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oracle provider: use prepared statements with parameters (implements #…

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jef-n committed Mar 2, 2017
1 parent 09e1c8c commit fb409b59a9ab2e748372cf1b0e346cc24144ee7f
@@ -2920,20 +2920,20 @@ void QOCISpatialCols::getValues( QVector<QVariant> &v, int index )

QOCISpatialResultPrivate::QOCISpatialResultPrivate( QOCISpatialResult *q, const QOCISpatialDriver *drv )
: QSqlCachedResultPrivate( q, drv )
, cols( 0 )
, cols( nullptr )
, env( drv_d_func()->env )
, err( 0 )
, err( nullptr )
, svc( const_cast<OCISvcCtx*&>( drv_d_func()->svc ) )
, sql( 0 )
, sql( nullptr )
, sdoobj()
, sdoind()
, transaction( drv_d_func()->transaction )
, serverVersion( drv_d_func()->serverVersion )
, prefetchRows( drv_d_func()->prefetchRows )
, prefetchMem( drv_d_func()->prefetchMem )
, geometryTDO( drv_d_func()->geometryTDO )
, geometryObj( 0 )
, geometryInd( 0 )
, geometryObj( nullptr )
, geometryInd( nullptr )
{
ENTER
int r = OCIHandleAlloc( env,
@@ -2960,7 +2960,14 @@ QOCISpatialResultPrivate::~QOCISpatialResultPrivate()

r = OCIHandleFree( err, OCI_HTYPE_ERROR );
if ( r != OCI_SUCCESS )
qWarning( "~QOCISpatialResult: unable to free statement handle" );
qWarning( "~QOCISpatialResult: unable to free error handle" );

if ( sql )
{
r = OCIHandleFree( sql, OCI_HTYPE_STMT );
if ( r != OCI_SUCCESS )
qWarning( "~QOCISpatialResult: unable to free statement handle" );
}
}


@@ -3009,6 +3016,7 @@ bool QOCISpatialResult::gotoNext( QSqlCachedResult::ValueCache &values, int inde
break;
case OCI_SUCCESS_WITH_INFO:
qOraWarning( "QOCISpatialResult::gotoNext: SuccessWithInfo: ", d->err );
qDebug() << "QOCISpatialResult::gotoNext: statement " << lastQuery();
r = OCI_SUCCESS; //ignore it
break;
case OCI_NO_DATA:
@@ -3114,6 +3122,7 @@ bool QOCISpatialResult::prepare( const QString& query )
r = OCIHandleFree( d->sql, OCI_HTYPE_STMT );
if ( r != OCI_SUCCESS )
qOraWarning( "QOCISpatialResult::prepare: unable to free statement handle:", d->err );
d->sql = nullptr;
}
if ( query.isEmpty() )
return false;
@@ -123,7 +123,7 @@ QgsOracleConn::QgsOracleConn( QgsDataSourceUri uri )
{
QSqlQuery qry( mDatabase );

if ( !qry.exec( QString( "BEGIN\nDBMS_WM.GotoWorkspace(%1);\nEND;" ).arg( quotedValue( workspace ) ) ) )
if ( !qry.prepare( QString( "BEGIN\nDBMS_WM.GotoWorkspace(?);\nEND;" ) ) || !( qry.addBindValue( workspace ), qry.exec() ) )
{
mDatabase.close();
QgsMessageLog::logMessage( tr( "Could not switch to workspace %1 [%2]" ).arg( workspace, qry.lastError().databaseText() ), tr( "Oracle" ) );
@@ -172,11 +172,22 @@ void QgsOracleConn::disconnect()
deleteLater();
}

bool QgsOracleConn::exec( QSqlQuery &qry, QString sql )
bool QgsOracleConn::exec( QSqlQuery &qry, QString sql, const QVariantList &params )
{
QgsDebugMsgLevel( QString( "SQL: %1" ).arg( sql ), 4 );

bool res = qry.exec( sql );
bool res = qry.prepare( sql );
if ( res )
{
for ( const auto &param: params )
{
QgsDebugMsgLevel( QString( " ARG: %1 [%2]" ).arg( param.toString() ).arg( param.typeName() ), 4 );
qry.addBindValue( param );
}

res = qry.exec();
}

if ( !res )
{
QgsDebugMsg( QString( "SQL: %1\nERROR: %2" )
@@ -192,10 +203,10 @@ QStringList QgsOracleConn::pkCandidates( QString ownerName, QString viewName )
QStringList cols;

QSqlQuery qry( mDatabase );
if ( !exec( qry, QString( "SELECT column_name FROM all_tab_columns WHERE owner=%1 AND table_name=%2 ORDER BY column_id" )
.arg( quotedValue( ownerName ) ).arg( quotedValue( viewName ) ) ) )
if ( !exec( qry, QString( "SELECT column_name FROM all_tab_columns WHERE owner=? AND table_name=? ORDER BY column_id" ),
QVariantList() << ownerName << viewName ) )
{
QgsMessageLog::logMessage( tr( "SQL:%1\nerror:%2\n" ).arg( qry.lastQuery() ).arg( qry.lastError().text() ), tr( "Oracle" ) );
QgsMessageLog::logMessage( tr( "SQL:%1 [owner:%2 table_name:%3]\nerror:%4\n" ).arg( qry.lastQuery(), qry.lastError().text(), ownerName, viewName ), tr( "Oracle" ) );
return cols;
}

