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ogrmssqlspatialtablelayer.cpp
2364 lines (2014 loc) · 82.8 KB
/
ogrmssqlspatialtablelayer.cpp
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/******************************************************************************
*
* Project: MSSQL Spatial driver
* Purpose: Implements OGRMSSQLSpatialTableLayer class, access to an existing table.
* Author: Tamas Szekeres, szekerest at gmail.com
*
******************************************************************************
* Copyright (c) 2010, Tamas Szekeres
* Copyright (c) 2010-2012, Even Rouault <even dot rouault at mines-paris dot org>
*
* 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 "cpl_conv.h"
#include "ogr_mssqlspatial.h"
#include "ogr_p.h"
#ifdef SQLNCLI_VERSION
#include <sqlncli.h>
#endif
CPL_CVSID("$Id$")
/************************************************************************/
/* OGRMSSQLAppendEscaped( ) */
/************************************************************************/
void OGRMSSQLAppendEscaped( CPLODBCStatement* poStatement, const char* pszStrValue)
{
if (!pszStrValue)
{
poStatement->Append("null");
return;
}
size_t iIn, iOut , nTextLen = strlen(pszStrValue);
char *pszEscapedText = (char *) CPLMalloc(nTextLen*2 + 3);
pszEscapedText[0] = '\'';
for( iIn = 0, iOut = 1; iIn < nTextLen; iIn++ )
{
switch( pszStrValue[iIn] )
{
case '\'':
pszEscapedText[iOut++] = '\''; // double quote
pszEscapedText[iOut++] = pszStrValue[iIn];
break;
default:
pszEscapedText[iOut++] = pszStrValue[iIn];
break;
}
}
pszEscapedText[iOut++] = '\'';
pszEscapedText[iOut] = '\0';
poStatement->Append(pszEscapedText);
CPLFree( pszEscapedText );
}
/************************************************************************/
/* OGRMSSQLSpatialTableLayer() */
/************************************************************************/
OGRMSSQLSpatialTableLayer::OGRMSSQLSpatialTableLayer( OGRMSSQLSpatialDataSource *poDSIn )
{
poDS = poDSIn;
}
/************************************************************************/
/* ~OGRMSSQLSpatialTableLayer() */
/************************************************************************/
OGRMSSQLSpatialTableLayer::~OGRMSSQLSpatialTableLayer()
{
#ifdef MSSQL_BCP_SUPPORTED
CloseBCP();
#endif
if ( bNeedSpatialIndex && nLayerStatus == MSSQLLAYERSTATUS_CREATED )
{
/* recreate spatial index */
DropSpatialIndex();
CreateSpatialIndex();
}
CPLFree( pszTableName );
CPLFree( pszLayerName );
CPLFree( pszSchemaName );
CPLFree( pszQuery );
ClearStatement();
}
/************************************************************************/
/* GetName() */
/************************************************************************/
const char *OGRMSSQLSpatialTableLayer::GetName()
{
return pszLayerName;
}
/************************************************************************/
/* GetLayerDefn() */
/************************************************************************/
OGRFeatureDefn* OGRMSSQLSpatialTableLayer::GetLayerDefn()
{
if (poFeatureDefn)
return poFeatureDefn;
CPLODBCSession *poSession = poDS->GetSession();
/* -------------------------------------------------------------------- */
/* Do we have a simple primary key? */
/* -------------------------------------------------------------------- */
CPLODBCStatement oGetKey( poSession );
if( oGetKey.GetPrimaryKeys( pszTableName, poDS->GetCatalog(), pszSchemaName )
&& oGetKey.Fetch() )
{
pszFIDColumn = CPLStrdup(oGetKey.GetColData( 3 ));
if( oGetKey.Fetch() ) // more than one field in key!
