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qgshanaprovider.cpp
1942 lines (1675 loc) · 63.1 KB
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qgshanaprovider.cpp
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/***************************************************************************
qgshanaprovider.cpp - Data provider for SAP HANA
--------------------------------------
Date : 31-05-2019
Copyright : (C) SAP SE
Author : Maxim Rylov
***************************************************************************/
/***************************************************************************
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
***************************************************************************/
#include "qgis.h"
#include "qgsapplication.h"
#include "qgscoordinatereferencesystem.h"
#include "qgsdataprovider.h"
#include "qgserror.h"
#include "qgsfeature.h"
#include "qgsfields.h"
#include "qgsgeometry.h"
#include "qgshanaconnectionpool.h"
#include "qgshanaexception.h"
#include "qgshanadriver.h"
#include "qgshanafeatureiterator.h"
#include "qgshanaprimarykeys.h"
#include "qgshanaprovider.h"
#include "qgshanaproviderconnection.h"
#include "qgshanaresultset.h"
#include "qgshanacrsutils.h"
#include "qgshanautils.h"
#ifdef HAVE_GUI
#include "qgshanadataitems.h"
#include "qgshanasourceselect.h"
#include "qgssourceselectprovider.h"
#endif
#include "qgslogger.h"
#include "qgsmessagelog.h"
#include "qgsrectangle.h"
#include "odbc/PreparedStatement.h"
#include "odbc/ResultSet.h"
#include "odbc/ResultSetMetaDataUnicode.h"
using namespace odbc;
using namespace std;
namespace
{
bool isQuery( const QString &source )
{
QString trimmed = source.trimmed();
return trimmed.startsWith( '(' ) && trimmed.endsWith( ')' );
}
QString buildQuery( const QString &source, const QString &columns, const QString &where, const QString &orderBy, int limit )
{
if ( isQuery( source ) && columns == QLatin1String( "*" ) && where.isEmpty() && limit <= 0 )
return source;
QString sql = QStringLiteral( "SELECT %1 FROM %2" ).arg( columns, source );
if ( !where.isEmpty() )
sql += QStringLiteral( " WHERE " ) + where;
if ( !orderBy.isEmpty() )
sql += QStringLiteral( " ORDER BY " ) + orderBy;
if ( limit >= 0 )
sql += QStringLiteral( " LIMIT " ) + QString::number( limit );
return sql;
}
void createCoordinateSystem( QgsHanaConnection &conn, const QgsCoordinateReferenceSystem &srs )
{
QString authName;
long srid;
if ( !QgsHanaCrsUtils::identifyCrs( srs, authName, srid ) )
{
QString errorMessage = QObject::tr( "Unable to retrieve the authority identifier for an CRS with id = %1." ).arg( srs.authid() );
throw QgsHanaException( errorMessage.toStdString().c_str() );
}
QgsCoordinateReferenceSystem srsWGS84;
srsWGS84.createFromString( QStringLiteral( "EPSG:4326" ) );
QgsCoordinateTransformContext coordTransCntx;
QgsCoordinateTransform ct( srsWGS84, srs, coordTransCntx );
QgsRectangle bounds = ct.transformBoundingBox( srs.bounds() );
QString units = QgsHanaUtils::toString( srs.mapUnits() );
QString linearUnits = srs.isGeographic() ? QStringLiteral( "NULL" ) : QgsHanaUtils::quotedIdentifier( units );
QString angularUnits = srs.isGeographic() ? QgsHanaUtils::quotedIdentifier( units ) : QStringLiteral( "NULL" ) ;
QString xRange = QStringLiteral( "%1 BETWEEN %2 AND %3" )
