# pg_amop

The `pg_amop` table stores information about operators associated with index access method operator classes. There is one row for each operator that is a member of an operator class.



Table 1. `pg_catalog.pg_amop`

| column         | type     | references      | description                                                  |
| :------------- | :------- | :-------------- | :----------------------------------------------------------- |
| `amopclaid`    | oid      | pg_opclass.oid  | The index operator class this entry is for                   |
| `amopsubtype`  | oid      | pg_type.oid     | Subtype to distinguish multiple entries for one strategy; zero for default |
| `amopstrategy` | smallint |                 | Operator strategy number                                     |
| `amopreqcheck` | boolean  |                 | Index hit must be rechecked                                  |
| `amopopr`      | oid      | pg_operator.oid | OID of the operator                                          |