{
oGetKey.Clear();
CPLFree( pszFIDColumn );
pszFIDColumn = nullptr;
CPLDebug( "OGR_MSSQLSpatial", "Table %s has multiple primary key fields, "
"ignoring them all.", pszTableName );
}
}
/* -------------------------------------------------------------------- */
/* Get the column definitions for this table. */
/* -------------------------------------------------------------------- */
CPLODBCStatement oGetCol( poSession );
CPLErr eErr;
if( !oGetCol.GetColumns( pszTableName, poDS->GetCatalog(), pszSchemaName ) )
return nullptr;
eErr = BuildFeatureDefn( pszLayerName, &oGetCol );
if( eErr != CE_None )
return nullptr;
if (eGeomType != wkbNone)
poFeatureDefn->SetGeomType(eGeomType);
if ( GetSpatialRef() && poFeatureDefn->GetGeomFieldCount() == 1)
poFeatureDefn->GetGeomFieldDefn(0)->SetSpatialRef( poSRS );
if( poFeatureDefn->GetFieldCount() == 0 &&
pszFIDColumn == nullptr && pszGeomColumn == nullptr )
{
CPLError( CE_Failure, CPLE_AppDefined,
"No column definitions found for table '%s', layer not usable.",
pszLayerName );
return nullptr;
}
/* -------------------------------------------------------------------- */
/* If we got a geometry column, does it exist? Is it binary? */
/* -------------------------------------------------------------------- */
if( pszGeomColumn != nullptr )
{
int iColumn = oGetCol.GetColId( pszGeomColumn );
if( iColumn < 0 )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Column %s requested for geometry, but it does not exist.",
pszGeomColumn );
CPLFree( pszGeomColumn );
pszGeomColumn = nullptr;
}
else
{
if ( nGeomColumnType < 0 )
{
/* last attempt to identify the geometry column type */
if ( EQUAL(oGetCol.GetColTypeName( iColumn ), "geometry") )
nGeomColumnType = MSSQLCOLTYPE_GEOMETRY;
else if ( EQUAL(oGetCol.GetColTypeName( iColumn ), "geography") )
nGeomColumnType = MSSQLCOLTYPE_GEOGRAPHY;
else if ( EQUAL(oGetCol.GetColTypeName( iColumn ), "varchar") )
nGeomColumnType = MSSQLCOLTYPE_TEXT;
else if ( EQUAL(oGetCol.GetColTypeName( iColumn ), "nvarchar") )
nGeomColumnType = MSSQLCOLTYPE_TEXT;
else if ( EQUAL(oGetCol.GetColTypeName( iColumn ), "text") )
nGeomColumnType = MSSQLCOLTYPE_TEXT;
else if ( EQUAL(oGetCol.GetColTypeName( iColumn ), "ntext") )
nGeomColumnType = MSSQLCOLTYPE_TEXT;
else if ( EQUAL(oGetCol.GetColTypeName( iColumn ), "image") )
nGeomColumnType = MSSQLCOLTYPE_BINARY;
else
{
CPLError( CE_Failure, CPLE_AppDefined,
"Column type %s is not supported for geometry column.",
oGetCol.GetColTypeName( iColumn ) );
CPLFree( pszGeomColumn );
pszGeomColumn = nullptr;
}
}
}
}
return poFeatureDefn;
}
/************************************************************************/
/* Initialize() */
/************************************************************************/
CPLErr OGRMSSQLSpatialTableLayer::Initialize( const char *pszSchema,
const char *pszLayerNameIn,
const char *pszGeomCol,
CPL_UNUSED int nCoordDimension,
int nSRId,
const char *pszSRText,
OGRwkbGeometryType eType )
{
CPLFree( pszFIDColumn );
pszFIDColumn = nullptr;
/* -------------------------------------------------------------------- */
/* Parse out schema name if present in layer. We assume a */
/* schema is provided if there is a dot in the name, and that */
/* it is in the form <schema>.<tablename> */
