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
else $KeySel = odbc_primarykeys($DBConn, $DatabaseName,
while ($KeySel && ($KeyRec = odbc_fetch_array($KeySel)))
$KeyCol[$KeyRec["KEY_SEQ"]] = $KeyRec["COLUMN_NAME"];
(PHP 4, PHP 5)
odbc_primarykeys — Gets the primary keys for a table
Returns a result identifier that can be used to fetch the column names that comprise the primary key for a table.
The ODBC connection identifier, see odbc_connect() for details.
Returns an ODBC result identifier or
FALSE on failure.
The result set has the following columns:
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.
Sample to get the primary keys of an MSSQL table:
$cn = odbc_connect( "DSN", "sa", "pwd");
$rs = odbc_primarykeys( $cn, "database", "dbo", "table_name");
I want a list of primary keys of a table in db2
'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";
where as if we write this code
$mstmt="select * from SYSIBM.SYSFUNCTIONS";
it returns the correct data.