static int FindBbox(CPLString in) {
size_t pos = in.ifind("&bbox=");
if (pos == std::string::npos)
return -1;
else
return (int)pos + 6;
}
OGRErr OGRSQLiteSelectLayer::GetExtent(OGREnvelope *psExtent, int bForce)
{
if (GetGeomType() == wkbNone)
return OGRERR_FAILURE;
/* Caching of extent by SQL string is interesting to speed-up the */
/* establishment of the WFS GetCapabilities document for a MapServer mapfile */
/* which has several layers, only differing by scale rules */
const OGREnvelope* psCachedExtent = poDS->GetEnvelopeFromSQL(osSQLBase);
if (psCachedExtent)
{
memcpy(psExtent, psCachedExtent, sizeof(*psCachedExtent));
return OGRERR_NONE;
}
CPLString osSQLCommand = osSQLBase;
/* ORDER BY are costly to evaluate and are not necessary to establish */
/* the layer extent. */
size_t nOrderByPos = osSQLCommand.ifind(" ORDER BY ");
if( osSQLCommand.ifind("SELECT ") == 0 &&
nOrderByPos != std::string::npos &&
osSQLCommand.ifind(" LIMIT ") == std::string::npos &&
osSQLCommand.ifind(" UNION ") == std::string::npos &&
osSQLCommand.ifind(" INTERSECT ") == std::string::npos &&
osSQLCommand.ifind(" EXCEPT ") == std::string::npos)
{
osSQLCommand.resize(nOrderByPos);
OGRLayer* poTmpLayer = poDS->ExecuteSQL(osSQLCommand.c_str(), NULL, NULL);
if (poTmpLayer)
{
OGRErr eErr = poTmpLayer->GetExtent(psExtent, bForce);
poDS->ReleaseResultSet(poTmpLayer);
return eErr;
}
}
OGRErr eErr = OGRSQLiteLayer::GetExtent(psExtent, bForce);
if (eErr == OGRERR_NONE && poDS->GetUpdate() == FALSE)
poDS->SetEnvelopeForSQL(osSQLBase, *psExtent);
return eErr;
}
OGRErr OGRSQLiteSelectLayerCommonBehaviour::GetExtent(int iGeomField, OGREnvelope *psExtent, int bForce)
{
if( iGeomField < 0 || iGeomField >= poLayer->GetLayerDefn()->GetGeomFieldCount() ||
poLayer->GetLayerDefn()->GetGeomFieldDefn(iGeomField)->GetType() == wkbNone )
{
if( iGeomField != 0 )
{
CPLError(CE_Failure, CPLE_AppDefined,
"Invalid geometry field index : %d", iGeomField);
}
return OGRERR_FAILURE;
}
/* Caching of extent by SQL string is interesting to speed-up the */
/* establishment of the WFS GetCapabilities document for a MapServer mapfile */
/* which has several layers, only differing by scale rules */
if( iGeomField == 0 )
{
const OGREnvelope* psCachedExtent = poDS->GetEnvelopeFromSQL(osSQLBase);
if (psCachedExtent)
{
memcpy(psExtent, psCachedExtent, sizeof(*psCachedExtent));
return OGRERR_NONE;
}
}
CPLString osSQLCommand = osSQLBase;
/* ORDER BY are costly to evaluate and are not necessary to establish */
/* the layer extent. */
size_t nOrderByPos = osSQLCommand.ifind(" ORDER BY ");
if( osSQLCommand.ifind("SELECT ") == 0 &&
osSQLCommand.ifind("SELECT ", 1) == std::string::npos && /* Ensure there's no sub SELECT that could confuse our heuristics */
nOrderByPos != std::string::npos &&
osSQLCommand.ifind(" LIMIT ") == std::string::npos &&
osSQLCommand.ifind(" UNION ") == std::string::npos &&
osSQLCommand.ifind(" INTERSECT ") == std::string::npos &&
osSQLCommand.ifind(" EXCEPT ") == std::string::npos)
{
osSQLCommand.resize(nOrderByPos);
OGRLayer* poTmpLayer = poDS->ExecuteSQL(osSQLCommand.c_str(), NULL, NULL);
if (poTmpLayer)
{
OGRErr eErr = poTmpLayer->GetExtent(iGeomField, psExtent, bForce);
poDS->ReleaseResultSet(poTmpLayer);
return eErr;
}
}
OGRErr eErr;
if( iGeomField == 0 )
eErr = poLayer->BaseGetExtent(psExtent, bForce);
else
eErr = poLayer->BaseGetExtent(iGeomField, psExtent, bForce);
if (iGeomField == 0 && eErr == OGRERR_NONE && poDS->GetUpdate() == FALSE)
poDS->SetEnvelopeForSQL(osSQLBase, *psExtent);
return eErr;
}
OGRLayer * OGRGeoPackageDataSource::ExecuteSQL( const char *pszSQLCommand,
OGRGeometry *poSpatialFilter,
const char *pszDialect )
{
if( EQUALN(pszSQLCommand, "SELECT ", 7) ||
(pszDialect != NULL && EQUAL(pszDialect,"OGRSQL")) )
return OGRDataSource::ExecuteSQL( pszSQLCommand,
poSpatialFilter,
pszDialect );
/* -------------------------------------------------------------------- */
/* Prepare statement. */
/* -------------------------------------------------------------------- */
int rc;
sqlite3_stmt *hSQLStmt = NULL;
CPLString osSQLCommand = pszSQLCommand;
#if 0
/* This will speed-up layer creation */
/* ORDER BY are costly to evaluate and are not necessary to establish */
/* the layer definition. */
int bUseStatementForGetNextFeature = TRUE;
int bEmptyLayer = FALSE;
if( osSQLCommand.ifind("SELECT ") == 0 &&
osSQLCommand.ifind(" UNION ") == std::string::npos &&
osSQLCommand.ifind(" INTERSECT ") == std::string::npos &&
osSQLCommand.ifind(" EXCEPT ") == std::string::npos )
{
size_t nOrderByPos = osSQLCommand.ifind(" ORDER BY ");
if( nOrderByPos != std::string::npos )
{
