11.15. OLD
Available inPSQL, triggers only
TypeRecord type
Syntax
|OLD.column_name
Table 11.6.
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.
Starting with Firebird 2.0 it is read-only.
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Note
In multi-action triggers — introduced in Firebird 1.5 — 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;
writing to it will cause a runtime exception.