51.56. pg_transform
The catalog
pg_transform
stores information about
transforms, which are a mechanism to adapt data types to procedural
languages. See
CREATE TRANSFORM
for more information.
Table 51.56.
pg_transform
Columns
| Name | Type | References | Description |
|---|---|---|---|
trftype
|
oid
|
|
OID of the data type this transform is for |
trflang
|
oid
|
|
OID of the language this transform is for |
trffromsql
|
regproc
|
|
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 this operation is not supported. |
trftosql
|
regproc
|
|
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 this operation is not supported. |