Thanks for your replay.
There is b-tree index on last_name, Partition is actually on a different
column bill_num, which is also used for search. However in this case, it is
the last name search that is slow.
I should also mention that the p_in_lastname input parameter is always
upper, e.g. 'SMITH%'. The search, e,g, 'SMITH%' can return multiple users,
e.g. John Smith, Bill Smith, etc.
Ning
On Wednesday, February 20, 2013 12:56:45 AM UTC-5, Ninja Li wrote:
> Hi,
>
> I would like to ask for some advice on the design of PL/SQL procedure. I
> am trying to improve the performance of a PL/SQL procedure which allows a
> user to do search by their last name and returns their account
> information. I will be joining two tables, customer_info (with last name as
> a column ) and account_details, with 8 million and 50 million rows
> respectively by user ID on each table. The procedure is already in place
> and very straight forward, which goes something like the following:
>
> procedure name_search ( p_in_user_id number, p_in_lastname varchar2 ,,,)
> {
> .......
> open cursor for
> select a.column1, a.column2, b.column1, b.column2, .....
> from customer_info a, account_details b
> where a.user_id = b.user_id
> and a.last_name like p_in_lastname || '%';
> }
>
> The execution time varies from 3 to 15 seconds.
>
> I would like to ask if there are other ways to write the procedure, such
> as using with clause or global temporary tables which can significantly
> improve performance in your experience.
>
> The tables already have partition and indexes on last_names, user_id in
> place.
>
> Thanks in advance.
>
> Nick
>
>
>
>
>
>
>
>
>
>
>
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