[oracle] Fix handling of date/time types

Also add test for Oracle default values

On behalf of Faunalia, sponsored by ENEL

src/providers/oracle/qgsoracleprovider.cpp

@@ -159,6 +159,10 @@ QgsOracleProvider::QgsOracleProvider( QString const & uri )
   << QgsVectorDataProvider::NativeType( tr( "Text, fixed length (char)" ), "CHAR", QVariant::String, 1, 255 )
   << QgsVectorDataProvider::NativeType( tr( "Text, limited variable length (varchar2)" ), "VARCHAR2", QVariant::String, 1, 255 )
   << QgsVectorDataProvider::NativeType( tr( "Text, unlimited length (long)" ), "LONG", QVariant::String )
+
+  // date type
+  << QgsVectorDataProvider::NativeType( tr( "Date" ), "DATE", QVariant::Date, 38, 38, 0, 0 )
+  << QgsVectorDataProvider::NativeType( tr( "Date & Time" ), "TIMESTAMP(6)", QVariant::DateTime, 38, 38, 6, 6 )
   ;
 
   QString key;
@@ -741,7 +745,15 @@ bool QgsOracleProvider::loadFields()
     if ( !mIsQuery && !types.contains( field.name() ) )
       continue;
 
-    mAttributeFields.append( QgsField( field.name(), field.type(), types.value( field.name() ), field.length(), field.precision(), comments.value( field.name() ) ) );
+    QVariant::Type type = field.type();
+
+    if ( types.value( field.name() ) == "DATE" )
+    {
+      // date types are incorrectly detected as datetime
+      type = QVariant::Date;
+    }
+
+    mAttributeFields.append( QgsField( field.name(), type, types.value( field.name() ), field.length(), field.precision(), comments.value( field.name() ) ) );
     mDefaultValues.append( defvalues.value( field.name(), QVariant() ) );
   }
 
@@ -2522,6 +2534,11 @@ bool QgsOracleProvider::convertField( QgsField &field )
       break;
 
     case QVariant::DateTime:
+      fieldType = "TIMESTAMP";
+      fieldPrec = -1;
+      break;
+
+
     case QVariant::Time:
     case QVariant::String:
       fieldType = "VARCHAR2(2047)";

tests/src/python/test_provider_oracle.py

@@ -16,7 +16,7 @@ import qgis  # NOQA
 
 import os
 
-from qgis.core import QgsVectorLayer, QgsFeatureRequest
+from qgis.core import QgsVectorLayer, QgsFeatureRequest, NULL
 
 from qgis.PyQt.QtCore import QSettings, QDate, QTime, QDateTime, QVariant
 
@@ -77,5 +77,31 @@ class TestPyQgsOracleProvider(unittest.TestCase, ProviderTestCase):
             'intersects($geometry,geom_from_wkt( \'Polygon ((-72.2 66.1, -65.2 66.1, -65.2 72.0, -72.2 72.0, -72.2 66.1))\'))'])
         return filters
 
+    # HERE GO THE PROVIDER SPECIFIC TESTS
+    def testDateTimeTypes(self):
+        vl = QgsVectorLayer('%s table="QGIS"."DATE_TIMES" sql=' %
+                            (self.dbconn), "testdatetimes", "oracle")
+        self.assertTrue(vl.isValid())
+
+        fields = vl.dataProvider().fields()
+        self.assertEqual(fields.at(fields.indexFromName(
+            'date_field')).type(), QVariant.Date)
+        self.assertEqual(fields.at(fields.indexFromName(
+            'datetime_field')).type(), QVariant.DateTime)
+
+        f = next(vl.getFeatures(QgsFeatureRequest()))
+
+        date_idx = vl.fieldNameIndex('date_field')
+        self.assertTrue(isinstance(f.attributes()[date_idx], QDate))
+        self.assertEqual(f.attributes()[date_idx], QDate(2004, 3, 4))
+        datetime_idx = vl.fieldNameIndex('datetime_field')
+        self.assertTrue(isinstance(f.attributes()[datetime_idx], QDateTime))
+        self.assertEqual(f.attributes()[datetime_idx], QDateTime(
+            QDate(2004, 3, 4), QTime(13, 41, 52)))
+
+    def testDefaultValue(self):
+        self.assertEqual(self.provider.defaultValue(1), NULL)
+        self.assertEqual(self.provider.defaultValue(2), "'qgis'")
+
 if __name__ == '__main__':
     unittest.main()

tests/testdata/provider/testdata_oracle.sql

@@ -24,3 +24,9 @@ INSERT INTO user_sdo_geom_metadata (TABLE_NAME, COLUMN_NAME, DIMINFO, SRID) VALU
 
 CREATE INDEX some_poly_data_spatial_idx ON QGIS.SOME_POLY_DATA(GEOM) INDEXTYPE IS MDSYS.SPATIAL_INDEX;
 
+
+CREATE TABLE QGIS.DATE_TIMES ( "id" INTEGER PRIMARY KEY, "date_field" DATE, "datetime_field" TIMESTAMP );
+
+INSERT INTO QGIS.DATE_TIMES ("id", "date_field", "datetime_field" ) VALUES (1, DATE '2004-03-04', TIMESTAMP '2004-03-04 13:41:52' );
+
+COMMIT;