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ogrgeopackagetablelayer.cpp
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ogrgeopackagetablelayer.cpp
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/******************************************************************************
*
* Project: GeoPackage Translator
* Purpose: Implements OGRGeoPackageTableLayer class
* Author: Paul Ramsey <pramsey@boundlessgeo.com>
*
******************************************************************************
* Copyright (c) 2013, Paul Ramsey <pramsey@boundlessgeo.com>
* Copyright (c) 2014, Even Rouault <even dot rouault at spatialys.com>
*
* 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_geopackage.h"
#include "ogrgeopackageutility.h"
#include "ogrsqliteutility.h"
#include "cpl_md5.h"
#include "cpl_time.h"
#include "ogr_p.h"
#include <algorithm>
#include <cassert>
#include <cmath>
#include <limits>
#undef SQLITE_STATIC
#define SQLITE_STATIC static_cast<sqlite3_destructor_type>(nullptr)
#undef SQLITE_TRANSIENT
#define SQLITE_TRANSIENT reinterpret_cast<sqlite3_destructor_type>(-1)
static const char UNSUPPORTED_OP_READ_ONLY[] =
"%s : unsupported operation on a read-only datasource.";
//----------------------------------------------------------------------
// SaveExtent()
//
// Write the current contents of the layer envelope down to the
// gpkg_contents metadata table.
//
OGRErr OGRGeoPackageTableLayer::SaveExtent()
{
if ( !m_poDS->GetUpdate() || ! m_bExtentChanged || ! m_poExtent )
return OGRERR_NONE;
sqlite3* poDb = m_poDS->GetDB();
if ( ! poDb ) return OGRERR_FAILURE;
char *pszSQL = sqlite3_mprintf(
"UPDATE gpkg_contents SET "
"min_x = %.18g, min_y = %.18g, "
"max_x = %.18g, max_y = %.18g "
"WHERE lower(table_name) = lower('%q') AND "
"Lower(data_type) = 'features'",
m_poExtent->MinX, m_poExtent->MinY,
m_poExtent->MaxX, m_poExtent->MaxY,
m_pszTableName);
OGRErr err = SQLCommand(poDb, pszSQL);
sqlite3_free(pszSQL);
m_bExtentChanged = false;
return err;
}
//----------------------------------------------------------------------
// SaveTimestamp()
//
// Update the last_change column of the gpkg_contents metadata table.
//
OGRErr OGRGeoPackageTableLayer::SaveTimestamp()
{
if ( !m_poDS->GetUpdate() || !m_bContentChanged )
return OGRERR_NONE;
m_bContentChanged = false;
OGRErr err = m_poDS->UpdateGpkgContentsLastChange(m_pszTableName);
#ifdef ENABLE_GPKG_OGR_CONTENTS
if( m_bIsTable && err == OGRERR_NONE && m_poDS->m_bHasGPKGOGRContents &&
!m_bOGRFeatureCountTriggersEnabled && m_nTotalFeatureCount >= 0 )
{
CPLString osFeatureCount;
osFeatureCount.Printf(CPL_FRMT_GIB, m_nTotalFeatureCount);
char* pszSQL = sqlite3_mprintf(
"UPDATE gpkg_ogr_contents SET "
"feature_count = %s "
"WHERE lower(table_name) = lower('%q')",
osFeatureCount.c_str(),
m_pszTableName);
err = SQLCommand(m_poDS->GetDB(), pszSQL);
sqlite3_free(pszSQL);
}
#endif
return err;
}
//----------------------------------------------------------------------
// UpdateExtent()
//
// Expand the layer envelope if necessary to reflect the bounds
// of new features being added to the layer.
//
OGRErr OGRGeoPackageTableLayer::UpdateExtent( const OGREnvelope *poExtent )
{
if ( ! m_poExtent )
{
m_poExtent = new OGREnvelope( *poExtent );
}
m_poExtent->Merge( *poExtent );
m_bExtentChanged = true;
return OGRERR_NONE;
}
//----------------------------------------------------------------------
// BuildColumns()
//
// Save a list of columns (fid, geometry, attributes) suitable
// for use in a SELECT query that retrieves all fields.
//
OGRErr OGRGeoPackageTableLayer::BuildColumns()
{
CPLFree(panFieldOrdinals);
panFieldOrdinals = static_cast<int *>(CPLMalloc( sizeof(int) * m_poFeatureDefn->GetFieldCount() ));
int iCurCol = 0;
/* Always start with a primary key */
CPLString soColumns;
if( m_bIsTable || m_pszFidColumn != nullptr )
{
soColumns += "m.";
soColumns += m_pszFidColumn ?