/* -------------------------------------------------------------------- */
const char *pszDot = strstr(pszLayerNameIn,".");
if( pszDot != nullptr )
{
pszTableName = CPLStrdup(pszDot + 1);
if (pszSchema == nullptr)
{
pszSchemaName = CPLStrdup(pszLayerNameIn);
pszSchemaName[pszDot - pszLayerNameIn] = '\0';
}
else
pszSchemaName = CPLStrdup(pszSchema);
this->pszLayerName = CPLStrdup(pszLayerNameIn);
}
else
{
pszTableName = CPLStrdup(pszLayerNameIn);
if ( pszSchema == nullptr || EQUAL(pszSchema, "dbo") )
{
pszSchemaName = CPLStrdup("dbo");
this->pszLayerName = CPLStrdup(pszLayerNameIn);
}
else
{
pszSchemaName = CPLStrdup(pszSchema);
this->pszLayerName = CPLStrdup(CPLSPrintf("%s.%s", pszSchemaName, pszTableName));
}
}
SetDescription( this->pszLayerName );
/* -------------------------------------------------------------------- */
/* Have we been provided a geometry column? */
/* -------------------------------------------------------------------- */
CPLFree( pszGeomColumn );
if( pszGeomCol == nullptr )
GetLayerDefn(); /* fetch geom column if not specified */
else
pszGeomColumn = CPLStrdup( pszGeomCol );
if (eType != wkbNone)
eGeomType = eType;
/* -------------------------------------------------------------------- */
/* Try to find out the spatial reference */
/* -------------------------------------------------------------------- */
nSRSId = nSRId;
if (pszSRText)
{
/* Process srtext directly if specified */
poSRS = new OGRSpatialReference();
if( poSRS->importFromWkt( pszSRText ) != OGRERR_NONE )
{
delete poSRS;
poSRS = nullptr;
}
}
if (!poSRS)
{
if (nSRSId < 0)
nSRSId = FetchSRSId();
GetSpatialRef();
}
return CE_None;
}
/************************************************************************/
/* FetchSRSId() */
/************************************************************************/
int OGRMSSQLSpatialTableLayer::FetchSRSId()
{
if ( poDS->UseGeometryColumns() )
{
CPLODBCStatement oStatement( poDS->GetSession() );
oStatement.Appendf( "select srid from geometry_columns "
"where f_table_schema = '%s' and f_table_name = '%s'",
pszSchemaName, pszTableName );
if( oStatement.ExecuteSQL() && oStatement.Fetch() )
{
if ( oStatement.GetColData( 0 ) )
nSRSId = atoi( oStatement.GetColData( 0 ) );
}
}
return nSRSId;
}
/************************************************************************/
/* CreateSpatialIndex() */
/* */
/* Create a spatial index on the geometry column of the layer */
/************************************************************************/
OGRErr OGRMSSQLSpatialTableLayer::CreateSpatialIndex()
{
OGRMSSQLSpatialTableLayer::GetLayerDefn();
CPLODBCStatement oStatement( poDS->GetSession() );
if (nGeomColumnType == MSSQLCOLTYPE_GEOMETRY)
{
OGREnvelope oExt;
if (GetExtent(&oExt, TRUE) != OGRERR_NONE)
{
CPLError( CE_Warning, CPLE_AppDefined,
"Failed to get extent for spatial index." );
return OGRERR_FAILURE;
}
if (oExt.MinX == oExt.MaxX || oExt.MinY == oExt.MaxY)
return OGRERR_NONE; /* skip creating index */
oStatement.Appendf("CREATE SPATIAL INDEX [ogr_%s_%s_%s_sidx] ON [%s].[%s] ( [%s] ) "
"USING GEOMETRY_GRID WITH (BOUNDING_BOX =(%.15g, %.15g, %.15g, %.15g))",
pszSchemaName, pszTableName, pszGeomColumn,
pszSchemaName, pszTableName, pszGeomColumn,
