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qgsmssqlprovider.cpp
1797 lines (1548 loc) · 48.6 KB
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qgsmssqlprovider.cpp
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/***************************************************************************
qgsmssqlprovider.cpp - Data provider for mssql server
-------------------
begin : 2011-10-08
copyright : (C) 2011 by Tamas Szekeres
email : szekerest at gmail.com
***************************************************************************/
/***************************************************************************
* *
* 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 "qgsmssqlprovider.h"
#include <QtGlobal>
#include <QFileInfo>
#include <QDataStream>
#include <QStringList>
#include <QMessageBox>
#include <QSettings>
#include <QRegExp>
#include <QUrl>
#include <QtSql/QSqlDatabase>
#include <QtSql/QSqlQuery>
#include <QtSql/QSqlError>
#include <QtSql/QSqlRecord>
#include <QtSql/QSqlField>
#include <QStringBuilder>
#include <QWaitCondition>
#include "qgsapplication.h"
#include "qgsdataprovider.h"
#include "qgsfeature.h"
#include "qgsfield.h"
#include "qgsgeometry.h"
#include "qgslogger.h"
#include "qgsmessageoutput.h"
#include "qgsrectangle.h"
#include "qgis.h"
#include "qgsmssqlsourceselect.h"
#include "qgsmssqldataitems.h"
#include "qgsmssqlfeatureiterator.h"
static const QString TEXT_PROVIDER_KEY = "mssql";
static const QString TEXT_PROVIDER_DESCRIPTION = "MSSQL spatial data provider";
QgsMssqlProvider::QgsMssqlProvider( QString uri )
: QgsVectorDataProvider( uri )
, mCrs()
, mWkbType( QGis::WKBUnknown )
{
QgsDataSourceURI anUri = QgsDataSourceURI( uri );
if ( !anUri.srid().isEmpty() )
mSRId = anUri.srid().toInt();
else
mSRId = -1;
mWkbType = anUri.wkbType();
mValid = true;
mUseWkb = false;
mSkipFailures = false;
mUseEstimatedMetadata = anUri.useEstimatedMetadata();
mSqlWhereClause = anUri.sql();
mDatabase = GetDatabase( anUri.service(), anUri.host(), anUri.database(), anUri.username(), anUri.password() );
if ( !OpenDatabase( mDatabase ) )
{
setLastError( mDatabase.lastError( ).text( ) );
mValid = false;
return;
}
// Create a query for default connection
mQuery = QSqlQuery( mDatabase );
// Database successfully opened; we can now issue SQL commands.
if ( !anUri.schema().isEmpty() )
mSchemaName = anUri.schema();
else
mSchemaName = "dbo";
if ( !anUri.table().isEmpty() )
{
// the layer name has been specified
mTableName = anUri.table();
QStringList sl = mTableName.split( '.' );
if ( sl.length() == 2 )
{
mSchemaName = sl[0];
mTableName = sl[1];
}
mTables = QStringList( mTableName );
}
else
{
// Get a list of table
mTables = mDatabase.tables( QSql::Tables );
if ( mTables.count() > 0 )
mTableName = mTables[0];
else
mValid = false;
}
if ( mValid )
{
if ( !anUri.keyColumn().isEmpty() )
mFidColName = anUri.keyColumn();
if ( !anUri.geometryColumn().isEmpty() )
mGeometryColName = anUri.geometryColumn();
if ( mSRId < 0 || mWkbType == QGis::WKBUnknown || mGeometryColName.isEmpty() )
loadMetadata();
loadFields();
UpdateStatistics( mUseEstimatedMetadata );
if ( mGeometryColName.isEmpty() )
{
// table contains no geometries
mWkbType = QGis::WKBNoGeometry;
mSRId = 0;
}
}
//fill type names into sets
mNativeTypes
// integer types
<< QgsVectorDataProvider::NativeType( tr( "8 Bytes integer" ), "bigint", QVariant::Int )