.arg( ( srs.isGeographic() ? QStringLiteral( "LONGITUDE" ) : QStringLiteral( "X" ) ),
QString::number( bounds.xMinimum() ), QString::number( bounds.xMaximum() ) );
QString yRange = QStringLiteral( "%1 BETWEEN %2 AND %3" )
.arg( ( srs.isGeographic() ? QStringLiteral( "LATITUDE" ) : QStringLiteral( "Y" ) ),
QString::number( bounds.yMinimum() ), QString::number( bounds.yMaximum() ) );
// create new spatial reference system
QString sql = QStringLiteral( "CREATE SPATIAL REFERENCE SYSTEM %1 "
"IDENTIFIED BY %2 "
"LINEAR UNIT OF MEASURE %3 "
"ANGULAR UNIT OF MEASURE %4 "
"TYPE %5 "
"COORDINATE %6 "
"COORDINATE %7 "
"DEFINITION %8 "
"TRANSFORM DEFINITION %9" )
.arg( QgsHanaUtils::quotedIdentifier( srs.description() ),
QString::number( srid ),
linearUnits,
angularUnits,
srs.isGeographic() ? QStringLiteral( "ROUND EARTH" ) : QStringLiteral( "PLANAR" ),
xRange, yRange,
QgsHanaUtils::quotedString( srs.toWkt() ),
QgsHanaUtils::quotedString( srs.toProj() ) );
QString errorMessage;
conn.execute( sql, &errorMessage );
if ( !errorMessage.isEmpty() )
throw QgsHanaException( errorMessage.toStdString().c_str() );
}
QPair<QString, QString> determinePrimaryKeyColumn( const QgsFields &fields, const QString &keyColumn )
{
int index = fields.indexFromName( keyColumn );
if ( index >= 0 )
{
QgsField field = fields.at( index );
const QgsFieldConstraints &constraints = field.constraints();
if ( constraints.constraintOrigin( QgsFieldConstraints::ConstraintNotNull ) == QgsFieldConstraints::ConstraintOriginProvider &&
constraints.constraintOrigin( QgsFieldConstraints::ConstraintUnique ) == QgsFieldConstraints::ConstraintOriginProvider )
{
if ( QgsHanaUtils::convertField( field ) )
return qMakePair( field.name(), field.typeName() );
}
}
QString primaryKey = keyColumn;
index = 0;
while ( fields.indexFromName( primaryKey ) >= 0 )
{
primaryKey = QStringLiteral( "%1_%2" ).arg( keyColumn ).arg( index++ );
}
return qMakePair( primaryKey, QStringLiteral( "BIGINT" ) );
}
bool isSrsRoundEarth( QgsHanaConnection &conn, int srsId )
{
QString sql = QStringLiteral( "SELECT ROUND_EARTH FROM SYS.ST_SPATIAL_REFERENCE_SYSTEMS WHERE SRS_ID = ?" );
QVariant roundEarth = conn.executeScalar( sql, { srsId} );
return roundEarth.toString() == QLatin1String( "TRUE" );
}
void setStatementValue(
PreparedStatementRef &stmt,
unsigned short paramIndex,
const AttributeField &field,
const QVariant &value )
{
bool isNull = ( value.isNull() || !value.isValid() );
switch ( field.type )
{
case SQLDataTypes::Bit:
case SQLDataTypes::Boolean:
stmt->setBoolean( paramIndex, isNull ? Boolean() : Boolean( value.toBool() ) );
break;
case SQLDataTypes::TinyInt:
if ( field.isSigned )
stmt->setByte( paramIndex, isNull ? Byte() : Byte( static_cast<int8_t>( value.toInt() ) ) );
else
stmt->setUByte( paramIndex, isNull ? UByte() : UByte( static_cast<uint8_t>( value.toUInt() ) ) );
break;
case SQLDataTypes::SmallInt:
if ( field.isSigned )
stmt->setShort( paramIndex, isNull ? Short() : Short( static_cast<int16_t>( value.toInt() ) ) );
else
stmt->setUShort( paramIndex, isNull ? UShort() : UShort( static_cast<uint16_t>( value.toUInt() ) ) );
break;
case SQLDataTypes::Integer:
if ( field.isSigned )
stmt->setInt( paramIndex, isNull ? Int() : Int( value.toInt() ) );
else
stmt->setUInt( paramIndex, isNull ? UInt() : UInt( value.toUInt() ) );
break;
case SQLDataTypes::BigInt:
if ( field.isSigned )
