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Generalize hash and ordering support in amapi

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Stop comparing access method OID values against HASH_AM_OID and
BTREE_AM_OID, and instead check the IndexAmRoutine for an index to see
if it advertises its ability to perform the necessary ordering,
hashing, or cross-type comparing functionality.  A field amcanorder
already existed, this uses it more widely.  Fields amcanhash and
amcancrosscompare are added for the other purposes.

Author: Mark Dilger <mark.dilger@enterprisedb.com>
Discussion: https://www.postgresql.org/message-id/flat/E72EAA49-354D-4C2E-8EB9-255197F55330@enterprisedb.com
This commit is contained in:
Peter Eisentraut
2025-02-27 17:03:31 +01:00
parent 6eb8a1a4f9
commit ce62f2f2a0
14 changed files with 50 additions and 26 deletions
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8
src/backend/utils/cache/lsyscache.c vendored
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@@ -716,10 +716,9 @@ equality_ops_are_compatible(Oid opno1, Oid opno2)
{
HeapTuple op_tuple = &catlist->members[i]->tuple;
Form_pg_amop op_form = (Form_pg_amop) GETSTRUCT(op_tuple);
IndexAmRoutine *amroutine = GetIndexAmRoutineByAmId(op_form->amopmethod, false);
/* must be btree or hash */
if (op_form->amopmethod == BTREE_AM_OID ||
op_form->amopmethod == HASH_AM_OID)
if (amroutine->amcancrosscompare)
{
if (op_in_opfamily(opno2, op_form->amopfamily))
{
@@ -767,8 +766,9 @@ comparison_ops_are_compatible(Oid opno1, Oid opno2)
{
HeapTuple op_tuple = &catlist->members[i]->tuple;
Form_pg_amop op_form = (Form_pg_amop) GETSTRUCT(op_tuple);
IndexAmRoutine *amroutine = GetIndexAmRoutineByAmId(op_form->amopmethod, false);
if (op_form->amopmethod == BTREE_AM_OID)
if (amroutine->amcanorder && amroutine->amcancrosscompare)
{
if (op_in_opfamily(opno2, op_form->amopfamily))
{