<< QgsVectorDataProvider::NativeType( tr( "4 Bytes integer" ), "int", QVariant::Int )
<< QgsVectorDataProvider::NativeType( tr( "2 Bytes integer" ), "smallint", QVariant::Int )
<< QgsVectorDataProvider::NativeType( tr( "1 Bytes integer" ), "tinyint", QVariant::Int )
<< QgsVectorDataProvider::NativeType( tr( "Decimal number (numeric)" ), "numeric", QVariant::Double, 1, 20, 0, 20 )
<< QgsVectorDataProvider::NativeType( tr( "Decimal number (decimal)" ), "decimal", QVariant::Double, 1, 20, 0, 20 )
// floating point
<< QgsVectorDataProvider::NativeType( tr( "Decimal number (real)" ), "real", QVariant::Double )
<< QgsVectorDataProvider::NativeType( tr( "Decimal number (double)" ), "float", QVariant::Double )
// string types
<< QgsVectorDataProvider::NativeType( tr( "Text, fixed length (char)" ), "char", QVariant::String, 1, 255 )
<< QgsVectorDataProvider::NativeType( tr( "Text, limited variable length (varchar)" ), "varchar", QVariant::String, 1, 255 )
<< QgsVectorDataProvider::NativeType( tr( "Text, fixed length unicode (nchar)" ), "nchar", QVariant::String, 1, 255 )
<< QgsVectorDataProvider::NativeType( tr( "Text, limited variable length unicode (nvarchar)" ), "nvarchar", QVariant::String, 1, 255 )
<< QgsVectorDataProvider::NativeType( tr( "Text, unlimited length (text)" ), "text", QVariant::String )
<< QgsVectorDataProvider::NativeType( tr( "Text, unlimited length unicode (ntext)" ), "text", QVariant::String )
;
}
QgsMssqlProvider::~QgsMssqlProvider()
{
}
QgsFeatureIterator QgsMssqlProvider::getFeatures( const QgsFeatureRequest& request )
{
if ( !mValid )
{
QgsDebugMsg( "Read attempt on an invalid mssql data source" );
return QgsFeatureIterator();
}
return QgsFeatureIterator( new QgsMssqlFeatureIterator( this, request ) );
}
bool QgsMssqlProvider::OpenDatabase( QSqlDatabase db )
{
if ( !db.isOpen() )
{
if ( !db.open() )
{
return false;
}
}
return true;
}
QSqlDatabase QgsMssqlProvider::GetDatabase( QString driver, QString host, QString database, QString username, QString password )
{
QSqlDatabase db;
QString connectionName;
if ( driver.isEmpty() )
{
if ( host.isEmpty() )
{
QgsDebugMsg( "QgsMssqlProvider host name not specified" );
return db;
}
if ( database.isEmpty() )
{
QgsDebugMsg( "QgsMssqlProvider database name not specified" );
return db;
}
connectionName = host + "." + database;
}
else
connectionName = driver;
if ( !QSqlDatabase::contains( connectionName ) )
db = QSqlDatabase::addDatabase( "QODBC", connectionName );
else
db = QSqlDatabase::database( connectionName );
db.setHostName( host );
QString connectionString = "";
if ( !driver.isEmpty() )
{
// driver was specified explicitly
connectionString = driver;
}
else
{
#ifdef WIN32
connectionString = "driver={SQL Server}";
#else
connectionString = "driver={FreeTDS};port=1433";
#endif
}
if ( !host.isEmpty() )
connectionString += ";server=" + host;
if ( !database.isEmpty() )
connectionString += ";database=" + database;
if ( password.isEmpty() )
connectionString += ";trusted_connection=yes";
else
connectionString += ";uid=" + username + ";pwd=" + password;
if ( !username.isEmpty() )
db.setUserName( username );
if ( !password.isEmpty() )
db.setPassword( password );
db.setDatabaseName( connectionString );
return db;
}
QVariant::Type QgsMssqlProvider::DecodeSqlType( QString sqlTypeName )
{
QVariant::Type type = QVariant::Invalid;
