == '+' )
            {
                nTZFlag = 100 + nTZFlag;
                timestamp += nTZHour * 3600 + nTZMin * 60;
            }
            else
            {
                nTZFlag = 100 - nTZFlag;
                timestamp -= nTZHour * 3600 + nTZMin * 60;
            }
        }
    }
    struct tm dt;
    CPLUnixTimeToYMDHMS(timestamp, &dt);
    psField->Date.Year = static_cast<GInt16>(dt.tm_year + 1900);
    psField->Date.Month = static_cast<GByte>(dt.tm_mon + 1);
    psField->Date.Day = static_cast<GByte>(dt.tm_mday);
    psField->Date.Hour = static_cast<GByte>(dt.tm_hour);
    psField->Date.Minute = static_cast<GByte>(dt.tm_min);
    psField->Date.TZFlag = static_cast<GByte>(nTZFlag);
    psField->Date.Second = static_cast<float>(dt.tm_sec + floatingPart);
}

/************************************************************************/
/*                            ReadFeature()                             */
/************************************************************************/

inline
OGRFeature* OGRArrowLayer::ReadFeature(
    int64_t nIdxInBatch,
    const std::vector<std::shared_ptr<arrow::Array>>& poColumnArrays) const
{
    OGRFeature* poFeature = new OGRFeature(m_poFeatureDefn);

    if( m_iFIDArrowColumn >= 0 )
    {
        const int iCol = m_bIgnoredFields ? m_nRequestedFIDColumn : m_iFIDArrowColumn;
        const arrow::Array* array = poColumnArrays[iCol].get();
        if( !array->IsNull(nIdxInBatch) )
        {
            if( array->type_id() == arrow::Type::INT64 )
            {
                const auto castArray = static_cast<const arrow::Int64Array*>(array);
                poFeature->SetFID(static_cast<GIntBig>(castArray->Value(nIdxInBatch)));
            }
            else if( array->type_id() == arrow::Type::INT32 )
            {
                const auto castArray = static_cast<const arrow::Int32Array*>(array);
                poFeature->SetFID(castArray->Value(nIdxInBatch));
            }
        }
    }

    const int nFieldCount = m_poFeatureDefn->GetFieldCount();
    for( int i = 0; i < nFieldCount; ++i )
    {
        int iCol;
        if( m_bIgnoredFields )
        {
            iCol = m_anMapFieldIndexToArrayIndex[i];
            if( iCol < 0 )
                continue;
        }
        else
        {
            iCol = m_anMapFieldIndexToArrowColumn[i][0];
        }

        const arrow::Array* array = poColumnArrays[iCol].get();
        if( array->IsNull(nIdxInBatch) )
        {
            poFeature->SetFieldNull(i);
            continue;
        }

        int j = 1;
        bool bSkipToNextField = false;
        while( array->type_id() == arrow::Type::STRUCT )
        {
            const auto castArray = static_cast<const arrow::StructArray*>(array);
            const auto& subArrays = castArray->fields();
            CPLAssert( j < static_cast<int>(m_anMapFieldIndexToArrowColumn[i].size()) );
            const int iArrowSubcol = m_anMapFieldIndexToArrowColumn[i][j];
            j ++;
            CPLAssert( iArrowSubcol < static_cast<int>(subArrays.size()) );
            array = subArrays[iArrowSubcol].get();
            if( array->IsNull(nIdxInBatch) )
            {
                poFeature->SetFieldNull(i);
                bSkipToNextField = true;
                break;
            }
        }
        if( bSkipToNextField )
            continue;

        if( array->type_id() == arrow::Type::DICTIONARY )
        {
            const auto castArray = static_cast<const arrow::DictionaryArray*>(array);
            m_poReadFeatureTmpArray = castArray->indices(); // does not return a const reference
            array = m_poReadFeatureTmpArray.get();
            if( array->IsNull(nIdxInBatch) )
            {
                poFeature->SetFieldNull(i);
                continue;
            }
        }

        switch( array->type_id() )
        {
            case arrow::Type::NA:
                break;

            case arrow::Type::BOOL:
            {
                const auto castArray = static_cast<const arrow::BooleanArray*>(array);
                poFeature->SetFieldSameTypeUnsafe(i, castArray->Value(nIdxInBatch));
                break;
            }
            case arrow::Type::UINT8:
            {
                const auto castArray = static_cast<const arrow::UInt8Array*>(array);
                poFeature->SetFieldSameTypeUnsafe(i, castArray->Value(nIdxInBatch));
                break;
            }
            case arrow::Type::INT8:
            {
                const auto castArray = static_cast<const arrow::Int8Array*>(array);
                poFeature->SetFieldSameTypeUnsafe(i, castArray->Value(nIdxInBatch));
                break;
            }
            case arrow::Type::UINT16:
            {
                const auto castArray = static_cast<const arrow::UInt16Array*>(array);
                poFeature->SetFieldSameTypeUnsafe(i, castArray->Value(nIdxInBatch));
                break;
            }
            case arrow::Type::INT16:
            {
                const auto castArray = static_cast<const arrow::Int16Array*>(array);
                poFeature->SetFieldSameTypeUnsafe(i, castArray->Value(nIdxInBatch));
                break;
            }
            case arrow::Type::UINT32:
            {
                const auto castArray = static_cast<const arrow::UInt32Array*>(array);
                poFeature->SetFieldSameTypeUnsafe(i, static_cast<GIntBig>(castArray->Value(nIdxInBatch)));
                break;
            }
            case arrow::Type::INT32:
            {
                const auto castArray = static_cast<const arrow::Int32Array*>(array);
                poFeature->SetFieldSameTypeUnsafe(i, castArray->Value(nIdxInBatch));
                break;
            }
            case arrow::Type::UINT64:
            {
                const auto castArray = static_cast<const arrow::UInt64Array*>(array);
                poFeature->SetFieldSameTypeUnsafe(i, static_cast<double>(castArray->Value(nIdxInBatch)));
                break;
            }
            case arrow::Type::INT64:
            {
                const auto castArray = static_cast<const arrow::Int64Array*>(array);
                poFeature->SetFieldSameTypeUnsafe(i, static_cast<GIntBig>(castArray->Value(nIdxInBatch)));
                break;
            }
            case arrow::Type::HALF_FLOAT:
            {
                const auto castArray = static_cast<const arrow::HalfFloatArray*>(array);
                poFeature->SetFieldSameTypeUnsafe(i, castArray->Value(nIdxInBatch));
                break;
            }
            case arrow::Type::FLOAT:
            {
                const auto castArray = static_cast<const arrow::FloatArray*>(array);
                poFeature->SetFieldSameTypeUnsafe(i, castArray->Value(nIdxInBatch));
                break;
            }
            case arrow::Type::DOUBLE:
            {
                const auto castArray = static_cast<const arrow::DoubleArray*>(array);
                poFeature->SetFieldSameTypeUnsafe(i, castArray->Value(nIdxInBatch));
                break;
            }
            case arrow::Type::STRING:
            {
                const auto castArray = static_cast<const arrow::StringArray*>(array);
                int out_length = 0;
                const uint8_t* data = castArray->GetValue(nIdxInBatch, &out_length);
                char* pszString = static_cast<char*>(CPLMalloc(out_length + 1));
                memcpy(pszString, data, out_length);
                pszString[out_length] = 0;
                poFeature->SetFieldSameTypeUnsafe(i, pszString);
                break;
            }
            case arrow::Type::BINARY:
            {
                const auto castArray = static_cast<const arrow::BinaryArray*>(array);
                int out_length = 0;
                const uint8_t* data = castArray->GetValue(nIdxInBatch, &out_length);
                poFeature->SetField(i, out_length, data);
                break;
            }
            case arrow::Type::FIXED_SIZE_BINARY:
            {
                const auto castArray = static_cast<const arrow::FixedSizeBinaryArray*>(array);
                const uint8_t* data = castArray->GetValue(nIdxInBatch);
                poFeature->SetField(i, castArray->byte_width(), data);
                break;
            }
            case arrow::Type::DATE32:
            {
                // number of days since Epoch
                const auto castArray = static_cast<const arrow::Date32Array*>(array);
                int64_t timestamp = static_cast<int64_t>(castArray->Value(nIdxInBatch)) * 3600 * 24;
                struct tm dt;
                CPLUnixTimeToYMDHMS(timestamp, &dt);
                poFeature->SetField(i, dt.tm_year + 1900, dt.tm_mon + 1, dt.tm_mday,
                                    0,0,0);
                break;
            }
            case arrow::Type::DATE64:
            {
                // number of milliseconds since Epoch
                const auto castArray = static_cast<const arrow::Date64Array*>(array);
                int64_t timestamp = static_cast<int64_t>(castArray->Value(nIdxInBatch)) / 1000;
                struct tm dt;
                CPLUnixTimeToYMDHMS(timestamp, &dt);
                poFeature->SetField(i, dt.tm_year + 1900, dt.tm_mon + 1, dt.tm_mday,
                                    0,0,0);
                break;
            }
            case arrow::Type::TIMESTAMP:
            {
                const auto timestampType =  static_cast<arrow::TimestampType*>(array->data()->type.get());
                const auto castArray = static_cast<const arrow::Int64Array*>(array);
                const int64_t timestamp = castArray->Value(nIdxInBatch);
                OGRField sField;
                sField.Set.nMarker1 = OGRUnsetMarker;
                sField.Set.nMarker2 = OGRUnsetMarker;
                sField.Set.nMarker3 = OGRUnsetMarker;
                TimestampToOGR(timestamp, timestampType, &sField);
                poFeature->SetField(i, &sField);
                break;
            }
            case arrow::Type::TIME32:
            {
                const auto timestampType =  static_cast<arrow::Time32Type*>(array->data()->type.get());
                const auto castArray = static_cast<const arrow::Int32Array*>(array);
                const auto unit = timestampType->unit();
                int value = castArray->Value(nIdxInBatch);
                double floatingPart = 0;
                if( unit == arrow::TimeUnit::MILLI )
                {
                    floatingPart = (value % 1000) / 1e3;
                    value /= 1000;
                }
                const int nHour = value / 3600;
                const int nMinute = (value / 60) % 60;
                const int nSecond = value % 60;
                poFeature->SetField(i, 0, 0, 0, nHour, nMinute,
                                    static_cast<float>(nSecond + floatingPart));
                break;
            }
            case arrow::Type::TIME64:
            {
                const auto castArray = static_cast<const arrow::Time64Array*>(array);
                poFeature->SetField(i, static_cast<GIntBig>(castArray->Value(nIdxInBatch)));
                break;
            }

