Fix version checks, add comment, add LUW version check

Author: NattyNarwhal

tests/test_boolean.phpt

@@ -5,7 +5,7 @@ IBM-DB2: Boolean data type test.
 
 require_once('skipif.inc');
 
-// This test requires IBM i 7.5 or a version of LUW that supports boolean
+// This test requires IBM i 7.5 or DB2/LUW 9.7 for the boolean type
 require_once('connection.inc');
 $conn = db2_connect($database, $user, $password);
 if (!$conn) {
@@ -15,14 +15,19 @@ if (!$conn) {
 $info = db2_server_info($conn);
 if ($info->DBMS_NAME == "AS") { // IBM i
 	// DBMS_VER is VVRRM string
-	$major = $info[1];
-	$minor = $info[3];
-	$mod = $info[4];
+	$major = $info["DBMS_VER"][1];
+	$minor = $info["DBMS_VER"][3];
+	$mod = $info["DBMS_VER"][4];
 	if (!version_compare("$major.$minor.$mod", "7.5.0", ">=")) {
 		die("skip IBM i version too old");
 	}
+} else { // Should cover i.e. DB2/LINUX
+	// DBMS_VER is VV.RR.MMMM, version_compore should work directly
+	if (!version_compare($info["DBMS_VER"], "9.7.0", ">=")) {
+		die("skip DB2 version too old");
+	}
 }
-// XXX: LUW, z
+// XXX: z
 
 ?>
 --FILE--
@@ -40,6 +45,7 @@ $s = db2_exec($conn, "values (true, false)");
 $r = db2_fetch_array($s);
 var_dump($r);
 
+// db2_result can't return true/false due to API limitations, so these will be ints
 $s = db2_exec($conn, "values (true, false)");
 db2_fetch_row($s);
 var_dump(db2_result($s, 0));