osSQLCommand.resize(nOrderByPos);
bUseStatementForGetNextFeature = FALSE;
}
}
#endif
rc = sqlite3_prepare( m_poDb, osSQLCommand.c_str(), osSQLCommand.size(),
&hSQLStmt, NULL );
if( rc != SQLITE_OK )
{
CPLError( CE_Failure, CPLE_AppDefined,
"In ExecuteSQL(): sqlite3_prepare(%s):\n %s",
pszSQLCommand, sqlite3_errmsg(m_poDb) );
if( hSQLStmt != NULL )
{
sqlite3_finalize( hSQLStmt );
}
return NULL;
}
/* -------------------------------------------------------------------- */
/* Do we get a resultset? */
/* -------------------------------------------------------------------- */
rc = sqlite3_step( hSQLStmt );
if( rc != SQLITE_ROW )
{
if ( rc != SQLITE_DONE )
{
CPLError( CE_Failure, CPLE_AppDefined,
"In ExecuteSQL(): sqlite3_step(%s):\n %s",
pszSQLCommand, sqlite3_errmsg(m_poDb) );
sqlite3_finalize( hSQLStmt );
return NULL;
}
if( EQUAL(pszSQLCommand, "VACUUM") )
{
sqlite3_finalize( hSQLStmt );
/* VACUUM rewrites the DB, so we need to reset the application id */
SetApplicationId();
return NULL;
}
if( EQUALN(pszSQLCommand, "ALTER TABLE ", strlen("ALTER TABLE ")) )
{
char **papszTokens = CSLTokenizeString( pszSQLCommand );
/* ALTER TABLE src_table RENAME TO dst_table */
if( CSLCount(papszTokens) == 6 && EQUAL(papszTokens[3], "RENAME") &&
EQUAL(papszTokens[4], "TO") )
{
const char* pszSrcTableName = papszTokens[2];
const char* pszDstTableName = papszTokens[5];
OGRLayer* poSrcLayer = GetLayerByName(pszSrcTableName);
if( poSrcLayer )
{
/* We also need to update GeoPackage metadata tables */
char* pszSQL;
pszSQL = sqlite3_mprintf(
"UPDATE gpkg_geometry_columns SET table_name = '%s' WHERE table_name = '%s'",
pszDstTableName, pszSrcTableName);
SQLCommand(m_poDb, pszSQL);
sqlite3_free(pszSQL);
pszSQL = sqlite3_mprintf(
"UPDATE gpkg_contents SET table_name = '%s' WHERE table_name = '%s'",
pszDstTableName, pszSrcTableName);
SQLCommand(m_poDb, pszSQL);
sqlite3_free(pszSQL);
}
}
CSLDestroy(papszTokens);
}
if( !EQUALN(pszSQLCommand, "SELECT ", 7) )
{
sqlite3_finalize( hSQLStmt );
return NULL;
}
#if 0
bUseStatementForGetNextFeature = FALSE;
bEmptyLayer = TRUE;
#endif
}
/* -------------------------------------------------------------------- */
/* Create layer. */
/* -------------------------------------------------------------------- */
#if 0
OGRSQLiteSelectLayer *poLayer = NULL;
CPLString osSQL = pszSQLCommand;
poLayer = new OGRGeopackageSelectLayer( this, osSQL, hSQLStmt,
bUseStatementForGetNextFeature, bEmptyLayer, TRUE );
if( poSpatialFilter != NULL )
poLayer->SetSpatialFilter( 0, poSpatialFilter );
return poLayer;
#else
return OGRDataSource::ExecuteSQL( pszSQLCommand,
poSpatialFilter,
pszDialect );
#endif
}
int ERSHdrNode::ParseChildren( VSILFILE * fp, int nRecLevel )
{
if( nRecLevel == 100 ) // arbitrary limit
{
CPLError(CE_Failure, CPLE_AppDefined,
"Too many recursion level while parsing .ers header");
return false;
}
while( true )
{
/* -------------------------------------------------------------------- */
/* Read the next line (or multi-line for bracketed value). */
/* -------------------------------------------------------------------- */
CPLString osLine;
if( !ReadLine( fp, osLine ) )
return FALSE;
/* -------------------------------------------------------------------- */
/* Got a Name=Value. */
/* -------------------------------------------------------------------- */
size_t iOff;
if( (iOff = osLine.find_first_of( '=' )) != std::string::npos )
{
CPLString osName = osLine.substr(0,iOff-1);
osName.Trim();
CPLString osValue = osLine.c_str() + iOff + 1;
osValue.Trim();
MakeSpace();
papszItemName[nItemCount] = CPLStrdup(osName);
papszItemValue[nItemCount] = CPLStrdup(osValue);
papoItemChild[nItemCount] = nullptr;
nItemCount++;
}
/* -------------------------------------------------------------------- */
/* Got a Begin for an object. */
/* -------------------------------------------------------------------- */
else if( (iOff = osLine.ifind( " Begin" )) != std::string::npos )
{
CPLString osName = osLine.substr(0,iOff);
osName.Trim();
MakeSpace();
papszItemName[nItemCount] = CPLStrdup(osName);
papszItemValue[nItemCount] = nullptr;
papoItemChild[nItemCount] = new ERSHdrNode();
nItemCount++;
if( !papoItemChild[nItemCount-1]->ParseChildren( fp, nRecLevel + 1 ) )
return FALSE;
}
/* -------------------------------------------------------------------- */
/* Got an End for our object. Well, at least we *assume* it */
/* must be for our object. */
/* -------------------------------------------------------------------- */
else if( osLine.ifind( " End" ) != std::string::npos )
{
return TRUE;
}
/* -------------------------------------------------------------------- */
