Horton

Re: UPDATE of partition key

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

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From: Amit Langote <Langote_Amit_f8@lab.ntt.co.jp>
To: Amit Khandekar <amitdkhan.pg@gmail.com>, Robert Haas <robertmhaas@gmail.com>
Cc: pgsql-hackers <pgsql-hackers@postgresql.org>, Thomas Munro <thomas.munro@enterprisedb.com>
Date: 2017-11-07T06:00:06Z
Lists: pgsql-hackers 
On 2017/11/07 14:40, Amit Khandekar wrote:
> On 7 November 2017 at 00:33, Robert Haas <robertmhaas@gmail.com> wrote:
> 
>> Also, +1 for Amit Langote's idea of trying to merge
>> mt_perleaf_childparent_maps with mt_persubplan_childparent_maps.
> 
> Currently I am trying to see if it simplifies things if we do that. We
> will be merging these arrays into one, but we are adding a new int[]
> array that maps subplans to leaf partitions. Will get back with how it
> looks finally.

One thing to note is that the int[] array I mentioned will be much faster
to compute than going to convert_tuples_by_name() to build the additional
maps array.

Thanks,
Amit

Commits

  1. Avoid referencing off the end of subplan_partition_offsets.

  2. Allow UPDATE to move rows between partitions.

  3. Remove useless lookup of root partitioned rel in ExecInitModifyTable().

  4. Factor error generation out of ExecPartitionCheck.

  5. Minor preparatory refactoring for UPDATE row movement.

  6. Simplify and encapsulate tuple routing support code.

  7. Avoid coercing a whole-row variable that is already coerced.

  8. Use ResultRelInfo ** rather than ResultRelInfo * for tuple routing.

  9. Make RelationGetPartitionDispatchInfo expand depth-first.

  10. Expand partitioned tables in PartDesc order.

  11. Use a real RT index when setting up partition tuple routing.

  12. Fix transition tables for partition/inheritance.

  13. Fix confusion about number of subplans in partitioned INSERT setup.

  14. Prevent BEFORE triggers from violating partitioning constraints.

  15. Fire per-statement triggers on partitioned tables.

  16. Fix reporting of violations in ExecConstraints, again.

  17. Don't scan partitioned tables.

  18. Allow FDWs to push down quals without breaking EvalPlanQual rechecks.