            case arrow::Type::DECIMAL128:
            {
                const auto castArray = static_cast<const arrow::Decimal128Array*>(array);
                poFeature->SetField(i, CPLAtof(castArray->FormatValue(nIdxInBatch).c_str()));
                break;
            }

            case arrow::Type::DECIMAL256:
            {
                const auto castArray = static_cast<const arrow::Decimal256Array*>(array);
                poFeature->SetField(i, CPLAtof(castArray->FormatValue(nIdxInBatch).c_str()));
                break;
            }

            case arrow::Type::LIST:
            {
                const auto castArray = static_cast<const arrow::ListArray*>(array);
                const auto listType = static_cast<const arrow::ListType*>(array->data()->type.get());
                ReadList(poFeature, i, nIdxInBatch, castArray, listType->value_field()->type()->id());
                break;
            }

            case arrow::Type::FIXED_SIZE_LIST:
            {
                const auto castArray = static_cast<const arrow::FixedSizeListArray*>(array);
                const auto listType = static_cast<const arrow::FixedSizeListType*>(array->data()->type.get());
                ReadList(poFeature, i, nIdxInBatch, castArray, listType->value_field()->type()->id());
                break;
            }

            case arrow::Type::LARGE_STRING:
            {
                const auto castArray = static_cast<const arrow::LargeStringArray*>(array);
                poFeature->SetField(i, castArray->GetString(nIdxInBatch).c_str());
                break;
            }
            case arrow::Type::LARGE_BINARY:
            {
                const auto castArray = static_cast<const arrow::LargeBinaryArray*>(array);
                arrow::LargeBinaryArray::offset_type out_length = 0;
                const uint8_t* data = castArray->GetValue(nIdxInBatch, &out_length);
                if( out_length <= INT_MAX )
                {
                    poFeature->SetField(i, static_cast<int>(out_length), data);
                }
                else
                {
                    // this is probably the most likely code path if people use LargeBinary...
                    CPLError(CE_Warning, CPLE_AppDefined,
                             "Too large binary: " CPL_FRMT_GUIB " bytes",
                             static_cast<GUIntBig>(out_length));
                }
                break;
            }

            case arrow::Type::MAP:
            {
                const auto castArray = static_cast<const arrow::MapArray*>(array);
                const auto mapType = static_cast<const arrow::MapType*>(array->data()->type.get());
                const auto itemTypeId = mapType->item_type()->id();
                if( mapType->key_type()->id() == arrow::Type::STRING )
                {
                    if( itemTypeId == arrow::Type::BOOL )
                    {
                        ReadMap<bool, arrow::BooleanArray>(poFeature, i,
                                                           nIdxInBatch,
                                                           castArray);
                    }
                    else if( itemTypeId == arrow::Type::UINT8 )
                    {
                        ReadMap<int, arrow::UInt8Array>(poFeature, i,
                                                        nIdxInBatch,
                                                        castArray);
                    }
                    else if( itemTypeId == arrow::Type::INT8 )
                    {
                        ReadMap<int, arrow::Int8Array>(poFeature, i,
                                                       nIdxInBatch,
                                                       castArray);
                    }
                    else if( itemTypeId == arrow::Type::UINT16 )
                    {
                        ReadMap<int, arrow::UInt16Array>(poFeature, i,
                                                         nIdxInBatch,
                                                         castArray);
                    }
                    else if( itemTypeId == arrow::Type::INT16 )
                    {
                        ReadMap<int, arrow::Int16Array>(poFeature, i,
                                                        nIdxInBatch,
                                                        castArray);
                    }
                    else if( itemTypeId == arrow::Type::UINT32 )
                    {
                        ReadMap<GIntBig, arrow::UInt32Array>(poFeature, i,
                                                             nIdxInBatch,
                                                             castArray);
                    }
                    else if( itemTypeId == arrow::Type::INT32 )
                    {
                        ReadMap<int, arrow::Int32Array>(poFeature, i,
                                                        nIdxInBatch,
                                                        castArray);
                    }
                    else if( itemTypeId == arrow::Type::UINT64 )
                    {
                        ReadMap<double, arrow::UInt64Array>(poFeature, i,
                                                            nIdxInBatch,
                                                            castArray);
                    }
                    else if( itemTypeId == arrow::Type::INT64 )
                    {
                        ReadMap<GIntBig, arrow::Int64Array>(poFeature, i,
                                                            nIdxInBatch,
                                                            castArray);
                    }
                    else if( itemTypeId == arrow::Type::FLOAT )
                    {
                        ReadMap<double, arrow::FloatArray>(poFeature, i,
                                                           nIdxInBatch,
                                                           castArray);
                    }
                    else if( itemTypeId == arrow::Type::DOUBLE )
                    {
                        ReadMap<double, arrow::DoubleArray>(poFeature, i,
                                                            nIdxInBatch,
                                                            castArray);
                    }
                    else if( itemTypeId == arrow::Type::STRING )
                    {
                        const auto keys = std::static_pointer_cast<arrow::StringArray>(castArray->keys());
                        const auto values = std::static_pointer_cast<arrow::StringArray>(castArray->items());
                        const auto nIdxStart = castArray->value_offset(nIdxInBatch);
                        const int nCount = castArray->value_length(nIdxInBatch);
                        CPLJSONDocument oDoc;
                        auto oRoot = oDoc.GetRoot();
                        for( int k = 0; k < nCount; k++ )
                        {
                            if( !keys->IsNull(nIdxStart + k) )
                            {
                                const auto osKey = keys->GetString(nIdxStart + k);
                                if( !values->IsNull(nIdxStart + k) )
                                    oRoot.Add(osKey, values->GetString(nIdxStart + k));
                                else
                                    oRoot.AddNull(osKey);
                            }
                        }
                        poFeature->SetField(i, oRoot.Format(CPLJSONObject::PrettyFormat::Plain).c_str());
                    }
                }
                break;
            }

