triggers

问题 I'm setting up a view (foo), in place of a table with the same name. The new view will use 3 sub-tables (A, B, C) instead of the original table. I'm using instead-of triggers to accomplish this. CREATE VIEW [dbo].[foo] AS select b2 as oldkey, b3 as boat, c2 as state, a2 as name from A join B on a1 = b1 join C on a1 = c1 foo columns : oldkey (identity) | boat | state | name My issue is that I have a large code base that is written to insert into foo as follows: insert into foo values ('fishing

问题 I have 100s of tables having the same schema and I have a trigger function to UPDATE some column whenever data is INSERTed into that table. Table Schema: CREATE TABLE symbol_daily_ohlc ( cdate date, open numeric(8,2), high numeric(8,2), low numeric(8,2), close numeric(8,2), sma8 numeric(8,2) ); Trigger function: create or replace function update_sma8() RETURNS TRIGGER AS $$ BEGIN UPDATE symbol_daily_ohlc d SET sma8 = s.simple_mov_avg FROM ( SELECT sec.cdate,AVG(sec.close) OVER(ORDER BY sec

问题 So I have table foo and I would like to delete other foo rows when trigger t_foo fires: CREATE OR REPLACE TRIGGER "t_foo" AFTER INSERT OR DELETE OR UPDATE ON foo /*delete some other records from foo that are not :NEW.* or :OLD.* \* How would I go about doing this without getting a ORA-04091: table name is mutating, trigger/function may not see it. Is this even possible? 回答1: Why not do this in a stored procedure, where you can wrap the insert and deletes in a transaction, and can clearly

问题 I'm trying to execute this auto generate query from PHP but it's not working INSERT INTO mvt (id_piece, article_id_article, code_mvt, origine_mvt, type_mvt, code_art, des_art, qte_old, qte_mvt, qte_new, link_piece) SELECT 32, 57, 'MVT/15/12/0001', 'BSR/15/12/001', 'S', 'ART_039', 'AAAA', a.qte_art, 1, a.qte_art - 1, 'uuuu' FROM article a WHERE a.id_article = 57 Structure of table mvt CREATE TABLE IF NOT EXISTS `mvt` ( `id_mvt` int(11) NOT NULL AUTO_INCREMENT, `id_piece` int(10) NOT NULL,

问题 In PostgreSQL I have this table... (there is a primary key serial column in the most left side "stmtserial" which is not shown in this image) in the table above, all columns are entered via queries, except the "time_index" which is automatically filled via a BEFORE INSERT, PER-ROW trigger. This is the code to create the same table (without any value) so everyone could create it using the Postgre SQL query panel. CREATE TABLE table_ebscb_spa_log04 ( pcnum smallint, stmtserial integer NOT NULL

问题 How can we invoke windows service (or) dll file from Oracle AFTER INSERT Trigger Any suggestion will be highly appreciated Best Regards, 回答1: You can run OS commands from plsql. This can be done as described in this AskTom post or this (preior to 11g) So, if you can call the service or dll from a script, then this might work 来源： https://stackoverflow.com/questions/14918695/invoke-windows-service-from-oracle-after-insert-trigger

问题 ))Hi all, this is my table... Currently Im using this function trigger... IF NEW.timetype = 'Total' THEN SELECT SUM(timeelapse) FROM (SELECT DISTINCT ON (floor(timeindex)::int) floor(timeindex)::int timeindex, timeelapse FROM mytable WHERE pcnum = NEW.pcnum AND fnname = NEW.fnname AND timetype = 'Lap' ORDER BY 1, 2 DESC) alias INTO v_sumtimeelapse_fn; IF FOUND THEN NEW.timeelapse := v_sumtimeelapse_fn; ELSE RAISE EXCEPTION USING MESSAGE = 'There is not any previous row...'; END IF; END IF; So

问题 I am wondering if is there a way to make a table writable only by an specific trigger in SQL Server or Oracle DB. Just to make an example: Table: "Operation" ID | Date | Account1_ID | Account2_ID | Amount Table: "Transactions" ID | Date | Account | Debt | Credit What I want to ensure is that the Transactions table only receive data from a trigger in the Operation table. Is there a way to achieve that? 回答1: Execute As allows you to create a trigger that runs as a user different to the current

问题 I would like to launch script after windows service start or restart. Like monitor wsupdate and at start or restart execute a batch script test.bat Any ideas ? 回答1: That could be easily done with a scheduled task: You just need to: 1) Start and Stop the Service to got the appropriate Events in the Eventlog. 2) taskschd.msc and create a new Costum Task. As Trigger you can select the Events created before with the start and/or stop action. 3) As Action call your cmd/bat, whatever you want. Hint

问题 I understand that this question has, in essence, already been asked, but that question did not have an unequivocal answer, so please bear with me. Background: In my company, we use Perforce submission numbers as part of our versioning. Regardless of whether this is a correct method or not, that is how things are. Currently, many developers do separate submissions for code and documentation: first the code and then the documentation to update the client-facing docs with what the new version