"\"" + SQLEscapeName(m_pszFidColumn) + "\"" : "_rowid_";
iFIDCol = iCurCol;
iCurCol ++;
}
/* Add a geometry column if there is one (just one) */
if ( m_poFeatureDefn->GetGeomFieldCount() )
{
const auto poFieldDefn = m_poFeatureDefn->GetGeomFieldDefn(0);
if( poFieldDefn->IsIgnored() )
{
iGeomCol = -1;
}
else
{
if( !soColumns.empty() )
soColumns += ", ";
soColumns += "m.\"";
soColumns += SQLEscapeName(poFieldDefn->GetNameRef());
soColumns += "\"";
iGeomCol = iCurCol;
iCurCol ++;
}
}
/* Add all the attribute columns */
for( int i = 0; i < m_poFeatureDefn->GetFieldCount(); i++ )
{
const auto poFieldDefn = m_poFeatureDefn->GetFieldDefn(i);
if( poFieldDefn->IsIgnored() )
{
panFieldOrdinals[i] = -1;
}
else
{
if( !soColumns.empty() )
soColumns += ", ";
soColumns += "m.\"";
soColumns += SQLEscapeName(poFieldDefn->GetNameRef());
soColumns += "\"";
panFieldOrdinals[i] = iCurCol;
iCurCol ++;
}
}
m_soColumns = soColumns;
return OGRERR_NONE;
}
//----------------------------------------------------------------------
// IsGeomFieldSet()
//
// Utility method to determine if there is a non-Null geometry
// in an OGRGeometry.
//
bool OGRGeoPackageTableLayer::IsGeomFieldSet( OGRFeature *poFeature )
{
return
poFeature->GetDefnRef()->GetGeomFieldCount() &&
poFeature->GetGeomFieldRef(0);
}
#define MY_CPLAssert CPLAssert
OGRErr OGRGeoPackageTableLayer::FeatureBindParameters( OGRFeature *poFeature,
sqlite3_stmt *poStmt,
int *pnColCount,
bool bAddFID,
bool bBindUnsetFields )
{
OGRFeatureDefn *poFeatureDefn = poFeature->GetDefnRef();
int nColCount = 1;
int err = SQLITE_OK;
if( bAddFID )
{
err = sqlite3_bind_int64(poStmt, nColCount++, poFeature->GetFID());
MY_CPLAssert( err == SQLITE_OK );
}
/* Bind data values to the statement, here bind the blob for geometry */
if ( err == SQLITE_OK && poFeatureDefn->GetGeomFieldCount() )
{
// Non-NULL geometry.
OGRGeometry* poGeom = poFeature->GetGeomFieldRef(0);
if ( poGeom )
{
size_t szWkb = 0;
GByte* pabyWkb = GPkgGeometryFromOGR(poGeom, m_iSrs, &szWkb);
err = sqlite3_bind_blob(poStmt, nColCount++, pabyWkb,
static_cast<int>(szWkb), CPLFree);
MY_CPLAssert( err == SQLITE_OK );
CreateGeometryExtensionIfNecessary(poGeom);
}
/* NULL geometry */
else
{
err = sqlite3_bind_null(poStmt, nColCount++);
MY_CPLAssert( err == SQLITE_OK );
}
}
/* Bind the attributes using appropriate SQLite data types */
const int nFieldCount = poFeatureDefn->GetFieldCount();
size_t nInsertionBufferPos = 0;
if( m_osInsertionBuffer.empty() )
m_osInsertionBuffer.resize(OGR_SIZEOF_ISO8601_DATETIME_BUFFER * nFieldCount);
for( int i = 0;
err == SQLITE_OK && i < nFieldCount;
i++ )
{
if( i == m_iFIDAsRegularColumnIndex || m_abGeneratedColumns[i] )
continue;
if( !poFeature->IsFieldSet(i) )
{
if( bBindUnsetFields )
{
err = sqlite3_bind_null(poStmt, nColCount++);
MY_CPLAssert( err == SQLITE_OK );
}
continue;
}
const OGRFieldDefn *poFieldDefn = poFeatureDefn->GetFieldDefn(i);
if( !poFeature->IsFieldNull(i) )
{
switch(SQLiteFieldFromOGR(poFieldDefn->GetType()))
{
case SQLITE_INTEGER:
{
err = sqlite3_bind_int64(poStmt, nColCount++, poFeature->GetFieldAsInteger64(i));
break;
}
case SQLITE_FLOAT:
{
err = sqlite3_bind_double(poStmt, nColCount++, poFeature->GetFieldAsDouble(i));
