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In a stored procedure, is it possible to get the total number or rows updated by different statements?

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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?

Why should this post be closed?

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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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