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We'll need to let this settle for a version before we make it the

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primary key.  Too many programming changes are needed to accept the
risk of rolling it straight out.
This commit is contained in:
Andrew McMillan 2007-12-04 12:17:59 +13:00
parent bdb1e60cd1
commit bbca4ba75f
1 changed files with 19 additions and 9 deletions
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28
dba/patches/1.1.12.sql
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@ -1,5 +1,5 @@
-- Add a numeric primary key link between caldav_data and calendar_item to
-- Add a numeric foreign key link between caldav_data and calendar_item to
-- provide more efficient linking when the db has been initialised with a
-- non POSIX collation.
@ -15,6 +15,7 @@ ALTER TABLE collection ADD COLUMN publicly_readable BOOLEAN DEFAULT FALSE;
ALTER TABLE caldav_data ADD COLUMN dav_id INT8;
ALTER TABLE calendar_item ADD COLUMN dav_id INT8;
CREATE SEQUENCE caldav_data_dav_id_seq;
GRANT SELECT,UPDATE ON caldav_data_dav_id_seq TO general;
CREATE or REPLACE FUNCTION sync_dav_id ( ) RETURNS TRIGGER AS '
DECLARE
@ -29,9 +30,11 @@ CREATE or REPLACE FUNCTION sync_dav_id ( ) RETURNS TRIGGER AS '
NEW.dav_id = nextval(''caldav_data_dav_id_seq'');
END IF;
IF OLD.dav_id = NEW.dav_id THEN
-- Nothing to do
RETURN NEW;
IF TG_OP = ''UPDATE'' THEN
IF OLD.dav_id = NEW.dav_id THEN
-- Nothing to do
RETURN NEW;
END IF;
END IF;
IF TG_RELNAME = ''caldav_data'' THEN
@ -54,12 +57,19 @@ CREATE TRIGGER calendar_item_sync_dav_id AFTER INSERT OR UPDATE ON calendar_item
-- Now, using the trigger, magically assign dav_id to all rows in caldav_data and calendar_item
UPDATE caldav_data SET dav_id = dav_id;
ALTER TABLE caldav_data ALTER COLUMN dav_id SET DEFAULT nextval('caldav_data_dav_id_seq');
ALTER TABLE caldav_data ALTER COLUMN dav_id SET NOT NULL;
ALTER TABLE caldav_data ADD CONSTRAINT caldav_data_dav_id_key UNIQUE (dav_id);
-- ALTER TABLE calendar_item ALTER COLUMN dav_id SET NOT NULL;
ALTER TABLE calendar_item ADD CONSTRAINT calendar_item_dav_id_key UNIQUE (dav_id);
-- Finally, what we are really after, create the foreign key constraints
ALTER TABLE caldav_data DROP CONSTRAINT caldav_data_pkey CASCADE;
ALTER TABLE caldav_data ADD PRIMARY KEY ( dav_id );
ALTER TABLE calendar_item DROP CONSTRAINT calendar_item_pkey CASCADE;
ALTER TABLE calendar_item ADD PRIMARY KEY ( dav_id );
ALTER TABLE calendar_item ADD CONSTRAINT "calendar_item_dav_id_fkey" FOREIGN KEY (dav_id) REFERENCES caldav_data(dav_id) ON UPDATE CASCADE ON DELETE CASCADE DEFERRABLE;
-- ALTER TABLE caldav_data DROP CONSTRAINT caldav_data_pkey CASCADE;
-- ALTER TABLE caldav_data ADD PRIMARY KEY ( dav_id );
-- ALTER TABLE calendar_item DROP CONSTRAINT calendar_item_pkey CASCADE;
-- ALTER TABLE calendar_item ADD PRIMARY KEY ( dav_id );
-- ALTER TABLE calendar_item ADD CONSTRAINT "calendar_item_dav_id_fkey" FOREIGN KEY (dav_id) REFERENCES caldav_data(dav_id) ON UPDATE CASCADE ON DELETE CASCADE DEFERRABLE;
SELECT new_db_revision(1,1,12, 'December' );