Index: PGConnection.h
==================================================================
--- PGConnection.h
+++ PGConnection.h
@@ -18,8 +18,8 @@
 - (OFDictionary*)parameters;
 - (void)connect;
 - (void)reset;
 - (PGResult*)executeCommand: (OFString*)command;
 - (PGResult*)executeCommand: (OFString*)command
-		 parameters: (OFArray*)parameters;
+		 parameters: (id)firstParameter, ...;
 - (PGconn*)PG_connection;
 @end

Index: PGConnection.m
==================================================================
--- PGConnection.m
+++ PGConnection.m
@@ -76,32 +76,37 @@
 	PQclear(result);
 	return nil;
 }
 
 - (PGResult*)executeCommand: (OFString*)command
-		 parameters: (OFArray*)parameters_
+		 parameters: (id)parameter, ...
 {
 	OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
 	PGresult *result;
 	const char **values;
+	va_list args, args2;
+	size_t argsCount;
+
+	va_start(args, parameter);
+	va_copy(args2, args);
+
+	for (argsCount = 1; va_arg(args2, id) != nil; argsCount++);
 
 	values = [self allocMemoryWithSize: sizeof(*values)
-				     count: [parameters_ count]];
+				     count: argsCount];
 	@try {
-		OFEnumerator *enumerator = [parameters_ objectEnumerator];
 		size_t i = 0;
-		id parameter;
 
-		while ((parameter = [enumerator nextObject]) != nil) {
+		do {
 			if ([parameter isKindOfClass: [OFNull class]])
 				values[i++] = NULL;
 			else
 				values[i++] = [parameter UTF8String];
-		}
+		} while ((parameter = va_arg(args, id)) != nil);
 
 		result = PQexecParams(conn, [command UTF8String],
-		    [parameters_ count], NULL, values, NULL, NULL, 0);
+		    argsCount, NULL, values, NULL, NULL, 0);
 	} @finally {
 		[self freeMemory: values];
 	}
 
 	[pool release];

Index: test.m
==================================================================
--- test.m
+++ test.m
@@ -28,17 +28,20 @@
 				    @"    name varchar(255),"
 				    @"    content text"
 				    @")"];
 	[connection executeCommand: @"INSERT INTO test (id, name, content) "
 				    @"VALUES($1, $2, $3)"
-			parameters: @[@"1", @"foo", @"Hallo Welt!"]];
+			parameters: @"1", @"foo", @"Hallo Welt!", nil];
 	[connection executeCommand: @"INSERT INTO test (id, content) "
 				    @"VALUES($1, $2)"
-			parameters: @[@"2", @"Blup!!"]];
+			parameters: @"2", @"Blup!!", nil];
 
 	result = [connection executeCommand: @"SELECT * FROM test"];
 	of_log(@"%@", result);
 	of_log(@"JSON: %@", [result JSONRepresentation]);
+
+	result = [connection executeCommand: @"SELECT COUNT(*) FROM test"];
+	of_log(@"%@", result);
 
 	[OFApplication terminate];
 }
 @end