The SQL Communications Area (SQLCA) is a collection of variables
 SQL uses to provide information about the execution of SQL
 statements to application programs.  The SQLCA shows whether a
 statement was successful, and for some errors, the particular
 error when a statement is not successful.

 To illustrate how the SQLCA works in applications, interactive
 SQL displays its contents when you issue the SHOW SQLCA
 statement.  See the appendix on the SQLCA in the Reference
 Manual for more information.