[Bug] Report some errors after using new user-defined access methods

[hw118118]

Cloudberry Database version

Any version

What happened

After add new like-intrenal index access method ( as like-btree, like-hash..), there are several problems as below.

• If you create a new op class by new access method and you create a table in partition key that include new defined op class, you will get a error. For example:
  CREATE FUNCTION my_int4_sort(int4,int4) RETURNS int LANGUAGE sql
AS $$ SELECT CASE WHEN $1 = $2 THEN 0 WHEN $1 > $2 THEN 1 ELSE -1 END; $$;
CREATE OPERATOR CLASS test_int4_ops FOR TYPE int4 USING usbtree AS
OPERATOR 1 < (int4,int4), OPERATOR 2 <= (int4,int4),
OPERATOR 3 = (int4,int4), OPERATOR 4 >= (int4,int4),
OPERATOR 5 > (int4,int4), FUNCTION 1 my_int4_sort(int4,int4);
CREATE TABLE partkey_t (a int4) PARTITION BY RANGE (a test_int4_ops);
  Because cbdb core will find a op class by BTREE_AM_OID when using partition key and not identify new defined opclass.

• When use onconflict clause , it still has the problem. For example:
  create table insertconflicttest(key int4, fruit text);
create unique index op_index_key on insertconflicttest(key, fruit text_pattern_ops);
insert into insertconflicttest values(0, 'Crowberry') on conflict (key, fruit text_pattern_ops) do nothing;
  In onconflict clause, it will find text_pattern_ops opclass by BTREE_AM_OID and compare result and existing index info. So it report a error that unmatched.

What you think should happen instead

Core idea is add a new hook that catch correct opclasses. For example, you can get all opclasses of BTREE_AM_OID firstly, if you can find target , you can find other opclasses in like-btree index access method(maybe user-defined).

How to reproduce

Please refer exmaples as above.

Operating System

Linux

Anything else

No response

Are you willing to submit PR?

• Yes, I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct.

[github-actions]

Hey, @hw118118 welcome!🎊 Thanks for taking the time to point this out.🙌