Field routine: Lookup from master data table

Hi experts

I need a few ABAP codes from your side for a field routine.

SELECT SINGLE

CFM_FLO_TP FROM /BI0/SCFM_FLO_TP

INTO RESULT WHERE
CFM_FLO_TPEQ SOURCE_FIELDS-POSTXT(+1).

The routine above is not finished, I need only value from the second field position up to the first blank of the table below.

How would you adjust this routine?

thanks

Characteristic 0POSTXT: Only from 2nd up to the first blank needed...