| PostgreSQL 8.3.3 Documentation | ||||
|---|---|---|---|---|
| Prev | Fast Backward | Chapter 44. System Catalogs | Fast Forward | Next |
The catalog pg_operator stores information about operators. See CREATE OPERATOR and Section 34.12 for more information.
Table 44-26. 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.
No comments could be found for this page.
Please use this form to add your own comments regarding your experience with particular features of PostgreSQL, clarifications of the documentation, or hints for other users. Please note, this is not a support forum, and your IP address will be logged. If you have a question or need help, please see the faq, try a mailing list, or join us on IRC. Note that submissions containing URLs or other keywords commonly found in 'spam' comments may be silently discarded. Please contact the webmaster if you think this is happening to you in error.
In order to submit a comment, you must have a community account.
* denotes required field