pgsql返回表错误:列引用不明确 [英] pgsql return table ERROR: column reference is ambiguous

问题描述

我一直收到此错误:列引用人"不明确.

I keep getting this ERROR: column reference "person" is ambiguous.

我需要返回一个TABLE(人整数).当我使用SETOF整数时，它工作正常，但是在这种情况下，它不起作用.我的另一个函数recurse()可以很好地返回一组整数.

It is required of me to return a TABLE (person integer). It works fine when I use SETOF integer but in this instance it doesn't work. My other function recurse() returns a set of integers perfectly well.

CREATE OR REPLACE FUNCTION try(_group text) RETURNS TABLE (person integer) AS $$ 
DECLARE
     _init_id integer;
     _record integer;
BEGIN
     SELECT id INTO _init_id FROM egroups WHERE name = _group;

    FOR _record in SELECT person FROM egroupdata WHERE egroup IN (SELECT recurse(_init_id))
    LOOP
        RETURN NEXT;
    END LOOP;

END;
$$ language plpgsql stable;

推荐答案

列引用不明确是由于存在多个同名列.在这种情况下，我想这是一个返回表的怪癖.尝试将查询更改为:

Ambiguous column references are due to there being more than one column available of the same name. In this case I guess it's a quirk of returning a table. Try changing the query to:

SELECT egroupdata.person FROM egroupdata WHERE egroup IN (SELECT recurse(_init_id))

这将消除列引用的歧义.

This will disambiguate the column reference.

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