database-trigger

MySQL said: #1054 - Unknown column 'TMPCOL' in 'OLD' BEGIN DECLARE TOTAL,I INT; DECLARE CURRENT_CLOUMN VARCHAR(255); DECLARE TRIGGER_ON_TABLE VARCHAR(255); DECLARE TRIGGER_OP VARCHAR(255); DECLARE olddd VARCHAR(255); DECLARE newwww VARCHAR(255); SET TOTAL=0; SET I=0; SET CURRENT_CLOUMN='atulbaldaniya.com'; SET TRIGGER_ON_TABLE='atulbaldaniya'; SET TRIGGER_OP='UPDATE'; SET olddd=''; SET newwww=''; SELECT COUNT(COLUMN_NAME) INTO TOTAL FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = TRIGGER_ON_TABLE ORDER BY ORDINAL_POSITION; WHILE I < TOTAL DO SELECT COLUMN_NAME INTO CURRENT_CLOUMN FROM

I have a trigger function for a table test which has the following code snippet: IF TG_OP='UPDATE' THEN IF OLD.locked > 0 AND ( OLD.org_id <> NEW.org_id OR OLD.document_code <> NEW.document_code OR -- other columns ... ) THEN RAISE EXCEPTION 'Message'; -- more code So I am statically checking all the column's new value with its previous value to ensure integrity. Now every time my business logic changes and I have to add new columns into that table, I will have to modify this trigger each time. I thought it would be better if somehow I could dynamically check all the columns of that table,

I successfully used the following BEFORE INSERT trigger to limit the number of rows stored in the SQLite database table locations . The database table acts as a cache in an Android application. CREATE TRIGGER 'trigger_locations_insert' BEFORE INSERT ON 'locations' WHEN ( SELECT count(*) FROM 'locations' ) > '100' BEGIN DELETE FROM 'locations' WHERE '_id' NOT IN ( SELECT '_id' FROM 'locations' ORDER BY 'modified_at' DESC LIMIT '100' ); END Meanwhile, I added a second trigger that allows me to INSERT OR UPDATE rows. - The discussion on that topic can be found in another thread . The second

In my MySQL database I have some triggers ON DELETE and ON INSERT . Sometimes I need to disable some triggers, and I have to DROP e.g. DROP TRIGGER IF EXISTS hostgroup_before_insert // and reinstall. Is there any shortcut to SET triggers hostgroup_before_insert = 0 like we have for foreign keys: mysql> SELECT version(); +-------------------------+ | version() | +-------------------------+ | 5.1.61-0ubuntu0.10.10.1 | +-------------------------+ 1 row in set (0.00 sec) EDIT Answer There is no built-in server system variable TRIGGER_CHECKS in MySQL . A simple workaround is to instead use a user

I have a table that I keep track of fees for a specific item. These fees can change over time so I have two columns (startDate, endDate) with the current set of fees always having an endDate in the far future. I already have a trigger that I use to do some calculations on the new row being entered but what I also want to have happen is if I enter an item that already has an entry I want to set the previous entry's endDate to the day before the new entry's startDate and the new endDate to a predetermined far-away date. Here is the code for what I tried first: CREATE DEFINER=`root`@`%` TRIGGER