SYSTEM CATALOG · System catalog

pg_sequence

PostgreSQL documentation ↗Source definition ↗

The catalog pg_sequence contains information about sequences. Some of the information about sequences, such as the name and the schema, is in pg_class

First seen PG 10Last seen PG 19Columns 8

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_sequence

COLUMN	TYPE	DESCRIPTION
`seqrelid`	`oid`NOT NULL	The OID of the pg_class entry for this sequenceReferences:`pg_class.oid`
`seqtypid`	`oid`NOT NULL	Data type of the sequenceReferences:`pg_type.oid`
`seqstart`	`bigint`NOT NULLDocumented as:`int8`	Start value of the sequence
`seqincrement`	`bigint`NOT NULLDocumented as:`int8`	Increment value of the sequence
`seqmax`	`bigint`NOT NULLDocumented as:`int8`	Maximum value of the sequence
`seqmin`	`bigint`NOT NULLDocumented as:`int8`	Minimum value of the sequence
`seqcache`	`bigint`NOT NULLDocumented as:`int8`	Cache size of the sequence
`seqcycle`	`boolean`NOT NULLDocumented as:`bool`	Whether the sequence cycles

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
`seqrelid`	–	–	–	–	–	–	–
`seqtypid`	–	–	–	–	–	–	–
`seqstart`	–	–	–	–	–	–	–
`seqincrement`	–	–	–	–	–	–	–
`seqmax`	–	–	–	–	–	–	–
`seqmin`	–	–	–	–	–	–	–
`seqcache`	–	–	–	–	–	–	–
`seqcycle`	–	–	–	–	–	–	–

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 14 ← 13

Catalog description updated

PostgreSQL 10 ← 9.6Catalog added

+ seqrelid+ seqtypid+ seqstart+ seqincrement+ seqmax+ seqmin+ seqcache+ seqcycle

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FROMTOInclude description updates

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