pgsql: Ensure an index that uses a whole-row Var still depends on its t - Mailing list pgsql-committers

From Tom Lane
Subject pgsql: Ensure an index that uses a whole-row Var still depends on its t
Date
Msg-id E1PDODF-0001wa-Hm@gemulon.postgresql.org
Whole thread Raw
List pgsql-committers
Ensure an index that uses a whole-row Var still depends on its table.

We failed to record any dependency on the underlying table for an index
declared like "create index i on t (foo(t.*))".  This would create trouble
if the table were dropped without previously dropping the index.  To fix,
simplify some overly-cute code in index_create(), accepting the possibility
that sometimes the whole-table dependency will be redundant.  Also document
this hazard in dependency.c.  Per report from Kevin Grittner.

In passing, prevent a core dump in pg_get_indexdef() if the index's table
can't be found.  I came across this while experimenting with Kevin's
example.  Not sure it's a real issue when the catalogs aren't corrupt, but
might as well be cautious.

Back-patch to all supported versions.

Branch
------
REL9_0_STABLE

Details
-------
http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=e84bf651216a80c1d0c0d14901dea244c6a333ab

Modified Files
--------------
src/backend/catalog/dependency.c  |   15 ++++++++++++++-
src/backend/catalog/index.c       |   15 +++++----------
src/backend/utils/adt/ruleutils.c |   24 +++++++++++++++++++++---
3 files changed, 40 insertions(+), 14 deletions(-)


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