Re: Column order in indices (oracle 9.2)
Using a hint may force to use your index. It may also give an idea if it is really possible to use the provided index. Further, CBO runs on calculated statistics be sure you work on correct statistic. The last but not least is, Oracle may choose the way it use indexes according to table sizes.
On 8/1/06, email@example.com <
I remember reading that in Oracle
9.2 and higher the order of the columns
in an index does not matter.
That is oracle will be able to quickly search on a column even if it is not
a leading one. I have a table
with a primary key consisting of three columns. When a table is queried
based on the third column,
the data start coming out immediately, but when I use the second column the
query just sits there.
Is that an expected behavior? Did I misunderstood something about the
thanks for any insight