/* Error? */
/* -------------------------------------------------------------------- */
else if( osLine.Trim().length() > 0 )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Unexpected line parsing .ecw:\n%s",
osLine.c_str() );
return FALSE;
}
}
}
OGRLayer * OGRSQLiteExecuteSQL( GDALDataset* poDS,
const char *pszStatement,
OGRGeometry *poSpatialFilter,
CPL_UNUSED const char *pszDialect )
{
char* pszTmpDBName = (char*) CPLMalloc(256);
snprintf(pszTmpDBName, 256, "/vsimem/ogr2sqlite/temp_%p.db", pszTmpDBName);
OGRSQLiteDataSource* poSQLiteDS = NULL;
int nRet;
int bSpatialiteDB = FALSE;
CPLString osOldVal;
const char* pszOldVal = CPLGetConfigOption("OGR_SQLITE_STATIC_VIRTUAL_OGR", NULL);
if( pszOldVal != NULL )
{
osOldVal = pszOldVal;
pszOldVal = osOldVal.c_str();
}
/* -------------------------------------------------------------------- */
/* Create in-memory sqlite/spatialite DB */
/* -------------------------------------------------------------------- */
#ifdef HAVE_SPATIALITE
/* -------------------------------------------------------------------- */
/* Creating an empty SpatiaLite DB (with spatial_ref_sys populated */
/* has a significant cost. So at the first attempt, let's make */
/* one and cache it for later use. */
/* -------------------------------------------------------------------- */
#if 1
static size_t nEmptyDBSize = 0;
static GByte* pabyEmptyDB = NULL;
{
static CPLMutex* hMutex = NULL;
CPLMutexHolder oMutexHolder(&hMutex);
static int bTried = FALSE;
if( !bTried &&
CPLTestBool(CPLGetConfigOption("OGR_SQLITE_DIALECT_USE_SPATIALITE", "YES")) )
{
bTried = TRUE;
char* pszCachedFilename = (char*) CPLMalloc(256);
snprintf(pszCachedFilename, 256, "/vsimem/ogr2sqlite/reference_%p.db",
pszCachedFilename);
char** papszOptions = CSLAddString(NULL, "SPATIALITE=YES");
OGRSQLiteDataSource* poCachedDS = new OGRSQLiteDataSource();
nRet = poCachedDS->Create( pszCachedFilename, papszOptions );
CSLDestroy(papszOptions);
papszOptions = NULL;
delete poCachedDS;
if( nRet )
{
/* Note: the reference file keeps the ownership of the data, so that */
/* it gets released with VSICleanupFileManager() */
vsi_l_offset nEmptyDBSizeLarge = 0;
pabyEmptyDB = VSIGetMemFileBuffer( pszCachedFilename, &nEmptyDBSizeLarge, FALSE );
nEmptyDBSize = static_cast<size_t>(nEmptyDBSizeLarge);
}
CPLFree( pszCachedFilename );
}
}
/* The following configuration option is useful mostly for debugging/testing */
if( pabyEmptyDB != NULL && CPLTestBool(CPLGetConfigOption("OGR_SQLITE_DIALECT_USE_SPATIALITE", "YES")) )
{
GByte* pabyEmptyDBClone = (GByte*)VSI_MALLOC_VERBOSE(nEmptyDBSize);
if( pabyEmptyDBClone == NULL )
{
CPLFree(pszTmpDBName);
return NULL;
}
memcpy(pabyEmptyDBClone, pabyEmptyDB, nEmptyDBSize);
VSIFCloseL(VSIFileFromMemBuffer( pszTmpDBName, pabyEmptyDBClone, nEmptyDBSize, TRUE ));
poSQLiteDS = new OGRSQLiteDataSource();
CPLSetThreadLocalConfigOption("OGR_SQLITE_STATIC_VIRTUAL_OGR", "NO");
nRet = poSQLiteDS->Open( pszTmpDBName, TRUE, NULL );
CPLSetThreadLocalConfigOption("OGR_SQLITE_STATIC_VIRTUAL_OGR", pszOldVal);
if( !nRet )
{
/* should not happen really ! */
delete poSQLiteDS;
VSIUnlink(pszTmpDBName);
CPLFree(pszTmpDBName);
return NULL;
}
bSpatialiteDB = TRUE;
}
#else
/* No caching version */
poSQLiteDS = new OGRSQLiteDataSource();
char** papszOptions = CSLAddString(NULL, "SPATIALITE=YES");
CPLSetThreadLocalConfigOption("OGR_SQLITE_STATIC_VIRTUAL_OGR", "NO");
nRet = poSQLiteDS->Create( pszTmpDBName, papszOptions );
CPLSetThreadLocalConfigOption("OGR_SQLITE_STATIC_VIRTUAL_OGR", pszOldVal);
CSLDestroy(papszOptions);
papszOptions = NULL;
if( nRet )
{
bSpatialiteDB = TRUE;
}
#endif
else
{
delete poSQLiteDS;
poSQLiteDS = NULL;
#else // HAVE_SPATIALITE
if( true )
{
#endif // HAVE_SPATIALITE
poSQLiteDS = new OGRSQLiteDataSource();
CPLSetThreadLocalConfigOption("OGR_SQLITE_STATIC_VIRTUAL_OGR", "NO");
nRet = poSQLiteDS->Create( pszTmpDBName, NULL );
CPLSetThreadLocalConfigOption("OGR_SQLITE_STATIC_VIRTUAL_OGR", pszOldVal);
if( !nRet )
{
delete poSQLiteDS;
VSIUnlink(pszTmpDBName);
CPLFree(pszTmpDBName);
return NULL;
}
}
/* -------------------------------------------------------------------- */
/* Attach the Virtual Table OGR2SQLITE module to it. */
/* -------------------------------------------------------------------- */
OGR2SQLITEModule* poModule = OGR2SQLITE_Setup(poDS, poSQLiteDS);
sqlite3* hDB = poSQLiteDS->GetDB();
/* -------------------------------------------------------------------- */
/* Analysze the statement to determine which tables will be used. */
/* -------------------------------------------------------------------- */
