maxdb_affected_rows (PECL)
maxdb_affected_rows
(no version information, might be only in CVS)
maxdb->affected_rows -- Gets the number of affected rows in a previous MaxDB operation
Description Procedural style:
int
maxdb_affected_rows ( resource link )
Object oriented style (property):
class
maxdb {
int 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.
Notatka:
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()
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 Przykład 1. Object oriented style
<?php = 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 ); $result -> close (); /* Delete table Language */ $maxdb -> query ( "DROP TABLE mycustomer" ); /* close connection */ $maxdb -> close (); ?>
Przykład 2. Procedural style
<?php = maxdb_connect ( "localhost" , "MONA" , "RED" , "DEMODB" ); $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 )); maxdb_free_result ( $result ); /* Delete table Language */ maxdb_query ( $link , "DROP TABLE mycustomer" ); /* close connection */ maxdb_close ( $link ); ?>
The above examples would produce the following output:
Affected rows (INSERT): 15
Affected rows (UPDATE): 15
Affected rows (DELETE): 0
Affected rows (SELECT): 15
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