In 4D v11 SQL it is possible to pass a pointer variable inside an SQL Query. The pointer variable should be passed without a dereference.

For Example:

C_TEXT($vName;$vresult) C_POINTER($name_p) $vName:="John" $name_p:=->$vName Begin SQL   SELECT names   FROM test   WHERE names=:$name_p   INTO :$vresult End SQL

In this example, at the end the value of $vresult will be John. The SQL engine will not allow you to use a pointer-to-pointer reference in SQL queries.