PostgreSQL 12 ← 11
← Catalog atlas / pg_amproc
SYSTEM CATALOG · System catalog
pg_amproc
The catalog pg_amproc stores information about support functions associated with access method operator families. There is one row for each support function belonging to an operator family.
Checked column by column against a PostgreSQL 18.6 instance · Raw measurement record ↗
Columns PostgreSQL 18
pg_amprocPostgreSQL 19 beta 3 is a preview snapshot; the structure can still change before release.
| COLUMN | TYPE | DESCRIPTION |
|---|---|---|
oid |
oidNOT NULL |
Row identifier |
amprocfamily |
oidNOT NULL |
The operator family this entry is forReferences:pg_opfamily.oid |
amproclefttype |
oidNOT NULL |
Left-hand input data type of associated operatorReferences:pg_type.oid |
amprocrighttype |
oidNOT NULL |
Right-hand input data type of associated operatorReferences:pg_type.oid |
amprocnum |
smallintNOT NULLDocumented as:int2 |
Support function number |
amproc |
regprocNOT NULL |
OID of the functionReferences: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 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 |
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amprocfamily |
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amproclefttype |
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amprocrighttype |
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amprocnum |
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amproc |
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 11 ← 10
PostgreSQL 9.3 ← 9.2
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.