Horton

Re: generic plans and "initial" pruning

Andres Freund <andres@anarazel.de>

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From: Andres Freund <andres@anarazel.de>
To: Amit Langote <amitlangote09@gmail.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, Alvaro Herrera <alvherre@alvh.no-ip.org>, Robert Haas <robertmhaas@gmail.com>, Jacob Champion <jchampion@timescale.com>, David Rowley <dgrowleyml@gmail.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2023-02-07T18:08:55Z
Lists: pgsql-hackers 
Hi,

On 2023-02-03 22:01:09 +0900, Amit Langote wrote:
> I've added a test case under src/modules/delay_execution by adding a
> new ExecutorStart_hook that works similarly as
> delay_execution_planner().  The test works by allowing a concurrent
> session to drop an object being referenced in a cached plan being
> initialized while the ExecutorStart_hook waits to get an advisory
> lock.  The concurrent drop of the referenced object is detected during
> ExecInitNode() and thus triggers replanning of the cached plan.
> 
> I also fixed a bug in the ExplainExecuteQuery() while testing and some comments.

The tests seem to frequently hang on freebsd:
https://cirrus-ci.com/github/postgresql-cfbot/postgresql/commitfest%2F42%2F3478

Greetings,

Andres Freund

Commits

  1. Stamp 19beta1.

  2. Revert "Don't lock partitions pruned by initial pruning"

  3. Ensure first ModifyTable rel initialized if all are pruned

  4. Fix bug in cbc127917 to handle nested Append correctly

  5. Remove unstable test suite added by 525392d57

  6. Don't lock partitions pruned by initial pruning

  7. Fix an oversight in cbc127917 to handle MERGE correctly

  8. Track unpruned relids to avoid processing pruned relations

  9. Perform runtime initial pruning outside ExecInitNode()

  10. Move PartitionPruneInfo out of plan nodes into PlannedStmt

  11. Fix setrefs.c's failure to do expression processing on prune steps.

  12. Remove obsolete executor cleanup code

  13. Revert "Move PartitionPruneInfo out of plan nodes into PlannedStmt"

  14. Move PartitioPruneInfo out of plan nodes into PlannedStmt

  15. Refactor and cleanup runtime partition prune code a little

  16. Remove some unnecessary fields from Plan trees.

  17. Remove more redundant relation locking during executor startup.

  18. Shut down Gather's children before shutting down Gather itself.