DSXchange

Hello,

I have a requirement to implement the following logic.

if column A from table A is like '%columnB%' from table B return target value from B

Here A is the primary table, B is the reference / lookup table.
This means that if column A from table A has the value 'AMBC' and column B from table B has some value 'MB', it matches and an output record is returned.

Table B is having some 20 total records.
Could you help me with implementing this logic in Datastage?

Use instr sql function........ in source query

Thanks for the reply. But I solved it another way.
I inserted the values in table B by enclosing the column B values within the wildcard characters '%' . For example, instead of inserting 'MB', I inserted '%MB%' and then wrote the following SQL Query

Select * from A, B where A.A like B.B

I guess this is more of a SQL solution than Datastage but this is what worked.

Yes, its always advisable to play in query, if you can, rather than implementing it in Datastage.

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in_finity307 wrote:Thanks for the reply. But I solved it another way.
I inserted the values in table B by enclosing the column B values within the wildcard characters '%' . For example, instead of inserting 'MB', I inserted '%MB%' and then wrote the following SQL Query

Select * from A, B where A.A like B.B

I guess this is more of a SQL solution than Datastage but this is what worked.

Does that mean that you have used sparse lookup instead of normal lookup ? please advice because i have the same issue and i cant use sparse lookup because the base is huge and the lookup table doesn't has indexes , also the lookup table is teradata table which isn't support sparse lookups

i'm waiting your feedback

Check the INDEX function in DataStage

kbsuryadev wrote:Check the INDEX function in DataStage

how to use index function within lookup stage , in order to lookup a portion of a string ? kindly illustrate

No, I haven't used a sparse lookup. I have included the lookup condition in the SQL Query itself. I haven't used a lookup stage in Datastage.

Check out the query I have posted earlier.

source>>>>>>trn( in transformer UPCASE(INDEX(Inputcolumn,'string',1))<>0 Then _________ else ______________ ) and then do a look up on the source row.

use upcase depending on your requirement.