PHPKonf: Istanbul PHP Conference 2017



(PECL maxdb >= 1.0)

maxdb_affected_rows -- maxdb::affected_rowsGets the number of affected rows in a previous MaxDB operation


Procedural style

int maxdb_affected_rows ( resource $link )

Object oriented style

int $maxdb->affected_rows;

maxdb_affected_rows() returns the number of rows affected by the last INSERT, UPDATE, or DELETE query associated with the provided link parameter. If this number cannot be determined, this function will return -1.


For SELECT statements maxdb_affected_rows() works like maxdb_num_rows().

The maxdb_affected_rows() function only works with queries which modify a table. In order to return the number of rows from a SELECT query, use the maxdb_num_rows() function instead.

Return Values

An integer greater than zero indicates the number of rows affected or retrieved. Zero indicates that no records where updated for an UPDATE statement, no rows matched the WHERE clause in the query or that no query has yet been executed. -1 indicates that the number of rows affected can not be determined.


Example #1 Object oriented style

= new maxdb("localhost""MONA""RED""DEMODB");

/* check connection */
if (maxdb_connect_errno()) {
printf("Connect failed: %s\n"maxdb_connect_error());

maxdb_report (MAXDB_REPORT_OFF);
$maxdb->query("DROP TABLE mycustomer");
maxdb_report (MAXDB_REPORT_ERROR);

/* Insert rows */
$maxdb->query("CREATE TABLE mycustomer AS SELECT * from hotel.customer");
printf("Affected rows (INSERT): %d\n"$maxdb->affected_rows);

$maxdb->query("ALTER TABLE mycustomer ADD Status int default 0");

/* update rows */
$maxdb->query("UPDATE mycustomer SET Status=1 WHERE cno > 50");
printf("Affected rows (UPDATE): %d\n"$maxdb->affected_rows);

/* delete rows */
$maxdb->query("DELETE FROM mycustomer WHERE cno < 50");
printf("Affected rows (DELETE): %d\n"$maxdb->affected_rows);

/* select all rows */
$result $maxdb->query("SELECT title FROM mycustomer");
printf("Affected rows (SELECT): %d\n"$maxdb->affected_rows);


/* Delete table Language */
$maxdb->query("DROP TABLE mycustomer");

/* close connection */

Example #2 Procedural style


if (!
$link) {
printf("Can't connect to localhost. Error: %s\n"maxdb_connect_error());

maxdb_report (MAXDB_REPORT_OFF);
maxdb_query($link,"DROP TABLE mycustomer");
maxdb_report (MAXDB_REPORT_ERROR);

/* Insert rows */
maxdb_query($link"CREATE TABLE mycustomer AS SELECT * from hotel.customer");
printf("Affected rows (INSERT): %d\n"maxdb_affected_rows($link));

maxdb_query($link"ALTER TABLE mycustomer ADD Status int default 0");

/* update rows */
maxdb_query($link"UPDATE mycustomer SET Status=1 WHERE cno > 50");
printf("Affected rows (UPDATE): %d\n"maxdb_affected_rows($link));

/* delete rows */
maxdb_query($link"DELETE FROM mycustomer WHERE cno < 50");
printf("Affected rows (DELETE): %d\n"maxdb_affected_rows($link));

/* select all rows */
$result maxdb_query($link"SELECT title FROM mycustomer");
printf("Affected rows (SELECT): %d\n"maxdb_affected_rows($link));


/* Delete table Language */
maxdb_query($link"DROP TABLE mycustomer");

/* close connection */

The above example will output something similar to:

Affected rows (INSERT): 15
Affected rows (UPDATE): 15
Affected rows (DELETE): 0
Affected rows (SELECT): 15

See Also

add a note add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top