@@ -242,7 +253,7 @@ bool QgsOracleConn::tableInfo( bool geometryColumnsOnly, bool userTablesOnly, bo
// sql += " ORDER BY owner,isview,table_name,column_name";

QSqlQuery qry( mDatabase );
if ( !exec( qry, sql ) )
if ( !exec( qry, sql, QVariantList() ) )
{
QgsMessageLog::logMessage( tr( "Querying available tables failed.\nSQL:%1\nerror:%2\n" ).arg( qry.lastQuery() ).arg( qry.lastError().text() ), tr( "Oracle" ) );
return false;
@@ -451,7 +462,7 @@ void QgsOracleConn::retrieveLayerTypes( QgsOracleLayerProperty &layerProperty, b
if ( !exec( qry, sql
.arg( quotedIdentifier( layerProperty.geometryColName ) )
.arg( table )
.arg( where.isEmpty() ? "" : QString( " AND (%1)" ).arg( where ) ) ) )
.arg( where.isEmpty() ? "" : QString( " AND (%1)" ).arg( where ) ), QVariantList() ) )
{
QgsMessageLog::logMessage( tr( "SQL:%1\nerror:%2\n" )
.arg( qry.lastQuery() )
@@ -809,7 +820,7 @@ bool QgsOracleConn::hasSpatial()
if ( mHasSpatial == -1 )
{
QSqlQuery qry( mDatabase );
mHasSpatial = exec( qry, "SELECT 1 FROM v$option WHERE parameter='Spatial' AND value='TRUE'" ) && qry.next();
mHasSpatial = exec( qry, "SELECT 1 FROM v$option WHERE parameter='Spatial' AND value='TRUE'", QVariantList() ) && qry.next();
}

return mHasSpatial;
@@ -820,7 +831,7 @@ QString QgsOracleConn::currentUser()
if ( mCurrentUser.isNull() )
{
QSqlQuery qry( mDatabase );
if ( exec( qry, "SELECT user FROM dual" ) && qry.next() )
if ( exec( qry, "SELECT user FROM dual", QVariantList() ) && qry.next() )
{
mCurrentUser = qry.value( 0 ).toString();
}
@@ -24,6 +24,7 @@
#include <QMap>
#include <QSet>
#include <QThread>
#include <QVariant>

#include "qgis.h"
#include "qgsdatasourceuri.h"
@@ -172,7 +173,7 @@ class QgsOracleConn : public QObject
explicit QgsOracleConn( QgsDataSourceUri uri );
~QgsOracleConn();

bool exec( QSqlQuery &qry, QString sql );
bool exec( QSqlQuery &qry, QString sql, const QVariantList &params );

//! reference count
int mRef;
@@ -38,6 +38,7 @@ QgsOracleFeatureIterator::QgsOracleFeatureIterator( QgsOracleFeatureSource* sour
return;
}

QVariantList args;
mQry = QSqlQuery( *mConnection );

if ( mRequest.flags() & QgsFeatureRequest::SubsetOfAttributes )
@@ -79,17 +80,15 @@ QgsOracleFeatureIterator::QgsOracleFeatureIterator( QgsOracleFeatureSource* sour
if ( mSource->mHasSpatialIndex )
{
QgsRectangle rect( mRequest.filterRect() );
QString bbox = QString( "mdsys.sdo_geometry(2003,%1,NULL,"
"mdsys.sdo_elem_info_array(1,1003,3),"
"mdsys.sdo_ordinate_array(%2,%3,%4,%5)"
")" )
.arg( mSource->mSrid < 1 ? "NULL" : QString::number( mSource->mSrid ) )
.arg( qgsDoubleToString( rect.xMinimum() ) )
.arg( qgsDoubleToString( rect.yMinimum() ) )
.arg( qgsDoubleToString( rect.xMaximum() ) )
.arg( qgsDoubleToString( rect.yMaximum() ) );

whereClause = QString( "sdo_filter(%1,%2)='TRUE'" ).arg( QgsOracleProvider::quotedIdentifier( mSource->mGeometryColumn ) ).arg( bbox );
QString bbox = QStringLiteral( "mdsys.sdo_geometry(2003,?,NULL,"
"mdsys.sdo_elem_info_array(1,1003,3),"
"mdsys.sdo_ordinate_array(?,?,?,?)"
")" );

whereClause = QStringLiteral( "sdo_filter(%1,%2)='TRUE'" )
.arg( QgsOracleProvider::quotedIdentifier( mSource->mGeometryColumn ) ).arg( bbox );

args << ( mSource->mSrid < 1 ? QVariant( QVariant::Int ) : mSource->mSrid ) << rect.xMinimum() << rect.yMinimum() << rect.xMaximum() << rect.yMaximum();

