Question

I have a stored procedure that I would like to pass a string to, to be evaluated in the query.
I will be building a string in php, based on query parameters that exist.
So, my string might be col1 = val1 or col1 = val1 AND col2 = val2 AND col3 = val3, ect.
Then in my stored procedure, I would do something like this:
SET @s = CONCAT('SELECT * from tablename WHERE ' , string);
PREPARE stmt FROM @s;
EXECUTE stmt;
I have tried some different ways of doing this, with no success.
Is this possible?
Thanks.

Answer 1

Your code it valid, you might have an error though.
Try debugging it by replacing
PREPARE stmt FROM @s; EXECUTE stmt;

with

SELECT @s;

then make sure the output is valid by running it, its possible your building @s incorrectly.