Re: BUG #18705: Segmentation fault when create brin index on user-defined type.

On 11/14/24 03:40, PG Bug reporting form wrote:
> ...
>
> CREATE OPERATOR CLASS sva_special_ops FOR TYPE text using brin AS OPERATOR 1
> <#,
> OPERATOR 2 <=#, OPERATOR 3 >=#, OPERATOR 4 >#, function 1
> si_same(text,text);
> CREATE INDEX idx_special1 ON t_sva using brin(sva sva_special_ops);
>

I think this is a bit confused about CREATE OPERATOR CLASS. For BRIN
indexes this expects these 4 functions:

Support Function 1      internal function brin_minmax_opcinfo()
Support Function 2      internal function brin_minmax_add_value()
Support Function 3      internal function brin_minmax_consistent()
Support Function 4      internal function brin_minmax_union()

No wonder it crashes if CREATE OPERATOR CLASS passes si_same() instead
of brin_minmax_opcinfo.