pgsql: Throw an appropriate error if ALTER COLUMN TYPE finds a dependen

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Throw an appropriate error if ALTER COLUMN TYPE finds a dependen
Date: 2010-10-02 22:29:05
Message-ID: E1P2AZl-0005YA-35@gemulon.postgresql.org
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Throw an appropriate error if ALTER COLUMN TYPE finds a dependent trigger.

Actually making this case work, if the column is used in the trigger's
WHEN condition, will take some new code that probably isn't appropriate
to back-patch. For now, just throw a FEATURE_NOT_SUPPORTED error rather
than allowing control to reach the "unexpected object" case. Per bug #5688
from Daniel Grace. Back-patch to 9.0 where the possibility of such a
dependency was introduced.

Branch
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master

Details
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http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=1f0b62e8c28026f5d1d3693087f7b4aef6a191af

Modified Files
--------------
src/backend/commands/tablecmds.c | 19 ++++++++++++++++++-
1 files changed, 18 insertions(+), 1 deletions(-)

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