stmt->setLong( paramIndex, isNull ? Long() : Long( value.toLongLong() ) );
else
stmt->setULong( paramIndex, isNull ? ULong() : ULong( value.toULongLong() ) );
break;
case SQLDataTypes::Numeric:
case SQLDataTypes::Decimal:
if ( isNull )
stmt->setDecimal( paramIndex, Decimal() );
else
{
double dvalue = value.toDouble();
stmt->setDouble( paramIndex, Double( dvalue ) );
}
break;
case SQLDataTypes::Real:
stmt->setFloat( paramIndex, isNull ? Float() : Float( value.toFloat() ) );
break;
case SQLDataTypes::Float:
case SQLDataTypes::Double:
stmt->setDouble( paramIndex, isNull ? Double() : Double( value.toDouble() ) );
break;
case SQLDataTypes::Date:
case SQLDataTypes::TypeDate:
if ( isNull )
stmt->setDate( paramIndex, Date() );
else
{
QDate d = value.toDate();
stmt->setDate( paramIndex, makeNullable<date>( d.year(), d.month(), d.day() ) );
}
break;
case SQLDataTypes::Time:
case SQLDataTypes::TypeTime:
if ( isNull )
stmt->setTime( paramIndex, Time() );
else
{
QTime t = value.toTime();
stmt->setTime( paramIndex, makeNullable<odbc::time>( t.hour(), t.minute(), t.second() ) );
}
break;
case SQLDataTypes::Timestamp:
case SQLDataTypes::TypeTimestamp:
if ( isNull )
stmt->setTimestamp( paramIndex, Timestamp() );
else
{
QDateTime dt = value.toDateTime();
QDate d = dt.date();
QTime t = dt.time();
stmt->setTimestamp( paramIndex, makeNullable<odbc::timestamp>( d.year(),
d.month(), d.day(), t.hour(), t.minute(), t.second(), t.msec() ) );
}
break;
case SQLDataTypes::Char:
case SQLDataTypes::VarChar:
case SQLDataTypes::LongVarChar:
stmt->setString( paramIndex, isNull ? String() : String( value.toString().toStdString() ) );
break;
case SQLDataTypes::WChar:
case SQLDataTypes::WVarChar:
case SQLDataTypes::WLongVarChar:
stmt->setNString( paramIndex, isNull ? NString() : NString( value.toString().toStdU16String() ) );
break;
case SQLDataTypes::Binary:
case SQLDataTypes::VarBinary:
case SQLDataTypes::LongVarBinary:
if ( isNull )
stmt->setBinary( paramIndex, Binary() );
else
{
QByteArray arr = value.toByteArray();
stmt->setBinary( paramIndex, Binary( vector<char>( arr.begin(), arr.end() ) ) );
}
break;
default:
if ( field.isGeometry() )
{
if ( value.type() == QVariant::String )
stmt->setString( paramIndex, isNull ? String() : String( value.toString().toStdString() ) );
else if ( value.type() == QVariant::ByteArray )
{
QByteArray arr = value.toByteArray();
stmt->setBinary( paramIndex, isNull ? Binary() : Binary( vector<char>( arr.begin(), arr.end() ) ) );
}
}
else
QgsDebugMsg( QStringLiteral( "Unknown value type ('%1') for parameter %2" )
.arg( QString::number( field.type ), QString::number( paramIndex ) ) );
break;
}
}
void setStatementFidValue(
PreparedStatementRef &stmt,
unsigned short paramIndex,
const AttributeFields &fields,
QgsHanaPrimaryKeyType pkType,
const QList<int> &pkAttrs,
QgsHanaPrimaryKeyContext &pkContext,
QgsFeatureId featureId )
{
switch ( pkType )
{
case QgsHanaPrimaryKeyType::PktInt:
stmt->setInt( paramIndex, QgsHanaPrimaryKeyUtils::fidToInt( featureId ) );
break;
case QgsHanaPrimaryKeyType::PktInt64:
{
QVariantList pkValues = pkContext.lookupKey( featureId );
if ( pkValues.empty() )
throw QgsHanaException( QStringLiteral( "Key values for feature %1 not found." ).arg( featureId ) );
setStatementValue( stmt, paramIndex, fields.at( pkAttrs[0] ), pkValues[0] );
}
break;
case QgsHanaPrimaryKeyType::PktFidMap:
{
QVariantList pkValues = pkContext.lookupKey( featureId );
Q_ASSERT( pkValues.size() == pkAttrs.size() );
if ( pkValues.empty() )
throw QgsHanaException( QStringLiteral( "Key values for feature %1 not found." ).arg( featureId ) );
for ( int i = 0; i < pkAttrs.size(); i++ )
{
const QVariant &value = pkValues[i];
Q_ASSERT( !value.isNull() );
setStatementValue( stmt, static_cast<unsigned short>( paramIndex + i ), fields.at( pkAttrs[i] ), value );
}
}
break;
case QgsHanaPrimaryKeyType::PktUnknown:
// Q_ASSERT( false );
break;
}
}
}
static const size_t MAXIMUM_BATCH_DATA_SIZE = 4 * 1024 * 1024;
const QString QgsHanaProvider::HANA_KEY = QStringLiteral( "hana" );
const QString QgsHanaProvider::HANA_DESCRIPTION = QStringLiteral( "SAP HANA spatial data provider" );
QgsHanaProvider::QgsHanaProvider(
const QString &uri,
const ProviderOptions &options, QgsDataProvider::ReadFlags flags )
: QgsVectorDataProvider( uri, options, flags )
, mUri( uri )
, mFeaturesCount( -1 )
, mPrimaryKeyCntx( new QgsHanaPrimaryKeyContext )
{
mSchemaName = mUri.schema();
mTableName = mUri.table();
mGeometryColumn = mUri.geometryColumn();
mQueryWhereClause = mUri.sql();
mRequestedGeometryType = mUri.wkbType();
mSrid = ( !mUri.srid().isEmpty() ) ? mUri.srid().toInt() : -1;
mSelectAtIdDisabled = mUri.selectAtIdDisabled();
mHasSrsPlanarEquivalent = false;
auto appendError = [this]( const QString & message )
{
this->appendError( QgsErrorMessage( message, QStringLiteral( "SAP HANA" ) ) );
};
if ( mSchemaName.isEmpty() || mTableName.isEmpty() )
{
appendError( tr( "Schema or table name cannot be empty" ) );
return;
}
QgsHanaConnectionRef conn( mUri );
if ( conn.isNull() )
{
appendError( tr( "Connection to database failed" ) );
return;
}
if ( isQuery( mTableName ) )
{
mIsQuery = true;
mQuerySource = mTableName;
mTableName.clear();
}
else
{
mIsQuery = false;
mQuerySource = QStringLiteral( "%1.%2" ).arg(
QgsHanaUtils::quotedIdentifier( mSchemaName ),
QgsHanaUtils::quotedIdentifier( mTableName ) );
}
try
{
if ( !checkPermissionsAndSetCapabilities( *conn ) )
{
appendError( tr( "Provider does not have enough permissions" ) );
return;
}
mDatabaseVersion = QgsHanaUtils::toHANAVersion( conn->getDatabaseVersion() );
readGeometryType( *conn );
readAttributeFields( *conn );
readSrsInformation( *conn );
readMetadata( *conn );
setNativeTypes( conn->getNativeTypes() );
}
catch ( const exception &ex )
{
appendError( QgsHanaUtils::formatErrorMessage( ex.what() ) );
return;
}
mValid = true;
QgsDebugMsgLevel( QStringLiteral( "Connection info is %1" ).arg( QgsHanaUtils::connectionInfo( mUri ) ), 4 );
QgsDebugMsgLevel( QStringLiteral( "Schema is: %1" ).arg( mSchemaName ), 4 );
QgsDebugMsgLevel( QStringLiteral( "Table name is: %1" ).arg( mTableName ), 4 );
QgsDebugMsgLevel( QStringLiteral( "Geometry column is: %1" ).arg( mGeometryColumn ), 4 );
QgsDebugMsgLevel( QStringLiteral( "Query source is: %1" ).arg( mQuerySource ), 4 );
}
QgsAbstractFeatureSource *QgsHanaProvider::featureSource() const
{
return new QgsHanaFeatureSource( this );
}
QString QgsHanaProvider::storageType() const
{
return QObject::tr( "SAP HANA database" );
}
QgsVectorDataProvider::Capabilities QgsHanaProvider::capabilities() const
{
auto capabilities = mCapabilities;
if ( mPrimaryKeyAttrs.isEmpty() )
capabilities &= ~( QgsVectorDataProvider::DeleteFeatures