if ( sqlTypeName.startsWith( "decimal", Qt::CaseInsensitive ) ||
sqlTypeName.startsWith( "numeric", Qt::CaseInsensitive ) ||
sqlTypeName.startsWith( "real", Qt::CaseInsensitive ) ||
sqlTypeName.startsWith( "float", Qt::CaseInsensitive ) )
{
type = QVariant::Double;
}
else if ( sqlTypeName.startsWith( "char", Qt::CaseInsensitive ) ||
sqlTypeName.startsWith( "nchar", Qt::CaseInsensitive ) ||
sqlTypeName.startsWith( "varchar", Qt::CaseInsensitive ) ||
sqlTypeName.startsWith( "nvarchar", Qt::CaseInsensitive ) ||
sqlTypeName.startsWith( "text", Qt::CaseInsensitive ) ||
sqlTypeName.startsWith( "ntext", Qt::CaseInsensitive ) )
{
type = QVariant::String;
}
else if ( sqlTypeName.startsWith( "smallint", Qt::CaseInsensitive ) ||
sqlTypeName.startsWith( "int", Qt::CaseInsensitive ) ||
sqlTypeName.startsWith( "bit", Qt::CaseInsensitive ) ||
sqlTypeName.startsWith( "tinyint", Qt::CaseInsensitive ) )
{
type = QVariant::Int;
}
else if ( sqlTypeName.startsWith( "bigint", Qt::CaseInsensitive ) )
{
type = QVariant::LongLong;
}
else if ( sqlTypeName.startsWith( "binary", Qt::CaseInsensitive ) ||
sqlTypeName.startsWith( "varbinary", Qt::CaseInsensitive ) ||
sqlTypeName.startsWith( "image", Qt::CaseInsensitive ) )
{
type = QVariant::ByteArray;
}
else if ( sqlTypeName.startsWith( "date", Qt::CaseInsensitive ) )
{
type = QVariant::String;
}
else if ( sqlTypeName.startsWith( "datetime", Qt::CaseInsensitive ) ||
sqlTypeName.startsWith( "smalldatetime", Qt::CaseInsensitive ) ||
sqlTypeName.startsWith( "datetime2", Qt::CaseInsensitive ) )
{
type = QVariant::String;
}
else if ( sqlTypeName.startsWith( "time", Qt::CaseInsensitive ) ||
sqlTypeName.startsWith( "timestamp", Qt::CaseInsensitive ) )
{
type = QVariant::String;
}
else
{
QgsDebugMsg( QString( "Unknown field type: %1" ).arg( sqlTypeName ) );
}
return type;
}
void QgsMssqlProvider::loadMetadata()
{
mSRId = 0;
mWkbType = QGis::WKBUnknown;
QSqlQuery query = QSqlQuery( mDatabase );
query.setForwardOnly( true );
if ( !query.exec( QString( "select f_geometry_column, coord_dimension, srid, geometry_type from geometry_columns where f_table_schema = '%1' and f_table_name = '%2'" ).arg( mSchemaName ).arg( mTableName ) ) )
{
QString msg = query.lastError().text();
QgsDebugMsg( msg );
}
if ( query.isActive() )
{
if ( query.next() )
{
mGeometryColName = query.value( 0 ).toString();
mSRId = query.value( 2 ).toInt();
mWkbType = getWkbType( query.value( 3 ).toString(), query.value( 1 ).toInt() );
}
}
}
void QgsMssqlProvider::loadFields()
{
mAttributeFields.clear();
mDefaultValues.clear();
// get field spec
QSqlQuery query = QSqlQuery( mDatabase );
query.setForwardOnly( true );
if ( !query.exec( QString( "exec sp_columns N'%1', NULL, NULL, NULL, NULL" ).arg( mTableName ) ) )
{
QString msg = query.lastError().text();
QgsDebugMsg( msg );
return;
}
if ( query.isActive() )
{
int i = 0;
QStringList pkCandidates;
while ( query.next() )
{
QString sqlTypeName = query.value( 5 ).toString();
if ( sqlTypeName == "geometry" || sqlTypeName == "geography" )
{
mGeometryColName = query.value( 3 ).toString();
mGeometryColType = sqlTypeName;
parser.IsGeography = sqlTypeName == "geography";
}
else
{
QVariant::Type sqlType = DecodeSqlType( sqlTypeName );
if ( sqlTypeName == "int identity" || sqlTypeName == "bigint identity" )
mFidColName = query.value( 3 ).toString();
else if ( sqlTypeName == "int" || sqlTypeName == "bigint" )
{