break;
}
case SQLITE_BLOB:
{
int szBlob = 0;
GByte *pabyBlob = poFeature->GetFieldAsBinary(i, &szBlob);
err = sqlite3_bind_blob(poStmt, nColCount++, pabyBlob, szBlob, SQLITE_STATIC);
break;
}
default:
{
const char *pszVal = "";
int nValLengthBytes = -1;
sqlite3_destructor_type destructorType = SQLITE_TRANSIENT;
if( poFieldDefn->GetType() == OFTDate )
{
destructorType = SQLITE_STATIC;
const auto psFieldRaw = poFeature->GetRawFieldRef(i);
char* pszValEdit = &m_osInsertionBuffer[nInsertionBufferPos];
pszVal = pszValEdit;
if( psFieldRaw->Date.Year < 0 || psFieldRaw->Date.Year >= 10000 )
{
CPLError(CE_Failure, CPLE_AppDefined,
"OGRGetISO8601DateTime(): year %d unsupported ",
psFieldRaw->Date.Year);
nValLengthBytes = 0;
}
else
{
int nYear = psFieldRaw->Date.Year;
pszValEdit[3] = (nYear % 10) + '0';
nYear /= 10;
pszValEdit[2] = (nYear % 10) + '0';
nYear /= 10;
pszValEdit[1] = (nYear % 10) + '0';
nYear /= 10;
pszValEdit[0] = static_cast<char>(nYear /*% 10*/ + '0');
pszValEdit[4] = '-';
pszValEdit[5] = ((psFieldRaw->Date.Month / 10) % 10) + '0';
pszValEdit[6] = (psFieldRaw->Date.Month % 10) + '0';
pszValEdit[7] = '-';
pszValEdit[8] = ((psFieldRaw->Date.Day / 10) % 10) + '0';
pszValEdit[9] = (psFieldRaw->Date.Day % 10) + '0';
nValLengthBytes = 10;
nInsertionBufferPos += 10;
}
}
else if( poFieldDefn->GetType() == OFTDateTime )
{
destructorType = SQLITE_STATIC;
constexpr bool bAlwaysMillisecond = true;
const auto psFieldRaw = poFeature->GetRawFieldRef(i);
char* pszValEdit = &m_osInsertionBuffer[nInsertionBufferPos];
pszVal = pszValEdit;
if( m_poDS->m_bDateTimeWithTZ || psFieldRaw->Date.TZFlag == 100 )
{
nValLengthBytes = OGRGetISO8601DateTime(psFieldRaw, bAlwaysMillisecond, pszValEdit);
}
else
{
OGRField sField(*psFieldRaw);
if( sField.Date.TZFlag == 0 || sField.Date.TZFlag == 1 )
{
sField.Date.TZFlag = 100;
}
else
{
struct tm brokendowntime;
brokendowntime.tm_year = sField.Date.Year - 1900;
brokendowntime.tm_mon = sField.Date.Month -1;
brokendowntime.tm_mday = sField.Date.Day;
brokendowntime.tm_hour = sField.Date.Hour;
brokendowntime.tm_min = sField.Date.Minute;
brokendowntime.tm_sec = 0;
GIntBig nDT = CPLYMDHMSToUnixTime(&brokendowntime);
const int TZOffset = std::abs(sField.Date.TZFlag - 100) * 15;
nDT -= TZOffset * 60;
CPLUnixTimeToYMDHMS(nDT, &brokendowntime);
sField.Date.Year = static_cast<GInt16>(brokendowntime.tm_year + 1900);
sField.Date.Month = static_cast<GByte>(brokendowntime.tm_mon + 1);
sField.Date.Day = static_cast<GByte>(brokendowntime.tm_mday);
sField.Date.Hour = static_cast<GByte>(brokendowntime.tm_hour);
sField.Date.Minute = static_cast<GByte>(brokendowntime.tm_min);
sField.Date.TZFlag = 100;
}
nValLengthBytes = OGRGetISO8601DateTime(&sField, bAlwaysMillisecond, pszValEdit);
}
nInsertionBufferPos += nValLengthBytes;
}
else if( poFieldDefn->GetType() == OFTString )
{
pszVal = poFeature->GetFieldAsString(i);
if( poFieldDefn->GetWidth() > 0 )
{
if( !CPLIsUTF8(pszVal, -1) )
{
CPLError(CE_Warning, CPLE_AppDefined,
"Value of field '%s' is not a valid UTF-8 string.%s",
poFeatureDefn->GetFieldDefn(i)->GetNameRef(),
m_bTruncateFields ? " Value will be laundered." : "");
if( m_bTruncateFields )
