SYSTEM CATALOG · System catalog

pg_operator

PostgreSQL documentation ↗Source definition ↗

The catalog pg_operator stores information about operators. See CREATE OPERATOR and Section 36.14 for more information.

First seen PG 9.0Last seen PG 19Columns 15

9.0 9.1 9.2 9.3 9.4 9.5 9.6 10 11 12 13 14 15 16 17 18 19^β3

Checked column by column against a PostgreSQL 18.6 instance · Raw measurement record ↗

Columns PostgreSQL 18

pg_operator

COLUMN	TYPE	DESCRIPTION
`oid`	`oid`NOT NULL	Row identifier
`oprname`	`name`NOT NULL	Name of the operator
`oprnamespace`	`oid`NOT NULL	The OID of the namespace that contains this operatorReferences:`pg_namespace.oid`
`oprowner`	`oid`NOT NULL	Owner of the operatorReferences:`pg_authid.oid`
`oprkind`	`"char"`NOT NULLDocumented as:`char`	b = infix operator (“both”), or l = prefix operator (“left”)
`oprcanmerge`	`boolean`NOT NULLDocumented as:`bool`	This operator supports merge joins
`oprcanhash`	`boolean`NOT NULLDocumented as:`bool`	This operator supports hash joins
`oprleft`	`oid`NOT NULL	Type of the left operand (zero for a prefix operator)References:`pg_type.oid`
`oprright`	`oid`NOT NULL	Type of the right operandReferences:`pg_type.oid`
`oprresult`	`oid`NOT NULL	Type of the result (zero for a not-yet-defined “shell” operator)References:`pg_type.oid`
`oprcom`	`oid`NOT NULL	Commutator of this operator (zero if none)References:`pg_operator.oid`
`oprnegate`	`oid`NOT NULL	Negator of this operator (zero if none)References:`pg_operator.oid`
`oprcode`	`regproc`NOT NULL	Function that implements this operator (zero for a not-yet-defined “shell” operator)References:`pg_proc.oid`
`oprrest`	`regproc`NOT NULL	Restriction selectivity estimation function for this operator (zero if none)References:`pg_proc.oid`
`oprjoin`	`regproc`NOT NULL	Join selectivity estimation function for this operator (zero if none)References:`pg_proc.oid`

Columns marked "implicit" are not included in SELECT *; some early statistics views are completed from same-version source, and the extra provenance is shown in the column description.

Common system columns 6

System attributes PostgreSQL provides, normally not expanded by SELECT *. Kept separately so they are not mixed in with ordinary columns.

Columns	Type	attnum
`tableoid`	`oid`	-6
`cmax`	`cid`	-5
`xmax`	`xid`	-4
`cmin`	`cid`	-3
`xmin`	`xid`	-2
`ctid`	`tid`	-1

Column evolution matrix

Hover a cell for the column type

PresentAdded / type or attribute changeRemoved

COLUMN	9.0	9.1	9.2	9.3	9.4	9.5	9.6	10	11	12	13	14	15	16	17	18	19
`oid`
`oprname`
`oprnamespace`
`oprowner`
`oprkind`
`oprcanmerge`
`oprcanhash`
`oprleft`
`oprright`
`oprresult`
`oprcom`
`oprnegate`
`oprcode`
`oprrest`
`oprjoin`

9.0 is the coverage baseline; a column already present in the baseline is not marked as added. The matrix aligns columns by name, so a rename appears as the old column removed and a new column added.

Evolution timeline

Changes between adjacent majors

PostgreSQL 17 ← 16

Catalog description updated

PostgreSQL 14 ← 13

8 column description updatesCatalog description updated

PostgreSQL 12 ← 11

~ oid: implicit → ordinary1 column description updatesCatalog description updated

PostgreSQL 11 ← 10

Catalog description updated

PostgreSQL 10 ← 9.6

1 column description updatesCatalog description updated

PostgreSQL 9.6 ← 9.5

Catalog description updated

PostgreSQL 9.3 ← 9.2

1 column description updates

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