adding cleanup trigger and cascading delete

git-svn-id: svn://svn.open-ils.org/ILS/branches/acq-experiment@8376 dcc99617-32d9-48b4-a31d-7c20da2025e4

diff --git a/Open-ILS/src/sql/Pg/200.schema.acq.sql b/Open-ILS/src/sql/Pg/200.schema.acq.sql
index bdae085..c8ef47d 100644 (file)
--- a/Open-ILS/src/sql/Pg/200.schema.acq.sql
+++ b/Open-ILS/src/sql/Pg/200.schema.acq.sql
@@ -82,7 +82,7 @@ CREATE TABLE acq.picklist (
 
 CREATE TABLE acq.picklist_entry (
        id              BIGSERIAL                       PRIMARY KEY,
-       picklist        INT                             NOT NULL REFERENCES acq.picklist (id),
+       picklist        INT                             NOT NULL REFERENCES acq.picklist (id) ON DELETE CASCADE,
        provider        INT                             REFERENCES acq.provider (id),
        create_time     TIMESTAMP WITH TIME ZONE        NOT NULL DEFAULT NOW(),
        edit_time       TIMESTAMP WITH TIME ZONE        NOT NULL DEFAULT NOW(),
@@ -93,7 +93,7 @@ CREATE TABLE acq.picklist_entry (
 
 CREATE TABLE acq.picklist_entry_attr (
        id              BIGSERIAL       PRIMARY KEY,
-       picklist_entry  BIGINT          NOT NULL REFERENCES acq.picklist_entry (id),
+       picklist_entry  BIGINT          NOT NULL REFERENCES acq.picklist_entry (id) ON DELETE CASCADE,
        attr_type       TEXT            NOT NULL,
        attr_name       TEXT            NOT NULL,
        attr_value      TEXT            NOT NULL
@@ -146,7 +146,7 @@ INSERT INTO acq.picklist_marc_attr_definition ( code, description, xpath ) VALUE
 INSERT INTO acq.picklist_marc_attr_definition ( code, description, xpath ) VALUES ('pagination','Pagination','//*[@tag="300"]/*[@code="a"][1]');
 INSERT INTO acq.picklist_marc_attr_definition ( code, description, xpath ) VALUES ('isbn','ISBN','//*[@tag="020"]/*[@code="a"]');
 INSERT INTO acq.picklist_marc_attr_definition ( code, description, xpath ) VALUES ('issn','ISSN','//*[@tag="022"]/*[@code="a"]');
-INSERT INTO acq.picklist_marc_attr_definition ( code, description, xpath ) VALUES ('price','Price','//*[@tag="020" or @tag="022"]/*[@code="a"][1]');
+INSERT INTO acq.picklist_marc_attr_definition ( code, description, xpath ) VALUES ('price','Price','//*[@tag="020" or @tag="022"]/*[@code="c"][1]');
 INSERT INTO acq.picklist_marc_attr_definition ( code, description, xpath ) VALUES ('identifier','Identifier','//*[@tag="001"]');
 INSERT INTO acq.picklist_marc_attr_definition ( code, description, xpath ) VALUES ('publisher','Publisher','//*[@tag="260"]/*[@code="b"][1]');
 INSERT INTO acq.picklist_marc_attr_definition ( code, description, xpath ) VALUES ('pubdate','Publication Date','//*[@tag="260"]/*[@code="c"][1]');
@@ -189,6 +189,21 @@ BEGIN
 END;
 $$ LANGUAGE PLPGSQL;
 
+CREATE OR REPLACE FUNCTION public.cleanup_acq_marc ( ) RETURNS TRIGGER AS $$
+BEGIN
+       DELETE FROM acq.picklist_entry_attr WHERE picklist_entry = OLD.id;
+       IF TG_OP = 'UPDATE' THEN
+               RETURN NEW;
+       ELSE
+               RETURN OLD;
+       END IF;
+END;
+$$ LANGUAGE PLPGSQL;
+
+CREATE TRIGGER cleanup_picklist_entry_trigger
+       BEFORE UPDATE OR DELETE ON acq.picklist_entry 
+       FOR EACH ROW EXECUTE PROCEDURE public.cleanup_acq_marc();
+
 CREATE TRIGGER ingest_picklist_entry_trigger
        AFTER INSERT OR UPDATE ON acq.picklist_entry 
        FOR EACH ROW EXECUTE PROCEDURE public.ingest_acq_marc();