Hello Experts,
Continuing from the below discussion :
SQLscript procedure - Avoid materialisation of Internal tables
and thanks to valuable inputs form Lars Breddemann I was able to zero in on the problem area.
What I learnt in the process(screenshot from planviz attached ) is that two statements take up 99% of time.
I have pasted the two statements below for reference ( I tried my best to better format sql statements for readability as it is not always the best approach to copy past sql statements 
)
Also, these two statements form the heart of the functional logic.
This is part of a Revenue allocation code, where revenues ( or costs ) is allocated from a sender to a receiver -
based on characteristics from sender and receiver. (join condition ).
Distribution base is used to create the multiplying factor,
and allocation is done using - S."AMT" * (R."DIST_BASE" / D."DIST_BASE" ) - ( a keyfigure in Receiver is defined as receiver_distbase )
I'm not a functional expert in this topic, and sharing what I understood from functional expert.
Not going too much into functional topic,
Wanted to understand what is wrong with the below sqls.
I could already see that case statement is a row operation and will slow down the prcess drastically.
also "IN" in join condition which is also a performance glitch.
I understood from functional expert that this is necessary .
these two statements take around 20 seconds each which i feel is a lot considering data volume.
Any pointers on how I should proceed.??
Thanks in advance.
Best Regards,
Vinay
lt_sender2 - 65 rows.
lt_distbase - 65 rows
lt_receiver - 136535 rows.
lt_distbase = SELECT ROW_NUMBER( ) OVER ( ) AS "FS_PER_D_ROW_", 1 AS "FS_PER_DUMMY_", S."YEAR_MM", S."DEPT_CD", S."DEPT_GRP", S."UPPER_DEPT_GRP",
CASE
WHEN SUM( IFNULL( R."DIST_BASE", 0 ) ) = 0 THEN TO_DOUBLE(1)
ELSE SUM( R."DIST_BASE" )
END
AS "DIST_BASE"
FROM
:lt_sender2 AS S
LEFT OUTER JOIN :lt_receiver AS R
ON ( S."FS_PER_DUMMY_" = R."FS_PER_DUMMY_" ) AND
( S."YEAR_MM" IN ( R."YEAR_MM", R."FS_PER_YEAR_MM" )) AND
( S."DEPT_CD" IN ( R."DEPT_CD", R."FS_PER_DEPT_CD" )) AND
( S."DEPT_GRP" IN ( R."DEPT_GRP", R."FS_PER_DEPT_GRP" )) AND
( S."UPPER_DEPT_GRP" IN ( R."UPPER_DEPT_GRP", R."FS_PER_UPPER_DEPT_GRP" ))
GROUP BY S."YEAR_MM", S."DEPT_CD", S."DEPT_GRP", S."UPPER_DEPT_GRP";
lt_allocation = SELECT S."FS_PER_S_ROW_", S."FS_PER_DUMMY_", IFNULL(R."FS_PER_R_ROW_", 0) AS "FS_PER_R_ROW_",
IFNULL( D."FS_PER_D_ROW_", 0) AS "FS_PER_D_ROW_", IFNULL( R."YEAR_MM", S."YEAR_MM" ) AS "YEAR_MM",
IFNULL( R."PLCY_NO", TO_NVARCHAR('') ) AS "PLCY_NO", IFNULL( R."CLERK_NO", TO_NVARCHAR('') ) AS "CLERK_NO",
IFNULL( R."DIST_TYPE", TO_NVARCHAR('') ) AS "DIST_TYPE", IFNULL( R."COST_CENTER", TO_NVARCHAR('') ) AS "COST_CENTER",
IFNULL( R."DEPT_CD", S."DEPT_CD" ) AS "DEPT_CD", IFNULL( R."OBJ_TYP", TO_NVARCHAR('') ) AS "OBJ_TYP",
IFNULL( R."OBJ_SEQ", TO_NVARCHAR('') ) AS "OBJ_SEQ", IFNULL( R."PROD_CD", TO_NVARCHAR('') ) AS "PROD_CD",
IFNULL( R."PROD_GRP", TO_NVARCHAR('') ) AS "PROD_GRP", IFNULL( R."MANDT", TO_NVARCHAR('') ) AS "MANDT",
IFNULL( R."DEPT_GRP", S."DEPT_GRP" ) AS "DEPT_GRP", IFNULL( R."UPPER_DEPT_GRP", S."UPPER_DEPT_GRP" ) AS "UPPER_DEPT_GRP", IFNULL( ( S."AMT" * 100 / 100 * R."DIST_BASE" / D."DIST_BASE" ) , S."AMT" ) AS "AMT"
FROM
:lt_sender2 AS S
LEFT OUTER JOIN :lt_receiver AS R
ON ( S."FS_PER_DUMMY_" = R."FS_PER_DUMMY_" ) AND
( S."YEAR_MM" IN ( R."YEAR_MM", R."FS_PER_YEAR_MM" )) AND
( S."DEPT_CD" IN ( R."DEPT_CD", R."FS_PER_DEPT_CD" )) AND
( S."DEPT_GRP" IN ( R."DEPT_GRP", R."FS_PER_DEPT_GRP" )) AND
( S."UPPER_DEPT_GRP" IN ( R."UPPER_DEPT_GRP", R."FS_PER_UPPER_DEPT_GRP" ))
LEFT OUTER JOIN :lt_distbase AS D
ON ( S."FS_PER_DUMMY_" = D."FS_PER_DUMMY_" )
AND ( S."YEAR_MM" = D."YEAR_MM" )
AND ( S."DEPT_CD" = D."DEPT_CD" ) AND
( S."DEPT_GRP" = D."DEPT_GRP" ) AND
( S."UPPER_DEPT_GRP" = D."UPPER_DEPT_GRP" );