mssql_fetch_field

(PHP 4, PHP 5, PECL odbtp:1.1.1-1.1.4)

mssql_fetch_field — Liefert Informationen über ein Feld

Beschreibung

object mssql_fetch_field ( resource $Ergebniskennung [, int $Feld-Offset ] )

mssql_fetch_field() wird verwendet, um im Ergebnis einer Anfrage Informationen über Felder zu erhalten.

Parameter-Liste

Ergebniskennung: Der Bezeichner des Ergebnisses, das ausgewertet wird. Dieses Ergebnis stammt von einem Aufruf von mssql_query().
Feld-Offset: Der numerische Feld-Offset. Wurde kein Feld-Offset angegeben, liefert diese Funktion das nächste Feld, das noch nicht abgefragt wurde. Der Feld-Offset beginnt bei Null.

Rückgabewerte

Gibt ein Objekt mit Informationen über ein Feld zurück.

Die Eigenschaften dieses Objekts sind:

name - Feldname. Wenn das Feld das Ergebnis einer Funktion ist, wird diese Eigenschaft auf computed#N gesetzt, wobei #N eine fortlaufende Nummer ist.
column_source - die Tabelle, zu der das Feld gehört
max_length - maximale Feldbreite
numeric - 1, wenn es sich um ein numerisches Feld handelt
type - der Feldtyp.

Siehe auch

mssql_field_seek()

mssql_fetch_object

mssql_fetch_batch

Last updated: Fri, 14 Nov 2008

add a note User Contributed Notes
mssql_fetch_field

not a mail address
20-Aug-2008 03:22


kubalaa at bigfoot dot com first reported the problem that column_source contains the FIELD name instead of the source TABLE name 04-Apr-2000 03:58. The bug has been reported as well.



For those who wonder if it was fixed over the past 8 years: No, the bug still is the same, no workaround available.

schattenfeld at gmail dot com
02-Aug-2007 07:43


If you want to describe table like DESCRIBE in MySQL you can use this:

$sql = <<<SQL

SELECT column_name,data_type,column_default,is_nullable

FROM

  information_schema.tables AS t

  JOIN

  information_schema.columns AS c ON

    t.table_catalog=c.table_catalog AND

    t.table_schema=c.table_schema AND

    t.table_name=c.table_name

WHERE

  t.table_name='TABLE-NAME'

SQL;

huszti_dot_roland_at_freemail_dot_com
11-May-2006 05:51


For really detailed table information, use syscolumns, like this:



SELECT c.name, c.prec, c.scale, t.name type

  FROM syscolumns c, systypes t, sysobjects o

  WHERE o.name = 'yourtablename' AND o.id = c.id AND c.xtype = t.xtype



For other properties see the MS SQL online help. Search for 'syscolumns'.



Or an another solution:



sp_columns @table_name = 'yourtablename', @column_name = 'thecolumnname'

//no "select ..." !!!!



This gives info about only the specified column.

php_rindern_de
25-Oct-2004 01:36


commenting Reynard Hilman:



for me it looks like the colstat field value of 1 in syscolumns table indicates an Identity Column.

Reynard Hilman
22-Oct-2003 07:40


If you want to describe table structure (like mysql 'desc table' command), sending this query might help: 

<?

$sql = "SELECT c.name, c.isnullable, c.length, c.colstat, t.name type

  FROM syscolumns c, systypes t, sysobjects o

  WHERE o.name = '$table' AND o.id = c.id AND c.xtype = t.xtype";

?>

I suspect the colstat field in syscolumns table indicates primary key when its value is 1

bmaddy_at_class_dot_umn_dot_edu
29-Apr-2003 07:41


Be aware that this function will only return the first 30 characters of the name of the column.  If the actual column name is longer, it will be truncated.  This is at least true with the following setup:

PHP 4.3.1

MSSQL 8.00.760



Have a good day everyone!

Brian

alonf at spiralsolutions dot com
28-Nov-2002 02:47


As kubalaa at bigfoot dot com note mssql_fetch_field->column_source return field name instead table name also with MSSQL2000 connection. Be adwised!!!

pong at taft dot org
15-Mar-2002 05:07


When you mssql_fetch_field(int result), you need to do loop to get the name of each field.  Something like:



while($fld = mssql_fetch_field($rs)){

        echo $fld->name . "<br>";         

    }



I am wondering why we cannot refer it by a field number.

skipsey at hotmail dot com
08-Feb-2001 07:58


It seems fairly hard to get a list of the tables from your database using MSSQL but this seems to do the trick. This is set to get only the User Tables and ignores the sytem tables.





<?php


mssql_connect("server","","") or die ("help me!");


mssql_select_db("") or die ("Noooo!");





$result = mssql_query ("sp_tables");


$fields = mssql_num_fields ($result);


$rows   = mssql_num_rows ($result);





for ($f=0; $f<$rows; $f++) {    


    $CHKTYPE=GetField($result,"TABLE_TYPE",$f);


    


    if($CHKTYPE=='TABLE'){





        //$name = mssql_fetch_field($result, 2); 


        $field=GetField($result,"TABLE_NAME",$f)."<br>";


        echo $field;





    }


}


?>

kubalaa at bigfoot dot com
04-Apr-2000 03:58


Using this function with MSSQL 7, $returned->column_source is the column name, not the table name as it should be.

add a note

mssql_fetch_object

mssql_fetch_batch

Last updated: Fri, 14 Nov 2008