Welcome to Software Development on Codidact!
Will you help us build our independent community of developers helping developers? We're small and trying to grow. We welcome questions about all aspects of software development, from design to code to QA and more. Got questions? Got answers? Got code you'd like someone to review? Please join us.
In a stored procedure, is it possible to get the total number or rows updated by different statements?
I have a bunch of stored procedures that look like something this
CREATE PROCEDURE example()
BEGIN
UPDATE STATEMENT A;
UPDATE STATEMENT B;
UPDATE STATEMENT C;
END//
When I run them through MySQLWorkbench after it completes they will return a response of,
5 row(s) affected
However that is only the count for the rows updated by the last statement, not all of the rows effected by the stored procedure.
Is there a way to write the stored procedure so that the number of rows effected will be the total number of rows instead of just the last update?
2 answers
This is possible in SQL Server using the built-in @@ROWCOUNT variable. Something like this
DECLARE @rows INT = 0;
-- INSERT ...
SET @rows = @rows + @@ROWCOUNT;
-- UPDATE ...
SET @rows = @rows + @@ROWCOUNT;
-- DELETE ...
SET @rows = @rows + @@ROWCOUNT;
-- SELECT ...
SET @rows = @rows + @@ROWCOUNT;
SELECT @rows AS Rows
MySQL has the FOUND_ROWS() function, but it only works on SELECTs.
0 comment threads
One rather complicated way to get what you want (may be extended to multiple calls of statements and/or procedures) is through usage of MySQL Row-Based Binary Logs as explained here.
This allows for MYSQL to generate logs with affected rows that will be output like:
[Transaction total : 10 Insert(s) : 5 Update(s) : 4 Delete(s) : 1]
Applying ShowMeBilly's solution to MySQL you can accumulate rows affected by using mysql_affected_rows().
0 comment threads
0 comment threads