commento/db/20190505191006-comment-count-decrease.sql

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-- This trigger is called every time a comment is deleted, so the comment count for the page where the comment belong is updated
CREATE OR REPLACE FUNCTION commentsDeleteTriggerFunction() RETURNS TRIGGER AS $trigger$
BEGIN
UPDATE pages
SET commentCount = commentCount - 1
WHERE domain = old.domain AND path = old.path;
DELETE FROM comments
WHERE parentHex = old.commentHex;
RETURN NEW;
END;
$trigger$ LANGUAGE plpgsql;