            // unhandled types
            case arrow::Type::STRUCT: // should not happen
            case arrow::Type::INTERVAL_MONTHS:
            case arrow::Type::INTERVAL_DAY_TIME:
            case arrow::Type::SPARSE_UNION:
            case arrow::Type::DENSE_UNION:
            case arrow::Type::DICTIONARY:
            case arrow::Type::EXTENSION:
            case arrow::Type::DURATION:
            case arrow::Type::LARGE_LIST:
            case arrow::Type::INTERVAL_MONTH_DAY_NANO:
            case arrow::Type::MAX_ID:
            {
                // Shouldn't happen normally as we should have discarded those
                // fields when creating OGR field definitions
                CPLError(CE_Warning, CPLE_AppDefined,
                         "Cannot read content for field %s",
                         m_poFeatureDefn->GetFieldDefn(i)->GetNameRef());
                break;
            }
        }
    }

    const int nGeomFieldCount = m_poFeatureDefn->GetGeomFieldCount();
    for( int i = 0; i < nGeomFieldCount; ++i )
    {
        int iCol;
        if( m_bIgnoredFields )
        {
            iCol = m_anMapGeomFieldIndexToArrayIndex[i];
            if( iCol < 0 )
                continue;
        }
        else
        {
            iCol = m_anMapGeomFieldIndexToArrowColumn[i];
        }

        const auto array = poColumnArrays[iCol].get();
        auto poGeometry = ReadGeometry(i, array, nIdxInBatch);
        if( poGeometry )
        {
            const auto poGeomFieldDefn = m_poFeatureDefn->GetGeomFieldDefn(i);
            if( wkbFlatten(poGeometry->getGeometryType()) == wkbLineString &&
                wkbFlatten(poGeomFieldDefn->GetType()) == wkbMultiLineString )
            {
                poGeometry = OGRGeometryFactory::forceToMultiLineString(poGeometry);
            }
            else if( wkbFlatten(poGeometry->getGeometryType()) == wkbPolygon &&
                     wkbFlatten(poGeomFieldDefn->GetType()) == wkbMultiPolygon )
            {
                poGeometry = OGRGeometryFactory::forceToMultiPolygon(poGeometry);
            }
            if( OGR_GT_HasZ(poGeomFieldDefn->GetType()) && !poGeometry->Is3D() )
            {
                poGeometry->set3D(true);
            }
            poFeature->SetGeomFieldDirectly(i, poGeometry);
        }
    }

    return poFeature;
}

/************************************************************************/
/*                           ReadGeometry()                             */
/************************************************************************/

inline
OGRGeometry* OGRArrowLayer::ReadGeometry(int iGeomField,
                                         const arrow::Array* array,
                                         int64_t nIdxInBatch) const
{
    if( array->IsNull(nIdxInBatch) )
    {
        return nullptr;
    }
    OGRGeometry* poGeometry = nullptr;
    const auto poGeomFieldDefn = m_poFeatureDefn->GetGeomFieldDefn(iGeomField);
    const auto eGeomType = poGeomFieldDefn->GetType();
    const bool bHasZ = CPL_TO_BOOL(OGR_GT_HasZ(eGeomType));
    const bool bHasM = CPL_TO_BOOL(OGR_GT_HasM(eGeomType));
    const int nDim = 2 + (bHasZ ? 1 : 0) + (bHasM ? 1 : 0);

    const auto CreatePoint = [bHasZ, bHasM](const std::shared_ptr<arrow::DoubleArray>& pointValues,
                                            int pointOffset)
    {
        if( bHasZ )
        {
            if( bHasM )
            {
                return new OGRPoint(pointValues->Value(pointOffset),
                                    pointValues->Value(pointOffset + 1),
                                    pointValues->Value(pointOffset + 2),
                                    pointValues->Value(pointOffset + 3));
            }
            else
            {
                return new OGRPoint(pointValues->Value(pointOffset),
                                    pointValues->Value(pointOffset + 1),
                                    pointValues->Value(pointOffset + 2));
            }
        }
        else if( bHasM )
        {
            return OGRPoint::createXYM(pointValues->Value(pointOffset),
                                       pointValues->Value(pointOffset + 1),
                                       pointValues->Value(pointOffset + 2));
        }
        else
        {
            return new OGRPoint(pointValues->Value(pointOffset),
                                pointValues->Value(pointOffset + 1));
        }
    };

    switch( m_aeGeomEncoding[iGeomField] )
    {
        case OGRArrowGeomEncoding::WKB:
        {
            CPLAssert( array->type_id() == arrow::Type::BINARY );
            const auto castArray = static_cast<const arrow::BinaryArray*>(array);
            int out_length = 0;
            const uint8_t* data = castArray->GetValue(nIdxInBatch, &out_length);
            if( OGRGeometryFactory::createFromWkb(
                    data, poGeomFieldDefn->GetSpatialRef(), &poGeometry,
                    out_length ) == OGRERR_NONE )
            {
#ifdef DEBUG_ReadWKBBoundingBox
                OGREnvelope sEnvelopeFromWKB;
                bool bRet = ReadWKBBoundingBox(data, out_length, sEnvelopeFromWKB);
                CPLAssert(bRet);
                OGREnvelope sEnvelopeFromGeom;
                poGeometry->getEnvelope(&sEnvelopeFromGeom);
                CPLAssert(sEnvelopeFromWKB == sEnvelopeFromGeom);
#endif
            }
            break;
        }

        case OGRArrowGeomEncoding::WKT:
        {
            CPLAssert( array->type_id() == arrow::Type::STRING );
            const auto castArray = static_cast<const arrow::StringArray*>(array);
            const auto osWKT = castArray->GetString(nIdxInBatch);
            OGRGeometryFactory::createFromWkt(
                    osWKT.c_str(), poGeomFieldDefn->GetSpatialRef(), &poGeometry );
            break;
        }

        case OGRArrowGeomEncoding::GEOARROW_GENERIC:
        {
            CPLAssert(false);
            break;
        }

        case OGRArrowGeomEncoding::GEOARROW_POINT:
        {
            CPLAssert( array->type_id() == arrow::Type::FIXED_SIZE_LIST );
            const auto listArray = static_cast<const arrow::FixedSizeListArray*>(array);
            CPLAssert( listArray->values()->type_id() == arrow::Type::DOUBLE );
            const auto pointValues = std::static_pointer_cast<arrow::DoubleArray>(listArray->values());
            if( !pointValues->IsNull(nDim * nIdxInBatch) )
            {
                poGeometry = CreatePoint(pointValues, static_cast<int>(nDim * nIdxInBatch));
                poGeometry->assignSpatialReference(poGeomFieldDefn->GetSpatialRef());
            }
            break;
        }

        case OGRArrowGeomEncoding::GEOARROW_LINESTRING:
        {
            CPLAssert( array->type_id() == arrow::Type::LIST );
            const auto listArray = static_cast<const arrow::ListArray*>(array);
            CPLAssert( listArray->values()->type_id() == arrow::Type::FIXED_SIZE_LIST );
            const auto listOfPointsValues = std::static_pointer_cast<arrow::FixedSizeListArray>(listArray->values());
            CPLAssert( listOfPointsValues->values()->type_id() == arrow::Type::DOUBLE );
            const auto pointValues = std::static_pointer_cast<arrow::DoubleArray>(listOfPointsValues->values());
            const auto nPoints = listArray->value_length(nIdxInBatch);
            const auto nPointOffset = listArray->value_offset(nIdxInBatch) * nDim;
            auto poLineString = new OGRLineString();
            poGeometry = poLineString;
            poGeometry->assignSpatialReference(poGeomFieldDefn->GetSpatialRef());
            if( nPoints )
            {
                GetSetPointsOfLine(bHasZ, bHasM)(poLineString, pointValues, nPointOffset, nPoints);
            }
            else
            {
                poGeometry->set3D(bHasZ);
                poGeometry->setMeasured(bHasM);
            }
            break;
        }

