DBA_HIST_TOPLEVELCALL_NAME contains a list of top level calls
This information is used in DBA_HIST_ACTIVE_SESS_HISTORY
In Oracle 12.1.0.2 DBA_HIST_TOPLEVELCALL_NAME has the following columns:
| Name | Data Type |
| DBID | NUMBER |
| TOP_LEVEL_CALL# | NUMBER |
| TOP_LEVEL_CALL_NAME | VARCHAR2(64) |
| CON_DBID | NUMBER |
| CON_ID | NUMBER |
The following table summarizes the number of top level calls in various releases:
| Version | # Calls |
| 11.2.0.3 | 151 |
| 12.1.0.2 | 163 |