--- a/flys-backend/doc/schema/oracle.sql	Wed Feb 27 11:38:36 2013 +0100
+++ b/flys-backend/doc/schema/oracle.sql	Wed Feb 27 12:39:59 2013 +0100
@@ -340,38 +340,40 @@
 
 
 -- ADD CONSTRAINTs
-ALTER TABLE annotations ADD CONSTRAINT cAnnotationsRanges FOREIGN KEY (range_id) REFERENCES ranges;
+ALTER TABLE annotations ADD CONSTRAINT cAnnotationsAttributes FOREIGN KEY (attribute_id) REFERENCES attributes;
 ALTER TABLE annotations ADD CONSTRAINT cAnnotationsEdges FOREIGN KEY (edge_id) REFERENCES edges;
 ALTER TABLE annotations ADD CONSTRAINT cAnnotationsPositions FOREIGN KEY (position_id) REFERENCES positions;
-ALTER TABLE annotations ADD CONSTRAINT cAnnotationsAttributes FOREIGN KEY (attribute_id) REFERENCES attributes;
 ALTER TABLE annotations ADD CONSTRAINT cAnnotationsTypes FOREIGN KEY (type_id) REFERENCES annotation_types;
-ALTER TABLE cross_section_lines ADD CONSTRAINT cQPSLinesCrossSections FOREIGN KEY (cross_section_id) REFERENCES cross_sections;
-ALTER TABLE cross_section_points ADD CONSTRAINT cQPSPointsCrossSectionLines FOREIGN KEY (cross_section_line_id) REFERENCES cross_section_lines;
-ALTER TABLE cross_sections ADD CONSTRAINT cCrossSectionsRivers FOREIGN KEY (river_id) REFERENCES rivers;
 ALTER TABLE cross_sections ADD CONSTRAINT cCrossSectionsTimeIntervals FOREIGN KEY (time_interval_id) REFERENCES time_intervals;
-ALTER TABLE discharge_table_values ADD CONSTRAINT cTableValuesDischargeTables foreign key (table_id) REFERENCES discharge_tables;
 ALTER TABLE discharge_tables ADD CONSTRAINT cDischargeTablesTime_intervals FOREIGN KEY (time_interval_id) REFERENCES time_intervals;
-ALTER TABLE discharge_tables ADD CONSTRAINT cDischargeTablesGauges FOREIGN KEY (gauge_id) REFERENCES gauges;
-ALTER TABLE gauges ADD CONSTRAINT cGaugesRivers FOREIGN KEY (river_id) REFERENCES rivers;
-ALTER TABLE gauges ADD CONSTRAINT cGaugesRanges FOREIGN KEY (range_id) REFERENCES ranges;
-ALTER TABLE hyk_entries ADD CONSTRAINT cHykEntriesHyks FOREIGN KEY (hyk_id) REFERENCES hyks;
-ALTER TABLE hyk_flow_zones ADD CONSTRAINT cHykFlowZonesHykFormations FOREIGN KEY (formation_id) REFERENCES hyk_formations;
 ALTER TABLE hyk_flow_zones ADD CONSTRAINT cHykFlowZonesHykFlowZoneTypes FOREIGN KEY (type_id) REFERENCES hyk_flow_zone_types;
-ALTER TABLE hyks ADD CONSTRAINT cHyksRivers FOREIGN KEY (river_id) REFERENCES rivers;
-ALTER TABLE hyk_formations ADD CONSTRAINT cHykFormationsHykEntries FOREIGN KEY (hyk_entry_id) REFERENCES hyk_entries;
+ALTER TABLE main_values ADD CONSTRAINT cMainValuesNamedMainValues FOREIGN KEY (named_value_id) REFERENCES named_main_values;
 ALTER TABLE main_values ADD CONSTRAINT cMainValuesTimeIntervals FOREIGN KEY (time_interval_id) REFERENCES time_intervals;
-ALTER TABLE main_values ADD CONSTRAINT cMainValuesGauges FOREIGN KEY (gauge_id) REFERENCES gauges;
-ALTER TABLE main_values ADD CONSTRAINT cMainValuesNamedMainValues FOREIGN KEY (named_value_id) REFERENCES named_main_values;
 ALTER TABLE named_main_values ADD CONSTRAINT cNamedMainValuesMainValueTypes FOREIGN KEY (type_id) REFERENCES main_value_types;
-ALTER TABLE ranges ADD CONSTRAINT cRangesRivers FOREIGN KEY (river_id) REFERENCES rivers;
 ALTER TABLE rivers ADD CONSTRAINT cRiversUnits FOREIGN KEY (wst_unit_id) REFERENCES units;
-ALTER TABLE wst_column_q_ranges ADD CONSTRAINT cWstColumnQRangesWstColums FOREIGN KEY (wst_column_id) REFERENCES wst_columns;
