Using the ('dbspace', tblspace_num) Option

The 'dbspace' option returns a character string that contains the name of the dbspace that corresponds to a tblspace number. You must supply an additional parameter, either tblspace_num or an expression that evaluates to tblspace_num. The following example uses the 'dbspace' option. First, it queries the systables system catalog table to determine the tblspace_num for the table customer, then it executes the function to determine the dbspace name.
SELECT tabname, partnum FROM systables
   where tabname = 'customer';
If the query returns a partition number of 1048892, you insert that value into the second argument to find which dbspace contains the customer table, as the following example shows:
SELECT DBINFO ('dbspace', 1048892) FROM systables
   where tabname = 'customer';

If the table for which you want to know the dbspace name is fragmented, you must query the sysfragments system catalog table to find out the tblspace number of each table fragment. Then you must supply each tblspace number in a separate DBINFO query to find out all the dbspaces across which a table is fragmented.