From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | pgsql-committers(at)postgresql(dot)org |
Subject: | pgsql: Oops, missed one fix for EquivalenceClass rearrangement. |
Date: | 2010-10-29 18:45:25 |
Message-ID: | E1PBtx7-00041i-Se@gemulon.postgresql.org |
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Lists: | pgsql-committers |
Oops, missed one fix for EquivalenceClass rearrangement.
Now that we're expecting a mergeclause's left_ec/right_ec to persist from
the initial assignments, we can't just blithely zero these out when
transforming such a clause in adjust_appendrel_attrs. But really it should
be okay to keep the parent's values, since a child table's derived Var
ought to be equivalent to the parent Var for all EquivalenceClass purposes.
(Indeed, I'm wondering whether we couldn't find a way to dispense with
add_child_rel_equivalences altogether. But this is wrong in any case.)
Branch
------
master
Details
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http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=48a1fb23900d73e7d9cb2dc0408c745cd03597a7
Modified Files
--------------
src/backend/optimizer/prep/prepunion.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
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