oExt.MinX, oExt.MinY, oExt.MaxX, oExt.MaxY );
}
else if (nGeomColumnType == MSSQLCOLTYPE_GEOGRAPHY)
{
oStatement.Appendf("CREATE SPATIAL INDEX [ogr_%s_%s_%s_sidx] ON [%s].[%s] ( [%s] ) "
"USING GEOGRAPHY_GRID",
pszSchemaName, pszTableName, pszGeomColumn,
pszSchemaName, pszTableName, pszGeomColumn );
}
else
{
CPLError( CE_Failure, CPLE_AppDefined,
"Spatial index is not supported on the geometry column '%s'", pszGeomColumn);
return OGRERR_FAILURE;
}
if( !oStatement.ExecuteSQL() )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Failed to create the spatial index, %s.",
poDS->GetSession()->GetLastError());
return OGRERR_FAILURE;
}
return OGRERR_NONE;
}
/************************************************************************/
/* DropSpatialIndex() */
/* */
/* Drop the spatial index on the geometry column of the layer */
/************************************************************************/
void OGRMSSQLSpatialTableLayer::DropSpatialIndex()
{
OGRMSSQLSpatialTableLayer::GetLayerDefn();
CPLODBCStatement oStatement( poDS->GetSession() );
oStatement.Appendf("IF EXISTS (SELECT * FROM sys.indexes "
"WHERE object_id = OBJECT_ID(N'[%s].[%s]') AND name = N'ogr_%s_%s_%s_sidx') "
"DROP INDEX [ogr_%s_%s_%s_sidx] ON [%s].[%s]",
pszSchemaName, pszTableName,
pszSchemaName, pszTableName, pszGeomColumn,
pszSchemaName, pszTableName, pszGeomColumn,
pszSchemaName, pszTableName );
if( !oStatement.ExecuteSQL() )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Failed to drop the spatial index, %s.",
poDS->GetSession()->GetLastError());
return;
}
}
/************************************************************************/
/* BuildFields() */
/* */
/* Build list of fields to fetch, performing any required */
/* transformations (such as on geometry). */
/************************************************************************/
CPLString OGRMSSQLSpatialTableLayer::BuildFields()
{
int i = 0;
int nColumn = 0;
CPLString osFieldList;
GetLayerDefn();
if( pszFIDColumn && poFeatureDefn->GetFieldIndex( pszFIDColumn ) == -1 )
{
/* Always get the FID column */
osFieldList += "[";
osFieldList += pszFIDColumn;
osFieldList += "]";
++nColumn;
}
if( pszGeomColumn && !poFeatureDefn->IsGeometryIgnored())
{
if( nColumn > 0 )
osFieldList += ", ";
osFieldList += "[";
osFieldList += pszGeomColumn;
if (nGeomColumnType == MSSQLCOLTYPE_GEOMETRY ||
nGeomColumnType == MSSQLCOLTYPE_GEOGRAPHY)
{
if ( poDS->GetGeometryFormat() == MSSQLGEOMETRY_WKB )
{
osFieldList += "].STAsBinary() as [";
osFieldList += pszGeomColumn;
}
else if ( poDS->GetGeometryFormat() == MSSQLGEOMETRY_WKT )
{
osFieldList += "].AsTextZM() as [";
osFieldList += pszGeomColumn;
}
else if ( poDS->GetGeometryFormat() == MSSQLGEOMETRY_WKBZM )
{
/* SQL Server 2012 */
osFieldList += "].AsBinaryZM() as [";
osFieldList += pszGeomColumn;
}
}
osFieldList += "]";
++nColumn;
}
if (poFeatureDefn->GetFieldCount() > 0)
{
/* need to reconstruct the field ordinals list */
CPLFree(panFieldOrdinals);
panFieldOrdinals = (int *) CPLMalloc( sizeof(int) * poFeatureDefn->GetFieldCount() );
for( i = 0; i < poFeatureDefn->GetFieldCount(); i++ )
{
if ( poFeatureDefn->GetFieldDefn(i)->IsIgnored() )
continue;
const char *pszName = poFeatureDefn->GetFieldDefn(i)->GetNameRef();
if( nColumn > 0 )
osFieldList += ", ";
