The STRING statement provides concatenation of the partial
or complete contents of one or more data items into a single data item.
{ identifier-2 }
STRING { { identifier-1 } [ DELIMITED [ BY ] { literal-2 } ] } ...
{ literal-1 } { SIZE }
INTO identifier-3
[ WITH POINTER identifier-4 ]
[ [ ON ] OVERFLOW imperative-statement-1 ]
[ NOT [ ON ] OVERFLOW imperative-statement-2 ]
[ END-STRING ]