odbc_primarykeys

(PHP 4, PHP 5, PHP 7, PHP 8)

odbc_primarykeys — Liste les colonnes utilisées dans une clé primaire

Description

odbc_primarykeys(
    resource $odbc,
    ?string $catalog,
    string $schema,
    string $table
): resource|false

Liste les colonnes utilisées dans une clé primaire de la table table.

Liste de paramètres

odbc: L'identifiant de connexion ODBC, voir la documentation de la fonction odbc_connect() pour plus de détails.
catalog: Le catalogue ('calificatif' dans le jargon ODBC 2).
schema: Le schéma ('propriétaire' dans le jargon ODBC 2).
table

Valeurs de retour

Retourne un identifiant de résultat ODBC ou false si une erreur survient.

Le jeu de résultat contient les colonnes suivantes :

TABLE_CAT
TABLE_SCHEM
TABLE_NAME
COLUMN_NAME
KEY_SEQ
PK_NAME

Les pilotes peuvent signaler des colonnes supplémentaires.

Le jeu de résultat est ordonné par TABLE_CAT, TABLE_SCHEM, TABLE_NAME et KEY_SEQ.

Exemples

Exemple #1 Lister les Clés primaire d'une Colonne

<?php
$conn = odbc_connect($dsn, $user, $pass);
$primarykeys = odbc_primarykeys($conn, 'TutorialDB', 'dbo', 'TEST');
while (($row = odbc_fetch_array($primarykeys))) {
    print_r($row);
    break; // further rows omitted for brevity
}
?>

Résultat de l'exemple ci-dessus est similaire à :

Array
(
    [TABLE_CAT] => TutorialDB
    [TABLE_SCHEM] => dbo
    [TABLE_NAME] => TEST
    [COLUMN_NAME] => id
    [KEY_SEQ] => 1
    [PK_NAME] => PK__TEST__3213E83FE141F843
)

Voir aussi

odbc_tables() - Liste les tables d'une source
odbc_foreignkeys() - Liste les clés étrangères

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User Contributed Notes 4 notes

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dan dot scott at ca dot ibm dot com ¶

20 years ago


Responding to devendra_joshi:

In DB2 Universal Database for Linux, UNIX, and Windows the catalog views are accessed through the SYSCAT schema, not the SYSIBM schema -- so you should be issuing "SELECT * FROM SYSCAT.KEYCOLUSE" to list all of the columns that participate in a given key constraint.

A complete list of the catalog views for DB2 can be referenced at http://publib.boulder.ibm.com/infocenter/db2help/ by searching for 'catalog views' and selecting the top hit.

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Rio Bautista (RRIT) ¶

20 years ago


Sample to get the primary keys of an MSSQL table:

$cn = odbc_connect( "DSN", "sa", "pwd");

$rs = odbc_primarykeys( $cn, "database", "dbo", "table_name"); 

odbc_result_all($rs);

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devendra_joshi at hotmail dot com ¶

21 years ago


I want a list of primary keys of a table in db2

by using 
'select * from SYSIBM.SYSKEYCOLUSE ' query i am getting the result on CLP
but when i am writing it in PHP as follows it returns 0 ROWS.

$mstmt="select * from SYSIBM.SYSKEYCOLUSE";
$b=odbc_exec($conn,$mstmt);
echo odbc_result_all($b);

where as  if we write this code

$mstmt="select * from SYSIBM.SYSFUNCTIONS";
$b=odbc_exec($conn,$mstmt);
echo odbc_result_all($b);

it returns the correct data.

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-2

ewilde aht bsmdevelopment dawt com ¶

18 years ago


I was trying to find the primary keys from an SQLServer database through the ODBC interface.  Funnily enough, the odbc_primarykeys function doesn't work with SQLServer (at least not my implementation of it).  Fortunately, the sp_keys query is passed through and the answer returned.  This code works (providing you know which database you're dealing with, which is a whole 'nother story).

// If this is SQLServer, we need to do a special operation to get the
// primary keys.
//
// Looks like the implementers of the ODBC interface just blew this
// one off, since the database has a query to return the info and the
// info even comes back with the same column names.
if ($DBType == "SQLServer")
  $KeySel = odbc_exec($DBConn, "sp_pkeys ".$TableName);

// Otherwise, ask the database through ODBC for the primary key
// names.
else $KeySel = odbc_primarykeys($DBConn, $DatabaseName,
  $DatabaseUser, $TableName);

while ($KeySel && ($KeyRec = odbc_fetch_array($KeySel)))
  $KeyCol[$KeyRec["KEY_SEQ"]] = $KeyRec["COLUMN_NAME"];

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