        case OGRArrowGeomEncoding::GEOARROW_POLYGON:
        {
            CPLAssert( array->type_id() == arrow::Type::LIST );
            const auto listOfRingsArray = static_cast<const arrow::ListArray*>(array);
            CPLAssert( listOfRingsArray->values()->type_id() == arrow::Type::LIST );
            const auto listOfRingsValues = std::static_pointer_cast<arrow::ListArray>(listOfRingsArray->values());
            CPLAssert( listOfRingsValues->values()->type_id() == arrow::Type::FIXED_SIZE_LIST );
            const auto listOfPointsValues = std::static_pointer_cast<arrow::FixedSizeListArray>(listOfRingsValues->values());
            CPLAssert( listOfPointsValues->values()->type_id() == arrow::Type::DOUBLE );
            const auto pointValues = std::static_pointer_cast<arrow::DoubleArray>(listOfPointsValues->values());
            const auto setPointsFun = GetSetPointsOfLine(bHasZ, bHasM);
            const auto nRings = listOfRingsArray->value_length(nIdxInBatch);
            const auto nRingOffset = listOfRingsArray->value_offset(nIdxInBatch);
            auto poPoly = new OGRPolygon();
            poGeometry = poPoly;
            poGeometry->assignSpatialReference(poGeomFieldDefn->GetSpatialRef());
            for( auto k = decltype(nRings){0}; k < nRings; k++ )
            {
                const auto nPoints = listOfRingsValues->value_length(nRingOffset + k);
                const auto nPointOffset = listOfRingsValues->value_offset(nRingOffset + k) * nDim;
                auto poRing = new OGRLinearRing();
                if( nPoints )
                {
                    setPointsFun(poRing, pointValues, nPointOffset, nPoints);
                }
                poPoly->addRingDirectly(poRing);
            }
            if( poGeometry->IsEmpty() )
            {
                poGeometry->set3D(bHasZ);
                poGeometry->setMeasured(bHasM);
            }
            break;
        }

        case OGRArrowGeomEncoding::GEOARROW_MULTIPOINT:
        {
            CPLAssert( array->type_id() == arrow::Type::LIST );
            const auto listArray = static_cast<const arrow::ListArray*>(array);
            CPLAssert( listArray->values()->type_id() == arrow::Type::FIXED_SIZE_LIST );
            const auto listOfPointsValues = std::static_pointer_cast<arrow::FixedSizeListArray>(listArray->values());
            CPLAssert( listOfPointsValues->values()->type_id() == arrow::Type::DOUBLE );
            const auto pointValues = std::static_pointer_cast<arrow::DoubleArray>(listOfPointsValues->values());
            const auto nPoints = listArray->value_length(nIdxInBatch);
            const auto nPointOffset = listArray->value_offset(nIdxInBatch) * nDim;
            auto poMultiPoint = new OGRMultiPoint();
            poGeometry = poMultiPoint;
            poGeometry->assignSpatialReference(poGeomFieldDefn->GetSpatialRef());
            for( auto k = decltype(nPoints){0}; k < nPoints; k++ )
            {
                poMultiPoint->addGeometryDirectly(
                    CreatePoint(pointValues, nPointOffset + k * nDim));
            }
            if( poGeometry->IsEmpty() )
            {
                poGeometry->set3D(bHasZ);
                poGeometry->setMeasured(bHasM);
            }
            break;
        }

        case OGRArrowGeomEncoding::GEOARROW_MULTILINESTRING:
        {
            CPLAssert( array->type_id() == arrow::Type::LIST );
            const auto listOfStringsArray = static_cast<const arrow::ListArray*>(array);
            CPLAssert( listOfStringsArray->values()->type_id() == arrow::Type::LIST );
            const auto listOfStringsValues = std::static_pointer_cast<arrow::ListArray>(listOfStringsArray->values());
            CPLAssert( listOfStringsValues->values()->type_id() == arrow::Type::FIXED_SIZE_LIST );
            const auto listOfPointsValues = std::static_pointer_cast<arrow::FixedSizeListArray>(listOfStringsValues->values());
            CPLAssert( listOfPointsValues->values()->type_id() == arrow::Type::DOUBLE );
            const auto pointValues = std::static_pointer_cast<arrow::DoubleArray>(listOfPointsValues->values());
            const auto setPointsFun = GetSetPointsOfLine(bHasZ, bHasM);
            const auto nStrings = listOfStringsArray->value_length(nIdxInBatch);
            const auto nRingOffset = listOfStringsArray->value_offset(nIdxInBatch);
            auto poMLS = new OGRMultiLineString();
            poGeometry = poMLS;
            poGeometry->assignSpatialReference(poGeomFieldDefn->GetSpatialRef());
            for( auto k = decltype(nStrings){0}; k < nStrings; k++ )
            {
                const auto nPoints = listOfStringsValues->value_length(nRingOffset + k);
                const auto nPointOffset = listOfStringsValues->value_offset(nRingOffset + k) * nDim;
                auto poLS = new OGRLineString();
                if( nPoints )
                {
                    setPointsFun(poLS, pointValues, nPointOffset, nPoints);
                }
                poMLS->addGeometryDirectly(poLS);
            }
            if( poGeometry->IsEmpty() )
            {
                poGeometry->set3D(bHasZ);
                poGeometry->setMeasured(bHasM);
            }
            break;
        }

        case OGRArrowGeomEncoding::GEOARROW_MULTIPOLYGON:
        {
            CPLAssert( array->type_id() == arrow::Type::LIST );
            const auto listOfPartsArray = static_cast<const arrow::ListArray*>(array);
            CPLAssert( listOfPartsArray->values()->type_id() == arrow::Type::LIST );
            const auto listOfPartsValues = std::static_pointer_cast<arrow::ListArray>(listOfPartsArray->values());
            CPLAssert( listOfPartsValues->values()->type_id() == arrow::Type::LIST );
            const auto listOfRingsValues = std::static_pointer_cast<arrow::ListArray>(listOfPartsValues->values());
            CPLAssert( listOfRingsValues->values()->type_id() == arrow::Type::FIXED_SIZE_LIST );
            const auto listOfPointsValues = std::static_pointer_cast<arrow::FixedSizeListArray>(listOfRingsValues->values());
            CPLAssert( listOfPointsValues->values()->type_id() == arrow::Type::DOUBLE );
            const auto pointValues = std::static_pointer_cast<arrow::DoubleArray>(listOfPointsValues->values());
            auto poMP = new OGRMultiPolygon();
            poGeometry = poMP;
            poGeometry->assignSpatialReference(poGeomFieldDefn->GetSpatialRef());
            const auto setPointsFun = GetSetPointsOfLine(bHasZ, bHasM);
            const auto nParts = listOfPartsArray->value_length(nIdxInBatch);
            const auto nPartOffset = listOfPartsArray->value_offset(nIdxInBatch);
            for( auto j = decltype(nParts){0}; j < nParts; j++ )
            {
                const auto nRings = listOfPartsValues->value_length(nPartOffset + j);
                const auto nRingOffset = listOfPartsValues->value_offset(nPartOffset + j);
                auto poPoly = new OGRPolygon();
                for( auto k = decltype(nRings){0}; k < nRings; k++ )
                {
                    const auto nPoints = listOfRingsValues->value_length(nRingOffset + k);
                    const auto nPointOffset = listOfRingsValues->value_offset(nRingOffset + k) * nDim;
                    auto poRing = new OGRLinearRing();
                    if( nPoints )
                    {
                        setPointsFun(poRing, pointValues, nPointOffset, nPoints);
                    }
                    poPoly->addRingDirectly(poRing);
                }
                poMP->addGeometryDirectly(poPoly);
            }
            if( poGeometry->IsEmpty() )
            {
                poGeometry->set3D(bHasZ);
                poGeometry->setMeasured(bHasM);
            }
            break;
        }
    }
    return poGeometry;
}

/************************************************************************/
/*                           ResetReading()                             */
/************************************************************************/

inline
void OGRArrowLayer::ResetReading()
{
    m_bEOF = false;
    m_nFeatureIdx = 0;
    m_nIdxInBatch = 0;
    m_poReadFeatureTmpArray.reset();
    if( m_iRecordBatch != 0 )
    {
        m_iRecordBatch = -1;
        m_poBatch.reset();
        m_poBatchColumns.clear();
    }
}

/***********************************************************************/
/*                        GetColumnSubNode()                           */
/***********************************************************************/

static const swq_expr_node* GetColumnSubNode(const swq_expr_node* poNode)
{
    if( poNode->eNodeType == SNT_OPERATION &&
        poNode->nSubExprCount == 2 )
    {
        if( poNode->papoSubExpr[0]->eNodeType == SNT_COLUMN )
            return poNode->papoSubExpr[0];
        if( poNode->papoSubExpr[1]->eNodeType == SNT_COLUMN )
            return poNode->papoSubExpr[1];
    }
    return nullptr;
}

