maxdb_fetch_field_direct

Fetch meta-data for a single field (PECL)
mixed maxdb_fetch_field_direct ( resource result, int fieldnr )

Procedural style:

Object oriented style (method):

result {
  mixed fetch_field_direct(int fieldnr);
}

maxdb_fetch_field_direct() returns an resource which contains field definition informations from specified resultset. The value of fieldnr must be in the range from 0 to number of fields - 1.

Return values

Returns an resource which contains field definition informations or FALSE if no field information for specified fieldnr is available.

表 134. Object attributes

AttributeDescription
nameThe name of the column
max_lengthThe maximum width of the field for the result set.
typeThe data type used for this field
decimalsThe number of decimals used (for integer fields)

Example

例 992. Object oriented style

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

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

$query = "SELECT name, cno from hotel.customer ORDER BY name";

if (
$result = $maxdb->query($query)) {

 
/* Get field information for column 'SurfaceArea' */
 
$finfo = $result->fetch_field_direct(1);

 
printf("Name:     %s\n", $finfo->name);
 
printf("Table:    %s\n", $finfo->table);
 
printf("max. Len: %d\n", $finfo->max_length);
 
printf("Flags:    %d\n", $finfo->flags);
 
printf("Type:     %d\n", $finfo->type);
 
 
$result->close();
}

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

例 993. Procedural style

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

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

$query = "SELECT name, cno from hotel.customer ORDER BY name";

if (
$result = maxdb_query($link, $query)) {

 
/* Get field information for column 'cno' */
 
$finfo = maxdb_fetch_field_direct($result, 1);

 
printf("Name:     %s\n", $finfo->name);
 
printf("Table:    %s\n", $finfo->table);
 
printf("max. Len: %d\n", $finfo->max_length);
 
printf("Flags:    %d\n", $finfo->flags);
 
printf("Type:     %d\n", $finfo->type);

 
maxdb_free_result($result);
}

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

The above examples would produce the following output:

Name:     CNO
Table:
max. Len: 4
Flags:    -1
Type:     0