Horton

Re: [HACKERS] UPDATE of partition key

Robert Haas <robertmhaas@gmail.com>

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From: Robert Haas <robertmhaas@gmail.com>
To: Amit Khandekar <amitdkhan.pg@gmail.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, Amit Langote <Langote_Amit_f8@lab.ntt.co.jp>, pgsql-hackers <pgsql-hackers@postgresql.org>, Thomas Munro <thomas.munro@enterprisedb.com>
Date: 2018-01-22T12:40:30Z
Lists: pgsql-hackers 
On Mon, Jan 22, 2018 at 2:44 AM, Amit Khandekar <amitdkhan.pg@gmail.com> wrote:
> Yes, right, that's what is happening. It is not happening on an Assert
> though (there is no assert in that function). It is happening when we
> try to access the array here :
>
>                 if (proute->subplan_partition_offsets &&
>                         proute->subplan_partition_offsets[subplan_index] == i)
>
> Attached is a fix, where I have introduced another field
> PartitionTupleRouting.num_ subplan_partition_offsets, so that above,
> we can add another condition (subplan_index <
> proute->num_subplan_partition_offsets) in order to stop accessing the
> array once we are done with all the offset array elements.
>
> Ran the update.sql test with valgrind enabled on my laptop, and the
> valgrind output now does not show errors.

Tom, do you want to double-check that this fixes it for you?

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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.