Andres Freund <and...@anarazel.de> writes:
> On 2016-09-02 10:20:42 -0400, Tom Lane wrote:
>> ... ISTM all we
>> need is that the SRF be on the inside of the join, which is automatic
>> if it's LATERAL.
> Right. But there's nothing to force a lateral reference to be there
> intrinsically. I've added a "fake" lateral reference to the ROWS FROM
> RTE to the subquery, when there's none otherwise, but that's not
> entirely pretty.
Hm, do you get cases like this right:
select generate_series(1, t1.a) from t1, t2;
That would result in a lateral ref from the SRF RTE to t1, but you really
need to treat it as laterally dependent on the join of t1/t2 in order to
preserve the old semantics. That is, you need to be laterally dependent
on the whole FROM clause regardless of which variable references appear.
regards, tom lane
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