PostgreSQL 17 ← 16
← Catalog atlas / pg_extension
SYSTEM CATALOG · System catalog
pg_extension
The catalog pg_extension stores information about the installed extensions. See Section 36.17 for details about extensions.
Checked column by column against a PostgreSQL 18.6 instance · Raw measurement record ↗
Columns PostgreSQL 18
pg_extensionPostgreSQL 19 beta 3 is a preview snapshot; the structure can still change before release.
| COLUMN | TYPE | DESCRIPTION |
|---|---|---|
oid |
oidNOT NULL |
Row identifier |
extname |
nameNOT NULL |
Name of the extension |
extowner |
oidNOT NULL |
Owner of the extensionReferences:pg_authid.oid |
extnamespace |
oidNOT NULL |
Schema containing the extension's exported objectsReferences:pg_namespace.oid |
extrelocatable |
booleanNOT NULLDocumented as:bool |
True if extension can be relocated to another schema |
extversion |
textNOT NULL |
Version name for the extension |
extconfig |
oid[] |
Array of regclass OIDs for the extension's configuration table(s), or NULL if noneReferences:pg_class.oid |
extcondition |
text[] |
Array of WHERE-clause filter conditions for the extension's configuration table(s), or NULL if none |
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 typePresentAdded / 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 |
– | ||||||||||||||||
extname |
– | ||||||||||||||||
extowner |
– | ||||||||||||||||
extnamespace |
– | ||||||||||||||||
extrelocatable |
– | ||||||||||||||||
extversion |
– | ||||||||||||||||
extconfig |
– | ||||||||||||||||
extcondition |
– |
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 majorsPostgreSQL 14 ← 13
PostgreSQL 12 ← 11
PostgreSQL 11 ← 10
PostgreSQL 10 ← 9.6
PostgreSQL 9.6 ← 9.5
PostgreSQL 9.5 ← 9.4
PostgreSQL 9.3 ← 9.2
PostgreSQL 9.1 ← 9.0Catalog added
Compare any two versions
Pick two versions to see added, removed, and retyped columns. The interactive comparison needs JavaScript; the evolution timeline reads fine without it.