| QgsVectorDataProvider::ChangeAttributeValues
| QgsVectorDataProvider::ChangeFeatures );
return capabilities;
}
QgsRectangle QgsHanaProvider::extent() const
{
if ( mLayerExtent.isEmpty() )
mLayerExtent = estimateExtent();
return mLayerExtent;
}
void QgsHanaProvider::updateExtents()
{
mLayerExtent.setMinimal();
}
QgsWkbTypes::Type QgsHanaProvider::wkbType() const
{
return mRequestedGeometryType != QgsWkbTypes::Unknown ? mRequestedGeometryType : mDetectedGeometryType;
}
QgsLayerMetadata QgsHanaProvider::layerMetadata() const
{
return mLayerMetadata;
}
QString QgsHanaProvider::dataComment() const
{
return mLayerMetadata.abstract();
}
long QgsHanaProvider::featureCount() const
{
if ( mFeaturesCount >= 0 )
return mFeaturesCount;
try
{
mFeaturesCount = getFeatureCount( mQueryWhereClause );
}
catch ( const QgsHanaException &ex )
{
pushError( tr( "Failed to retrieve feature count: %1" ).arg( ex.what() ) );
}
return mFeaturesCount;
}
QgsFields QgsHanaProvider::fields() const
{
return mFields;
}
// Returns the minimum value of an attribute
QVariant QgsHanaProvider::minimumValue( int index ) const
{
if ( index < 0 || index >= mAttributeFields.count() )
return QVariant();
QgsHanaConnectionRef conn = createConnection();
if ( !conn.isNull() )
{
QString sql = buildQuery( QStringLiteral( "MIN(%1)" ).arg( QgsHanaUtils::quotedIdentifier( mAttributeFields[ index ].name ) ) );
try
{
return conn->executeScalar( sql );
}
catch ( const QgsHanaException &ex )
{
pushError( tr( "Failed to retrieve minimum value: %1" ).arg( ex.what() ) );
}
}
return QVariant( );
}
// Returns the maximum value of an attribute
QVariant QgsHanaProvider::maximumValue( int index ) const
{
if ( index < 0 || index >= mAttributeFields.count() )
return QVariant();
QgsHanaConnectionRef conn = createConnection();
if ( !conn.isNull() )
{
QString sql = buildQuery( QStringLiteral( "MAX(%1)" ).arg( QgsHanaUtils::quotedIdentifier( mAttributeFields[ index ].name ) ) );
try
{
return conn->executeScalar( sql );
}
catch ( const QgsHanaException &ex )
{
pushError( tr( "Failed to retrieve maximum value: %1" ).arg( ex.what() ) );
}
}
return QVariant( );
}
// Returns the list of unique values of an attribute
QSet<QVariant> QgsHanaProvider::uniqueValues( int index, int limit ) const
{
QSet<QVariant> uniqueValues;
if ( index < 0 || index >= mAttributeFields.count() )
return uniqueValues;
QgsHanaConnectionRef conn = createConnection();
if ( !conn.isNull() )
{
QString fieldName = mAttributeFields[ index ].name;
QString sql = buildQuery( QStringLiteral( "DISTINCT %1" ).arg(
QgsHanaUtils::quotedIdentifier( fieldName ) ),
mQueryWhereClause,
QgsHanaUtils::quotedIdentifier( fieldName ),
limit );
try
{
QgsHanaResultSetRef resultSet = conn->executeQuery( sql );
while ( resultSet->next() )
{
uniqueValues.insert( resultSet->getValue( 1 ) );
}
resultSet->close();
}
catch ( const QgsHanaException &ex )
{
pushError( tr( "Failed to retrieve unique values: %1" ).arg( ex.what() ) );
}
}
return uniqueValues;
}
QString QgsHanaProvider::subsetString() const
{
return mQueryWhereClause;
}
bool QgsHanaProvider::setSubsetString( const QString &subset, bool )
{
QString whereClause = subset.trimmed();
if ( whereClause == mQueryWhereClause )
return true;
try
{
getFeatureCount( whereClause );
mQueryWhereClause = whereClause;
}
catch ( const QgsHanaException &ex )
{
