In the updateCatalog function, retrieve the form field values and create an SQL statement to add a row to database table Catalog.

While Wikipedia is not usually billed as a catalog, my description should make it clear that it does in fact serve that function, and in a concept-oriented way.

Using this table function instead of db2pd simplifies evaluation of the results because the index IDs (IIDs) can be converted to index names by joining with the SYSCAT.INDEXES catalog view.