-ALTER TABLE wst_column_q_ranges ADD CONSTRAINT cWstColumnQRangesWstQRanges FOREIGN KEY (wst_q_range_id) REFERENCES wst_q_ranges;
-ALTER TABLE wst_column_values ADD CONSTRAINT cWstColumnValuesWstColumns FOREIGN KEY (wst_column_id) REFERENCES wst_columns;
 ALTER TABLE wst_columns ADD CONSTRAINT cWstColumnsTime_intervals FOREIGN KEY (time_interval_id) REFERENCES time_intervals;
-ALTER TABLE wst_columns ADD CONSTRAINT cWstColumnsWsts FOREIGN KEY (wst_id) REFERENCES wsts;
-ALTER TABLE wst_q_ranges ADD CONSTRAINT cWstQRangesRanges FOREIGN KEY (range_id) REFERENCES RANGES;
-ALTER TABLE wsts ADD CONSTRAINT cWstsRivers FOREIGN KEY (river_id) REFERENCES rivers;
+
+-- Cascading references
+ALTER TABLE annotations ADD CONSTRAINT cAnnotationsRanges FOREIGN KEY (range_id) REFERENCES ranges ON DELETE CASCADE;
+ALTER TABLE cross_section_lines ADD CONSTRAINT cQPSLinesCrossSections FOREIGN KEY (cross_section_id) REFERENCES cross_sections ON DELETE CASCADE;
+ALTER TABLE cross_section_points ADD CONSTRAINT cQPSPointsCrossSectionLines FOREIGN KEY (cross_section_line_id) REFERENCES cross_section_lines ON DELETE CASCADE;
+ALTER TABLE cross_sections ADD CONSTRAINT cCrossSectionsRivers FOREIGN KEY (river_id) REFERENCES rivers ON DELETE CASCADE;
+ALTER TABLE discharge_tables ADD CONSTRAINT cDischargeTablesGauges FOREIGN KEY (gauge_id) REFERENCES gauges ON DELETE CASCADE;
+ALTER TABLE discharge_table_values ADD CONSTRAINT cTableValuesDischargeTables FOREIGN KEY (table_id) REFERENCES discharge_tables ON DELETE CASCADE;
+ALTER TABLE gauges ADD CONSTRAINT cGaugesRanges FOREIGN KEY (range_id) REFERENCES ranges ON DELETE CASCADE;
+ALTER TABLE gauges ADD CONSTRAINT cGaugesRivers FOREIGN KEY (river_id) REFERENCES rivers ON DELETE CASCADE;
+ALTER TABLE hyk_entries ADD CONSTRAINT cHykEntriesHyks FOREIGN KEY (hyk_id) REFERENCES hyks ON DELETE CASCADE;
+ALTER TABLE hyk_flow_zones ADD CONSTRAINT cHykFlowZonesHykFormations FOREIGN KEY (formation_id) REFERENCES hyk_formations ON DELETE CASCADE;
+ALTER TABLE hyk_formations ADD CONSTRAINT cHykFormationsHykEntries FOREIGN KEY (hyk_entry_id) REFERENCES hyk_entries ON DELETE CASCADE;
+ALTER TABLE hyks ADD CONSTRAINT cHyksRivers FOREIGN KEY (river_id) REFERENCES rivers ON DELETE CASCADE;
+ALTER TABLE main_values ADD CONSTRAINT cMainValuesGauges FOREIGN KEY (gauge_id) REFERENCES gauges ON DELETE CASCADE;
+ALTER TABLE ranges ADD CONSTRAINT cRangesRivers FOREIGN KEY (river_id) REFERENCES rivers ON DELETE CASCADE;
+ALTER TABLE wst_column_q_ranges ADD CONSTRAINT cWstColumnQRangesWstColums FOREIGN KEY (wst_column_id) REFERENCES wst_columns ON DELETE CASCADE;
+ALTER TABLE wst_column_q_ranges ADD CONSTRAINT cWstColumnQRangesWstQRanges FOREIGN KEY (wst_q_range_id) REFERENCES wst_q_ranges ON DELETE CASCADE;
+ALTER TABLE wst_columns ADD CONSTRAINT cWstColumnsWsts FOREIGN KEY (wst_id) REFERENCES wsts ON DELETE CASCADE;
+ALTER TABLE wst_column_values ADD CONSTRAINT cWstColumnValuesWstColumns FOREIGN KEY (wst_column_id) REFERENCES wst_columns ON DELETE CASCADE;
+ALTER TABLE wst_q_ranges ADD CONSTRAINT cWstQRangesRanges FOREIGN KEY (range_id) REFERENCES RANGES ON DELETE CASCADE;
+ALTER TABLE wsts ADD CONSTRAINT cWstsRivers FOREIGN KEY (river_id) REFERENCES rivers ON DELETE CASCADE;
 
 -- VIEWS