odbc_primarykeys

(PHP 4, PHP 5)

odbc_primarykeys — Gets the primary keys for a table

说明

resource odbc_primarykeys ( resource $connection_id , string $qualifier , string $owner , string $table )

Returns a result identifier that can be used to fetch the column names that comprise the primary key for a table.

参数

connection_id: ODBC 连接标识符，详见 odbc_connect()。
qualifier
owner
table

返回值

Returns an ODBC result identifier 或者在失败时返回 FALSE.

The result set has the following columns:

TABLE_QUALIFIER
TABLE_OWNER
TABLE_NAME
COLUMN_NAME
KEY_SEQ
PK_NAME

PHP手册 - N: Gets the primary keys for a table

用户评论:

ewilde aht bsmdevelopment dawt com (11-Jul-2006 11:39)

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"];

dan dot scott at ca dot ibm dot com (21-Dec-2004 03:51)

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.

Rio Bautista (RRIT) (20-Feb-2004 04:08)

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);

devendra_joshi at hotmail dot com (11-Jul-2003 10:52)

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.