/***********************************************************************/
/*                        GetConstantSubNode()                         */
/***********************************************************************/

static const swq_expr_node* GetConstantSubNode(const swq_expr_node* poNode)
{
    if( poNode->eNodeType == SNT_OPERATION &&
        poNode->nSubExprCount == 2 )
    {
        if( poNode->papoSubExpr[1]->eNodeType == SNT_CONSTANT )
            return poNode->papoSubExpr[1];
        if( poNode->papoSubExpr[0]->eNodeType == SNT_CONSTANT )
            return poNode->papoSubExpr[0];
    }
    return nullptr;
}

/***********************************************************************/
/*                           IsComparisonOp()                          */
/***********************************************************************/

static bool IsComparisonOp(int op)
{
    return (op == SWQ_EQ || op == SWQ_NE || op == SWQ_LT ||
            op == SWQ_LE || op == SWQ_GT || op == SWQ_GE);
}

/***********************************************************************/
/*                     FillTargetValueFromSrcExpr()                    */
/***********************************************************************/

static
bool FillTargetValueFromSrcExpr( const OGRFieldDefn* poFieldDefn,
                                 OGRArrowLayer::Constraint* psConstraint,
                                 const swq_expr_node* poSrcValue )
{
    switch( poFieldDefn->GetType() )
    {
        case OFTInteger:
            psConstraint->eType = OGRArrowLayer::Constraint::Type::Integer;
            if (poSrcValue->field_type == SWQ_FLOAT)
                psConstraint->sValue.Integer = static_cast<int>(poSrcValue->float_value);
            else
                psConstraint->sValue.Integer = static_cast<int>(poSrcValue->int_value);
            psConstraint->osValue = std::to_string(psConstraint->sValue.Integer);
            break;

        case OFTInteger64:
            psConstraint->eType = OGRArrowLayer::Constraint::Type::Integer64;
            if (poSrcValue->field_type == SWQ_FLOAT)
                psConstraint->sValue.Integer64 = static_cast<GIntBig>(poSrcValue->float_value);
            else
                psConstraint->sValue.Integer64 = poSrcValue->int_value;
            psConstraint->osValue = std::to_string(psConstraint->sValue.Integer64);
            break;

        case OFTReal:
            psConstraint->eType = OGRArrowLayer::Constraint::Type::Real;
            psConstraint->sValue.Real = poSrcValue->float_value;
            psConstraint->osValue = std::to_string(psConstraint->sValue.Real);
            break;

        case OFTString:
            psConstraint->eType = OGRArrowLayer::Constraint::Type::String;
            psConstraint->sValue.String = poSrcValue->string_value;
            psConstraint->osValue = psConstraint->sValue.String;
            break;
#ifdef not_yet_handled
        case OFTDate:
        case OFTTime:
        case OFTDateTime:
            if (poSrcValue->field_type == SWQ_TIMESTAMP ||
                poSrcValue->field_type == SWQ_DATE ||
                poSrcValue->field_type == SWQ_TIME)
            {
                int nYear = 0, nMonth = 0, nDay = 0, nHour = 0, nMin = 0, nSec = 0;
                if( sscanf(poSrcValue->string_value, "%04d/%02d/%02d %02d:%02d:%02d",
                           &nYear, &nMonth, &nDay, &nHour, &nMin, &nSec) == 6 ||
                    sscanf(poSrcValue->string_value, "%04d/%02d/%02d",
                           &nYear, &nMonth, &nDay) == 3 ||
                    sscanf(poSrcValue->string_value, "%02d:%02d:%02d",
                           &nHour, &nMin, &nSec) == 3 )
                {
                    psConstraint->eType = OGRArrowLayer::Constraint::Type::DateTime;
                    psConstraint->sValue.Date.Year = (GInt16)nYear;
                    psConstraint->sValue.Date.Month = (GByte)nMonth;
                    psConstraint->sValue.Date.Day = (GByte)nDay;
                    psConstraint->sValue.Date.Hour = (GByte)nHour;
                    psConstraint->sValue.Date.Minute = (GByte)nMin;
                    psConstraint->sValue.Date.Second = (GByte)nSec;
                    psConstraint->sValue.Date.TZFlag = 0;
                    psConstraint->sValue.Date.Reserved = 0;
                }
                else
                    return false;
            }
            else
                return false;
            break;
#endif
        default:
            return false;
    }
    return true;
}

/***********************************************************************/
/*                     ExploreExprNode()                               */
/***********************************************************************/

inline void OGRArrowLayer::ExploreExprNode(const swq_expr_node* poNode)
{
    const auto AddConstraint = [this](Constraint& constraint)
    {
        if( m_bIgnoredFields )
        {
            constraint.iArrayIdx = m_anMapFieldIndexToArrayIndex[constraint.iField];
            if( constraint.iArrayIdx < 0 )
                return;
        }
        else
        {
            constraint.iArrayIdx = m_anMapFieldIndexToArrowColumn[constraint.iField][0];
        }

        m_asAttributeFilterConstraints.emplace_back(constraint);
    };

    if( poNode->eNodeType == SNT_OPERATION &&
        poNode->nOperation == SWQ_AND && poNode->nSubExprCount == 2 )
    {
        ExploreExprNode(poNode->papoSubExpr[0]);
        ExploreExprNode(poNode->papoSubExpr[1]);
    }

    else if( poNode->eNodeType == SNT_OPERATION &&
             IsComparisonOp(poNode->nOperation) &&
             poNode->nSubExprCount == 2 )
    {
        const swq_expr_node *poColumn = GetColumnSubNode(poNode);
        const swq_expr_node *poValue = GetConstantSubNode(poNode);
        if( poColumn != nullptr && poValue != nullptr &&
            poColumn->field_index < m_poFeatureDefn->GetFieldCount())
        {
            const OGRFieldDefn *poFieldDefn =
                m_poFeatureDefn->GetFieldDefn(poColumn->field_index);

            Constraint constraint;
            constraint.iField = poColumn->field_index;
            constraint.nOperation = poNode->nOperation;

            if( FillTargetValueFromSrcExpr(poFieldDefn, &constraint, poValue) )
            {
                if( poColumn == poNode->papoSubExpr[0] )
                {
                    // nothing to do
                }
                else
                {
                    /* If "constant op column", then we must reverse */
                    /* the operator for LE, LT, GE, GT */
                    switch( poNode->nOperation )
                    {
                        case SWQ_LE: constraint.nOperation = SWQ_GE; break;
                        case SWQ_LT: constraint.nOperation = SWQ_GT; break;
                        case SWQ_NE: /* do nothing */; break;
                        case SWQ_EQ: /* do nothing */; break;
                        case SWQ_GE: constraint.nOperation = SWQ_LE; break;
                        case SWQ_GT: constraint.nOperation = SWQ_LT; break;
                        default: CPLAssert(false); break;
                    }
                }

                AddConstraint(constraint);
            }
        }
    }

    else if( poNode->eNodeType == SNT_OPERATION &&
             poNode->nOperation == SWQ_ISNULL && poNode->nSubExprCount == 1 )
    {
        const swq_expr_node *poColumn = poNode->papoSubExpr[0];
        if( poColumn->eNodeType == SNT_COLUMN &&
            poColumn->field_index < m_poFeatureDefn->GetFieldCount() )
        {
            Constraint constraint;
            constraint.iField = poColumn->field_index;
            constraint.nOperation = poNode->nOperation;
            AddConstraint(constraint);
        }
    }

    else if( poNode->eNodeType == SNT_OPERATION &&
                poNode->nOperation == SWQ_NOT && poNode->nSubExprCount == 1 &&
                poNode->papoSubExpr[0]->eNodeType == SNT_OPERATION &&
                poNode->papoSubExpr[0]->nOperation == SWQ_ISNULL &&
                poNode->papoSubExpr[0]->nSubExprCount == 1 )
    {
        const swq_expr_node *poColumn = poNode->papoSubExpr[0]->papoSubExpr[0];
        if( poColumn->eNodeType == SNT_COLUMN &&
            poColumn->field_index < m_poFeatureDefn->GetFieldCount() )
        {
            Constraint constraint;
            constraint.iField = poColumn->field_index;
            constraint.nOperation = SWQ_ISNOTNULL;
            AddConstraint(constraint);
        }
    }
}

/***********************************************************************/
/*                         SetAttributeFilter()                        */
/***********************************************************************/

inline
OGRErr OGRArrowLayer::SetAttributeFilter( const char* pszFilter )
{
    m_asAttributeFilterConstraints.clear();

