Revert oracle server-side simplication

(reverts 6f70953 and 772dc1d)

Author: jef-n

src/providers/oracle/qgsoracleconn.cpp

@@ -59,7 +59,6 @@ QgsOracleConn::QgsOracleConn( QgsDataSourceURI uri )
     : mRef( 1 )
     , mCurrentUser( QString::null )
     , mHasSpatial( -1 )
-    , mMajorVersion( -1 )
 {
   QgsDebugMsg( QString( "New Oracle connection for " ) + uri.connectionInfo() );
 
@@ -774,21 +773,6 @@ QString QgsOracleConn::databaseName( QString database, QString host, QString por
   return db;
 }
 
-int QgsOracleConn::majorVersion()
-{
-  if ( mMajorVersion == -1 )
-  {
-    QSqlQuery qry( mDatabase );
-    if ( exec( qry, "SELECT banner FROM v$version WHERE banner LIKE 'Oracle Database%'" ) && qry.next() )
-    {
-      QRegExp vers( "([0-9]+)\\.[0-9\\.]+[0-9]" );
-      if ( vers.indexIn( qry.value( 0 ).toString() ) >= 0 )
-        mMajorVersion = vers.cap( 1 ).toInt();
-    }
-  }
-  return mMajorVersion;
-}
-
 bool QgsOracleConn::hasSpatial()
 {
   if ( mHasSpatial == -1 )

src/providers/oracle/qgsoracleconn.h

@@ -139,7 +139,6 @@ class QgsOracleConn : public QObject
     QString currentUser();
 
     bool hasSpatial();
-    int majorVersion();
 
     static const int sGeomTypeSelectLimit;
 
@@ -178,9 +177,6 @@ class QgsOracleConn : public QObject
     //! has spatial
     int mHasSpatial;
 
-    //! major database version
-    int mMajorVersion;
-
     QSqlDatabase mDatabase;
     QSqlQuery mQuery;
 

src/providers/oracle/qgsoraclefeatureiterator.cpp

@@ -148,27 +148,6 @@ bool QgsOracleFeatureIterator::nextFeatureFilterExpression( QgsFeature& f )
     return fetchFeature( f );
 }
 
-bool QgsOracleFeatureIterator::prepareSimplification( const QgsSimplifyMethod& simplifyMethod )
-{
-  // setup simplification of geometries to fetch
-  if ( !( mRequest.flags() & QgsFeatureRequest::NoGeometry ) &&
-       simplifyMethod.methodType() != QgsSimplifyMethod::NoSimplification &&
-       !simplifyMethod.forceLocalOptimization() )
-  {
-    QgsSimplifyMethod::MethodType methodType = simplifyMethod.methodType();
-
-    if ( methodType == QgsSimplifyMethod::OptimizeForRendering )
-    {
-      return true;
-    }
-    else
-    {
-      QgsDebugMsg( QString( "Simplification method type (%1) is not recognised by OracleFeatureIterator" ).arg( methodType ) );
-    }
-  }
-  return QgsAbstractFeatureIterator::prepareSimplification( simplifyMethod );
-}
-
 bool QgsOracleFeatureIterator::fetchFeature( QgsFeature& feature )
 {
   feature.setValid( false );
@@ -337,20 +316,7 @@ bool QgsOracleFeatureIterator::openQuery( QString whereClause )
 
     if (( mRequest.flags() & QgsFeatureRequest::NoGeometry ) == 0 && !mSource->mGeometryColumn.isNull() )
     {
-      if ( !mRequest.simplifyMethod().forceLocalOptimization() &&
-           mRequest.simplifyMethod().methodType() == QgsSimplifyMethod::OptimizeForRendering &&
-           QGis::flatType( QGis::singleType( mSource->mRequestedGeomType != QGis::WKBUnknown
-                                             ? mSource->mRequestedGeomType
-                                             : mSource->mDetectedGeomType ) ) != QGis::WKBPoint )
-      {
-        query += QString( "SDO_UTIL.SIMPLIFY( %1, %2 )" )
-                 .arg( QgsOracleProvider::quotedIdentifier( mSource->mGeometryColumn ) )
-                 .arg( mRequest.simplifyMethod().tolerance() * 0.7 ); //-> We use a smaller tolerance than pre-filtering to be on the safe side
-      }
-      else
-      {
-        query += QgsOracleProvider::quotedIdentifier( mSource->mGeometryColumn );
-      }
+      query += QgsOracleProvider::quotedIdentifier( mSource->mGeometryColumn );
       delim = ",";
     }
 
@@ -411,11 +377,6 @@ bool QgsOracleFeatureIterator::openQuery( QString whereClause )
   return true;
 }
 
-bool QgsOracleFeatureIterator::providerCanSimplify( QgsSimplifyMethod::MethodType methodType ) const
-{
-  return ( mConnection->majorVersion() > 10 || mConnection->hasSpatial() ) && methodType == QgsSimplifyMethod::OptimizeForRendering;
-}
-
 // -----------
 
 QgsOracleFeatureSource::QgsOracleFeatureSource( const QgsOracleProvider* p )

src/providers/oracle/qgsoraclefeatureiterator.h

@@ -76,20 +76,13 @@ class QgsOracleFeatureIterator : public QgsAbstractFeatureIteratorFromSource<Qgs
     //! fetch next feature filter expression
     bool nextFeatureFilterExpression( QgsFeature& f ) override;
 
-    //! Setup the simplification of geometries to fetch using the specified simplify method
-    virtual bool prepareSimplification( const QgsSimplifyMethod& simplifyMethod ) override;
-
     bool openQuery( QString whereClause );
 
     QgsOracleConn *mConnection;
     QSqlQuery mQry;
     bool mRewind;
     bool mExpressionCompiled;
     QgsAttributeList mAttributeList;
-
-  private:
-    //! returns whether the iterator supports simplify geometries on provider side
-    virtual bool providerCanSimplify( QgsSimplifyMethod::MethodType methodType ) const override;
 };
 
 #endif // QGSORACLEFEATUREITERATOR_H

src/providers/oracle/qgsoracleprovider.cpp

@@ -747,13 +747,6 @@ bool QgsOracleProvider::hasSufficientPermsAndCapabilities()
 
   mEnabledCapabilities = QgsVectorDataProvider::SelectAtId | QgsVectorDataProvider::SelectGeometryAtId;
 
-  if ( mConnection->majorVersion() > 10 || mConnection->hasSpatial() )
-  {
-    // 10g doesn't support SDO_UTIL in Oracle Locator
-    // supports geometry simplification on provider side
-    mEnabledCapabilities |= QgsVectorDataProvider::SimplifyGeometries;
-  }
-
   QSqlQuery qry( *mConnection );
   if ( !mIsQuery )
   {