{
pszVal = CPLForceToASCII(pszVal, -1, '_');
destructorType = CPLFree;
}
}
if( CPLStrlenUTF8(pszVal) > poFieldDefn->GetWidth() )
{
CPLError(CE_Warning, CPLE_AppDefined,
"Value of field '%s' has %d characters, whereas maximum allowed is %d.%s",
poFeatureDefn->GetFieldDefn(i)->GetNameRef(),
CPLStrlenUTF8(pszVal),
poFieldDefn->GetWidth(),
m_bTruncateFields ? " Value will be truncated." : "");
if( m_bTruncateFields )
{
int countUTF8Chars = 0;
nValLengthBytes = 0;
while (pszVal[nValLengthBytes])
{
if ((pszVal[nValLengthBytes] & 0xc0) != 0x80)
{
// Stop at the start of the character just beyond the maximum accepted
if( countUTF8Chars == poFieldDefn->GetWidth() )
break;
countUTF8Chars++;
}
nValLengthBytes++;
}
}
}
}
else
{
destructorType = SQLITE_STATIC;
}
}
else
{
pszVal = poFeature->GetFieldAsString(i);
}
err = sqlite3_bind_text(poStmt, nColCount++, pszVal, nValLengthBytes, destructorType);
break;
}
}
}
else
{
err = sqlite3_bind_null(poStmt, nColCount++);
}
if( err != SQLITE_OK )
{
CPLError(CE_Failure, CPLE_AppDefined,
"sqlite3_bind_() for column %s failed: %s",
poFieldDefn->GetNameRef(),
sqlite3_errmsg(m_poDS->GetDB()));
}
}
if( pnColCount != nullptr )
*pnColCount = nColCount;
return (err == SQLITE_OK) ? OGRERR_NONE : OGRERR_FAILURE;
}
//----------------------------------------------------------------------
// FeatureBindUpdateParameters()
//
// Selectively bind the values of an OGRFeature to a prepared
// statement, prior to execution. Carefully binds exactly the
// same parameters that have been set up by FeatureGenerateUpdateSQL()
// as bindable.
//
OGRErr OGRGeoPackageTableLayer::FeatureBindUpdateParameters( OGRFeature *poFeature, sqlite3_stmt *poStmt )
{
int nColCount = 0;
const OGRErr err =
FeatureBindParameters( poFeature, poStmt, &nColCount, false, false );
if ( err != OGRERR_NONE )
return err;
// Bind the FID to the "WHERE" clause.
const int sqlite_err =
sqlite3_bind_int64(poStmt, nColCount, poFeature->GetFID());
if ( sqlite_err != SQLITE_OK )
{
CPLError( CE_Failure, CPLE_AppDefined,
"failed to bind FID '" CPL_FRMT_GIB "' to statement", poFeature->GetFID());
return OGRERR_FAILURE;
}
return OGRERR_NONE;
}
//----------------------------------------------------------------------
// FeatureBindInsertParameters()
//
// Selectively bind the values of an OGRFeature to a prepared
// statement, prior to execution. Carefully binds exactly the
// same parameters that have been set up by FeatureGenerateInsertSQL()
// as bindable.
//
OGRErr OGRGeoPackageTableLayer::FeatureBindInsertParameters( OGRFeature *poFeature,
sqlite3_stmt *poStmt,
bool bAddFID,
bool bBindUnsetFields )
{
return FeatureBindParameters( poFeature, poStmt, nullptr, bAddFID, bBindUnsetFields );
}
//----------------------------------------------------------------------
// FeatureGenerateInsertSQL()
//
// Build a SQL INSERT statement that references all the columns in
// the OGRFeatureDefn, then prepare it for repeated use in a prepared
// statement. All statements start off with geometry (if it exists)
// then reference each column in the order it appears in the OGRFeatureDefn.
// FeatureBindParameters operates on the expectation of this
// column ordering.
