manoj.gurnani,
hI, It seems that you do not need this clause:
and y.col_1 = z.col_1
and y.col_2 = z.col_2
right?
Is your table z rather small? If your table have different size or your
optimizer mode is different, oracle will show different plan. It is not necessary that
index scan is better than fts.It depends . Test the result and see it:)
Regards
zhu chao
msn:[EMAIL PROTECTED]
www.happyit.net
www.cnoug.org(China Oracle User Group)
======= 2003-01-06 09:39:00 ,you wrote��=======
I've 3 tables table x,y,z
pk of x is (col_1,col_2),pk of y is (col_1,col_2,col_4,col_5),pk of z is
(col_1,col_2)
where clause is :
where x.col_1 = y.col_1
and x.col_2 = y.col_2
and x.col_1 = z.col_1
and x.col_2 = z.col_2
and y.col_1 = z.col_1
and y.col_2 = z.col_2
and x.col_3 in ('val1','val2','val3')
and.....
.
Explain plan shows that there is a FTS of table z .
what can be the reason for this and how to prevent this.
Thanks
Manoj
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