我有一个函数用作插入触发器.此函数用于删除与插入行的[序列号]冲突的行.它运行得很好，所以我真的不想讨论这个概念的优点.
DECLARE
re1 feeds_item.shareurl%TYPE;
BEGIN
SELECT regexp_replace(NEW.shareurl, '/[^/]+(-[0-9]+\.html)$','/[^/]+\\1') INTO re1;
RAISE NOTICE 'DELETEing rows from feeds_item where shareurl ~ ''%''', re1;
DELETE FROM feeds_item where shareurl ~ re1;
RETURN NEW;
END;
我想在通知中添加一个指示，说明有多少行受到影响(aka:deleted).我该怎么做(使用"plpgsql"语言)？
UPDATE:
DECLARE
re1 feeds_item.shareurl%TYPE;
num_rows int;
BEGIN
SELECT regexp_replace(NEW.shareurl, '/[^/]+(-[0-9]+\.html)$','/[^/]+\\1') INTO re1;
DELETE FROM feeds_item where shareurl ~ re1;
IF FOUND THEN
GET DIAGNOSTICS num_rows = ROW_COUNT;
RAISE NOTICE 'DELETEd % row(s) from feeds_item where shareurl ~ ''%''', num_rows, re1;
END IF;
RETURN NEW;
END;