17.16. The operator of the positional modification of the cursor associated with a dynamically prepared sample operator

  <dynamic update statement: positioned> :: =
    UPDATE <table name>
    SET <set clause> [{<comma> <set clause>} ...]
    WHERE CURRENT OF <dynamic cursor name> 

Comment:

In fact, a positional modification operator on a cursor associated with a dynamically prepared SQL statement differs from a static case only in that the cursor name can be specified through a variable.