pkCandidates << query.value( 3 ).toString();
}
if ( sqlType == QVariant::String )
{
mAttributeFields.append(
QgsField(
query.value( 3 ).toString(), sqlType,
sqlTypeName,
query.value( 7 ).toInt() ) );
}
else
{
mAttributeFields.append(
QgsField(
query.value( 3 ).toString(), sqlType,
sqlTypeName ) );
}
if ( !query.value( 12 ).isNull() )
{
mDefaultValues.insert( i, query.value( 12 ) );
}
++i;
}
}
// get primary key
if ( mFidColName.isEmpty() )
{
query.clear();
query.setForwardOnly( true );
if ( !query.exec( QString( "exec sp_pkeys N'%1', NULL, NULL" ).arg( mTableName ) ) )
{
QString msg = query.lastError().text();
QgsDebugMsg( msg );
}
if ( query.isActive() )
{
if ( query.next() )
{
mFidColName = query.value( 3 ).toString();
return;
}
}
foreach ( QString pk, pkCandidates )
{
query.clear();
query.setForwardOnly( true );
if ( !query.exec( QString( "select count(distinct [%1]), count([%1]) from [%2].[%3]" )
.arg( pk )
.arg( mSchemaName )
.arg( mTableName ) ) )
{
QString msg = query.lastError().text();
QgsDebugMsg( msg );
}
if ( query.isActive() )
{
if ( query.next() )
{
if ( query.value( 0 ).toInt() == query.value( 1 ).toInt() )
{
mFidColName = pk;
return;
}
}
}
}
}
}
}
QVariant QgsMssqlProvider::defaultValue( int fieldId )
{
if ( mDefaultValues.contains( fieldId ) )
return mDefaultValues[fieldId];
else
return QVariant( QString::null );
}
QString QgsMssqlProvider::storageType() const
{
return "MSSQL spatial database";
}
// Returns the minimum value of an attribute
QVariant QgsMssqlProvider::minimumValue( int index )
{
// get the field name
QgsField fld = mAttributeFields[ index ];
QString sql = QString( "select min([%1]) from " )
.arg( fld.name() );
if ( !mSchemaName.isEmpty() )
sql += "[" + mSchemaName + "].";
sql += "[" + mTableName + "]";
if ( !mSqlWhereClause.isEmpty() )
{
sql += QString( " where (%1)" ).arg( mSqlWhereClause );
}
QSqlQuery query = QSqlQuery( mDatabase );
query.setForwardOnly( true );
if ( !query.exec( sql ) )
{
QString msg = query.lastError().text();
QgsDebugMsg( msg );
}
if ( query.isActive() )
{
if ( query.next() )
return query.value( 0 );
}
return QVariant( QString::null );
}
// Returns the maximum value of an attribute
QVariant QgsMssqlProvider::maximumValue( int index )
{
// get the field name
QgsField fld = mAttributeFields[ index ];
QString sql = QString( "select max([%1]) from " )
.arg( fld.name() );
if ( !mSchemaName.isEmpty() )
sql += "[" + mSchemaName + "].";
sql += "[" + mTableName + "]";
if ( !mSqlWhereClause.isEmpty() )
{
sql += QString( " where (%1)" ).arg( mSqlWhereClause );
}
QSqlQuery query = QSqlQuery( mDatabase );
query.setForwardOnly( true );
if ( !query.exec( sql ) )
{
QString msg = query.lastError().text();
QgsDebugMsg( msg );
}
if ( query.isActive() )
{
if ( query.next() )
return query.value( 0 );
}
return QVariant( QString::null );
}
// Returns the list of unique values of an attribute
void QgsMssqlProvider::uniqueValues( int index, QList<QVariant> &uniqueValues, int limit )
{
uniqueValues.clear();
// get the field name
QgsField fld = mAttributeFields[ index ];
QString sql = QString( "select distinct " );
if ( limit > 0 )
{
sql += QString( " top %1 " ).arg( limit );
}
sql += QString( "[%1] from " )
.arg( fld.name() );
if ( !mSchemaName.isEmpty() )
sql += "[" + mSchemaName + "].";
sql += "[" + mTableName + "]";
if ( !mSqlWhereClause.isEmpty() )
{
