V$CALLTAG

V$CALLTAG ???.

Column	Datatype	Description
`SESSION_ID`	`NUMBER`	???
`PERFORMANCE_CLASS`	`VARCHAR2(32)`	???
`WORK_REQUEST_CLASS`	`VARCHAR2(32)`	???
`HOP_COUNT`	`NUMBER`	???
`SERVICE_NAME`	`VARCHAR2(64)`	???
`MODULE`	`VARCHAR2(48)`	???
`ACTION`	`VARCHAR2(32)`	???
`USERNAME`	`VARCHAR2(30)`	???
`PROGRAM`	`VARCHAR2(48)`	???