Horton

Re: unsupportable composite type partition keys

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Amit Langote <amitlangote09@gmail.com>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2019-12-25T20:45:47Z
Lists: pgsql-hackers 
Amit Langote <amitlangote09@gmail.com> writes:
>> On Sun, Dec 22, 2019 at 6:13 AM Tom Lane <tgl@sss.pgh.pa.us> wrote:
>>> I wonder whether we couldn't also lift
>>> the restriction against whole-row Vars in partition expressions.
>>> Doesn't seem like there is much difference between such a Var and
>>> a row(...)::table_rowtype expression.

> I gave that a try and ended up with attached that applies on top of
> your delay-loading-relcache-partition-data-2.patch.

Pushed with minor fixes.

			regards, tom lane

Commits

  1. Fix CheckAttributeType's handling of collations for ranges.

  2. Improve comments in utils/rel.h.

  3. Allow whole-row Vars to be used in partitioning expressions.

  4. Remove equalPartitionDescs().

  5. Load relcache entries' partitioning data on-demand, not immediately.

  6. Disallow partition key expressions that return pseudo-types.

  7. Prevent a rowtype from being included in itself via a range.