database-trigger

问题 I have two tables in my database, Work_Order table which is the source table where work order information's stored i also have Work_Schedule table which contains work schedules which tell peoples in the production floor what to build, when and how much to build. Work_Order Table looks like Work order ItemCode Size Qty Qty_per_HR 41051 600111 14L-16.1 55 10 I want duplicate the above work order line in work order table above based on the Qty per hour and automatically create a work scheduler

问题 I have two tables in my database, Work_Order table which is the source table where work order information's stored i also have Work_Schedule table which contains work schedules which tell peoples in the production floor what to build, when and how much to build. Work_Order Table looks like Work order ItemCode Size Qty Qty_per_HR 41051 600111 14L-16.1 55 10 I want duplicate the above work order line in work order table above based on the Qty per hour and automatically create a work scheduler

问题 Is there a way to get the JSON of the only modified fields? Now I use the following trigger but the entire line is printed in the changelog. Example tables: TABLE tbl_changelog ( tbl TEXT, op TEXT, new JSON, old JSON ); TABLE tbl_items ( f1 TEXT, f2 TEXT ); Trigger: CREATE OR REPLACE FUNCTION changelog_procedure() RETURNS trigger AS $$ BEGIN INSERT INTO tbl_changelog(tbl, op, new, old) VALUES (TG_TABLE_NAME, TG_OP, row_to_json(NEW), row_to_json(OLD)); RETURN NULL; END; $$ LANGUAGE plpgsql

来源： https://stackoverflow.com/questions/53004037/output-clause-vs-triggers

来源： https://stackoverflow.com/questions/61541532/run-python-script-from-postgresql-function

来源： https://stackoverflow.com/questions/55336035/is-it-possible-and-how-create-a-trigger-with-entity-framework-core

来源： https://stackoverflow.com/questions/55336035/is-it-possible-and-how-create-a-trigger-with-entity-framework-core

问题 Update : I use "$match expression" to describe this but I don't actually use the $match operator. According to the docs, the selector should conform with $match's syntax, though the $match keyword is apparently not necessary in the actual expression. Update 2 : In the actual collection, outerField represents message , fieldA represents fansNo , and fieldB represents sharedNo . So outerField.fieldA represents message.fansNo and outerField.fieldB represents message.sharedNo . This is a

问题 Update : I use "$match expression" to describe this but I don't actually use the $match operator. According to the docs, the selector should conform with $match's syntax, though the $match keyword is apparently not necessary in the actual expression. Update 2 : In the actual collection, outerField represents message , fieldA represents fansNo , and fieldB represents sharedNo . So outerField.fieldA represents message.fansNo and outerField.fieldB represents message.sharedNo . This is a

问题 CREATE OR REPLACE FUNCTION nearest_segment_insert() RETURNS trigger AS DECLARE id_temp integer; $BODY$ BEGIN IF OLD.id = NULL THEN select test_route.id into id_temp,ST_Distance(test_route.the_geom,NEW.the_geom) FROM test_route, ORDER BY 2 ASC LIMIT 1; UPDATE SET p.edges_id = r.id, p.the_geom = r.the_geom, p.dist_val = r.distance, r.distance = -1 FROM test_route r, road_block p, WHERE id_temp = r.id ; END IF; RETURN NEW; END; $BODY$ I am getting error "syntax error at or near "BEGIN". 回答1: The