Horton

Re: Partition-wise join for join between (declaratively) partitioned tables

Amit Langote <langote_amit_f8@lab.ntt.co.jp>

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From: Amit Langote <Langote_Amit_f8@lab.ntt.co.jp>
To: Robert Haas <robertmhaas@gmail.com>, Ashutosh Bapat <ashutosh.bapat@enterprisedb.com>
Cc: Etsuro Fujita <fujita.etsuro@lab.ntt.co.jp>, Thomas Munro <thomas.munro@enterprisedb.com>, Rafia Sabih <rafia.sabih@enterprisedb.com>, Rajkumar Raghuwanshi <rajkumar.raghuwanshi@enterprisedb.com>, pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2017-09-15T00:38:55Z
Lists: pgsql-hackers 
On 2017/09/15 4:43, Robert Haas wrote:
> On Thu, Sep 14, 2017 at 8:06 AM, Ashutosh Bapat
> <ashutosh.bapat@enterprisedb.com> wrote:
>> I have few changes to multi-level expansion patch as per discussion in
>> earlier mails
> 
> OK, I have committed
> 0002-Multi-level-partitioned-table-expansion.patch with a few cosmetic
> changes.
> 
> Phew, getting that sorted out has been an astonishing amount of work.

Yeah, thanks to both of you.  Now on to other complicated stuff. :)

Regards,
Amit

Commits

  1. Add test for partitionwise join involving default partition.

  2. Rewrite the code that applies scan/join targets to paths.

  3. Fix code related to partitioning schemes for dropped columns.

  4. Copy information from the relcache instead of pointing to it.

  5. Basic partition-wise join functionality.

  6. Associate partitioning information with each RelOptInfo.

  7. Expand partitioned table RTEs level by level, without flattening.

  8. Set partitioned_rels appropriately when UNION ALL is used.

  9. Remove dedicated B-tree root-split record types.

  10. Assorted preparatory refactoring for partition-wise join.

  11. Teach adjust_appendrel_attrs(_multilevel) to do multiple translations.

  12. Avoid unnecessary single-child Append nodes.

  13. Revisit handling of UNION ALL subqueries with non-Var output columns.