    OGRErr eErr = OGRLayer::SetAttributeFilter(pszFilter);
    if( eErr != OGRERR_NONE )
        return eErr;

    if( m_poAttrQuery != nullptr )
    {
        if( m_nUseOptimizedAttributeFilter < 0 )
        {
            m_nUseOptimizedAttributeFilter = CPLTestBool(
                CPLGetConfigOption(("OGR_" + GetDriverUCName() + "_OPTIMIZED_ATTRIBUTE_FILTER").c_str(), "YES"));
        }
        if( m_nUseOptimizedAttributeFilter )
        {
            swq_expr_node* poNode = static_cast<swq_expr_node*>(m_poAttrQuery->GetSWQExpr());
            poNode->ReplaceBetweenByGEAndLERecurse();
            ExploreExprNode(poNode);
        }
    }

    return OGRERR_NONE;
}

/************************************************************************/
/*                        ConstraintEvaluator()                         */
/************************************************************************/

namespace
{
template<class T, class U> struct CompareGeneric
{
    static inline bool get(int op, const T& val1, const U& val2)
    {
        switch( op )
        {
            case SWQ_LE: return val1 <= val2;
            case SWQ_LT: return val1 < val2;
            case SWQ_NE: return val1 != val2;
            case SWQ_EQ: return val1 == val2;
            case SWQ_GE: return val1 >= val2;
            case SWQ_GT: return val1 > val2;
                break;
            default: CPLAssert(false);
        }
        return true;
    }
};

template<class T, class U> struct Compare
{
};

template<class T> struct Compare<T, T>: public CompareGeneric<T, T> {};
template<> struct Compare<int, GIntBig>: public CompareGeneric<int, GIntBig> {};
template<> struct Compare<double, GIntBig>
{
    static inline bool get(int op, double val1, GIntBig val2)
    {
        return CompareGeneric<double, double>::get(op, val1, static_cast<double>(val2));
    }
};
template<> struct Compare<GIntBig, int>: public CompareGeneric<GIntBig, int> {};
template<> struct Compare<double, int>: public CompareGeneric<double, int> {};

template<class T> static bool ConstraintEvaluator(
                                  const OGRArrowLayer::Constraint& constraint,
                                  const T value)
{
    bool b = false;
    switch( constraint.eType )
    {
        case OGRArrowLayer::Constraint::Type::Integer:
            b = Compare<T,int>::get(
                constraint.nOperation, value, constraint.sValue.Integer);
            break;
        case OGRArrowLayer::Constraint::Type::Integer64:
            b = Compare<T,GIntBig>::get(
                constraint.nOperation, value, constraint.sValue.Integer64);
            break;
        case OGRArrowLayer::Constraint::Type::Real:
            b = Compare<double,double>::get(
                constraint.nOperation, static_cast<double>(value), constraint.sValue.Real);
            break;
        case OGRArrowLayer::Constraint::Type::String:
            b = Compare<std::string, std::string>::get(
                constraint.nOperation, std::to_string(value), constraint.osValue);
            break;
    }
    return b;
}

struct StringView
{
    const char* m_ptr;
    size_t m_len;

    StringView(const char* ptr, size_t len): m_ptr(ptr), m_len(len) {}
};

inline bool CompareStr(int op, const StringView& val1, const std::string& val2)
{
    if( op == SWQ_EQ )
    {
        return val1.m_len == val2.size() &&
               memcmp(val1.m_ptr, val2.data(), val1.m_len) == 0;
    }
    const int cmpRes = val2.compare(0, val2.size(), val1.m_ptr, val1.m_len);
    switch( op )
    {
        case SWQ_LE: return cmpRes >= 0;
        case SWQ_LT: return cmpRes > 0;
        case SWQ_NE: return cmpRes != 0;
        // case SWQ_EQ: return cmpRes == 0;
        case SWQ_GE: return cmpRes <= 0;
        case SWQ_GT: return cmpRes < 0;
            break;
        default: CPLAssert(false);
    }
    return true;
}

inline bool ConstraintEvaluator(const OGRArrowLayer::Constraint& constraint,
                                const StringView& value)
{
    return CompareStr(constraint.nOperation, value, constraint.osValue);
}

} // namespace


/************************************************************************/
/*                 SkipToNextFeatureDueToAttributeFilter()              */
/************************************************************************/

inline bool OGRArrowLayer::SkipToNextFeatureDueToAttributeFilter() const
{
    for( const auto& constraint: m_asAttributeFilterConstraints )
    {
        const arrow::Array* array = m_poBatchColumns[constraint.iArrayIdx].get();

        const bool bIsNull = array->IsNull(m_nIdxInBatch);
        if( constraint.nOperation == SWQ_ISNULL )
        {
            if( bIsNull )
            {
                continue;
            }
            return true;
        }
        else if( constraint.nOperation == SWQ_ISNOTNULL )
        {
            if( !bIsNull )
            {
                continue;
            }
            return true;
        }
        else if( bIsNull )
        {
            return true;
        }

        switch( array->type_id() )
        {
            case arrow::Type::NA:
                break;

            case arrow::Type::BOOL:
            {
                const auto castArray = static_cast<const arrow::BooleanArray*>(array);
                if(!ConstraintEvaluator(
                    constraint,
                    static_cast<int>(castArray->Value(m_nIdxInBatch))))
                {
                    return true;
                }
                break;
            }
            case arrow::Type::UINT8:
            {
                const auto castArray = static_cast<const arrow::UInt8Array*>(array);
                if(!ConstraintEvaluator(
                    constraint,
                    static_cast<int>(castArray->Value(m_nIdxInBatch))))
                {
                    return true;
                }
                break;
            }
            case arrow::Type::INT8:
            {
                const auto castArray = static_cast<const arrow::Int8Array*>(array);
                if(!ConstraintEvaluator(
                    constraint,
                    static_cast<int>(castArray->Value(m_nIdxInBatch))))
                {
                    return true;
                }
                break;
            }
            case arrow::Type::UINT16:
            {
                const auto castArray = static_cast<const arrow::UInt16Array*>(array);
                if(!ConstraintEvaluator(
                    constraint,
                    static_cast<int>(castArray->Value(m_nIdxInBatch))))
                {
                    return true;
                }
                break;
            }
            case arrow::Type::INT16:
            {
                const auto castArray = static_cast<const arrow::Int16Array*>(array);
                if(!ConstraintEvaluator(
                    constraint,
                    static_cast<int>(castArray->Value(m_nIdxInBatch))))
                {
                    return true;
                }
                break;
            }
            case arrow::Type::UINT32:
            {
                const auto castArray = static_cast<const arrow::UInt32Array*>(array);
                if(!ConstraintEvaluator(
                    constraint,
                    static_cast<GIntBig>(castArray->Value(m_nIdxInBatch))))
                {
                    return true;
                }
                break;
            }
            case arrow::Type::INT32:
            {
                const auto castArray = static_cast<const arrow::Int32Array*>(array);
                if(!ConstraintEvaluator(
                    constraint,
                    castArray->Value(m_nIdxInBatch)))
                {
                    return true;
                }
                break;
            }
            case arrow::Type::UINT64:
            {
                const auto castArray = static_cast<const arrow::UInt64Array*>(array);
                if(!ConstraintEvaluator(
                    constraint,
                    static_cast<double>(castArray->Value(m_nIdxInBatch))))
                {
                    return true;
                }
                break;
            }
            case arrow::Type::INT64:
            {
                const auto castArray = static_cast<const arrow::Int64Array*>(array);
                if(!ConstraintEvaluator(
                    constraint,
                    static_cast<GIntBig>(castArray->Value(m_nIdxInBatch))))
                {
                    return true;
                }
                break;
            }
            case arrow::Type::HALF_FLOAT:
            {
                const auto castArray = static_cast<const arrow::HalfFloatArray*>(array);
                if(!ConstraintEvaluator(
                    constraint,
                    static_cast<double>(castArray->Value(m_nIdxInBatch))))
                {
                    return true;
                }
                break;
            }
            case arrow::Type::FLOAT:
            {
                const auto castArray = static_cast<const arrow::FloatArray*>(array);
                if(!ConstraintEvaluator(
                    constraint,
                    static_cast<double>(castArray->Value(m_nIdxInBatch))))
                {
                    return true;
                }
                break;
            }
            case arrow::Type::DOUBLE:
            {
                const auto castArray = static_cast<const arrow::DoubleArray*>(array);
                if(!ConstraintEvaluator(
                    constraint,
                    castArray->Value(m_nIdxInBatch)))
                {
                    return true;
                }
                break;
            }
            case arrow::Type::STRING:
            {
                const auto castArray = static_cast<const arrow::StringArray*>(array);
                int out_length = 0;
                const uint8_t* data = castArray->GetValue(m_nIdxInBatch, &out_length);
                if(!ConstraintEvaluator(
                    constraint,
                    StringView(reinterpret_cast<const char*>(data), out_length)))
                {
                    return true;
                }
                break;
            }

