first version of trigger files

Timestamp_update_trigger_v1.0.sql

@@ -0,0 +1,31 @@
+CREATE OR REPLACE FUNCTION timestamp_update() 
+RETURNS trigger AS
+$$
+declare
+v_upd_string text;
+v_sqlstate text;
+v_message text;
+v_context text;
+
+BEGIN
+	v_upd_string := 'UPDATE ' || TG_TABLE_SCHEMA || '.' || TG_TABLE_NAME;
+	
+	IF (TG_OP = 'INSERT') THEN
+		v_upd_string := v_upd_string || ' SET create_timestamp = ''' || now() || ''', ';
+		v_upd_string := v_upd_string || ' update_timestamp = ''' || now() || ''' where syspk = ' || new.syspk;
+	ELSEIF (TG_OP = 'UPDATE') THEN
+		v_upd_string := v_upd_string || ' SET update_timestamp = ''' || now() || ''' where syspk = ' || old.syspk;
+	END IF;
+	
+	execute (v_upd_string);
+	
+	RETURN new;
+	
+	EXCEPTION WHEN OTHERS THEN
+		GET STACKED DIAGNOSTICS
+		v_sqlstate = returned_sqlstate,
+		v_message = message_text,
+		v_context = pg_exception_context;
+		RETURN NULL;
+END
+$$  LANGUAGE plpgsql;