//
CPLString OGRGeoPackageTableLayer::FeatureGenerateInsertSQL( OGRFeature *poFeature,
bool bAddFID,
bool bBindUnsetFields,
bool bUpsert,
const std::string& osUpsertUniqueColumnName )
{
bool bNeedComma = false;
OGRFeatureDefn *poFeatureDefn = poFeature->GetDefnRef();
if( poFeatureDefn->GetFieldCount() == ((m_iFIDAsRegularColumnIndex >= 0) ? 1 : 0) &&
poFeatureDefn->GetGeomFieldCount() == 0 &&
!bAddFID )
return CPLSPrintf("INSERT INTO \"%s\" DEFAULT VALUES",
SQLEscapeName(m_pszTableName).c_str());
/* Set up our SQL string basics */
CPLString osSQLFront("INSERT");
if( bUpsert && osUpsertUniqueColumnName.empty() )
osSQLFront += " OR REPLACE";
osSQLFront += CPLSPrintf(" INTO \"%s\" ( ",
SQLEscapeName(m_pszTableName).c_str());
CPLString osSQLBack;
osSQLBack = ") VALUES (";
CPLString osSQLColumn;
if( bAddFID )
{
osSQLColumn.Printf("\"%s\"", SQLEscapeName(GetFIDColumn()).c_str());
osSQLFront += osSQLColumn;
osSQLBack += "?";
bNeedComma = true;
}
if ( poFeatureDefn->GetGeomFieldCount() )
{
if( bNeedComma )
{
osSQLFront += ", ";
osSQLBack += ", ";
}
osSQLColumn.Printf("\"%s\"", SQLEscapeName(poFeatureDefn->GetGeomFieldDefn(0)->GetNameRef()).c_str());
osSQLFront += osSQLColumn;
osSQLBack += "?";
bNeedComma = true;
}
/* Add attribute column names (except FID) to the SQL */
for( int i = 0; i < poFeatureDefn->GetFieldCount(); i++ )
{
if( i == m_iFIDAsRegularColumnIndex || m_abGeneratedColumns[i] )
continue;
if( !bBindUnsetFields && !poFeature->IsFieldSet(i) )
continue;
if( !bNeedComma )
{
bNeedComma = true;
}
else
{
osSQLFront += ", ";
osSQLBack += ", ";
}
osSQLColumn.Printf("\"%s\"",
SQLEscapeName(poFeatureDefn->GetFieldDefn(i)->GetNameRef()).c_str());
osSQLFront += osSQLColumn;
osSQLBack += "?";
}
osSQLBack += ")";
if( !bNeedComma )
return CPLSPrintf("INSERT INTO \"%s\" DEFAULT VALUES",
SQLEscapeName(m_pszTableName).c_str());
if( bUpsert && !osUpsertUniqueColumnName.empty() )
{
osSQLBack += " ON CONFLICT ";
#if SQLITE_VERSION_NUMBER < 3035000L
osSQLBack += "(\"";
osSQLBack += SQLEscapeName(osUpsertUniqueColumnName.c_str());
osSQLBack += "\") ";
#endif
osSQLBack += "DO UPDATE SET ";
bNeedComma = false;
if ( poFeatureDefn->GetGeomFieldCount() )
{
osSQLBack += CPLSPrintf("\"%s\" = excluded.\"%s\"",
SQLEscapeName(poFeatureDefn->GetGeomFieldDefn(0)->GetNameRef()).c_str(),
SQLEscapeName(poFeatureDefn->GetGeomFieldDefn(0)->GetNameRef()).c_str());
bNeedComma = true;
}
for( int i = 0; i < poFeatureDefn->GetFieldCount(); i++ )
{
if( i == m_iFIDAsRegularColumnIndex )
continue;
if( !bBindUnsetFields && !poFeature->IsFieldSet(i) )
continue;
if( !bNeedComma )
{
bNeedComma = true;
}
else
{
osSQLBack += ", ";
}
osSQLBack += CPLSPrintf("\"%s\" = excluded.\"%s\"",
SQLEscapeName(poFeatureDefn->GetFieldDefn(i)->GetNameRef()).c_str(),
SQLEscapeName(poFeatureDefn->GetFieldDefn(i)->GetNameRef()).c_str());
}
#if SQLITE_VERSION_NUMBER >= 3035000L
osSQLBack += " RETURNING \"";
osSQLBack += SQLEscapeName(GetFIDColumn()).c_str();
osSQLBack += "\"";
#endif
}
return osSQLFront + osSQLBack;
}
//----------------------------------------------------------------------
// FeatureGenerateUpdateSQL()
//
// Build a SQL UPDATE statement that references all the columns in
// the OGRFeatureDefn, then prepare it for repeated use in a prepared
// statement. All statements start off with geometry (if it exists)
// then reference each column in the order it appears in the OGRFeatureDefn.
