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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
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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.
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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().
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