sql - Force Index Not Working on Delete -

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i trying use forced index on delete statement in sybase, query plan not seems pick index, showing table scan.

what right way force index on delete?

snippet of query using:

set forceplan on  delete  #table1  #table2 tmp, #table1 t (index idx1)     tmp.col1 = t.col1 ,     tmp.col2 = t.col2

the index idx1 created on col1 , col2 on #table1 larger table.

is there wrong in query? using sybase ase 12.5


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