The DML Array feature improves application performance by allowing iterative requests to be grouped together into a single step, resulting in a decrease of the step-processing overhead per request. Only single INSERT statements and references to arrays of variables are supported. References to arrays of structures are not supported.
To accommodate this feature, the EXEC SQL statement is modified to:
EXEC SQL FOR (<countval) <sql statement string>;
FORindicates that this is an array statement
Note: Ensure that <countval> does not exceed the smallest defined dimension in the list of arrays. An error is generated if this condition is violated and countval is specified as a literal. At precompile time, no check is made when countval is specified as a variable.
Literal integer constants that are embedded in the SQL string are not iterated; they are propagated in every inserted row.
The same host variable can be specified for two or more fields. Any given iteration will obtain the same value.
05 EMPNUM PIC S9(8) DISPLAY OCCURS 6 TIMES.
05 MGRNUM PIC S9(8) COMP OCCURS 6 TIMES.
PREPARE INSSTMT FROM :STMT-STRING
EXEC SQL FOR 6
EXECUTE INSSTMT USING :EMPNUM, :MGRNUM