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CREATE OR REPLACE FUNCTION somefunction(ret refcursor, _id oid, _offset integer, _limit integer) RETURNS refcursor
LANGUAGE plpgsql
AS $_$
BEGIN
OPEN $1 FOR
--My actual select is much more complicated that this.
SELECT a FROM b
WHERE id = _id
ORDER BY otu.id desc
--does not work: invalid input syntax for integer: "ALL"
LIMIT (CASE WHEN _limit IS NULL THEN 'ALL' ELSE _limit END)
--CASE WHEN _limit IS NOT NULL THEN LIMIT _limit END
OFFSET (CASE WHEN _offset IS NULL THEN '0' ELSE _offset END);
RETURN $1;
END
$_$;
我希望_offset和_limit爲空,所以可以返回所有結果。如果_limit爲NULL,如何動態省略此查詢的LIMIT部分。動態省略限制條款
我知道這樣做的唯一方法是使查詢巨大的字符串,這將是醜陋的。
謝謝,我一直在尋找的8.1文檔。 – Keyo