pushError( tr( "Failed to retrieve feature count: %1" ).arg( ex.what() ) );
return false;
}
QgsDataSourceUri anUri = QgsDataSourceUri( dataSourceUri() );
anUri.setSql( mQueryWhereClause );
setDataSourceUri( anUri.uri() );
mLayerExtent.setMinimal();
mFeaturesCount = -1;
emit dataChanged();
return true;
}
bool QgsHanaProvider::isValid() const
{
return mValid;
}
QgsFeatureIterator QgsHanaProvider::getFeatures( const QgsFeatureRequest &request ) const
{
return QgsFeatureIterator( new QgsHanaFeatureIterator( new QgsHanaFeatureSource( this ), true, request ) );
}
bool QgsHanaProvider::addFeatures( QgsFeatureList &flist, Flags flags )
{
if ( flist.isEmpty() )
return true;
if ( mIsQuery )
return false;
QgsHanaConnectionRef conn = createConnection();
if ( conn.isNull() )
return false;
// Build insert statement
QStringList columnNames;
QStringList values;
bool isPointDataType = false;
if ( !mGeometryColumn.isEmpty() )
{
QString geometryDataType = conn->getColumnDataType( mSchemaName, mTableName, mGeometryColumn );
isPointDataType = QString::compare( geometryDataType, QStringLiteral( "ST_POINT" ), Qt::CaseInsensitive ) == 0;
columnNames << QgsHanaUtils::quotedIdentifier( mGeometryColumn );
values << QStringLiteral( "ST_GeomFromWKB(?, %1)" ).arg( QString::number( mSrid ) );
}
const QgsAttributes attrs = flist[0].attributes();
QList<int> fieldIds;
QList<bool> pkFields;
for ( int idx = 0; idx < mAttributeFields.count(); ++idx )
{
const AttributeField &field = mAttributeFields.at( idx );
if ( field.name.isEmpty() || field.name == mGeometryColumn )
continue;
if ( mPrimaryKeyAttrs.contains( idx ) )
{
if ( field.isAutoIncrement )
continue;
pkFields << true;
}
else
{
pkFields << false;
}
columnNames << QgsHanaUtils::quotedIdentifier( field.name );
if ( field.isGeometry() && mFields.at( idx ).type() == QVariant::String )
values << QStringLiteral( "ST_GeomFromWKT(?, %1)" ).arg( QString::number( field.srid ) );
else
values << QStringLiteral( "?" );
fieldIds << idx;
}
const bool allowBatchInserts = ( flags & QgsFeatureSink::FastInsert );
const QString sql = QStringLiteral( "INSERT INTO %1.%2(%3) VALUES (%4)" ).arg(
QgsHanaUtils::quotedIdentifier( mSchemaName ), QgsHanaUtils::quotedIdentifier( mTableName ),
columnNames.join( QLatin1Char( ',' ) ), values.join( QLatin1Char( ',' ) ) );
try
{
PreparedStatementRef stmtInsert = conn->prepareStatement( sql );
PreparedStatementRef stmtIdentityValue;
if ( !allowBatchInserts )
{
QString sqlIdentity = QStringLiteral( "SELECT CURRENT_IDENTITY_VALUE() \"current identity value\" FROM %1.%2" )
.arg( QgsHanaUtils::quotedIdentifier( mSchemaName ), QgsHanaUtils::quotedIdentifier( mTableName ) );
stmtIdentityValue = conn->prepareStatement( sqlIdentity );
}
for ( auto &feature : flist )
{
unsigned short paramIndex = 1;
if ( !mGeometryColumn.isEmpty() )
{
if ( feature.hasGeometry() )
{
const QgsGeometry &geom = feature.geometry();
if ( isPointDataType && geom.wkbType() != wkbType() )
{
throw QgsHanaException( tr( "Could not add feature with geometry type %1 to layer of type %2" )
.arg( QgsWkbTypes::displayString( geom.wkbType() ), QgsWkbTypes::displayString( wkbType() ) ).toStdString().c_str() );
}
QByteArray wkb = geom.asWkb();
stmtInsert->setBinary( paramIndex, makeNullable<vector<char>>( wkb.begin(), wkb.end() ) );
}
else
{
stmtInsert->setBinary( paramIndex, Binary() );
}
++paramIndex;
}