            case arrow::Type::DECIMAL128:
            {
                const auto castArray = static_cast<const arrow::Decimal128Array*>(array);
                if(!ConstraintEvaluator(
                    constraint,
                    CPLAtof(castArray->FormatValue(m_nIdxInBatch).c_str())))
                {
                    return true;
                }
                break;
            }

            case arrow::Type::DECIMAL256:
            {
                const auto castArray = static_cast<const arrow::Decimal256Array*>(array);
                if(!ConstraintEvaluator(
                    constraint,
                    CPLAtof(castArray->FormatValue(m_nIdxInBatch).c_str())))
                {
                    return true;
                }
                break;
            }

            default:
                break;
        }
    }
    return false;
}

/************************************************************************/
/*                        GetNextRawFeature()                           */
/************************************************************************/

inline
OGRFeature* OGRArrowLayer::GetNextRawFeature()
{
    if( m_bEOF )
        return nullptr;

    if( m_poBatch == nullptr || m_nIdxInBatch == m_poBatch->num_rows() )
    {
        m_bEOF = !ReadNextBatch();
        if( m_bEOF )
            return nullptr;
    }

    // Evaluate spatial filter by computing the bounding box of each geometry
    // but without creating a OGRGeometry
    if( m_poFilterGeom )
    {
        int iCol;
        if( m_bIgnoredFields )
        {
            iCol = m_anMapGeomFieldIndexToArrayIndex[m_iGeomFieldFilter];
        }
        else
        {
            iCol = m_anMapGeomFieldIndexToArrowColumn[m_iGeomFieldFilter];
        }
        if( iCol >= 0 &&
            m_aeGeomEncoding[m_iGeomFieldFilter] == OGRArrowGeomEncoding::WKB )
        {
            auto array = m_poBatchColumns[iCol];
            CPLAssert( array->type_id() == arrow::Type::BINARY );
            auto castArray = std::static_pointer_cast<arrow::BinaryArray>(array);
            OGREnvelope sEnvelope;
            while( true )
            {
                bool bSkipToNextFeature = false;
                if( array->IsNull(m_nIdxInBatch) )
                {
                    bSkipToNextFeature = true;
                }
                else
                {
                    int out_length = 0;
                    const uint8_t* data = castArray->GetValue(m_nIdxInBatch, &out_length);
                    if( ReadWKBBoundingBox(data, out_length, sEnvelope) &&
                        !m_sFilterEnvelope.Intersects(sEnvelope) )
                    {
                        bSkipToNextFeature = true;
                    }
                }
                if( !bSkipToNextFeature )
                {
                    break;
                }
                if( !m_asAttributeFilterConstraints.empty() &&
                    !SkipToNextFeatureDueToAttributeFilter() )
                {
                    break;
                }

                m_nFeatureIdx ++;
                m_nIdxInBatch ++;
                if( m_nIdxInBatch == m_poBatch->num_rows() )
                {
                    m_bEOF = !ReadNextBatch();
                    if( m_bEOF )
                        return nullptr;
                    array = m_poBatchColumns[iCol];
                    CPLAssert( array->type_id() == arrow::Type::BINARY );
                    castArray = std::static_pointer_cast<arrow::BinaryArray>(array);
                }
            }
        }
        else if( iCol >= 0 &&
                 m_aeGeomEncoding[m_iGeomFieldFilter] == OGRArrowGeomEncoding::GEOARROW_MULTIPOLYGON )
        {
            const auto poGeomFieldDefn = m_poFeatureDefn->GetGeomFieldDefn(m_iGeomFieldFilter);
            const auto eGeomType = poGeomFieldDefn->GetType();
            const bool bHasZ = CPL_TO_BOOL(OGR_GT_HasZ(eGeomType));
            const bool bHasM = CPL_TO_BOOL(OGR_GT_HasM(eGeomType));
            const int nDim = 2 + (bHasZ ? 1 : 0) + (bHasM ? 1 : 0);

begin_multipolygon:
            auto array = m_poBatchColumns[iCol].get();
            CPLAssert( array->type_id() == arrow::Type::LIST );
            auto listOfPartsArray = static_cast<const arrow::ListArray*>(array);
            CPLAssert( listOfPartsArray->values()->type_id() == arrow::Type::LIST );
            auto listOfPartsValues = std::static_pointer_cast<arrow::ListArray>(listOfPartsArray->values());
            CPLAssert( listOfPartsValues->values()->type_id() == arrow::Type::LIST );
            auto listOfRingsValues = std::static_pointer_cast<arrow::ListArray>(listOfPartsValues->values());
            CPLAssert( listOfRingsValues->values()->type_id() == arrow::Type::FIXED_SIZE_LIST );
            auto listOfPointsValues = std::static_pointer_cast<arrow::FixedSizeListArray>(listOfRingsValues->values());
            CPLAssert( listOfPointsValues->values()->type_id() == arrow::Type::DOUBLE );
            auto pointValues = std::static_pointer_cast<arrow::DoubleArray>(listOfPointsValues->values());

            while( true )
            {
                if( !listOfPartsArray->IsNull(m_nIdxInBatch) )
                {
                    OGREnvelope sEnvelope;
                    const auto nParts = listOfPartsArray->value_length(m_nIdxInBatch);
                    const auto nPartOffset = listOfPartsArray->value_offset(m_nIdxInBatch);
                    for( auto j = decltype(nParts){0}; j < nParts; j++ )
                    {
                        const auto nRings = listOfPartsValues->value_length(nPartOffset + j);
                        const auto nRingOffset = listOfPartsValues->value_offset(nPartOffset + j);
                        if( nRings >= 1 )
                        {
                            const auto nPoints = listOfRingsValues->value_length(nRingOffset);
                            const auto nPointOffset = listOfRingsValues->value_offset(nRingOffset) * nDim;
                            const double* padfRawValue = pointValues->raw_values() + nPointOffset;
                            for( auto l = decltype(nPoints){0}; l < nPoints; ++l )
                            {
                                sEnvelope.Merge(
                                    padfRawValue[nDim * l],
                                    padfRawValue[nDim * l + 1]);
                            }
                            // for bounding box, only the first ring matters
                        }
                    }

                    if( nParts != 0 &&
                        m_sFilterEnvelope.Intersects(sEnvelope) )
                    {
                        break;
                    }
                }
                if( !m_asAttributeFilterConstraints.empty() &&
                    !SkipToNextFeatureDueToAttributeFilter() )
                {
                    break;
                }

                m_nFeatureIdx ++;
                m_nIdxInBatch ++;
                if( m_nIdxInBatch == m_poBatch->num_rows() )
                {
                    m_bEOF = !ReadNextBatch();
                    if( m_bEOF )
                        return nullptr;
                    goto begin_multipolygon;
                }
            }
        }
        else if( iCol >= 0 )
        {
            auto array = m_poBatchColumns[iCol].get();
            OGREnvelope sEnvelope;
            while( true )
            {
                bool bSkipToNextFeature = false;
                auto poGeometry = std::unique_ptr<OGRGeometry>(
                    ReadGeometry(m_iGeomFieldFilter, array, m_nIdxInBatch));
                if( poGeometry == nullptr ||
                    poGeometry->IsEmpty() )
                {
                    bSkipToNextFeature = true;
                }
                else
                {
                    poGeometry->getEnvelope(&sEnvelope);
                    if( !m_sFilterEnvelope.Intersects(sEnvelope) )
                    {
                        bSkipToNextFeature = true;
                    }
                }
                if( !bSkipToNextFeature )
                {
                    break;
                }
                if( !m_asAttributeFilterConstraints.empty() &&
                    !SkipToNextFeatureDueToAttributeFilter() )
                {
                    break;
                }

                m_nFeatureIdx ++;
                m_nIdxInBatch ++;
                if( m_nIdxInBatch == m_poBatch->num_rows() )
                {
                    m_bEOF = !ReadNextBatch();
                    if( m_bEOF )
                        return nullptr;
                    array = m_poBatchColumns[iCol].get();
                }
            }
        }
    }

    else if( !m_asAttributeFilterConstraints.empty() )
    {
        while( true )
        {
            if( !SkipToNextFeatureDueToAttributeFilter() )
            {
                break;
            }

            m_nFeatureIdx ++;
            m_nIdxInBatch ++;
            if( m_nIdxInBatch == m_poBatch->num_rows() )
            {
                m_bEOF = !ReadNextBatch();
                if( m_bEOF )
                    return nullptr;
            }
        }
    }

    auto poFeature = ReadFeature(m_nIdxInBatch, m_poBatchColumns);

    if( m_iFIDArrowColumn < 0 )
        poFeature->SetFID(m_nFeatureIdx);

    m_nFeatureIdx ++;
    m_nIdxInBatch ++;

    return poFeature;
}

/************************************************************************/
/*                            GetExtent()                               */
/************************************************************************/

inline
OGRErr OGRArrowLayer::GetExtent(OGREnvelope *psExtent, int bForce)
{
    return GetExtent(0, psExtent, bForce);
}

