The core PostgreSQL distribution includes the GIN operator classes shown in Table 64.1. (Some of the optional modules described in Appendix F provide additional GIN operator classes.)
Table 64.1. Built-in GIN Operator Classes
| Name | Indexed Data Type | Indexable Operators | 
|---|---|---|
| array_ops | anyarray | &&<@=@> | 
| jsonb_ops | jsonb | ??&?|@> | 
| jsonb_path_ops | jsonb | @> | 
| tsvector_ops | tsvector | @@@@@ | 
  Of the two operator classes for type jsonb, jsonb_ops
  is the default.  jsonb_path_ops supports fewer operators but
  offers better performance for those operators.
  See Section 8.14.4 for details.