osFieldList += "[";
osFieldList += pszName;
osFieldList += "]";
panFieldOrdinals[i] = nColumn;
++nColumn;
}
}
return osFieldList;
}
/************************************************************************/
/* ClearStatement() */
/************************************************************************/
void OGRMSSQLSpatialTableLayer::ClearStatement()
{
if( poStmt != nullptr )
{
delete poStmt;
poStmt = nullptr;
}
}
/************************************************************************/
/* GetStatement() */
/************************************************************************/
CPLODBCStatement *OGRMSSQLSpatialTableLayer::GetStatement()
{
if( poStmt == nullptr )
{
poStmt = BuildStatement(BuildFields());
iNextShapeId = 0;
}
return poStmt;
}
/************************************************************************/
/* BuildStatement() */
/************************************************************************/
CPLODBCStatement* OGRMSSQLSpatialTableLayer::BuildStatement(const char* pszColumns)
{
CPLODBCStatement* poStatement = new CPLODBCStatement( poDS->GetSession() );
poStatement->Append( "select " );
poStatement->Append( pszColumns );
poStatement->Append( " from [" );
poStatement->Append( pszSchemaName );
poStatement->Append( "].[" );
poStatement->Append( pszTableName );
poStatement->Append( "]" );
/* Append attribute query if we have it */
if( pszQuery != nullptr )
poStatement->Appendf( " where (%s)", pszQuery );
/* If we have a spatial filter, query on it */
if ( m_poFilterGeom != nullptr )
{
if (nGeomColumnType == MSSQLCOLTYPE_GEOMETRY
|| nGeomColumnType == MSSQLCOLTYPE_GEOGRAPHY)
{
if( pszQuery == nullptr )
poStatement->Append( " where" );
else
poStatement->Append( " and" );
poStatement->Appendf(" [%s].STIntersects(", pszGeomColumn );
if (nGeomColumnType == MSSQLCOLTYPE_GEOGRAPHY)
poStatement->Append( "geography::" );
else
poStatement->Append( "geometry::" );
if ( m_sFilterEnvelope.MinX == m_sFilterEnvelope.MaxX ||
m_sFilterEnvelope.MinY == m_sFilterEnvelope.MaxY)
poStatement->Appendf("STGeomFromText('POINT(%.15g %.15g)',%d)) = 1",
m_sFilterEnvelope.MinX, m_sFilterEnvelope.MinY, nSRSId >= 0? nSRSId : 0);
else
poStatement->Appendf( "STGeomFromText('POLYGON((%.15g %.15g,%.15g %.15g,%.15g %.15g,%.15g %.15g,%.15g %.15g))',%d)) = 1",
m_sFilterEnvelope.MinX, m_sFilterEnvelope.MinY,
m_sFilterEnvelope.MaxX, m_sFilterEnvelope.MinY,
m_sFilterEnvelope.MaxX, m_sFilterEnvelope.MaxY,
m_sFilterEnvelope.MinX, m_sFilterEnvelope.MaxY,
m_sFilterEnvelope.MinX, m_sFilterEnvelope.MinY,
nSRSId >= 0? nSRSId : 0 );
}
else
{
CPLError( CE_Failure, CPLE_AppDefined,
"Spatial filter is supported only on geometry and geography column types." );
delete poStatement;
return nullptr;
}
}
CPLDebug( "OGR_MSSQLSpatial", "ExecuteSQL(%s)", poStatement->GetCommand() );
if( poStatement->ExecuteSQL() )
return poStatement;
else
{
delete poStatement;
return nullptr;
}
}
/************************************************************************/
/* ResetReading() */
/************************************************************************/
void OGRMSSQLSpatialTableLayer::ResetReading()
{
ClearStatement();
OGRMSSQLSpatialLayer::ResetReading();
}
/************************************************************************/
