maxdb_affected_rows

maxdb::affected_rows

Gets the number of affected rows in a previous MaxDB operation

&reftitle.description;

&style.procedural;

`int` `maxdb_affected_rows` `resource` `link`

&style.oop;

`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.

&reftitle.returnvalues;

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.

&reftitle.examples;

### &style.oop;

    <?php
    $maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");

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

    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);

    $result->close();

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

    /* close connection */
    $maxdb->close();
    ?>

### &style.procedural;

    <?php
    $link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");

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

    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));

    maxdb_free_result($result);

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

    /* close connection */
    maxdb_close($link);
    ?>

&example.outputs.similar;

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

&reftitle.seealso;

- `maxdb_num_rows`
- `maxdb_info`