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Re: Index AM API cleanup

Peter Eisentraut <peter@eisentraut.org>

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From: Peter Eisentraut <peter@eisentraut.org>
To: Mark Dilger <mark.dilger@enterprisedb.com>
Cc: PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Date: 2025-03-12T10:40:44Z
Lists: pgsql-hackers

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While studying the patch "[PATCH v21 08/12] Allow non-btree indexes to 
participate in mergejoin", I figured we could do the sortsupport.c piece 
much simpler.  The underlying issue there is similar to commits 
0d2aa4d4937 and c594f1ad2ba: We're just using the btree strategy numbers 
to pass information about the sort direction.  We can do this simpler by 
just passing a bool.  See attached patch.

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Relax ordering-related hardcoded btree requirements in planning

  2. Support non-btree indexes in get_actual_variable_range()

  3. Convert PathKey to use CompareType

  4. Generalize index support in network support function

  5. Update a code comment

  6. Allow non-btree unique indexes for matviews

  7. Allow non-btree unique indexes for partition keys

  8. Add some opfamily support functions to lsyscache.c

  9. Simplify and generalize PrepareSortSupportFromIndexRel()

  10. Generalize hash and ordering support in amapi

  11. Drop opcintype from index AM strategy translation API

  12. Allow non-btree speculative insertion indexes

  13. Support non-btree indexes for foreign keys

  14. Integrate GistTranslateCompareType() into IndexAmTranslateCompareType()

  15. Convert strategies to and from compare types

  16. Move CompareType to separate header file

  17. Add get_opfamily_name() function

  18. Rename GistTranslateStratnum() to GistTranslateCompareType()

  19. Change gist stratnum function to use CompareType

  20. Rename RowCompareType to CompareType

  21. Improve slightly misleading internal error message

  22. Track scan reversals in MergeJoin

  23. Track sort direction in SortGroupClause

  24. Add stratnum GiST support function

  25. Add amgettreeheight index AM API routine