Default case specificity for character string comparisons depends on the mode defined for the current session.
| Session Mode | Default for String Comparisons |
|---|---|
| ANSI | CASESPECIFIC |
| Teradata | NOT CASESPECIFIC |
You can add the explicit attribute NOT CASESPECIFIC to the definition of a CHARACTER or VARCHAR field in the USING phrase to override the default.
The purpose of the NOT CASESPECIFIC attribute is to ease the transition to an ANSI session mode of operation. Use the ANSI SQL:2011-compliant UPPER function to perform case blind comparisons.