[英]How to use WITH in a Postgres function?
在函數中如何用as編寫? 我想編寫一個遞歸函數來計算汽車的重量。 它給了我這樣的錯誤:錯誤:“ WITH”或附近的語法錯誤
create or replace function aggregateWeight(p integer)
returns int as
$$
begin
if p in (select p.pid
from parts p) then
return (select p.weight
from parts p)
else
return
WITH RECURSIVE included_parts(pid, sid, quantity) AS (
SELECT ps.pid, ps.sid, ps.quantity
FROM partSubPart ps
UNION ALL
SELECT pr.pid, ps.sid, pr.quantity*ps.quantity
FROM included_parts pr, partSubPart ps
WHERE ps.pid = pr.sid
)
SELECT sum(pr.quantity*p.weight)
FROM included_parts pr, parts p
where pr.sid in (select p.pid from parts p)
GROUP BY pid;
end;
$$ language sql;
嘗試用括號將查詢括起來。
您還缺少END IF;
在ELSE
。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.