Class: KeyDef

The KeyDef is generally used in conjunction with a TableDataSet. Essentially a KeyDef is what forms the WHERE clause for an UPDATE or DELETE.

In order to use the KeyDef, you simply use it like this:

 $kd = new KeyDef()
 $kd->addAttrib("key_column_a");
 
 $tds = new TableDataSet($conn, "table", $kd);
 $tds->fetchRecords();
 $rec = $tds->getRecord(0);
 $rec->setValue("column_name", "new value" );
 $rec->save();
 $tds->close();

In the above example, Record 0 is retrieved from the database table and the following update statement is generated:

 UPDATE table SET column_name=? WHERE key_column_a=?

Tags:

constructor __construct [line 78]

   $kd = new KeyDef('id'); // id col is pkey
   $kd = new KeyDef('key1', 'key2'); 

method addAttrib [line 89]

method containsAttrib [line 101]

method getAttrib [line 111]

method size [line 122]