/* GetFeature() */
/************************************************************************/
OGRFeature *OGRMSSQLSpatialTableLayer::GetFeature( GIntBig nFeatureId )
{
if( pszFIDColumn == nullptr )
return OGRMSSQLSpatialLayer::GetFeature( nFeatureId );
poDS->EndCopy();
ClearStatement();
iNextShapeId = nFeatureId;
poStmt = new CPLODBCStatement( poDS->GetSession() );
CPLString osFields = BuildFields();
poStmt->Appendf( "select %s from %s where %s = " CPL_FRMT_GIB, osFields.c_str(),
poFeatureDefn->GetName(), pszFIDColumn, nFeatureId );
if( !poStmt->ExecuteSQL() )
{
delete poStmt;
poStmt = nullptr;
return nullptr;
}
return GetNextRawFeature();
}
/************************************************************************/
/* SetAttributeFilter() */
/************************************************************************/
OGRErr OGRMSSQLSpatialTableLayer::SetAttributeFilter( const char *pszQueryIn )
{
CPLFree(m_pszAttrQueryString);
m_pszAttrQueryString = (pszQueryIn) ? CPLStrdup(pszQueryIn) : nullptr;
if( (pszQueryIn == nullptr && this->pszQuery == nullptr)
|| (pszQueryIn != nullptr && this->pszQuery != nullptr
&& EQUAL(pszQueryIn,this->pszQuery)) )
return OGRERR_NONE;
CPLFree( this->pszQuery );
this->pszQuery = (pszQueryIn) ? CPLStrdup( pszQueryIn ) : nullptr;
ClearStatement();
return OGRERR_NONE;
}
/************************************************************************/
/* TestCapability() */
/************************************************************************/
int OGRMSSQLSpatialTableLayer::TestCapability( const char * pszCap )
{
if ( bUpdateAccess )
{
if( EQUAL(pszCap,OLCSequentialWrite) || EQUAL(pszCap,OLCCreateField)
|| EQUAL(pszCap,OLCDeleteFeature) )
return TRUE;
else if( EQUAL(pszCap,OLCRandomWrite) )
return pszFIDColumn != nullptr;
}
#if (ODBCVER >= 0x0300)
if( EQUAL(pszCap,OLCTransactions) )
return TRUE;
#else
if( EQUAL(pszCap,OLCTransactions) )
return FALSE;
#endif
if( EQUAL(pszCap,OLCIgnoreFields) )
return TRUE;
if( EQUAL(pszCap,OLCRandomRead) )
return pszFIDColumn != nullptr;
else if( EQUAL(pszCap,OLCFastFeatureCount) )
return TRUE;
else
return OGRMSSQLSpatialLayer::TestCapability( pszCap );
}
/************************************************************************/
/* GetFeatureCount() */
/************************************************************************/
GIntBig OGRMSSQLSpatialTableLayer::GetFeatureCount( int bForce )
{
poDS->EndCopy();
GetLayerDefn();
if( TestCapability(OLCFastFeatureCount) == FALSE )
return OGRMSSQLSpatialLayer::GetFeatureCount( bForce );
ClearStatement();
CPLODBCStatement* poStatement = BuildStatement( "count(*)" );
if (poStatement == nullptr || !poStatement->Fetch())
{
delete poStatement;
return OGRMSSQLSpatialLayer::GetFeatureCount( bForce );
}
GIntBig nRet = CPLAtoGIntBig(poStatement->GetColData( 0 ));
delete poStatement;
return nRet;
}
/************************************************************************/
/* StartCopy() */
/************************************************************************/
OGRErr OGRMSSQLSpatialTableLayer::StartCopy()
{
return OGRERR_NONE;
}
/************************************************************************/
/* EndCopy() */
/************************************************************************/