sql += QString( " where (%1)" ).arg( mSqlWhereClause );
}
QSqlQuery query = QSqlQuery( mDatabase );
query.setForwardOnly( true );
if ( !query.exec( sql ) )
{
QString msg = query.lastError().text();
QgsDebugMsg( msg );
}
if ( query.isActive() )
{
// read all features
while ( query.next() )
{
uniqueValues.append( query.value( 0 ) );
}
}
}
// update the extent, feature count, wkb type and srid for this layer
void QgsMssqlProvider::UpdateStatistics( bool estimate )
{
mNumberFeatures = 0;
// get features to calculate the statistics
QString statement;
bool readAll = false;
if ( estimate )
{
if ( mGeometryColType == "geometry" )
statement = QString( "select min([%1].STPointN(1).STX), min([%1].STPointN(1).STY), max([%1].STPointN(1).STX), max([%1].STPointN(1).STY), COUNT([%1])" ).arg( mGeometryColName );
else
statement = QString( "select min([%1].STPointN(1).Long), min([%1].STPointN(1).Lat), max([%1].STPointN(1).Long), max([%1].STPointN(1).Lat), COUNT([%1])" ).arg( mGeometryColName );
}
else
{
if ( mGeometryColType == "geometry" )
statement = QString( "select min([%1].STEnvelope().STPointN(1).STX), min([%1].STEnvelope().STPointN(1).STY), max([%1].STEnvelope().STPointN(3).STX), max([%1].STEnvelope().STPointN(3).STY), count([%1])" ).arg( mGeometryColName );
else
{
statement = QString( "select [%1]" ).arg( mGeometryColName );
readAll = true;
}
}
if ( mSchemaName.isEmpty() )
statement += QString( " from [%1]" ).arg( mTableName );
else
statement += QString( " from [%1].[%2]" ).arg( mSchemaName, mTableName );
if ( !mSqlWhereClause.isEmpty() )
{
statement += " where (" + mSqlWhereClause + ")";
}
QSqlQuery query = QSqlQuery( mDatabase );
query.setForwardOnly( true );
if ( !query.exec( statement ) )
{
QString msg = query.lastError().text();
QgsDebugMsg( msg );
}
if ( query.isActive() )
{
QgsGeometry geom;
if ( !readAll )
{
if ( query.next() )
{
mExtent.setXMinimum( query.value( 0 ).toDouble() );
mExtent.setYMinimum( query.value( 1 ).toDouble() );
mExtent.setXMaximum( query.value( 2 ).toDouble() );
mExtent.setYMaximum( query.value( 3 ).toDouble() );
mNumberFeatures = query.value( 4 ).toInt();
}
}
else
{
// read all features
while ( query.next() )
{
QByteArray ar = query.value( 0 ).toByteArray();
unsigned char* wkb = parser.ParseSqlGeometry(( unsigned char* )ar.data(), ar.size() );
if ( wkb )
{
geom.fromWkb( wkb, parser.GetWkbLen() );
QgsRectangle rect = geom.boundingBox();
if ( mNumberFeatures > 0 )
{
if ( rect.xMinimum() < mExtent.xMinimum() )
mExtent.setXMinimum( rect.xMinimum() );
if ( rect.yMinimum() < mExtent.yMinimum() )
mExtent.setYMinimum( rect.yMinimum() );
if ( rect.xMaximum() > mExtent.xMaximum() )
mExtent.setXMaximum( rect.xMaximum() );
if ( rect.yMaximum() > mExtent.yMaximum() )
mExtent.setYMaximum( rect.yMaximum() );
}
else
{
mExtent = rect;
mWkbType = geom.wkbType();
mSRId = parser.GetSRSId();
}
++mNumberFeatures;
}
}
}
}
}
// Return the extent of the layer
QgsRectangle QgsMssqlProvider::extent()
{
if ( mExtent.isEmpty() )
UpdateStatistics( mUseEstimatedMetadata );
return mExtent;
}
/**
* Return the feature type
*/
QGis::WkbType QgsMssqlProvider::geometryType() const
{
return mWkbType;
}
/**
* Return the feature type
*/
long QgsMssqlProvider::featureCount() const
{
return mNumberFeatures;
}
const QgsFields & QgsMssqlProvider::fields() const
{
return mAttributeFields;
}
bool QgsMssqlProvider::isValid()
{
return mValid;
}
