maxdb_stmt_result_metadata (PECL)
maxdb_stmt_result_metadata -- Returns result set metadata from a prepared statement
Description Procedural style:
resource
maxdb_stmt_result_metadata ( resource stmt )
Object oriented style (method):
class
stmt {
resource
result_metadata ( void )
}
If a statement passed to maxdb_prepare() maxdb_stmt_result_metadata() returns the result resource
that can be used to process the meta information such as total number of fields
and individual field information.
Notatka: This result set pointer can be passed as an argument to any of the
field-based functions that process result set metadata, such as:
The result set structure should be freed when you are done with it,
which you can do by passing it to maxdb_free_result()
Notatka:
The result set returned by maxdb_stmt_result_metadata() contains only
metadata. It does not contain any row results. The rows are obtained by using the
statement handle with maxdb_fetch()
Zwracane wartości
maxdb_stmt_result_metadata() returns a result resource or FALSE
Example
Przykład 1. Object oriented style
<?php = new maxdb ( "localhost" , "MONA" , "RED" , "DEMODB" ); $maxdb -> query ( "CREATE TABLE temp.friends (id int, name varchar(20))" ); $maxdb -> query ( "INSERT INTO temp.friends VALUES (1,'Hartmut')" ); $maxdb -> query ( "INSERT INTO temp.friends VALUES (2, 'Ulf')" ); $stmt = $maxdb -> prepare ( "SELECT id, name FROM temp.friends" ); $stmt -> execute (); /* get resultset for metadata */ $result = $stmt -> result_metadata (); /* retrieve field information from metadata result set */ $field = $result -> fetch_field (); printf ( "Fieldname: %s\n" , $field -> name ); /* close resultset */ $result -> close (); /* close connection */ $maxdb -> close (); ?>
Przykład 2. Procedural style
<?php = maxdb_connect ( "localhost" , "MONA" , "RED" , "DEMODB" ); maxdb_query ( $link , "CREATE TABLE temp.friends (id int, name varchar(20))" ); maxdb_query ( $link , "INSERT INTO temp.friends VALUES (1,'Hartmut')" ); maxdb_query ( $link , "INSERT INTO temp.friends VALUES (2, 'Ulf')" ); $stmt = maxdb_prepare ( $link , "SELECT id, name FROM temp.friends" ); maxdb_stmt_execute ( $stmt ); /* get resultset for metadata */ $result = maxdb_stmt_result_metadata ( $stmt ); /* retrieve field information from metadata result set */ $field = maxdb_fetch_field ( $result ); printf ( "Fieldname: %s\n" , $field -> name ); /* close resultset */ maxdb_free_result ( $result ); /* close connection */ maxdb_close ( $link ); ?>
The above examples would produce the following output:
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