std::set<LayerDesc> oSetLayers;
std::set<CPLString> oSetSpatialIndex;
CPLString osModifiedSQL;
OGR2SQLITEGetPotentialLayerNames(pszStatement, oSetLayers,
oSetSpatialIndex, osModifiedSQL);
std::set<LayerDesc>::iterator oIter = oSetLayers.begin();
if( strcmp(pszStatement, osModifiedSQL.c_str()) != 0 )
CPLDebug("OGR", "Modified SQL: %s", osModifiedSQL.c_str());
pszStatement = osModifiedSQL.c_str(); /* do not use it anymore */
int bFoundOGRStyle = ( osModifiedSQL.ifind("OGR_STYLE") != std::string::npos );
/* -------------------------------------------------------------------- */
/* For each of those tables, create a Virtual Table. */
/* -------------------------------------------------------------------- */
OGRLayer* poSingleSrcLayer = NULL;
for(; oIter != oSetLayers.end(); ++oIter)
{
const LayerDesc& oLayerDesc = *oIter;
/*CPLDebug("OGR", "Layer desc : %s, %s, %s, %s",
oLayerDesc.osOriginalStr.c_str(),
oLayerDesc.osSubstitutedName.c_str(),
oLayerDesc.osDSName.c_str(),
oLayerDesc.osLayerName.c_str());*/
CPLString osSQL;
OGRLayer* poLayer = NULL;
CPLString osTableName;
int nExtraDS;
if( oLayerDesc.osDSName.size() == 0 )
{
poLayer = poDS->GetLayerByName(oLayerDesc.osLayerName);
/* Might be a false positive (unlikely) */
if( poLayer == NULL )
continue;
osTableName = oLayerDesc.osLayerName;
nExtraDS = -1;
}
else
{
OGRDataSource* poOtherDS = (OGRDataSource* )
OGROpen(oLayerDesc.osDSName, FALSE, NULL);
if( poOtherDS == NULL )
{
CPLError(CE_Failure, CPLE_AppDefined,
"Cannot open datasource '%s'",
oLayerDesc.osDSName.c_str() );
delete poSQLiteDS;
VSIUnlink(pszTmpDBName);
CPLFree(pszTmpDBName);
return NULL;
}
poLayer = poOtherDS->GetLayerByName(oLayerDesc.osLayerName);
if( poLayer == NULL )
{
CPLError(CE_Failure, CPLE_AppDefined,
"Cannot find layer '%s' in '%s'",
oLayerDesc.osLayerName.c_str(),
oLayerDesc.osDSName.c_str() );
delete poOtherDS;
delete poSQLiteDS;
VSIUnlink(pszTmpDBName);
CPLFree(pszTmpDBName);
return NULL;
}
osTableName = oLayerDesc.osSubstitutedName;
nExtraDS = OGR2SQLITE_AddExtraDS(poModule, poOtherDS);
}
if( oSetLayers.size() == 1 )
poSingleSrcLayer = poLayer;
osSQL.Printf("CREATE VIRTUAL TABLE \"%s\" USING VirtualOGR(%d,'%s',%d,%d)",
OGRSQLiteEscapeName(osTableName).c_str(),
nExtraDS,
OGRSQLiteEscape(oLayerDesc.osLayerName).c_str(),
bFoundOGRStyle,
TRUE/*bExposeOGRNativeData*/);
char* pszErrMsg = NULL;
int rc = sqlite3_exec( hDB, osSQL.c_str(),
NULL, NULL, &pszErrMsg );
if( rc != SQLITE_OK )
{
CPLError(CE_Failure, CPLE_AppDefined,
"Cannot create virtual table for layer '%s' : %s",
osTableName.c_str(), pszErrMsg);
sqlite3_free(pszErrMsg);
continue;
}
for(int i=0; i<poLayer->GetLayerDefn()->GetGeomFieldCount(); i++)
{
OGR2SQLITEDealWithSpatialColumn(poLayer, i, oLayerDesc,
osTableName, poSQLiteDS, hDB,
bSpatialiteDB, oSetLayers,
oSetSpatialIndex);
}
}
/* -------------------------------------------------------------------- */
/* Reload, so that virtual tables are recognized */
/* -------------------------------------------------------------------- */
poSQLiteDS->ReloadLayers();
/* -------------------------------------------------------------------- */
/* Prepare the statement. */
/* -------------------------------------------------------------------- */
/* This will speed-up layer creation */
/* ORDER BY are costly to evaluate and are not necessary to establish */
/* the layer definition. */
int bUseStatementForGetNextFeature = TRUE;
int bEmptyLayer = FALSE;
sqlite3_stmt *hSQLStmt = NULL;
int rc = sqlite3_prepare( hDB,
pszStatement, -1,
&hSQLStmt, NULL );
if( rc != SQLITE_OK )
{
CPLError( CE_Failure, CPLE_AppDefined,
"In ExecuteSQL(): sqlite3_prepare(%s):\n %s",
pszStatement, sqlite3_errmsg(hDB) );
if( hSQLStmt != NULL )
{
sqlite3_finalize( hSQLStmt );
}
delete poSQLiteDS;
VSIUnlink(pszTmpDBName);
CPLFree(pszTmpDBName);
return NULL;
}
/* -------------------------------------------------------------------- */
/* Do we get a resultset? */
/* -------------------------------------------------------------------- */
rc = sqlite3_step( hSQLStmt );
if( rc != SQLITE_ROW )
{
if ( rc != SQLITE_DONE )
{
CPLError( CE_Failure, CPLE_AppDefined,
"In ExecuteSQL(): sqlite3_step(%s):\n %s",
pszStatement, sqlite3_errmsg(hDB) );
sqlite3_finalize( hSQLStmt );
delete poSQLiteDS;
VSIUnlink(pszTmpDBName);
CPLFree(pszTmpDBName);
return NULL;
}
if( !STARTS_WITH_CI(pszStatement, "SELECT ") )
{
sqlite3_finalize( hSQLStmt );
delete poSQLiteDS;
VSIUnlink(pszTmpDBName);
CPLFree(pszTmpDBName);
return NULL;
}
bUseStatementForGetNextFeature = FALSE;
bEmptyLayer = TRUE;
}
/* -------------------------------------------------------------------- */
/* Create layer. */