if (( mRequest.flags() & QgsFeatureRequest::ExactIntersect ) != 0 )
{
@@ -99,6 +98,7 @@ QgsOracleFeatureIterator::QgsOracleFeatureIterator( QgsOracleFeatureSource* sour
whereClause += QString( " AND sdo_relate(%1,%2,'mask=ANYINTERACT')='TRUE'" )
.arg( QgsOracleProvider::quotedIdentifier( mSource->mGeometryColumn ) )
.arg( bbox );
args << ( mSource->mSrid < 1 ? QVariant( QVariant::Int ) : mSource->mSrid ) << rect.xMinimum() << rect.yMinimum() << rect.xMaximum() << rect.yMaximum();
}
else
{
@@ -123,14 +123,14 @@ QgsOracleFeatureIterator::QgsOracleFeatureIterator( QgsOracleFeatureSource* sour
{
case QgsFeatureRequest::FilterFid:
{
QString fidWhereClause = QgsOracleUtils::whereClause( mRequest.filterFid(), mSource->mFields, mSource->mPrimaryKeyType, mSource->mPrimaryKeyAttrs, mSource->mShared );
QString fidWhereClause = QgsOracleUtils::whereClause( mRequest.filterFid(), mSource->mFields, mSource->mPrimaryKeyType, mSource->mPrimaryKeyAttrs, mSource->mShared, args );
whereClause = QgsOracleUtils::andWhereClauses( whereClause, fidWhereClause );
}
break;

case QgsFeatureRequest::FilterFids:
{
QString fidsWhereClause = QgsOracleUtils::whereClause( mRequest.filterFids(), mSource->mFields, mSource->mPrimaryKeyType, mSource->mPrimaryKeyAttrs, mSource->mShared );
QString fidsWhereClause = QgsOracleUtils::whereClause( mRequest.filterFids(), mSource->mFields, mSource->mPrimaryKeyType, mSource->mPrimaryKeyAttrs, mSource->mShared, args );
whereClause = QgsOracleUtils::andWhereClauses( whereClause, fidsWhereClause );
}
break;
@@ -205,14 +205,15 @@ QgsOracleFeatureIterator::QgsOracleFeatureIterator( QgsOracleFeatureSource* sour
if ( !whereClause.isEmpty() )
whereClause += " AND ";

whereClause += QString( "rownum<=%1" ).arg( mRequest.limit() );
fallbackStatement += QString( "rownum<=%1" ).arg( mRequest.limit() );
whereClause += QStringLiteral( "rownum<=?" );
fallbackStatement += QStringLiteral( "rownum<=?" );
args << QVariant::fromValue( mRequest.limit() );
}

bool result = openQuery( whereClause, !useFallback );
bool result = openQuery( whereClause, args, !useFallback );
if ( !result && useFallback )
{
result = openQuery( fallbackStatement );
result = openQuery( fallbackStatement, args );
if ( result )
{
mExpressionCompiled = false;
@@ -249,7 +250,7 @@ bool QgsOracleFeatureIterator::fetchFeature( QgsFeature& feature )
if ( mRewind )
{
mRewind = false;
if ( !QgsOracleProvider::exec( mQry, mSql ) )
if ( !QgsOracleProvider::exec( mQry, mSql, mArgs ) )
{
QgsMessageLog::logMessage( QObject::tr( "Fetching features failed.\nSQL:%1\nError: %2" )
.arg( mQry.lastQuery() )
@@ -418,14 +419,14 @@ bool QgsOracleFeatureIterator::close()

if ( mConnection )
QgsOracleConnPool::instance()->releaseConnection( mConnection );
mConnection = 0;
mConnection = nullptr;

iteratorClosed();

return true;
}

bool QgsOracleFeatureIterator::openQuery( QString whereClause, bool showLog )
bool QgsOracleFeatureIterator::openQuery( QString whereClause, QVariantList args, bool showLog )
{
try
{
@@ -478,7 +479,8 @@ bool QgsOracleFeatureIterator::openQuery( QString whereClause, bool showLog )

QgsDebugMsg( QString( "Fetch features: %1" ).arg( query ) );
mSql = query;
if ( !QgsOracleProvider::exec( mQry, query ) )
mArgs = args;
if ( !QgsOracleProvider::exec( mQry, query, args ) )
{
if ( showLog )
{
@@ -70,7 +70,7 @@ class QgsOracleFeatureIterator : public QgsAbstractFeatureIteratorFromSource<Qgs
virtual bool fetchFeature( QgsFeature& feature ) override;
bool nextFeatureFilterExpression( QgsFeature& f ) override;

bool openQuery( QString whereClause, bool showLog = true );
bool openQuery( QString whereClause, QVariantList args, bool showLog = true );

QgsOracleConn *mConnection = nullptr;
QSqlQuery mQry;
@@ -79,6 +79,7 @@ class QgsOracleFeatureIterator : public QgsAbstractFeatureIteratorFromSource<Qgs
bool mFetchGeometry;
QgsAttributeList mAttributeList;
QString mSql;
QVariantList mArgs;
};

#endif // QGSORACLEFEATUREITERATOR_H

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