Other

Depending on the data distribution, search on optional index column will likely to cause time out. See example -
Select BSEG_ID
From CI_BSEG
Where MASTER_BSEG_ID = &IN.MASTER-BSEG-ID
For such cases, consider additional restrictions or re-create the index to become composite - MASTER_BSEG_ID + BSEG_ID.