// FeatureBindParameters operates on the expectation of this
// column ordering.
//
CPLString OGRGeoPackageTableLayer::FeatureGenerateUpdateSQL( OGRFeature *poFeature )
{
bool bNeedComma = false;
OGRFeatureDefn *poFeatureDefn = poFeature->GetDefnRef();
/* Set up our SQL string basics */
CPLString osUpdate;
osUpdate.Printf("UPDATE \"%s\" SET ",
SQLEscapeName(m_pszTableName).c_str());
CPLString osSQLColumn;
if ( poFeatureDefn->GetGeomFieldCount() > 0 )
{
osSQLColumn.Printf("\"%s\"",
SQLEscapeName(poFeatureDefn->GetGeomFieldDefn(0)->GetNameRef()).c_str());
osUpdate += osSQLColumn;
osUpdate += "=?";
bNeedComma = true;
}
/* Add attribute column names (except FID) to the SQL */
for( int i = 0; i < poFeatureDefn->GetFieldCount(); i++ )
{
if( i == m_iFIDAsRegularColumnIndex || m_abGeneratedColumns[i] )
continue;
if( !poFeature->IsFieldSet(i) )
continue;
if( !bNeedComma )
bNeedComma = true;
else
osUpdate += ", ";
osSQLColumn.Printf("\"%s\"",
SQLEscapeName(poFeatureDefn->GetFieldDefn(i)->GetNameRef()).c_str());
osUpdate += osSQLColumn;
osUpdate += "=?";
}
if( !bNeedComma )
return CPLString();
CPLString osWhere;
osWhere.Printf(" WHERE \"%s\" = ?",
SQLEscapeName(m_pszFidColumn).c_str());
return osUpdate + osWhere;
}
/************************************************************************/
/* GetLayerDefn() */
/************************************************************************/
OGRFeatureDefn* OGRGeoPackageTableLayer::GetLayerDefn()
{
if( !m_bFeatureDefnCompleted )
{
m_bFeatureDefnCompleted = true;
ReadTableDefinition();
}
return m_poFeatureDefn;
}
/************************************************************************/
/* GetFIDColumn() */
/************************************************************************/
const char* OGRGeoPackageTableLayer::GetFIDColumn()
{
if( !m_bFeatureDefnCompleted )
GetLayerDefn();
return OGRGeoPackageLayer::GetFIDColumn();
}
/************************************************************************/
/* GetGeomType() */
/************************************************************************/
OGRwkbGeometryType OGRGeoPackageTableLayer::GetGeomType()
{
return m_poFeatureDefn->GetGeomType();
}
/************************************************************************/
/* GetGeometryColumn() */
/************************************************************************/
const char *OGRGeoPackageTableLayer::GetGeometryColumn()
{
if( m_poFeatureDefn->GetGeomFieldCount() > 0 )
return m_poFeatureDefn->GetGeomFieldDefn(0)->GetNameRef();
else
return "";
}
//----------------------------------------------------------------------
// ReadTableDefinition()
//
// Initialization routine. Read all the metadata about a table,
// starting from just the table name. Reads information from GPKG
// metadata tables and from SQLite table metadata. Uses it to
// populate OGRSpatialReference information and OGRFeatureDefn objects,
// among others.
