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Convert PathKey to use CompareType

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Change the PathKey struct to use CompareType to record the sort
direction instead of hardcoding btree strategy numbers.  The
CompareType is then converted to the index-type-specific strategy when
the plan is created.

This reduces the number of places btree strategy numbers are
hardcoded, and it's a self-contained subset of a larger effort to
allow non-btree indexes to behave like btrees.

Author: Mark Dilger <mark.dilger@enterprisedb.com>
Co-authored-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://www.postgresql.org/message-id/flat/E72EAA49-354D-4C2E-8EB9-255197F55330@enterprisedb.com
This commit is contained in:
Peter Eisentraut
2025-04-04 11:13:54 +02:00
parent daa16893fa
commit 8123e91f5a
8 changed files with 44 additions and 47 deletions
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2
contrib/postgres_fdw/postgres_fdw.c
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@ -999,7 +999,7 @@ get_useful_pathkeys_for_relation(PlannerInfo *root, RelOptInfo *rel)
/* Looks like we can generate a pathkey, so let's do it. */
pathkey = make_canonical_pathkey(root, cur_ec,
linitial_oid(cur_ec->ec_opfamilies),
BTLessStrategyNumber,
COMPARE_LT,
false);
useful_pathkeys_list = lappend(useful_pathkeys_list,
list_make1(pathkey));