This parameter enables tracing of expression substitution. Expression substitution occurs when function based indexes are used.
| Version | Type | Default | Session Modifiable |
System Modifiable |
| 8.1.5 | Boolean | FALSE | Yes | No |
| 8.1.6 | Boolean | FALSE | Yes | No |
| 8.1.7 | Boolean | FALSE | Yes | No |
| 9.0.1 | Boolean | FALSE | Yes | No |
| 9.2.0 | Boolean | FALSE | Yes | No |