//
OGRErr OGRGeoPackageTableLayer::ReadTableDefinition()
{
bool bReadExtent = false;
sqlite3* poDb = m_poDS->GetDB();
OGREnvelope oExtent;
CPLString osGeomColumnName;
CPLString osGeomColsType;
bool bHasZ = false;
bool bHasM = false;
#ifdef ENABLE_GPKG_OGR_CONTENTS
if( m_poDS->m_bHasGPKGOGRContents )
{
CPLString osTrigger1Name(
CPLSPrintf("trigger_insert_feature_count_%s", m_pszTableName));
CPLString osTrigger2Name(
CPLSPrintf("trigger_delete_feature_count_%s", m_pszTableName));
const std::map<CPLString, CPLString>& oMap =
m_poDS->GetNameTypeMapFromSQliteMaster();
if( oMap.find( osTrigger1Name.toupper() ) != oMap.end() &&
oMap.find( osTrigger2Name.toupper() ) != oMap.end() )
{
m_bOGRFeatureCountTriggersEnabled = true;
}
else if( m_bIsTable )
{
CPLDebug("GPKG", "Insert/delete feature_count triggers "
"missing on %s", m_pszTableName);
}
}
#endif
if( m_bIsInGpkgContents )
{
/* Check that the table name is registered in gpkg_contents */
const std::map< CPLString, GPKGContentsDesc >& oMapContents =
m_poDS->GetContents();
std::map< CPLString, GPKGContentsDesc >::const_iterator
oIterContents = oMapContents.find(
CPLString(m_pszTableName).toupper() );
if( oIterContents == oMapContents.end() )
{
CPLError( CE_Failure, CPLE_AppDefined,
"layer '%s' is not registered in gpkg_contents",
m_pszTableName );
return OGRERR_FAILURE;
}
const GPKGContentsDesc& oContents = oIterContents->second;
const char* pszIdentifier = oContents.osIdentifier.c_str();
if( pszIdentifier[0] != 0 && strcmp(pszIdentifier, m_pszTableName) != 0 )
OGRLayer::SetMetadataItem("IDENTIFIER", pszIdentifier);
const char* pszDescription = oContents.osDescription.c_str();
if( pszDescription[0] )
OGRLayer::SetMetadataItem("DESCRIPTION", pszDescription);
#ifdef ENABLE_GPKG_OGR_CONTENTS
if( m_poDS->m_bHasGPKGOGRContents )
{
char* pszSQL = sqlite3_mprintf(
"SELECT feature_count "
"FROM gpkg_ogr_contents "
"WHERE table_name = '%q'"
#ifdef WORKAROUND_SQLITE3_BUGS
" OR 0"
#endif
" LIMIT 2"
, m_pszTableName);
auto oResultFeatureCount = SQLQuery(poDb, pszSQL);
sqlite3_free(pszSQL);
if( oResultFeatureCount && oResultFeatureCount->RowCount() == 0 )
{
pszSQL = sqlite3_mprintf(
"SELECT feature_count "
"FROM gpkg_ogr_contents "
"WHERE lower(table_name) = lower('%q')"
#ifdef WORKAROUND_SQLITE3_BUGS
" OR 0"
#endif
" LIMIT 2"
, m_pszTableName);
oResultFeatureCount = SQLQuery(poDb, pszSQL);
sqlite3_free(pszSQL);
}
if( oResultFeatureCount && oResultFeatureCount->RowCount() == 1 )
{
const char* pszFeatureCount =
oResultFeatureCount->GetValue(0, 0);
if( pszFeatureCount )
{
m_nTotalFeatureCount = CPLAtoGIntBig(pszFeatureCount);
}
}
}
#endif
if( m_bIsSpatial )
{
/* All the extrema have to be non-NULL for this to make sense */
if ( !oContents.osMinX.empty() &&
!oContents.osMinY.empty() &&
!oContents.osMaxX.empty() &&
!oContents.osMaxY.empty() )
{
oExtent.MinX = CPLAtof(oContents.osMinX);
oExtent.MinY = CPLAtof(oContents.osMinY);
oExtent.MaxX = CPLAtof(oContents.osMaxX);
oExtent.MaxY = CPLAtof(oContents.osMaxY);
bReadExtent = oExtent.MinX <= oExtent.MaxX &&
oExtent.MinY <= oExtent.MaxY;
}
/* Check that the table name is registered in gpkg_geometry_columns */
char* pszSQL = sqlite3_mprintf(
"SELECT table_name, column_name, "
"geometry_type_name, srs_id, z, m "
"FROM gpkg_geometry_columns "
"WHERE table_name = '%q'"
#ifdef WORKAROUND_SQLITE3_BUGS
" OR 0"
#endif
" LIMIT 2"
,m_pszTableName);
auto oResultGeomCols = SQLQuery(poDb, pszSQL);
sqlite3_free(pszSQL);
if( oResultGeomCols && oResultGeomCols->RowCount() == 0 )
{
pszSQL = sqlite3_mprintf(
"SELECT table_name, column_name, "
"geometry_type_name, srs_id, z, m "
"FROM gpkg_geometry_columns "