OGRErr OGRMSSQLSpatialTableLayer::EndCopy()
{
#ifdef MSSQL_BCP_SUPPORTED
CloseBCP();
#endif
return OGRERR_NONE;
}
/************************************************************************/
/* CreateField() */
/************************************************************************/
OGRErr OGRMSSQLSpatialTableLayer::CreateField( OGRFieldDefn *poFieldIn,
int bApproxOK )
{
char szFieldType[256];
OGRFieldDefn oField( poFieldIn );
poDS->EndCopy();
GetLayerDefn();
/* -------------------------------------------------------------------- */
/* Do we want to "launder" the column names into MSSQL */
/* friendly format? */
/* -------------------------------------------------------------------- */
if( bLaunderColumnNames )
{
char *pszSafeName = poDS->LaunderName( oField.GetNameRef() );
oField.SetName( pszSafeName );
CPLFree( pszSafeName );
}
/* -------------------------------------------------------------------- */
/* Identify the MSSQL type. */
/* -------------------------------------------------------------------- */
if( oField.GetType() == OFTInteger )
{
if( oField.GetWidth() > 0 && bPreservePrecision )
snprintf( szFieldType, sizeof(szFieldType), "numeric(%d,0)", oField.GetWidth() );
else
strcpy( szFieldType, "int" );
}
else if( oField.GetType() == OFTInteger64 )
{
if( oField.GetWidth() > 0 && bPreservePrecision )
snprintf( szFieldType, sizeof(szFieldType), "numeric(%d,0)", oField.GetWidth() );
else
strcpy( szFieldType, "bigint" );
}
else if( oField.GetType() == OFTReal )
{
if( oField.GetWidth() > 0 && oField.GetPrecision() > 0
&& bPreservePrecision )
snprintf( szFieldType, sizeof(szFieldType), "numeric(%d,%d)",
oField.GetWidth(), oField.GetPrecision() );
else
strcpy( szFieldType, "float" );
}
else if( oField.GetType() == OFTString )
{
if( oField.GetWidth() == 0 || oField.GetWidth() > 4000 || !bPreservePrecision )
strcpy( szFieldType, "nvarchar(MAX)" );
else
snprintf( szFieldType, sizeof(szFieldType), "nvarchar(%d)", oField.GetWidth() );
}
else if( oField.GetType() == OFTDate )
{
strcpy( szFieldType, "date" );
}
else if( oField.GetType() == OFTTime )
{
strcpy( szFieldType, "time(7)" );
}
else if( oField.GetType() == OFTDateTime )
{
strcpy( szFieldType, "datetime" );
}
else if( oField.GetType() == OFTBinary )
{
strcpy( szFieldType, "image" );
}
else if( bApproxOK )
{
CPLError( CE_Warning, CPLE_NotSupported,
"Can't create field %s with type %s on MSSQL layers. Creating as varchar.",
oField.GetNameRef(),
OGRFieldDefn::GetFieldTypeName(oField.GetType()) );
strcpy( szFieldType, "varchar" );
}
else
{
CPLError( CE_Failure, CPLE_NotSupported,
"Can't create field %s with type %s on MSSQL layers.",
oField.GetNameRef(),
OGRFieldDefn::GetFieldTypeName(oField.GetType()) );
return OGRERR_FAILURE;
}
/* -------------------------------------------------------------------- */
/* Create the new field. */
/* -------------------------------------------------------------------- */
CPLODBCStatement oStmt( poDS->GetSession() );
oStmt.Appendf( "ALTER TABLE [%s].[%s] ADD [%s] %s",
pszSchemaName, pszTableName, oField.GetNameRef(), szFieldType);
if ( !oField.IsNullable() )
{
oStmt.Append(" NOT NULL");
}
if ( oField.GetDefault() != nullptr && !oField.IsDefaultDriverSpecific() )
{
/* process default value specifications */