/* -------------------------------------------------------------------- */
OGRSQLiteSelectLayer *poLayer = NULL;
poLayer = new OGRSQLiteExecuteSQLLayer( pszTmpDBName,
poSQLiteDS, pszStatement, hSQLStmt,
bUseStatementForGetNextFeature, bEmptyLayer );
if( poSpatialFilter != NULL )
poLayer->SetSpatialFilter( 0, poSpatialFilter );
if( poSingleSrcLayer != NULL )
poLayer->SetMetadata( poSingleSrcLayer->GetMetadata( "NATIVE_DATA" ),
"NATIVE_DATA" );
return poLayer;
}
/************************************************************************/
/* OGRSQLiteGetReferencedLayers() */
/************************************************************************/
std::set<LayerDesc> OGRSQLiteGetReferencedLayers(const char* pszStatement)
{
/* -------------------------------------------------------------------- */
/* Analysze the statement to determine which tables will be used. */
/* -------------------------------------------------------------------- */
std::set<LayerDesc> oSetLayers;
std::set<CPLString> oSetSpatialIndex;
CPLString osModifiedSQL;
OGR2SQLITEGetPotentialLayerNames(pszStatement, oSetLayers,
oSetSpatialIndex, osModifiedSQL);
return oSetLayers;
}
int ERSHdrNode::ParseChildren( VSILFILE * fp )
{
while( TRUE )
{
size_t iOff;
CPLString osLine;
/* -------------------------------------------------------------------- */
/* Read the next line (or multi-line for bracketed value). */
/* -------------------------------------------------------------------- */
if( !ReadLine( fp, osLine ) )
return FALSE;
/* -------------------------------------------------------------------- */
/* Got a Name=Value. */
/* -------------------------------------------------------------------- */
if( (iOff = osLine.find_first_of( '=' )) != std::string::npos )
{
CPLString osName = osLine.substr(0,iOff-1);
osName.Trim();
CPLString osValue = osLine.c_str() + iOff + 1;
osValue.Trim();
MakeSpace();
papszItemName[nItemCount] = CPLStrdup(osName);
papszItemValue[nItemCount] = CPLStrdup(osValue);
papoItemChild[nItemCount] = NULL;
nItemCount++;
}
/* -------------------------------------------------------------------- */
/* Got a Begin for an object. */
/* -------------------------------------------------------------------- */
else if( (iOff = osLine.ifind( " Begin" )) != std::string::npos )
{
CPLString osName = osLine.substr(0,iOff);
osName.Trim();
MakeSpace();
papszItemName[nItemCount] = CPLStrdup(osName);
papszItemValue[nItemCount] = NULL;
papoItemChild[nItemCount] = new ERSHdrNode();
nItemCount++;
if( !papoItemChild[nItemCount-1]->ParseChildren( fp ) )
return FALSE;
}
/* -------------------------------------------------------------------- */
/* Got an End for our object. Well, at least we *assume* it */
/* must be for our object. */
/* -------------------------------------------------------------------- */
else if( osLine.ifind( " End" ) != std::string::npos )
{
return TRUE;
}
/* -------------------------------------------------------------------- */
/* Error? */
/* -------------------------------------------------------------------- */
else if( osLine.Trim().length() > 0 )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Unexpected line parsing .ecw:\n%s",
osLine.c_str() );
return FALSE;
}
}
}
OGRLayer * OGRSQLiteExecuteSQL( OGRDataSource* poDS,
const char *pszStatement,
OGRGeometry *poSpatialFilter,
const char *pszDialect )
{
char* pszTmpDBName = (char*) CPLMalloc(256);
sprintf(pszTmpDBName, "/vsimem/ogr2sqlite/temp_%p.db", pszTmpDBName);
OGRSQLiteDataSource* poSQLiteDS = NULL;
int nRet;
int bSpatialiteDB = FALSE;
CPLString osOldVal;
const char* pszOldVal = CPLGetConfigOption("OGR_SQLITE_STATIC_VIRTUAL_OGR", NULL);
if( pszOldVal != NULL )
{
osOldVal = pszOldVal;
pszOldVal = osOldVal.c_str();
}
/* -------------------------------------------------------------------- */
/* Create in-memory sqlite/spatialite DB */
/* -------------------------------------------------------------------- */
#ifdef HAVE_SPATIALITE
/* -------------------------------------------------------------------- */
/* Creating an empty spatialite DB (with spatial_ref_sys populated */
/* has a non-neglectable cost. So at the first attempt, let's make */
/* one and cache it for later use. */
/* -------------------------------------------------------------------- */
#if 1
static vsi_l_offset nEmptyDBSize = 0;
static GByte* pabyEmptyDB = NULL;
{
static void* hMutex = NULL;
CPLMutexHolder oMutexHolder(&hMutex);
static int bTried = FALSE;
if( !bTried &&
CSLTestBoolean(CPLGetConfigOption("OGR_SQLITE_DIALECT_USE_SPATIALITE", "YES")) )
{
bTried = TRUE;
char* pszCachedFilename = (char*) CPLMalloc(256);
