SYSTEM CATALOG · System catalog

pg_range

PostgreSQL documentation ↗Source definition ↗

The catalog pg_range stores information about range types. This is in addition to the types' entries in pg_type.

First seen PG 9.2Last seen PG 19Columns 7

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_range

COLUMN	TYPE	DESCRIPTION
`rngtypid`	`oid`NOT NULL	OID of the range typeReferences:`pg_type.oid`
`rngsubtype`	`oid`NOT NULL	OID of the element type (subtype) of this range typeReferences:`pg_type.oid`
`rngmultitypid`	`oid`NOT NULL	OID of the multirange type for this range typeReferences:`pg_type.oid`
`rngcollation`	`oid`NOT NULL	OID of the collation used for range comparisons, or zero if noneReferences:`pg_collation.oid`
`rngsubopc`	`oid`NOT NULL	OID of the subtype's operator class used for range comparisonsReferences:`pg_opclass.oid`
`rngcanonical`	`regproc`NOT NULL	OID of the function to convert a range value into canonical form, or zero if noneReferences:`pg_proc.oid`
`rngsubdiff`	`regproc`NOT NULL	OID of the function to return the difference between two element values as double precision, or zero if noneReferences:`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
`rngtypid`	–	–
`rngsubtype`	–	–
`rngcollation`	–	–
`rngsubopc`	–	–
`rngcanonical`	–	–
`rngsubdiff`	–	–
`rngmultitypid`	–	–	–	–	–	–	–	–	–	–	–
`rngconstruct2`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`rngconstruct3`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`rngmltconstruct0`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`rngmltconstruct1`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`rngmltconstruct2`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–

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 19 ← 18

+ rngconstruct2+ rngconstruct3+ rngmltconstruct0+ rngmltconstruct1+ rngmltconstruct2

PostgreSQL 14 ← 13

+ rngmultitypid3 column description updates

PostgreSQL 9.2 ← 9.1Catalog added

+ rngtypid+ rngsubtype+ rngcollation+ rngsubopc+ rngcanonical+ rngsubdiff

Compare any two versions

FROMTOInclude description updates

Pick two versions to see added, removed, and retyped columns. The interactive comparison needs JavaScript; the evolution timeline reads fine without it.