Multiple diagnostic rows for one violations row

In the preceding example, only one row in the diagnostics table corresponds to the new row in the violations table. However, more than one diagnostic row can be added to the diagnostics table when a single new row is added to the violations table. For example, if the ssn value (973824499) that user linda entered in the INSERT statement had been the same as an existing value in the ssn column of the cust_subset target table, only one new row would appear in the violations table, but the following two diagnostic rows would be present in the cust_subset_dia diagnostics table.

informix_tupleid	objtype	objowner	objname
1	C	joe	n104_7
1	I	joe	unq_ssn

Both rows in the diagnostics table correspond to the same row of the violations table because both of these rows have the value 1 in the informix_tupleid column. The first diagnostic row, however, identifies the constraint violation caused by the INSERT statement that user linda issued, while the second diagnostic row identifies the unique-index violation that the same INSERT statement caused. In this second diagnostic row, the value I in the objtype column stands for a unique-index violation, and the value unq_ssn in the objname column gives the name of the index for which the integrity violation was detected.

For more information about how to set database object modes, see the SET Database Object Mode statement in the IBM® Informix® Guide to SQL: Syntax.