BF [ 1824260 ] TRUNC function not working like in Oracle

db/ddlutils/postgresql/functions/trunc.sql

@@ -31,9 +31,9 @@ RETURNS DATE AS $$
 BEGIN
 	IF format = 'Q' THEN
 		RETURN CAST(DATE_Trunc('quarter',datetime) as DATE);
-	ELSIF format = 'Y' THEN
+	ELSIF format = 'Y' or format = 'YEAR' THEN
 		RETURN CAST(DATE_Trunc('year',datetime) as DATE);
-	ELSIF format = 'MM' THEN
+	ELSIF format = 'MM' or format = 'MONTH' THEN
 		RETURN CAST(DATE_Trunc('month',datetime) as DATE);
 	ELSIF format = 'DD' THEN
 		RETURN CAST(DATE_Trunc('day',datetime) as DATE);

migration/330-trunk/028_BF_1824260.sql

@@ -0,0 +1,4 @@
+-- BF [ 1824260 ] TRUNC function not working like in Oracle
+-- http://sourceforge.net/tracker/?func=detail&atid=879332&aid=1824260&group_id=176962
+--
+-- Nothing to do for Oracle, this is just a sequence placeholder

migration/330-trunk/postgresql/028_BF_1824260.sql

@@ -0,0 +1,35 @@
+-- BF [ 1824260 ] TRUNC function not working like in Oracle
+-- http://sourceforge.net/tracker/?func=detail&atid=879332&aid=1824260&group_id=176962
+--
+CREATE OR REPLACE FUNCTION trunc(datetime TIMESTAMP WITH TIME ZONE)
+RETURNS DATE AS $$
+BEGIN
+	RETURN CAST(datetime AS DATE);
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE OR REPLACE FUNCTION trunc(datetime TIMESTAMP WITH TIME ZONE, format varchar)
+RETURNS DATE AS $$
+BEGIN
+	IF format = 'Q' THEN
+		RETURN CAST(DATE_Trunc('quarter',datetime) as DATE);
+	ELSIF format = 'Y' or format = 'YEAR' THEN
+		RETURN CAST(DATE_Trunc('year',datetime) as DATE);
+	ELSIF format = 'MM' or format = 'MONTH' THEN
+		RETURN CAST(DATE_Trunc('month',datetime) as DATE);
+	ELSIF format = 'DD' THEN
+		RETURN CAST(DATE_Trunc('day',datetime) as DATE);
+	ELSIF format = 'DY' THEN
+		RETURN CAST(DATE_Trunc('day',datetime) as DATE);
+	ELSE
+		RETURN CAST(datetime AS DATE);
+	END IF;
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE OR REPLACE FUNCTION trunc(i INTERVAL)
+RETURNS INTEGER AS $$
+BEGIN
+	RETURN EXTRACT(DAY FROM i);
+END;
+$$ LANGUAGE plpgsql;