pgsql/src/backend/optimizer/prep prepunion.c

From: tgl(at)postgresql(dot)org (Tom Lane)
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql/src/backend/optimizer/prep prepunion.c
Date: 2002-03-05 05:10:26
Message-ID: 20020305051026.49EAD4758FE@postgresql.org
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CVSROOT: /cvsroot
Module name: pgsql
Changes by: tgl(at)postgresql(dot)org 02/03/05 00:10:25

Modified files:
src/backend/optimizer/prep: prepunion.c

Log message:
Previous patch to mark UNION outputs with common typmod (if any) breaks
three-or-more-way UNIONs, as per example from Josh Berkus. Cause is a
fragile assumption that one tlist's entries will exactly match another.
Restructure code to make that assumption a little less fragile.

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