Postgresql trigger update another table
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От: Achilleus Mantzios: Тема: Re: Triggers: Дата: 22 ноября 2005 г. PostgreSQL Projects for $140 - $450. I have a table that store daily sales records, I need a trigger /function that anytime rhw daily sales table is updated (or a value is inserted), the trigger updates the values on another table that st. Disabling a trigger is something that you may need to do at certain times especially when performing admin tasks on a table. What is important to note here is that you need to be a bit careful, and make sure that table bloat does not take over. Technically, it is a DELETE / INSERT, which is prone to cause table bloat. Make sure a proper VACUUMpolicy is in place. Finally Materialized views are an important feature in most databases, including PostgreSQL.
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- UPDATE : This keyword determines the type of event which fires the trigger. Ex. UPDATE, INSERT, DELETE, TRUNCATE. ON x : x here determines to which DB table this trigger should be attached to. In ...
- Aug 08, 2017 · CREATE TRIGGER table_b_aiu AFTER INSERT OR UPDATE ON table_b FOR EACH ROW WHEN (((new.status = 100) OR (new.status = 200))) EXECUTE PROCEDURE table_b_aiu(); CREATE OR REPLACE FUNCTION table_b_aiu() RETURNS trigger AS $BODY$ BEGIN UPDATE table_a a SET status = 100 FROM table_b b WHERE (b.status = 100 or b.status = 200) AND a.section_id = b.section_id; RETURN new; END; $BODY$ LANGUAGE plpgsql VOLATILE COST 100;
- PostgreSQL 9.6 table partitioning doesn't support the creation of foreign keys on the parent table. Alternative solutions include application-centric methods such as using triggers/functions or creating these on the individual tables. PostgreSQL doesn't support SPLIT and EXCHANGE of table partitions. For these actions, you will need to plan ...
- Listing user privileges is simple. In psql, use the query \du+ as shown in the output below: $ postgres=# \du+. The above output shows the Postgres and temp users with their corresponding permissions. Another way to do this is to use the information_schema schema and query the table_privileges table as: $ SELECT * FROM information_schema.table.
- Jul 30, 2018 · By building DML code into PostgreSQL, we can avoid duplicate implementation of data-related code in multiple separate applications that interface with the database. This ensures consistent execution of DML for data validation, data cleansing, or other functionality such as data auditing (i.e., logging changes) or maintaining a summary table independently of any calling application. In this ...