背景:由於項目遷移自別的數據庫,索引都帶引號,並且大小寫區分,遷移到pg中想去掉引號不區分大小寫(全是廢話,見代碼)
create or replace function changetolower() returns void
AS
$$
DECLARE
cursse refcursor;
iname char(64);
iname2 char(64);
begin
open cursse for select indexname from pg_indexes where schemaname='public';
fetch cursse into iname;
WHILE FOUND LOOP
iname2 = iname;
--//見備註
begin
EXECUTE 'alter index '||E'\"'||iname||E'\"'||' rename to '||iname2;
EXCEPTION
WHEN OTHERS THEN
RAISE NOTICE '%,%', iname,sqlerrm;
fetch cursse into iname;
continue;
end;
RAISE NOTICE 'change index %sucess',iname;
fetch cursse into iname;
END LOOP;
end;
$$
LANGUAGE PLPGSQL;
備註:
查出來的數據不包含雙引號,所以沒必要進行替換
如果不放心可以使用這句
iname2 = lower(REPLACE(iname,E’\”’,E’\”));
替代
iname2 = iname;