saml: Fix SAML 2.0 SP logout with PostgreSQL.

The PostgreSQL database server returns all column names in lowercase,
but we are using mixed case column names. This patch changes the query
to always request lowercase column names.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@3207 44740490-163a-0410-bde0-09ae8108e29a

modules/saml/lib/SP/LogoutStore.php

@@ -108,14 +108,15 @@ class sspmod_saml_SP_LogoutStore {
 			'now' => gmdate('Y-m-d H:i:s'),
 		);
 
-		$query = 'SELECT _sessionIndex, _sessionId FROM ' . $store->prefix . '_saml_LogoutStore' .
+		/* We request the columns in lowercase in order to be compatible with PostgreSQL. */
+		$query = 'SELECT _sessionIndex AS _sessionindex, _sessionId AS _sessionid FROM ' . $store->prefix . '_saml_LogoutStore' .
 			' WHERE _authSource = :_authSource AND _nameId = :_nameId AND _expire >= :now';
 		$query = $store->pdo->prepare($query);
 		$query->execute($params);
 
 		$res = array();
 		while ( ($row = $query->fetch(PDO::FETCH_ASSOC)) !== FALSE) {
-			$res[$row['_sessionIndex']] = $row['_sessionId'];
+			$res[$row['_sessionindex']] = $row['_sessionid'];
 		}
 
 		return $res;