Hi, I found that things could go wrong in some cases, when the unique index and the partition key use different opclass.
For example: ``` CREATE TABLE ptop_test (a int, b int, c int) PARTITION BY LIST (a); CREATE TABLE ptop_test_p1 PARTITION OF ptop_test FOR VALUES IN ('1'); CREATE TABLE ptop_test_m1 PARTITION OF ptop_test FOR VALUES IN ('-1'); CREATE UNIQUE INDEX ptop_test_unq_abs_a ON ptop_test (a abs_int_btree_ops); -- this should fail ``` In this example, `abs_int_btree_ops` is a opclass whose equality operator is customized to consider ‘-1’ and ‘1’ as equal. So the unique index should not be allowed to create, since ‘-1’ and ‘1’ will be put in different partition. The attached patch should fix this problem.
0001-Check-operator-when-creating-UNIQUE-index-on-PARTITI.patch
Description: Binary data
Best Regards, Guancheng Luo