System Catalogs / System catalogs
pg_transform
Read the PG 18 manualThe catalog pg_transform stores information about transforms, which are a mechanism to adapt data types to procedural languages.
Reading PG 18current·documented in 13 of 24 versions, 9.5 to 20
- Kind
- System catalogs
- Columns in this snapshot
- 5
- Definition source
- English manual
- Metadata snapshot
- 18.6
Columns 5
As listed in the PostgreSQL 18 manual.
| Column | Type | Description / reference |
|---|---|---|
oid | oidNOT NULL | Row identifier |
trftype | oidNOT NULL | OID of the data type this transform is for pg_type.oid |
trflang | oidNOT NULL | OID of the language this transform is for pg_language.oid |
trffromsql | regprocNOT NULL | The OID of the function to use when converting the data type for input to the procedural language (e.g., function parameters). Zero is stored if the default behavior should be used. pg_proc.oid |
trftosql | regprocNOT NULL | The OID of the function to use when converting output from the procedural language (e.g., return values) to the data type. Zero is stored if the default behavior should be used. pg_proc.oid |
Column history across versions
Definition snapshot: english-manuals:8bc748ae27ad9c90237eacc09d8… · English manual source