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maxdb_fetch_field_direct (PECL) maxdb_fetch_field_direct (no version information, might be only in CVS) result->fetch_field_direct --
Fetch meta-data for a single field
DescriptionProcedural style: mixed maxdb_fetch_field_direct ( resource result, int fieldnr ) Object oriented style (method): class 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.
表格 1. Object attributes | Attribute | Description |
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| name | The name of the column | | max_length | The maximum width of the field for the result set. | | type | The data type used for this field | | decimals | The number of decimals used (for integer fields) |
Example例子 1. 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();
?>
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例子 2. 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);
?>
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The above examples would produce the following output:
Name: CNO
Table:
max. Len: 4
Flags: -1
Type: 0 |
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