Informix datadict driver: added some sql clauses for future use

lib/Doctrine/DataDict/Informix.php

@@ -29,4 +29,26 @@ Doctrine::autoload('Doctrine_DataDict');
  * @link        www.phpdoctrine.com
  * @since       1.0
  */
-class Doctrine_DataDict_Informix extends Doctrine_DataDict { }
+class Doctrine_DataDict_Informix extends Doctrine_DataDict {
+	protected static $sql = array(
+                    'listTables'          => "SELECT tabname,tabtype FROM systables WHERE tabtype IN ('T','V') AND owner != 'informix'",
+                    'listColumns'         => "SELECT c.colname, c.coltype, c.collength, d.default, c.colno
+		                                      FROM syscolumns c, systables t,outer sysdefaults d
+		                                      WHERE c.tabid = t.tabid AND d.tabid = t.tabid AND d.colno = c.colno
+		                                      AND tabname='%s' ORDER BY c.colno",
+		            'listPk'              => "SELECT part1, part2, part3, part4, part5, part6, part7, part8 FROM
+		                                      systables t, sysconstraints s, sysindexes i WHERE t.tabname='%s'
+		                                      AND s.tabid=t.tabid AND s.constrtype='P'
+		                                      AND i.idxname=s.idxname",
+                    'listForeignKeys'     => "SELECT tr.tabname,updrule,delrule,
+                                              i.part1 o1,i2.part1 d1,i.part2 o2,i2.part2 d2,i.part3 o3,i2.part3 d3,i.part4 o4,i2.part4 d4,
+                                              i.part5 o5,i2.part5 d5,i.part6 o6,i2.part6 d6,i.part7 o7,i2.part7 d7,i.part8 o8,i2.part8 d8
+                                              from systables t,sysconstraints s,sysindexes i,
+                                              sysreferences r,systables tr,sysconstraints s2,sysindexes i2
+                                              where t.tabname='%s'
+                                              and s.tabid=t.tabid and s.constrtype='R' and r.constrid=s.constrid
+                                              and i.idxname=s.idxname and tr.tabid=r.ptabid
+                                              and s2.constrid=r.primary and i2.idxname=s2.idxname",
+                                        );
+
+}