sprintf(pszCachedFilename, "/vsimem/ogr2sqlite/reference_%p.db",pszCachedFilename);
char** papszOptions = CSLAddString(NULL, "SPATIALITE=YES");
OGRSQLiteDataSource* poCachedDS = new OGRSQLiteDataSource();
nRet = poCachedDS->Create( pszCachedFilename, papszOptions );
CSLDestroy(papszOptions);
papszOptions = NULL;
delete poCachedDS;
if( nRet )
/* Note: the reference file keeps the ownership of the data, so that */
/* it gets released with VSICleanupFileManager() */
pabyEmptyDB = VSIGetMemFileBuffer( pszCachedFilename, &nEmptyDBSize, FALSE );
CPLFree( pszCachedFilename );
}
}
/* The following configuration option is usefull mostly for debugging/testing */
if( pabyEmptyDB != NULL && CSLTestBoolean(CPLGetConfigOption("OGR_SQLITE_DIALECT_USE_SPATIALITE", "YES")) )
{
GByte* pabyEmptyDBClone = (GByte*)VSIMalloc(nEmptyDBSize);
if( pabyEmptyDBClone == NULL )
{
CPLFree(pszTmpDBName);
return NULL;
}
memcpy(pabyEmptyDBClone, pabyEmptyDB, nEmptyDBSize);
VSIFCloseL(VSIFileFromMemBuffer( pszTmpDBName, pabyEmptyDBClone, nEmptyDBSize, TRUE ));
poSQLiteDS = new OGRSQLiteDataSource();
CPLSetThreadLocalConfigOption("OGR_SQLITE_STATIC_VIRTUAL_OGR", "NO");
nRet = poSQLiteDS->Open( pszTmpDBName, TRUE );
CPLSetThreadLocalConfigOption("OGR_SQLITE_STATIC_VIRTUAL_OGR", pszOldVal);
if( !nRet )
{
/* should not happen really ! */
delete poSQLiteDS;
VSIUnlink(pszTmpDBName);
CPLFree(pszTmpDBName);
return NULL;
}
bSpatialiteDB = TRUE;
}
#else
/* No caching version */
poSQLiteDS = new OGRSQLiteDataSource();
char** papszOptions = CSLAddString(NULL, "SPATIALITE=YES");
CPLSetThreadLocalConfigOption("OGR_SQLITE_STATIC_VIRTUAL_OGR", "NO");
nRet = poSQLiteDS->Create( pszTmpDBName, papszOptions );
CPLSetThreadLocalConfigOption("OGR_SQLITE_STATIC_VIRTUAL_OGR", pszOldVal);
CSLDestroy(papszOptions);
papszOptions = NULL;
if( nRet )
{
bSpatialiteDB = TRUE;
}
#endif
else
{
delete poSQLiteDS;
poSQLiteDS = NULL;
#else // HAVE_SPATIALITE
if( TRUE )
{
#endif // HAVE_SPATIALITE
poSQLiteDS = new OGRSQLiteDataSource();
CPLSetThreadLocalConfigOption("OGR_SQLITE_STATIC_VIRTUAL_OGR", "NO");
nRet = poSQLiteDS->Create( pszTmpDBName, NULL );
CPLSetThreadLocalConfigOption("OGR_SQLITE_STATIC_VIRTUAL_OGR", pszOldVal);
if( !nRet )
{
delete poSQLiteDS;
VSIUnlink(pszTmpDBName);
CPLFree(pszTmpDBName);
return NULL;
}
}
/* -------------------------------------------------------------------- */
/* Attach the Virtual Table OGR2SQLITE module to it. */
/* -------------------------------------------------------------------- */
OGR2SQLITEModule* poModule = OGR2SQLITE_Setup(poDS, poSQLiteDS);
sqlite3* hDB = poSQLiteDS->GetDB();
/* -------------------------------------------------------------------- */
/* Analysze the statement to determine which tables will be used. */
/* -------------------------------------------------------------------- */
std::set<LayerDesc> oSetLayers;
std::set<CPLString> oSetSpatialIndex;
CPLString osModifiedSQL;
OGR2SQLITEGetPotentialLayerNames(pszStatement, oSetLayers,
oSetSpatialIndex, osModifiedSQL);
std::set<LayerDesc>::iterator oIter = oSetLayers.begin();
if( strcmp(pszStatement, osModifiedSQL.c_str()) != 0 )
CPLDebug("OGR", "Modified SQL: %s", osModifiedSQL.c_str());
pszStatement = osModifiedSQL.c_str(); /* do not use it anymore */
int bFoundOGRStyle = ( osModifiedSQL.ifind("OGR_STYLE") != std::string::npos );
/* -------------------------------------------------------------------- */
/* For each of those tables, create a Virtual Table. */
/* -------------------------------------------------------------------- */
for(; oIter != oSetLayers.end(); ++oIter)
{
const LayerDesc& oLayerDesc = *oIter;
/*CPLDebug("OGR", "Layer desc : %s, %s, %s, %s",
oLayerDesc.osOriginalStr.c_str(),
oLayerDesc.osSubstitutedName.c_str(),
oLayerDesc.osDSName.c_str(),
oLayerDesc.osLayerName.c_str());*/
CPLString osSQL;
OGRLayer* poLayer = NULL;
CPLString osTableName;
int nExtraDS;
if( oLayerDesc.osDSName.size() == 0 )
{
poLayer = poDS->GetLayerByName(oLayerDesc.osLayerName);
/* Might be a false positive (unlikely) */
if( poLayer == NULL )
continue;
osTableName = oLayerDesc.osLayerName;
nExtraDS = -1;
osSQL.Printf("CREATE VIRTUAL TABLE \"%s\" USING VirtualOGR(%d,'%s',%d)",
OGRSQLiteEscapeName(osTableName).c_str(),
nExtraDS,
OGRSQLiteEscape(osTableName).c_str(),
bFoundOGRStyle);
}
else
{
OGRDataSource* poOtherDS = (OGRDataSource* )
OGROpen(oLayerDesc.osDSName, FALSE, NULL);
if( poOtherDS == NULL )
{
CPLError(CE_Failure, CPLE_AppDefined,
"Cannot open datasource '%s'",
oLayerDesc.osDSName.c_str() );
delete poSQLiteDS;
VSIUnlink(pszTmpDBName);
CPLFree(pszTmpDBName);
return NULL;
}