bool QgsMssqlProvider::addFeatures( QgsFeatureList & flist )
{
for ( QgsFeatureList::iterator it = flist.begin(); it != flist.end(); ++it )
{
QString statement;
QString values;
if ( mSchemaName.isEmpty() )
statement = QString( "INSERT INTO [%1].[%2] (" ).arg( QString( "dbo" ), mTableName );
else
statement = QString( "INSERT INTO [%1].[%2] (" ).arg( mSchemaName, mTableName );
bool first = true;
QSqlQuery query = QSqlQuery( mDatabase );
query.setForwardOnly( true );
const QgsAttributes& attrs = it->attributes();
for ( int i = 0; i < attrs.count(); ++i )
{
QgsField fld = mAttributeFields[i];
if ( fld.typeName().endsWith( " identity", Qt::CaseInsensitive ) )
continue; // skip identity field
if ( fld.name().isEmpty() )
continue; // invalid
if ( mDefaultValues.contains( i ) && mDefaultValues[i] == attrs[i] )
continue; // skip fields having default values
if ( !first )
{
statement += ",";
values += ",";
}
else
first = false;
statement += QString( "[%1]" ).arg( fld.name() );
values += QString( "?" );
}
// append geometry column name
if ( !mGeometryColName.isEmpty() )
{
if ( !first )
{
statement += ",";
values += ",";
}
statement += QString( "[%1]" ).arg( mGeometryColName );
if ( mGeometryColType == "geometry" )
{
if ( mUseWkb )
values += QString( "geometry::STGeomFromWKB(%1,%2).MakeValid()" ).arg(
QString( "?" ) , QString::number( mSRId ) );
else
values += QString( "geometry::STGeomFromText(%1,%2).MakeValid()" ).arg(
QString( "?" ) , QString::number( mSRId ) );
}
else
{
if ( mUseWkb )
values += QString( "geography::STGeomFromWKB(%1,%2)" ).arg(
QString( "?" ), QString::number( mSRId ) );
else
values += QString( "geography::STGeomFromText(%1,%2)" ).arg(
QString( "?" ), QString::number( mSRId ) );
}
}
statement += ") VALUES (" + values + ")";
// use prepared statement to prevent from sql injection
if ( !query.prepare( statement ) )
{
QString msg = query.lastError().text();
QgsDebugMsg( msg );
if ( !mSkipFailures )
{
QString msg = query.lastError().text();
QgsDebugMsg( msg );
pushError( msg );
return false;
}
else
continue;
}
for ( int i = 0; i < attrs.count(); ++i )
{
QgsField fld = mAttributeFields[i];
if ( fld.typeName().endsWith( " identity", Qt::CaseInsensitive ) )
continue; // skip identity field
if ( fld.name().isEmpty() )
continue; // invalid
if ( mDefaultValues.contains( i ) && mDefaultValues[i] == attrs[i] )
continue; // skip fields having default values
QVariant::Type type = fld.type();
if ( attrs[i].isNull() || !attrs[i].isValid() )
{
// binding null values
if ( type == QVariant::Date || type == QVariant::DateTime )
query.addBindValue( QVariant( QVariant::String ) );
else
query.addBindValue( QVariant( type ) );
}
else if ( type == QVariant::Int )
{
// binding an INTEGER value
query.addBindValue( attrs[i].toInt() );
}
else if ( type == QVariant::Double )
{
// binding a DOUBLE value
query.addBindValue( attrs[i].toDouble() );
}
else if ( type == QVariant::String )
{
// binding a TEXT value
query.addBindValue( attrs[i].toString() );
}
else
{
query.addBindValue( attrs[i] );
}
}
if ( !mGeometryColName.isEmpty() )
{
QgsGeometry *geom = it->geometry();
if ( mUseWkb )
{
QByteArray bytea = QByteArray(( char* )geom->asWkb(), geom->wkbSize() );
query.addBindValue( bytea, QSql::In | QSql::Binary );
}
else
{
QString wkt = geom->exportToWkt();
query.addBindValue( wkt );
}
}
if ( !query.exec() )
{
QString msg = query.lastError().text();
