Look in the Sqlite source for examples. Your function gets the
arguments you specify in the SQL and then your program does whatever you
like with them and returns a result. It could for example perform a
regular expression compare etc.
You register the function with Sqlite when you open a connection.
You can compile extra functions into Sqlite if you choose so that you do
not have to load custom functions when you open a DB connection.
RaghavendraK 70574 wrote:
Thats great.
If possible Can u please provide a sample,
Will this function receive the database column values or indexes?
regards
ragha
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----- Original Message -----
From: Igor Tandetnik <[EMAIL PROTECTED]>
Date: Wednesday, September 5, 2007 6:20 pm
Subject: [sqlite] Re: Re: Merging two tables
RaghavendraK 70574
<[EMAIL PROTECTED]> wrote:
How to plug custom search algorthim within Sqlite?
For example,
select * from table where a = 'xxx';
Instead of using normal inbuilt search can it be userDefined
function?
Yes. You can use sqlite3_create_function to create a function
taking two
parameters and returning a boolean (actually, an integer with the
values
0 or 1). Then you can say
select * from table where MyComparison(a, 'xxx');
Igor Tandetnik
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