if ( EQUAL(oField.GetDefault(), "CURRENT_TIME") )
oStmt.Append(" DEFAULT(CONVERT([time],getdate()))");
else if ( EQUAL(oField.GetDefault(), "CURRENT_DATE") )
oStmt.Append( " DEFAULT(CONVERT([date],getdate()))" );
else
oStmt.Appendf(" DEFAULT(%s)", oField.GetDefault());
}
if( !oStmt.ExecuteSQL() )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Error creating field %s, %s", oField.GetNameRef(),
poDS->GetSession()->GetLastError() );
return OGRERR_FAILURE;
}
/* -------------------------------------------------------------------- */
/* Add the field to the OGRFeatureDefn. */
/* -------------------------------------------------------------------- */
poFeatureDefn->AddFieldDefn( &oField );
return OGRERR_NONE;
}
/************************************************************************/
/* ISetFeature() */
/* */
/* SetFeature() is implemented by an UPDATE SQL command */
/************************************************************************/
OGRErr OGRMSSQLSpatialTableLayer::ISetFeature( OGRFeature *poFeature )
{
OGRErr eErr = OGRERR_FAILURE;
poDS->EndCopy();
GetLayerDefn();
if( nullptr == poFeature )
{
CPLError( CE_Failure, CPLE_AppDefined,
"NULL pointer to OGRFeature passed to SetFeature()." );
return eErr;
}
if( poFeature->GetFID() == OGRNullFID )
{
CPLError( CE_Failure, CPLE_AppDefined,
"FID required on features given to SetFeature()." );
return eErr;
}
if( !pszFIDColumn )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Unable to update features in tables without\n"
"a recognised FID column.");
return eErr;
}
ClearStatement();
/* -------------------------------------------------------------------- */
/* Form the UPDATE command. */
/* -------------------------------------------------------------------- */
CPLODBCStatement oStmt( poDS->GetSession() );
oStmt.Appendf( "UPDATE [%s].[%s] SET ", pszSchemaName, pszTableName);
OGRMSSQLGeometryValidator oValidator(poFeature->GetGeometryRef());
OGRGeometry *poGeom = oValidator.GetValidGeometryRef();
if (poFeature->GetGeometryRef() != poGeom)
{
CPLError( CE_Warning, CPLE_NotSupported,
"Geometry with FID = " CPL_FRMT_GIB " has been modified.", poFeature->GetFID() );
}
int nFieldCount = poFeatureDefn->GetFieldCount();
int bind_num = 0;
void** bind_buffer = (void**)CPLMalloc(sizeof(void*) * nFieldCount);
int bNeedComma = FALSE;
SQLLEN nWKBLenBindParameter;
if(poGeom != nullptr && pszGeomColumn != nullptr)
{
oStmt.Appendf( "[%s] = ", pszGeomColumn );
if (nUploadGeometryFormat == MSSQLGEOMETRY_NATIVE)
{
OGRMSSQLGeometryWriter poWriter(poGeom, nGeomColumnType, nSRSId);
int nDataLen = poWriter.GetDataLen();
GByte *pabyData = (GByte *) CPLMalloc(nDataLen + 1);
if (poWriter.WriteSqlGeometry(pabyData, nDataLen) == OGRERR_NONE)
{
char* pszBytes = GByteArrayToHexString( pabyData, nDataLen);
SQLLEN nts = SQL_NTS;
int nRetCode = SQLBindParameter(oStmt.GetStatement(), (SQLUSMALLINT)(bind_num + 1),
SQL_PARAM_INPUT, SQL_C_CHAR, SQL_LONGVARCHAR,
nDataLen, 0, (SQLPOINTER)pszBytes, 0, &nts);
if ( nRetCode == SQL_SUCCESS || nRetCode == SQL_SUCCESS_WITH_INFO )
{
oStmt.Append( "?" );
bind_buffer[bind_num] = pszBytes;
++bind_num;
}
else
{
oStmt.Append( "null" );
CPLFree(pszBytes);
}
}
else
{
oStmt.Append( "null" );
}
CPLFree(pabyData);
}