12.15. OLD
Record with the initial values of a row before update or delete
Available inPSQL — triggers only,
DSQL — RETURNING clause of UPDATE, UPDATE OR INSERT and MERGE
TypeRecord type
Syntax
|OLD.column_name
Table 12.6.
OLD Parameters| Parameter | Description |
|---|---|
column_name | Column name to access |
OLD contains the existing version of a database record just before a deletion or update.
The OLD record is read-only.
In multi-action triggers OLD is always available.
However, if the trigger is fired by an INSERT, there is obviously no pre-existing version of the record.
In that situation, reading from OLD will always return NULL.