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mysql_stmt_affected_rows(3) MariaDB Connector/C mysql_stmt_affected_rows(3)
Name
mysql_stmt_affected_rows - Returns the number of affected rows from
previous executed prepared statement
Synopsis
#include <mysql.h>
my_ulonglong mysql_stmt_affected_rows(MYSQL_STMT * stmt);
Description
Returns the number of affected rows by the last prepared statement
associated with mysql, if the operation was an "upsert" (INSERT,
UPDATE, DELETE or REPLACE) statement, or -1 if the last prepared
statement failed.
Parameter
o stmt - a statement handle, which was previously allocated by
[mysql_stmt_init()](mysql_stmt_init().]]
Notes
o When using UPDATE, MariaDB will not update columns where the new
value is the same as the old value. This creates the possibility
that mysql_stmt_affected_rows() may not actually equal the number of
rows matched, only the number of rows that were literally affected by
the query.
o The REPLACE statement first deletes the record with the same primary
key and then inserts the new record. This function returns the
number of deleted records in addition to the number of inserted
records.
See Also
o mysql_stmt_insert_id(3)
Version 3.3.1 mysql_stmt_affected_rows(3)