Release 10.1A: OpenEdge Data Management:
SQL Reference

> ## makeNULL

> Sets the value of an SQL statement’s input parameter to `NULL`. The following Java classes declare `makeNULL`:

> - `SQLIStatement`
> - `SQLPStatement`
> - `SQLCursor`

> Sets a field of the currently active row in a procedure’s result set to `NULL`:

> - `DhSQLResultSet`

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