[open-ils-commits] r14504 - trunk/Open-ILS/src/sql/Pg (scottmk)

[svn at svn.open-ils.org]

Author: scottmk
Date: 2009-10-20 11:03:33 -0400 (Tue, 20 Oct 2009)
New Revision: 14504

Modified:
   trunk/Open-ILS/src/sql/Pg/040.schema.asset.sql
Log:
Add new status_changed_time to CREATE statement for asset.copy,
plus a trigger to maintain it.

Corresponding ALTER already committed in an upgrade script.



Modified: trunk/Open-ILS/src/sql/Pg/040.schema.asset.sql
===================================================================
--- trunk/Open-ILS/src/sql/Pg/040.schema.asset.sql	2009-10-20 04:10:58 UTC (rev 14503)
+++ trunk/Open-ILS/src/sql/Pg/040.schema.asset.sql	2009-10-20 15:03:33 UTC (rev 14504)
@@ -60,7 +60,8 @@
 	alert_message	TEXT,
 	opac_visible	BOOL				NOT NULL DEFAULT TRUE,
 	deleted		BOOL				NOT NULL DEFAULT FALSE,
-	dummy_isbn      TEXT
+	dummy_isbn      TEXT,
+	status_changed_time TIMESTAMP WITH TIME ZONE
 );
 CREATE UNIQUE INDEX copy_barcode_key ON asset.copy (barcode) WHERE deleted IS FALSE;
 CREATE INDEX cp_cn_idx ON asset.copy (call_number);
@@ -69,6 +70,20 @@
 CREATE INDEX cp_editor_idx   ON asset.copy ( editor );
 CREATE RULE protect_copy_delete AS ON DELETE TO asset.copy DO INSTEAD UPDATE asset.copy SET deleted = TRUE WHERE OLD.id = asset.copy.id;
 
+CREATE OR REPLACE FUNCTION asset.acp_status_changed()
+RETURNS TRIGGER AS $$
+BEGIN
+    IF NEW.status <> OLD.status THEN
+        NEW.status_changed_time := now();
+    END IF;
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE TRIGGER acp_status_changed_trig
+    BEFORE UPDATE ON asset.copy
+    FOR EACH ROW EXECUTE PROCEDURE asset.acp_status_changed();
+
 CREATE TABLE asset.copy_transparency (
 	id		SERIAL		PRIMARY KEY,
 	deposit_amount	NUMERIC(6,2),