"WHERE lower(table_name) = lower('%q')"
#ifdef WORKAROUND_SQLITE3_BUGS
" OR 0"
#endif
" LIMIT 2"
,m_pszTableName);
oResultGeomCols = SQLQuery(poDb, pszSQL);
sqlite3_free(pszSQL);
}
/* gpkg_geometry_columns query has to work */
/* gpkg_geometry_columns.table_name is supposed to be unique */
if ( !oResultGeomCols || oResultGeomCols->RowCount() != 1 )
{
if ( oResultGeomCols )
CPLError( CE_Failure, CPLE_AppDefined, "layer '%s' is not registered in gpkg_geometry_columns", m_pszTableName );
return OGRERR_FAILURE;
}
const char* pszGeomColName = oResultGeomCols->GetValue(1, 0);
if( pszGeomColName != nullptr )
osGeomColumnName = pszGeomColName;
const char* pszGeomColsType = oResultGeomCols->GetValue(2, 0);
if( pszGeomColsType != nullptr )
osGeomColsType = pszGeomColsType;
m_iSrs = oResultGeomCols->GetValueAsInteger(3, 0);
m_nZFlag = oResultGeomCols->GetValueAsInteger(4, 0);
m_nMFlag = oResultGeomCols->GetValueAsInteger(5, 0);
if( !(EQUAL(osGeomColsType, "GEOMETRY") && m_nZFlag == 2) )
{
bHasZ = CPL_TO_BOOL(m_nZFlag);
bHasM = CPL_TO_BOOL(m_nMFlag);
}
}
}
// set names (in upper case) of fields with unique constraint
std::set<std::string> uniqueFieldsUC;
if( m_bIsTable )
{
uniqueFieldsUC = SQLGetUniqueFieldUCConstraints(poDb, m_pszTableName);
}
/* Use the "PRAGMA TABLE_INFO()" call to get table definition */
/* #|name|type|notnull|default|pk */
/* 0|id|integer|0||1 */
/* 1|name|varchar|0||0 */
#if SQLITE_VERSION_NUMBER >= 3026000L
// SQLite 3.26 or later has table_xinfo() with an extra column to indicate hidden layers
char* pszSQL = sqlite3_mprintf("pragma table_xinfo('%q')", m_pszTableName);
#else
char* pszSQL = sqlite3_mprintf("pragma table_info('%q')", m_pszTableName);
#endif
auto oResultTable = SQLQuery(poDb, pszSQL);
sqlite3_free(pszSQL);
if ( !oResultTable || oResultTable->RowCount() == 0 )
{
if (oResultTable)
CPLError( CE_Failure, CPLE_AppDefined, "Cannot find table %s", m_pszTableName );
return OGRERR_FAILURE;
}
/* Populate feature definition from table description */
// First pass to determine if we have a single PKID column
int nCountPKIDColumns = 0;
for ( int iRecord = 0; iRecord < oResultTable->RowCount(); iRecord++ )
{
int nPKIDIndex = oResultTable->GetValueAsInteger(5, iRecord);
if( nPKIDIndex > 0 )
nCountPKIDColumns ++;
}
if( nCountPKIDColumns > 1 )
{
CPLDebug("GPKG", "For table %s, multiple columns make "
"the primary key. Ignoring them",
m_pszTableName);
}
bool bHasPreexistingSingleGeomColumn = m_poFeatureDefn->GetGeomFieldCount() == 1;
m_abGeneratedColumns.resize(oResultTable->RowCount());
for ( int iRecord = 0; iRecord < oResultTable->RowCount(); iRecord++ )
{
const char *pszName = oResultTable->GetValue(1, iRecord);
std::string osType = oResultTable->GetValue(2, iRecord);
int bNotNull = oResultTable->GetValueAsInteger(3, iRecord);
const char* pszDefault = oResultTable->GetValue(4, iRecord);
int nPKIDIndex = oResultTable->GetValueAsInteger(5, iRecord);
#if SQLITE_VERSION_NUMBER >= 3026000L
int nHiddenValue = oResultTable->GetValueAsInteger(6, iRecord);
#endif
OGRFieldSubType eSubType = OFSTNone;
int nMaxWidth = 0;
OGRFieldType oType = static_cast<OGRFieldType>(OFTMaxType + 1);
// SQLite 3.31 has a " GENERATED ALWAYS" suffix in the type column,
// but more recent versions no longer have it.
bool bIsGenerated = false;
constexpr const char* GENERATED_ALWAYS_SUFFIX = " GENERATED ALWAYS";
if( osType.size() > strlen(GENERATED_ALWAYS_SUFFIX) &&
CPLString(osType).toupper().compare(
osType.size() - strlen(GENERATED_ALWAYS_SUFFIX),
strlen(GENERATED_ALWAYS_SUFFIX), GENERATED_ALWAYS_SUFFIX) == 0 )
{
bIsGenerated = true;
osType.resize(osType.size() - strlen(GENERATED_ALWAYS_SUFFIX));