Re: search/select case-insensitivly.

On Tue, 2002-10-22 at 17:01, Zhidian Du wrote:
> I want a PHP program to search case-insensitivly.
>
> for example:
> select Name from mytable where Name = '$Name';
>
>
> Here $Name is what users' input maybe JOHN, john. How to let it match John
> in table and find that record?

Although you can simply do as another poster said and use the ILIKE
operator, there are a few things you may want to consider.

You can also do something like:

"SELECT name FROM mytable WHERE lower(name) = '" . strtolower($Name) .
"'; "

This means that PostgreSQL will use an index, if there is an index on
lower(name):

CREATE INDEX lcname ON mytable( lower(name) );

This will give you the most efficient access if you have many records in
'mytable', whereas ILIKE will require a full-table scan.

Regards,
Andrew.
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