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.

git-svn-id: svn://svn.open-ils.org/ILS/trunk@14504 dcc99617-32d9-48b4-a31d-7c20da2025e4

diff --git a/Open-ILS/src/sql/Pg/040.schema.asset.sql b/Open-ILS/src/sql/Pg/040.schema.asset.sql
index 5baaa1d..1f25cfe 100644 (file)
--- a/Open-ILS/src/sql/Pg/040.schema.asset.sql
+++ b/Open-ILS/src/sql/Pg/040.schema.asset.sql
@@ -60,7 +60,8 @@ CREATE TABLE asset.copy (
        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_creator_idx  ON asset.copy ( creator );
 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),