Re: Best method for search

Charles,

The OP did not write FASTEST he wrote BEST, but did not define what he
considered best. In my way of thinking, unless the code will be
executed thousands of times, fastest is not best. A readable and
single statement might be better than fast in most cases.

Jim

On Thu, Feb 5, 2009 at 10:34 AM, Charles Wilt <charles.wilt@xxxxxxxxx> wrote:

Elvis,

I'm not sure that counts as "faster than 3 chains from RPG". Given
that the use of REPLACE on the federalIDColumn would cause a full
table scan correct? (Unless you are running v6r1 perhaps?)

Dean,

Given that you're only dealing with a max of 3 records, I doubt any
SQL method is going to be faster.

Charles

On Thu, Feb 5, 2009 at 11:55 AM, Elvis Budimlic
<ebudimlic@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

SELECT * FROM myFile WHERE REPLACE(FederalIdColumn,'-','') = '999999999'

Hth, Elvis

Celebrating 11-Years of SQL Performance Excellence on IBM i, i5/OS and
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-----Original Message-----
Subject: Best method for search

Hi,

I'm trying to determine the best way to find data in a field. Either RPG
or SQL. First some background. We have a field called Federal ID number
that contains multiple types of numbers. There is an associated field
called Federal ID type which identifies what kind of ID number it is. The
possible values are Canadian SIN (999-999-999), Employer ID (99-9999999),
SSN (999-99-9999) and Medicare # which has the same format as SSN. The
Federal ID number field is alphanumeric and it contains the dashes. We
have a logical file defined with Federal ID number as the key.

Now my question. Given a 9 digit number what is the best/fastest way to
find the record that matches? One option is to use RPG and format the
number 3 different ways and chain to the file 3 times. Would SQL provide
a better solution performance wise? I guess another option would be to
store the Federal ID number without the dashes in a seperate field. I'm
trying to avoid that if possible. TIA

Dean Eshleman,
MMA, Inc.



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