poLayer = poOtherDS->GetLayerByName(oLayerDesc.osLayerName);
if( poLayer == NULL )
{
CPLError(CE_Failure, CPLE_AppDefined,
"Cannot find layer '%s' in '%s'",
oLayerDesc.osLayerName.c_str(),
oLayerDesc.osDSName.c_str() );
delete poOtherDS;
delete poSQLiteDS;
VSIUnlink(pszTmpDBName);
CPLFree(pszTmpDBName);
return NULL;
}
osTableName = oLayerDesc.osSubstitutedName;
nExtraDS = OGR2SQLITE_AddExtraDS(poModule, poOtherDS);
osSQL.Printf("CREATE VIRTUAL TABLE \"%s\" USING VirtualOGR(%d,'%s',%d)",
OGRSQLiteEscapeName(osTableName).c_str(),
nExtraDS,
OGRSQLiteEscape(oLayerDesc.osLayerName).c_str(),
bFoundOGRStyle);
}
char* pszErrMsg = NULL;
int rc = sqlite3_exec( hDB, osSQL.c_str(),
NULL, NULL, &pszErrMsg );
if( rc != SQLITE_OK )
{
CPLError(CE_Failure, CPLE_AppDefined,
"Cannot create virtual table for layer '%s' : %s",
osTableName.c_str(), pszErrMsg);
sqlite3_free(pszErrMsg);
continue;
}
if( poLayer->GetGeomType() == wkbNone )
continue;
CPLString osGeomColRaw(OGR2SQLITE_GetNameForGeometryColumn(poLayer));
const char* pszGeomColRaw = osGeomColRaw.c_str();
CPLString osGeomColEscaped(OGRSQLiteEscape(pszGeomColRaw));
const char* pszGeomColEscaped = osGeomColEscaped.c_str();
CPLString osLayerNameEscaped(OGRSQLiteEscape(osTableName));
const char* pszLayerNameEscaped = osLayerNameEscaped.c_str();
CPLString osIdxNameRaw(CPLSPrintf("idx_%s_%s",
oLayerDesc.osLayerName.c_str(), pszGeomColRaw));
CPLString osIdxNameEscaped(OGRSQLiteEscapeName(osIdxNameRaw));
/* Make sure that the SRS is injected in spatial_ref_sys */
OGRSpatialReference* poSRS = poLayer->GetSpatialRef();
int nSRSId = poSQLiteDS->GetUndefinedSRID();
if( poSRS != NULL )
nSRSId = poSQLiteDS->FetchSRSId(poSRS);
int bCreateSpatialIndex = FALSE;
if( !bSpatialiteDB )
{
osSQL.Printf("INSERT INTO geometry_columns (f_table_name, "
"f_geometry_column, geometry_format, geometry_type, "
"coord_dimension, srid) "
"VALUES ('%s','%s','SpatiaLite',%d,%d,%d)",
pszLayerNameEscaped,
pszGeomColEscaped,
(int) wkbFlatten(poLayer->GetGeomType()),
( poLayer->GetGeomType() & wkb25DBit ) ? 3 : 2,
nSRSId);
}
#ifdef HAVE_SPATIALITE
else
{
/* We detect the need for creating a spatial index by 2 means : */
/* 1) if there's an explicit reference to a 'idx_layername_geometrycolumn' */
/* table in the SQL --> old/traditionnal way of requesting spatial indices */
/* with spatialite. */
std::set<LayerDesc>::iterator oIter2 = oSetLayers.begin();
for(; oIter2 != oSetLayers.end(); ++oIter2)
{
const LayerDesc& oLayerDescIter = *oIter2;
if( EQUAL(oLayerDescIter.osLayerName, osIdxNameRaw) )
{
bCreateSpatialIndex = TRUE;
break;
}
}
/* 2) or if there's a SELECT FROM SpatialIndex WHERE f_table_name = 'layername' */
if( !bCreateSpatialIndex )
{
std::set<CPLString>::iterator oIter3 = oSetSpatialIndex.begin();
for(; oIter3 != oSetSpatialIndex.end(); ++oIter3)
{
const CPLString& osNameIter = *oIter3;
if( EQUAL(osNameIter, oLayerDesc.osLayerName) )
{
bCreateSpatialIndex = TRUE;
break;
}
}
}
if( poSQLiteDS->HasSpatialite4Layout() )
{
int nGeomType = poLayer->GetGeomType();
int nCoordDimension = 2;
if( nGeomType & wkb25DBit )
{
nGeomType += 1000;
nCoordDimension = 3;
}
osSQL.Printf("INSERT INTO geometry_columns (f_table_name, "
"f_geometry_column, geometry_type, coord_dimension, "
"srid, spatial_index_enabled) "
"VALUES ('%s',Lower('%s'),%d ,%d ,%d, %d)",
pszLayerNameEscaped,
pszGeomColEscaped, nGeomType,
nCoordDimension,
nSRSId, bCreateSpatialIndex );
}
else
{
const char *pszGeometryType = OGRToOGCGeomType(poLayer->GetGeomType());
if (pszGeometryType[0] == '\0')
pszGeometryType = "GEOMETRY";
osSQL.Printf("INSERT INTO geometry_columns (f_table_name, "
"f_geometry_column, type, coord_dimension, "
"srid, spatial_index_enabled) "
"VALUES ('%s','%s','%s','%s',%d, %d)",
pszLayerNameEscaped,
pszGeomColEscaped, pszGeometryType,
( poLayer->GetGeomType() & wkb25DBit ) ? "XYZ" : "XY",
nSRSId, bCreateSpatialIndex );
}
}
#endif // HAVE_SPATIALITE
sqlite3_exec( hDB, osSQL.c_str(), NULL, NULL, NULL );
#ifdef HAVE_SPATIALITE
/* -------------------------------------------------------------------- */
/* Should we create a spatial index ?. */
/* -------------------------------------------------------------------- */
if( !bSpatialiteDB || !bCreateSpatialIndex )
continue;
CPLDebug("SQLITE", "Create spatial index %s", osIdxNameRaw.c_str());
/* ENABLE_VIRTUAL_OGR_SPATIAL_INDEX is not defined */
#ifdef ENABLE_VIRTUAL_OGR_SPATIAL_INDEX
osSQL.Printf("CREATE VIRTUAL TABLE \"%s\" USING "
"VirtualOGRSpatialIndex(%d, '%s', pkid, xmin, xmax, ymin, ymax)",
osIdxNameEscaped.c_str(),
nExtraDS,
OGRSQLiteEscape(oLayerDesc.osLayerName).c_str());
rc = sqlite3_exec( hDB, osSQL.c_str(), NULL, NULL, NULL );