/************************************************************************/
/*                            GetExtent()                               */
/************************************************************************/

inline
OGRErr OGRArrowLayer::GetExtent(int iGeomField, OGREnvelope *psExtent,
                                  int bForce)
{
    if( iGeomField < 0 || iGeomField >= m_poFeatureDefn->GetGeomFieldCount() )
    {
        if( iGeomField != 0 )
        {
            CPLError(CE_Failure, CPLE_AppDefined,
                     "Invalid geometry field index : %d", iGeomField);
        }
        return OGRERR_FAILURE;
    }
    auto oIter = m_oMapGeometryColumns.find(
        m_poFeatureDefn->GetGeomFieldDefn(iGeomField)->GetNameRef() );
    if( oIter != m_oMapGeometryColumns.end() &&
        CPLTestBool(CPLGetConfigOption(("OGR_" + GetDriverUCName() + "_USE_BBOX").c_str(), "YES")) )
    {
        const auto& oJSONDef = oIter->second;
        const auto oBBox = oJSONDef.GetArray("bbox");
        if( oBBox.IsValid() && oBBox.Size() == 4 )
        {
            psExtent->MinX = oBBox[0].ToDouble();
            psExtent->MinY = oBBox[1].ToDouble();
            psExtent->MaxX = oBBox[2].ToDouble();
            psExtent->MaxY = oBBox[3].ToDouble();
            if( psExtent->MinX <= psExtent->MaxX )
                return OGRERR_NONE;
        }
        else if( oBBox.IsValid() && oBBox.Size() == 6 )
        {
            psExtent->MinX = oBBox[0].ToDouble();
            psExtent->MinY = oBBox[1].ToDouble();
            // MinZ skipped
            psExtent->MaxX = oBBox[3].ToDouble();
            psExtent->MaxY = oBBox[4].ToDouble();
            // MaxZ skipped
            if( psExtent->MinX <= psExtent->MaxX )
                return OGRERR_NONE;
        }
    }

    if( !bForce && !CanRunNonForcedGetExtent() )
    {
        return OGRERR_FAILURE;
    }

    int iCol;
    if( m_bIgnoredFields )
    {
        iCol = m_anMapGeomFieldIndexToArrayIndex[iGeomField];
    }
    else
    {
        iCol = m_anMapGeomFieldIndexToArrowColumn[iGeomField];
    }
    if( iCol< 0 )
    {
        return OGRERR_FAILURE;
    }

    if( m_aeGeomEncoding[iGeomField] == OGRArrowGeomEncoding::WKB )
    {
        ResetReading();
        if( m_poBatch == nullptr )
        {
            m_bEOF = !ReadNextBatch();
            if( m_bEOF )
                return OGRERR_FAILURE;
        }
        *psExtent = OGREnvelope();

        auto array = m_poBatchColumns[iCol];
        CPLAssert( array->type_id() == arrow::Type::BINARY );
        auto castArray = std::static_pointer_cast<arrow::BinaryArray>(array);
        OGREnvelope sEnvelope;
        while( true )
        {
            if( !array->IsNull(m_nIdxInBatch) )
            {
                int out_length = 0;
                const uint8_t* data = castArray->GetValue(m_nIdxInBatch, &out_length);
                if( ReadWKBBoundingBox(data, out_length, sEnvelope) )
                {
                    psExtent->Merge(sEnvelope);
                }
            }

            m_nFeatureIdx ++;
            m_nIdxInBatch ++;
            if( m_nIdxInBatch == m_poBatch->num_rows() )
            {
                m_bEOF = !ReadNextBatch();
                if( m_bEOF )
                {
                    ResetReading();
                    return psExtent->IsInit() ? OGRERR_NONE : OGRERR_FAILURE;
                }
                array = m_poBatchColumns[iCol];
                CPLAssert( array->type_id() == arrow::Type::BINARY );
                castArray = std::static_pointer_cast<arrow::BinaryArray>(array);
            }
        }
    }
    else if(  m_aeGeomEncoding[iGeomField] == OGRArrowGeomEncoding::GEOARROW_MULTIPOLYGON )
    {
        ResetReading();
        if( m_poBatch == nullptr )
        {
            m_bEOF = !ReadNextBatch();
            if( m_bEOF )
                return OGRERR_FAILURE;
        }
        *psExtent = OGREnvelope();

        const auto poGeomFieldDefn = m_poFeatureDefn->GetGeomFieldDefn(iGeomField);
        const auto eGeomType = poGeomFieldDefn->GetType();
        const bool bHasZ = CPL_TO_BOOL(OGR_GT_HasZ(eGeomType));
        const bool bHasM = CPL_TO_BOOL(OGR_GT_HasM(eGeomType));
        const int nDim = 2 + (bHasZ ? 1 : 0) + (bHasM ? 1 : 0);

begin_multipolygon:
        auto array = m_poBatchColumns[iCol].get();
        CPLAssert( array->type_id() == arrow::Type::LIST );
        auto listOfPartsArray = static_cast<const arrow::ListArray*>(array);
        CPLAssert( listOfPartsArray->values()->type_id() == arrow::Type::LIST );
        auto listOfPartsValues = std::static_pointer_cast<arrow::ListArray>(listOfPartsArray->values());
        CPLAssert( listOfPartsValues->values()->type_id() == arrow::Type::LIST );
        auto listOfRingsValues = std::static_pointer_cast<arrow::ListArray>(listOfPartsValues->values());
        CPLAssert( listOfRingsValues->values()->type_id() == arrow::Type::FIXED_SIZE_LIST );
        auto listOfPointsValues = std::static_pointer_cast<arrow::FixedSizeListArray>(listOfRingsValues->values());
        CPLAssert( listOfPointsValues->values()->type_id() == arrow::Type::DOUBLE );
        auto pointValues = std::static_pointer_cast<arrow::DoubleArray>(listOfPointsValues->values());

        while( true )
        {
            if( !listOfPartsArray->IsNull(m_nIdxInBatch) )
            {
                const auto nParts = listOfPartsArray->value_length(m_nIdxInBatch);
                const auto nPartOffset = listOfPartsArray->value_offset(m_nIdxInBatch);
                for( auto j = decltype(nParts){0}; j < nParts; j++ )
                {
                    const auto nRings = listOfPartsValues->value_length(nPartOffset + j);
                    const auto nRingOffset = listOfPartsValues->value_offset(nPartOffset + j);
                    if( nRings >= 1 )
                    {
                        const auto nPoints = listOfRingsValues->value_length(nRingOffset);
                        const auto nPointOffset = listOfRingsValues->value_offset(nRingOffset) * nDim;
                        const double* padfRawValue = pointValues->raw_values() + nPointOffset;
                        for( auto l = decltype(nPoints){0}; l < nPoints; ++l )
                        {
                            psExtent->Merge(
                                padfRawValue[nDim * l],
                                padfRawValue[nDim * l + 1]);
                        }
                        // for bounding box, only the first ring matters
                    }
                }
            }

            m_nFeatureIdx ++;
            m_nIdxInBatch ++;
            if( m_nIdxInBatch == m_poBatch->num_rows() )
            {
                m_bEOF = !ReadNextBatch();
                if( m_bEOF )
                {
                    ResetReading();
                    return psExtent->IsInit() ? OGRERR_NONE : OGRERR_FAILURE;
                }
                goto begin_multipolygon;
            }
        }
    }

    return GetExtentInternal(iGeomField, psExtent, bForce);
}