bool hasIdValue = false;
const QgsAttributes attrs = feature.attributes();
for ( int i = 0; i < fieldIds.size(); ++i )
{
const int fieldIndex = fieldIds[i];
const AttributeField &field = mAttributeFields.at( fieldIndex );
QVariant attrValue = fieldIndex < attrs.length() ? attrs.at( fieldIndex ) : QVariant( QVariant::LongLong );
if ( pkFields[i] )
{
hasIdValue = hasIdValue || !attrValue.isNull();
if ( !hasIdValue && !field.isNullable )
attrValue = 0;
}
else
{
if ( !field.isNullable && attrValue.isNull() )
attrValue = mDefaultValues[fieldIndex];
}
setStatementValue( stmtInsert, paramIndex, field, attrValue );
++paramIndex;
}
if ( allowBatchInserts )
{
stmtInsert->addBatch();
if ( stmtInsert->getBatchDataSize() >= MAXIMUM_BATCH_DATA_SIZE )
stmtInsert->executeBatch();
}
else
{
stmtInsert->executeUpdate();
stmtInsert->clearParameters();
if ( hasIdValue )
{
if ( mPrimaryKeyType == PktInt )
{
feature.setId( QgsHanaPrimaryKeyUtils::intToFid( attrs.at( mPrimaryKeyAttrs.value( 0 ) ).toInt() ) );
}
else
{
QVariantList primaryKeyVals;
primaryKeyVals.reserve( mPrimaryKeyAttrs.size() );
for ( int idx : std::as_const( mPrimaryKeyAttrs ) )
primaryKeyVals << attrs.at( idx );
feature.setId( mPrimaryKeyCntx->lookupFid( primaryKeyVals ) );
}
}
else
{
ResultSetRef rsIdentity = stmtIdentityValue->executeQuery();
if ( rsIdentity->next() )
{
odbc::Long id = rsIdentity->getLong( 1 );
if ( !id.isNull() )
feature.setId( static_cast<QgsFeatureId>( *id ) );
}
rsIdentity->close();
}
}
}
if ( allowBatchInserts && stmtInsert->getBatchDataSize() > 0 )
stmtInsert->executeBatch();
conn->commit();
mFeaturesCount = -1;
return true;
}
catch ( const exception &ex )
{
pushError( tr( "Failed to add features: %1" )
.arg( QgsHanaUtils::formatErrorMessage( ex.what() ) ) );
conn->rollback();
}
return false;
}
bool QgsHanaProvider::deleteFeatures( const QgsFeatureIds &ids )
{
if ( mPrimaryKeyAttrs.isEmpty() )
return false;
if ( mIsQuery )
{
QgsDebugMsg( QStringLiteral( "Cannot delete features (is a query)" ) );
return false;
}
if ( ids.empty() )
return true; // for consistency providers return true to an empty list
QgsHanaConnectionRef conn = createConnection();
if ( conn.isNull() )
return false;
const QString featureIdsWhereClause = QgsHanaPrimaryKeyUtils::buildWhereClause( ids, mFields, mPrimaryKeyType, mPrimaryKeyAttrs, *mPrimaryKeyCntx );
if ( featureIdsWhereClause.isEmpty() )
{
pushError( tr( "Failed to delete features: Unable to find feature ids" ) );
return false;
}
const QString sql = QStringLiteral( "DELETE FROM %1.%2 WHERE %3" ).arg(
QgsHanaUtils::quotedIdentifier( mSchemaName ), QgsHanaUtils::quotedIdentifier( mTableName ),
featureIdsWhereClause );
try
{
conn->execute( sql );
conn->commit();
}
catch ( const QgsHanaException &ex )
{
pushError( tr( "Failed to delete features: %1" ).arg( ex.what() ) );
conn->rollback();
return false;
}
mFeaturesCount = -1;
return true;
}
bool QgsHanaProvider::truncate()
{
if ( mIsQuery )
{
QgsDebugMsg( QStringLiteral( "Cannot truncate (is a query)" ) );
return false;
}
QgsHanaConnectionRef conn = createConnection();
if ( conn.isNull() )
return false;
QString sql = QStringLiteral( "TRUNCATE TABLE %1.%2" ).arg(
QgsHanaUtils::quotedIdentifier( mSchemaName ), QgsHanaUtils::quotedIdentifier( mTableName ) );
try
{
conn->execute( sql );
conn->commit();
}
catch ( const QgsHanaException &ex )
{
