Horton

Re: UPDATE of partition key

Robert Haas <robertmhaas@gmail.com>

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From: Robert Haas <robertmhaas@gmail.com>
To: Amit Kapila <amit.kapila16@gmail.com>
Cc: Amit Khandekar <amitdkhan.pg@gmail.com>, Amit Langote <Langote_Amit_f8@lab.ntt.co.jp>, pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2017-05-11T11:57:14Z
Lists: pgsql-hackers 
On Thu, May 11, 2017 at 7:54 AM, Amit Kapila <amit.kapila16@gmail.com> wrote:
> Few comments:
> 1.
> Operating directly on partition doesn't allow update to move row.
> Refer below example:
> create table t1(c1 int) partition by range(c1);
> create table t1_part_1 partition of t1 for values from (1) to (100);
> create table t1_part_2 partition of t1 for values from (100) to (200);
> insert into t1 values(generate_series(1,11));
> insert into t1 values(generate_series(110,120));
>
> postgres=# update t1_part_1 set c1=122 where c1=11;
> ERROR:  new row for relation "t1_part_1" violates partition constraint
> DETAIL:  Failing row contains (122).

I think that's correct behavior.

-- 
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.