Catching Exceptions updating z tables.

Question

Hello there, I´m trying to update a z-table , but I´m not sure if the way i´m working is the best , First I do a Select in order to check if the register exists ant then I make an update , but where I can catch any exception.???
SELECT * FROM zpx_ci_docs_proc
        INTO  TABLE ti_zpx_ci_docs
        WHERE nume_docu = num_doc.
  If sy-subrc = 0.
    update zpx_ci_docs_proc set DATA_ENVI = dat_envi       WHERE nume_docu = num_doc.
    if sy-subrc = 0.
       MESSAGE s000(zpb) WITH
       " register update''
    endif.
Thanks again.

Answer 1

Hi,
Use enqueue FM before updating the table and After updation use dequeue FM.
DO.
Use ENQUEUE_E_TABLE FM
IF sy-subrc = 0.
EXIT.
ENDIF.
ENDDO.
UPDATE statement.
IF sy-subrc = 0.
Use DEQUEUE_E_TABLE FM
ELSE.
Error Handling.
ENDIF.
Do enddo is used to ensure that there are no locks apart from yours on the table before you update it.
Thanks,
Kartavya