QgsDebugMsg( msg );
if ( !mSkipFailures )
{
pushError( msg );
return false;
}
}
if ( mSchemaName.isEmpty() )
statement = QString( "SELECT IDENT_CURRENT('dbo.%1')" ).arg( mTableName );
else
statement = QString( "SELECT IDENT_CURRENT('%1.%2')" ).arg( mSchemaName, mTableName );
if ( !query.exec( statement ) )
{
QString msg = query.lastError().text();
QgsDebugMsg( msg );
if ( !mSkipFailures )
{
pushError( msg );
return false;
}
}
query.next();
it->setFeatureId( query.value( 0 ).toLongLong() );
}
return true;
}
bool QgsMssqlProvider::addAttributes( const QList<QgsField> &attributes )
{
QString statement;
for ( QList<QgsField>::const_iterator it = attributes.begin(); it != attributes.end(); ++it )
{
QString type = it->typeName();
if ( type == "char" || type == "varchar" )
{
if ( it->length() > 0 )
type = QString( "%1(%2)" ).arg( type ).arg( it->length() );
}
else if ( type == "numeric" || type == "decimal" )
{
if ( it->length() > 0 && it->precision() > 0 )
type = QString( "%1(%2,%3)" ).arg( type ).arg( it->length() ).arg( it->precision() );
}
if ( statement.isEmpty() )
{
if ( mSchemaName.isEmpty() )
statement = QString( "ALTER TABLE [%1].[%2] ADD " ).arg(
QString( "dbo" ), mTableName );
else
statement = QString( "ALTER TABLE [%1].[%2] ADD " ).arg(
mSchemaName, mTableName );
}
else
statement += ",";
statement += QString( "[%1] %2" ).arg( it->name(), type );
}
QSqlQuery query = QSqlQuery( mDatabase );
query.setForwardOnly( true );
if ( !query.exec( statement ) )
{
QString msg = query.lastError().text();
QgsDebugMsg( msg );
return false;
}
return true;
}
bool QgsMssqlProvider::deleteAttributes( const QgsAttributeIds &attributes )
{
QString statement;
for ( QgsAttributeIds::const_iterator it = attributes.begin(); it != attributes.end(); ++it )
{
if ( statement.isEmpty() )
{
if ( mSchemaName.isEmpty() )
statement = QString( "ALTER TABLE [%1].[%2] DROP COLUMN " ).arg( QString( "dbo" ), mTableName );
else
statement = QString( "ALTER TABLE [%1].[%2] DROP COLUMN " ).arg( mSchemaName, mTableName );
}
else
statement += ",";
statement += QString( "[%1]" ).arg( mAttributeFields[*it].name() );
}
QSqlQuery query = QSqlQuery( mDatabase );
query.setForwardOnly( true );
if ( !query.exec( statement ) )
{
QString msg = query.lastError().text();
QgsDebugMsg( msg );
return false;
}
query.finish();
loadFields();
return true;
}
bool QgsMssqlProvider::changeAttributeValues( const QgsChangedAttributesMap & attr_map )
{
if ( attr_map.isEmpty() )
return true;
if ( mFidColName.isEmpty() )
return false;
for ( QgsChangedAttributesMap::const_iterator it = attr_map.begin(); it != attr_map.end(); ++it )
{
QgsFeatureId fid = it.key();
// skip added features
if ( FID_IS_NEW( fid ) )
continue;
QString statement;
if ( mSchemaName.isEmpty() )
statement = QString( "UPDATE [%1].[%2] SET " ).arg( QString( "dbo" ), mTableName );
else
statement = QString( "UPDATE [%1].[%2] SET " ).arg( mSchemaName, mTableName );
bool first = true;
QSqlQuery query = QSqlQuery( mDatabase );
query.setForwardOnly( true );
const QgsAttributeMap& attrs = it.value();
for ( QgsAttributeMap::const_iterator it2 = attrs.begin(); it2 != attrs.end(); ++it2 )
{
QgsField fld = mAttributeFields[it2.key()];
if ( fld.typeName().endsWith( " identity", Qt::CaseInsensitive ) )
continue; // skip identity field
if ( fld.name().isEmpty() )
continue; // invalid
if ( !first )