Re: pgsql: Fix mistaken failure to allow parallelism in corner case.

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Robert Haas <rhaas(at)postgresql(dot)org>
Cc: pgsql-committers(at)postgresql(dot)org
Subject: Re: pgsql: Fix mistaken failure to allow parallelism in corner case.
Date: 2017-10-27 14:19:34
Message-ID: 4035.1509113974@sss.pgh.pa.us
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Robert Haas <rhaas(at)postgresql(dot)org> writes:
> Fix mistaken failure to allow parallelism in corner case.

You can't insert fields into the middle of a widely-known struct
in the back branches. In v10, this broke ABI compatibility for
any extension touching estate->es_query_dsa, which seems unlikely
to be the empty set.

regards, tom lane

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