Hello,
For trnsformation it stored in multiple tables
If you know CODEID go to table RSTRAN and search
Start Routine : RSTRAN-STARTROUTINE = RSAABAP-CODEID
End Routine: RSTRAN-ENDROUTINE = RSAABAP-CODEID
At field level Routine use table RSTRANROUTMAP
RSAABAP-CODEID = RSTRANROUTMAP-CODEID
| RSTRANROUTMAP |
This is how we used to find the Tables used in transformation. hope this helps!!
Kesava