[processing] Add option for converting field names to lowercase for I…

…mport to PostGIS algorithm

python/plugins/processing/admintools/ImportIntoPostGIS.py

@@ -50,6 +50,7 @@ class ImportIntoPostGIS(GeoAlgorithm):
     OVERWRITE = 'OVERWRITE'
     CREATEINDEX = 'CREATEINDEX'
     GEOMETRY_COLUMN = 'GEOMETRY_COLUMN'
+    LOWERCASE_NAMES = 'LOWERCASE_NAMES'
 
     def getIcon(self):
         return QIcon(os.path.dirname(__file__) + '/../images/postgis.png')
@@ -59,6 +60,7 @@ def processAlgorithm(self, progress):
         schema = self.getParameterValue(self.SCHEMA)
         overwrite = self.getParameterValue(self.OVERWRITE)
         createIndex = self.getParameterValue(self.CREATEINDEX)
+        convertLowerCase = self.getParameterValue(self.LOWERCASE_NAMES)
         settings = QSettings()
         mySettings = '/PostgreSQL/connections/' + connection
         try:
@@ -93,7 +95,8 @@ def processAlgorithm(self, progress):
         options = {}
         if overwrite:
             options['overwrite'] = True
-
+        if convertLowerCase:
+            options['lowercaseFieldNames'] = True
         layerUri = self.getParameterValue(self.INPUT)
         layer = dataobjects.getObjectFromUri(layerUri)
         (ret, errMsg) = QgsVectorLayerImport.importLayer(
@@ -136,3 +139,5 @@ def defineCharacteristics(self):
         self.addParameter(ParameterBoolean(self.OVERWRITE, 'Overwrite', True))
         self.addParameter(ParameterBoolean(self.CREATEINDEX,
                           'Create spatial index', True))
+        self.addParameter(ParameterBoolean(self.LOWERCASE_NAMES,
+                          'Convert field names to lowercase', False))

src/providers/postgres/qgspostgresprovider.cpp

@@ -2844,8 +2844,6 @@ QgsVectorLayerImport::ImportError QgsPostgresProvider::createEmptyLayer(
   QString *errorMessage,
   const QMap<QString, QVariant> *options )
 {
-  Q_UNUSED( options );
-
   // populate members from the uri structure
   QgsDataSourceURI dsUri( uri );
   QString schemaName = dsUri.schema();
@@ -3048,6 +3046,12 @@ QgsVectorLayerImport::ImportError QgsPostgresProvider::createEmptyLayer(
         continue;
       }
 
+      if ( options->contains( "lowercaseFieldNames" ) && options->value( "lowercaseFieldNames" ).toBool() )
+      {
+        //convert field name to lowercase
+        fld.setName( fld.name().toLower() );
+      }
+
       if ( !convertField( fld ) )
       {
         if ( errorMessage )