Get the number of affected rows in a MySQL update statement?

I have stored procedure in MySQL, something lik开发者_Python百科e the below:

create procedure SP_Test (input1 varchar(20))
begin
update Table1 set Val1='Val' where country=input1;
//I want to see if this update changed how many rows and 
//do some specific action based on this number
....
end

How can I determine how many rows were changed by this update?

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Use ROW_COUNT():

SELECT ROW_COUNT();

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one way, not very optimal is to simply do a select before you do the update.

select count(*) from table1 where country = 'country1'

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Try the following code:

int mysql_affected_rows ([ resource $link_identifier = NULL ] )