1mysql_stmt_affected_rows(3)   MariaDB Connector/C  mysql_stmt_affected_rows(3)
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5   Name
6       mysql_stmt_affected_rows  -  Returns  the  number of affected rows from
7       previous executed prepared statement
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9   Synopsis
10              #include <mysql.h>
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12              my_ulonglong mysql_stmt_affected_rows(MYSQL_STMT * stmt);
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14   Description
15       Returns the number of affected rows by the last prepared statement  as‐
16       sociated  with mysql, if the operation was an “upsert” (INSERT, UPDATE,
17       DELETE or REPLACE) statement, or -1  if  the  last  prepared  statement
18       failed.
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20   Parameter
21       • stmt  -  a  statement  handle,  which  was  previously  allocated  by
22         [mysql_stmt_init()](mysql_stmt_init().]]
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24   Notes
25       • When using UPDATE, MariaDB will not update columns where the new val‐
26         ue  is  the same as the old value.  This creates the possibility that
27         mysql_stmt_affected_rows() may not actually equal the number of  rows
28         matched,  only the number of rows that were literally affected by the
29         query.
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31       • The REPLACE statement first deletes the record with the same  primary
32         key  and then inserts the new record.  This function returns the num‐
33         ber of deleted records in addition to the number of inserted records.
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35   See Also
36       • mysql_stmt_insert_id(3)
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40Version 3.2.2                                      mysql_stmt_affected_rows(3)
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