Inner Join of 3 tables is correct or not?

Question

Hi Guys ,
             I have a requirement where i have to join 3 tables i  dont know whether the inner Join which i wrote for 3 tables is correct or not.I am not getting any Syntax error but whether the logci below which i wrote gets all the records or not.
The Requirement is
"c.     Select the BOL Number entered in the screen and query the table LIKP with the BOL number in the field LIKP-BOLNR.  Gather the list of ALL delivery documents (LIKP-VBELN) that is outputted.
d.     Query the list of the delivery documents obtained into the table VBFA in the field VBFA- VBELV.  From the output that is displayed, select the Follow-On Document Field (VBFA-VBELN) for that item whose Subsequent Document Category (VBFA- VBTYP_N) is R and the Movement Type (VBFA- BWART) is 641.  Get the Follow-On document number for each of the above Delivery Document number.
e.     Query the table EKBE with the Follow On document obtained above in the field Material Document (EKBE- BELNR).  Perform this activity for each of the follow on document obtained above.  Get the resultant Purchase Order (EKBE-EBELN) and Item Number (EKBE-EBELP) from the query.  After querying will all the Follow-On Documents, get the unique list of PO number and Item Number.
The logic which i wrote is
                Begin of t_PoolSTO_out,
              BOLNR type LIKP-BOLNR,
              EBELN type EKBE-EBELN,
              EBELP type EKBE-EBELP,
              VBELN type LIKP-VBELN,
              VBELNV type VBFA-VBELN,
         End of t_PoolSTO_out.
      Data: i_PoolSTO type Standard table of t_PoolSTO_out.
  Select
        a~BOLNR
        c~EBELN
        c~EBELP
        a~VBELN
        b~VBELN
        from LIKP as a
        Inner Join VBFA as b on aVBELN = bVBELV
        Inner Join EKBE as c on bVBELN = cBELNR
        into Table i_PoolSTO
        Where a~BOLNR in S_LBLNE and
              b~VBTYP_N = 'R' and
              b~BWART = '641'.
          My doubt is whether the logic works or not i Mean does i getall the rrecords based on the requirement.?
                  If not please tell any alternative logic?
Thanks,
Gopi Anne.

Answer 1

Hi Gopi,
Your code is Good.
But try to avoid Inner join with more number of Tables ...because this is a performance issue..
try to use..
select (primary key fields mainly,other fields) from LIKP into itab where bolnr in p_bolnr(paramater).
next try to use for all entries option..
select (primary key fields mainly,other fields) from VBFA for all entries in itab where (give the condition)....
simillarly do for the other select ....ok this will try to reduce the performance issue....
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Message was edited by:
        Alvaro Tejada Galindo