| PostgreSQL 9.1.14 Documentation | ||||
|---|---|---|---|---|
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The catalog pg_operator stores information about operators. See CREATE OPERATOR and Section 35.12 for more information.
Table 45-32. pg_operator Columns
| Name | Type | References | Description | 
|---|---|---|---|
| oprname | name | Name of the operator | |
| oprnamespace | oid | pg_namespace.oid | The OID of the namespace that contains this operator | 
| oprowner | oid | pg_authid.oid | Owner of the operator | 
| oprkind | char | b = infix ("both"), l = prefix ("left"), r = postfix ("right") | |
| oprcanmerge | bool | This operator supports merge joins | |
| oprcanhash | bool | This operator supports hash joins | |
| oprleft | oid | pg_type.oid | Type of the left operand | 
| oprright | oid | pg_type.oid | Type of the right operand | 
| oprresult | oid | pg_type.oid | Type of the result | 
| oprcom | oid | pg_operator.oid | Commutator of this operator, if any | 
| oprnegate | oid | pg_operator.oid | Negator of this operator, if any | 
| oprcode | regproc | pg_proc.oid | Function that implements this operator | 
| oprrest | regproc | pg_proc.oid | Restriction selectivity estimation function for this operator | 
| oprjoin | regproc | pg_proc.oid | Join selectivity estimation function for this operator | 
Unused column contain zeroes. For example, oprleft is zero for a prefix operator.