Horton

Re: Table AM Interface Enhancements

Pavel Borisov <pashkin.elfe@gmail.com>

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From: Pavel Borisov <pashkin.elfe@gmail.com>
To: Alexander Korotkov <aekorotkov@gmail.com>
Cc: Japin Li <japinli@hotmail.com>, Mark Dilger <mark.dilger@enterprisedb.com>, pgsql-hackers@lists.postgresql.org
Date: 2024-03-28T13:12:20Z
Lists: pgsql-hackers 
Hi, Alexander!

The other extensibility that seems quite clear and uncontroversial to me is
0006.

It simply shifts the decision on whether tuple inserts should invoke
inserts to the related indices to the table am level. It doesn't change the
current heap insert behavior so it's safe for the existing heap access
method. But new table access methods could redefine this (only for tables
created with these am's) and make index inserts independently
of ExecInsertIndexTuples inside their own implementations of
tuple_insert/tuple_multi_insert methods.

I'd propose changing the comment:

1405  * This function sets `*insert_indexes` to true if expects caller to
return
1406  * the relevant index tuples.  If `*insert_indexes` is set to false,
then
1407  * this function cares about indexes itself.

in the following way

Tableam implementation of tuple_insert should set `*insert_indexes` to true
if it expects the caller to insert the relevant index tuples (as in heap
 implementation). It should set `*insert_indexes` to false if it cares
about index inserts itself and doesn't want the caller to do index inserts.

Maybe, a commit message is also better to reformulate to describe better
who should do what.

I think, with rebase and correction in the comments/commit message patch
0006 is ready to be committed.

Regards,
Pavel Borisov.

Commits

  1. Remove extra comment at TableAmRoutine.scan_analyze_next_block

  2. revert: Generalize relation analyze in table AM interface

  3. Revert: Allow table AM to store complex data structures in rd_amcache

  4. Revert: Allow table AM tuple_insert() method to return the different slot

  5. Revert: Allow locking updated tuples in tuple_update() and tuple_delete()

  6. Revert: Let table AM insertion methods control index insertion

  7. Revert: Custom reloptions for table AM

  8. Provide a way block-level table AMs could re-use acquire_sample_rows()

  9. Custom reloptions for table AM

  10. Use streaming I/O in ANALYZE.

  11. Revert "Custom reloptions for table AM"

  12. Let table AM insertion methods control index insertion

  13. Generalize relation analyze in table AM interface

  14. Improve error message for tts_(virtual|minimal)_is_current_xact_tuple

  15. Add comments on some MinimalTupleSlots methods usage

  16. Add TupleTableSlotOps.is_current_xact_tuple() method

  17. Allow table AM tuple_insert() method to return the different slot

  18. Allow table AM to store complex data structures in rd_amcache