if( rc != SQLITE_OK )
{
CPLDebug("SQLITE",
"Error occured during spatial index creation : %s",
sqlite3_errmsg(hDB));
}
#else // ENABLE_VIRTUAL_OGR_SPATIAL_INDEX
rc = sqlite3_exec( hDB, "BEGIN", NULL, NULL, NULL );
osSQL.Printf("CREATE VIRTUAL TABLE \"%s\" "
"USING rtree(pkid, xmin, xmax, ymin, ymax)",
osIdxNameEscaped.c_str());
if( rc == SQLITE_OK )
rc = sqlite3_exec( hDB, osSQL.c_str(), NULL, NULL, NULL );
sqlite3_stmt *hStmt = NULL;
if( rc == SQLITE_OK )
{
const char* pszInsertInto = CPLSPrintf(
"INSERT INTO \"%s\" (pkid, xmin, xmax, ymin, ymax) "
"VALUES (?,?,?,?,?)", osIdxNameEscaped.c_str());
rc = sqlite3_prepare(hDB, pszInsertInto, -1, &hStmt, NULL);
}
OGRFeature* poFeature;
OGREnvelope sEnvelope;
OGR2SQLITE_IgnoreAllFieldsExceptGeometry(poLayer);
poLayer->ResetReading();
while( rc == SQLITE_OK &&
(poFeature = poLayer->GetNextFeature()) != NULL )
{
OGRGeometry* poGeom = poFeature->GetGeometryRef();
if( poGeom != NULL && !poGeom->IsEmpty() )
{
poGeom->getEnvelope(&sEnvelope);
sqlite3_bind_int64(hStmt, 1,
(sqlite3_int64) poFeature->GetFID() );
sqlite3_bind_double(hStmt, 2, sEnvelope.MinX);
sqlite3_bind_double(hStmt, 3, sEnvelope.MaxX);
sqlite3_bind_double(hStmt, 4, sEnvelope.MinY);
sqlite3_bind_double(hStmt, 5, sEnvelope.MaxY);
rc = sqlite3_step(hStmt);
if( rc == SQLITE_OK || rc == SQLITE_DONE )
rc = sqlite3_reset(hStmt);
}
delete poFeature;
}
poLayer->SetIgnoredFields(NULL);
sqlite3_finalize(hStmt);
if( rc == SQLITE_OK )
rc = sqlite3_exec( hDB, "COMMIT", NULL, NULL, NULL );
else
{
CPLDebug("SQLITE",
"Error occured during spatial index creation : %s",
sqlite3_errmsg(hDB));
rc = sqlite3_exec( hDB, "ROLLBACK", NULL, NULL, NULL );
}
#endif // ENABLE_VIRTUAL_OGR_SPATIAL_INDEX
#endif // HAVE_SPATIALITE
}
/* -------------------------------------------------------------------- */
/* Reload, so that virtual tables are recognized */
/* -------------------------------------------------------------------- */
poSQLiteDS->ReloadLayers();
/* -------------------------------------------------------------------- */
/* Prepare the statement. */
/* -------------------------------------------------------------------- */
/* This will speed-up layer creation */
/* ORDER BY are costly to evaluate and are not necessary to establish */
/* the layer definition. */
int bUseStatementForGetNextFeature = TRUE;
int bEmptyLayer = FALSE;
sqlite3_stmt *hSQLStmt = NULL;
int rc = sqlite3_prepare( hDB,
pszStatement, strlen(pszStatement),
&hSQLStmt, NULL );
if( rc != SQLITE_OK )
{
CPLError( CE_Failure, CPLE_AppDefined,
"In ExecuteSQL(): sqlite3_prepare(%s):\n %s",
pszStatement, sqlite3_errmsg(hDB) );
if( hSQLStmt != NULL )
{
sqlite3_finalize( hSQLStmt );
}
delete poSQLiteDS;
VSIUnlink(pszTmpDBName);
CPLFree(pszTmpDBName);
return NULL;
}
/* -------------------------------------------------------------------- */
/* Do we get a resultset? */
/* -------------------------------------------------------------------- */
rc = sqlite3_step( hSQLStmt );
if( rc != SQLITE_ROW )
{
if ( rc != SQLITE_DONE )
{
CPLError( CE_Failure, CPLE_AppDefined,
"In ExecuteSQL(): sqlite3_step(%s):\n %s",
pszStatement, sqlite3_errmsg(hDB) );
sqlite3_finalize( hSQLStmt );
delete poSQLiteDS;
VSIUnlink(pszTmpDBName);
CPLFree(pszTmpDBName);
return NULL;
}
if( !EQUALN(pszStatement, "SELECT ", 7) )
{
sqlite3_finalize( hSQLStmt );
delete poSQLiteDS;
VSIUnlink(pszTmpDBName);
CPLFree(pszTmpDBName);
return NULL;
}
bUseStatementForGetNextFeature = FALSE;
bEmptyLayer = TRUE;
}
/* -------------------------------------------------------------------- */
/* Create layer. */
/* -------------------------------------------------------------------- */
OGRSQLiteSelectLayer *poLayer = NULL;
poLayer = new OGRSQLiteExecuteSQLLayer( pszTmpDBName,
poSQLiteDS, pszStatement, hSQLStmt,
bUseStatementForGetNextFeature, bEmptyLayer );
if( poSpatialFilter != NULL )
poLayer->SetSpatialFilter( poSpatialFilter );
return poLayer;
}
/************************************************************************/
/* OGRSQLiteGetReferencedLayers() */
/************************************************************************/
std::set<LayerDesc> OGRSQLiteGetReferencedLayers(const char* pszStatement)
{
/* -------------------------------------------------------------------- */
/* Analysze the statement to determine which tables will be used. */
/* -------------------------------------------------------------------- */
std::set<LayerDesc> oSetLayers;
std::set<CPLString> oSetSpatialIndex;
CPLString osModifiedSQL;
OGR2SQLITEGetPotentialLayerNames(pszStatement, oSetLayers,
oSetSpatialIndex, osModifiedSQL);
return oSetLayers;
}
