The DATAPARTITIONNUM function returns the data partition number of a row. If the argument identifies a non-partitioned table, the value 0 is returned. For more information about data partitions, see the DB2(R) Multisystem book.
In SQL naming, the table name may be qualified. In system naming, the table name cannot be qualified.
If the argument identifies a view, common table expression, or derived table, the function returns the data partition number of its base table. If the argument identifies a view, common table expression, or derived table derived from more than one base table, the function returns the data partition number of the first table in the outer subselect of the view, common table expression, or derived table.
The argument must not identify a view, common table expression, or derived table whose outer subselect includes an aggregate function, a GROUP BY clause, a HAVING clause, a UNION clause, an INTERSECT clause, or DISTINCT clause. If the subselect contains a GROUP BY or HAVING clause, the DATAPARTITIONNUM function can only be specified in the WHERE clause or as an operand of an aggregate function. If the argument is a correlation name, the correlation name must not identify a correlated reference.
The data type of the result is a large integer. The result can be null.
SELECT DATAPARTITIONNUM(EMPLOYEE), LASTNAME FROM EMPLOYEE
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