pushError( tr( "Failed to truncate: %1" ).arg( ex.what() ) );
conn->rollback();
return false;
}
return true;
}
bool QgsHanaProvider::addAttributes( const QList<QgsField> &attributes )
{
if ( attributes.isEmpty() )
return true;
QgsHanaConnectionRef conn = createConnection();
if ( conn.isNull() )
return false;
QString columnDefs;
for ( const QgsField &field : attributes )
{
if ( !columnDefs.isEmpty() )
columnDefs += QLatin1Char( ',' );
columnDefs += QgsHanaUtils::quotedIdentifier( field.name() ) + QStringLiteral( " " ) + field.typeName();
if ( !field.comment().isEmpty() )
columnDefs += QStringLiteral( " COMMENT " ) + QgsHanaUtils::quotedString( field.comment() );
}
QString sql = QStringLiteral( "ALTER TABLE %1.%2 ADD (%3)" ).arg(
QgsHanaUtils::quotedIdentifier( mSchemaName ), QgsHanaUtils::quotedIdentifier( mTableName ), columnDefs );
try
{
conn->execute( sql );
conn->commit();
}
catch ( const QgsHanaException &ex )
{
pushError( tr( "Failed to add feature: %1" ).arg( ex.what() ) );
conn->rollback();
return false;
}
try
{
readAttributeFields( *conn );
}
catch ( const exception &ex )
{
pushError( tr( "Failed to read attributes: %1" )
.arg( QgsHanaUtils::formatErrorMessage( ex.what() ) ) );
}
return true;
}
bool QgsHanaProvider::deleteAttributes( const QgsAttributeIds &attributes )
{
if ( attributes.isEmpty() )
return false;
QgsHanaConnectionRef conn = createConnection();
if ( conn.isNull() )
return false;
QString columnNames;
for ( int attrId : attributes )
{
if ( !columnNames.isEmpty() )
columnNames += QLatin1Char( ',' );
const AttributeField &field = mAttributeFields.at( attrId );
columnNames += QgsHanaUtils::quotedIdentifier( field.name );
}
QString sql = QStringLiteral( "ALTER TABLE %1.%2 DROP (%3)" ).arg(
QgsHanaUtils::quotedIdentifier( mSchemaName ), QgsHanaUtils::quotedIdentifier( mTableName ), columnNames );
try
{
conn->execute( sql );
conn->commit();
}
catch ( const QgsHanaException &ex )
{
pushError( tr( "Failed to delete attributes: %1" )
.arg( QgsHanaUtils::formatErrorMessage( ex.what() ) ) );
conn->rollback();
return false;
}
try
{
readAttributeFields( *conn );
}
catch ( const exception &ex )
{
pushError( tr( "Failed to read attributes: %1" )
.arg( QgsHanaUtils::formatErrorMessage( ex.what() ) ) );
}
return true;
}
bool QgsHanaProvider::renameAttributes( const QgsFieldNameMap &fieldMap )
{
if ( mIsQuery )
return false;
QgsHanaConnectionRef conn = createConnection();
if ( conn.isNull() )
return false;
QSet<QPair<QString, QString>> renameCandidates;
for ( QgsFieldNameMap::const_iterator it = fieldMap.begin(); it != fieldMap.end(); ++it )
{
int fieldIndex = it.key();
if ( fieldIndex < 0 || fieldIndex >= mAttributeFields.count() )
{
pushError( tr( "Invalid attribute index: %1" ).arg( fieldIndex ) );
return false;
}
QString fromName = mAttributeFields.at( fieldIndex ).name;
QString toName = it.value();
if ( fromName == toName )
continue;
renameCandidates.insert( {fromName, toName} );
}
if ( renameCandidates.empty() )
return true;
QSet<QString> resultFieldNames;
for ( int i = 0; i < mAttributeFields.count(); ++i )
resultFieldNames.insert( mAttributeFields[i].name );
// Ordered list of renaming pairs
QList<QPair<QString, QString>> fieldsToRename;
while ( !renameCandidates.empty() )
{
bool found = false;
for ( const QPair<QString, QString> &candidate : std::as_const( renameCandidates ) )