docs: update license and add license header

Signed-off-by: Alex Chi <[email protected]>

Author: github-actions[bot]

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2023 CMU Database Group
+Copyright (c) 2023-2024 CMU Database Group
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

datafusion-optd-cli/src/command.rs

@@ -1,3 +1,8 @@
+// Copyright (c) 2023-2024 CMU Database Group
+//
+// Use of this source code is governed by an MIT-style license that can be found in the LICENSE file or at
+// https://opensource.org/licenses/MIT.
+
 // Licensed to the Apache Software Foundation (ASF) under one
 // or more contributor license agreements.  See the NOTICE file
 // distributed with this work for additional information

datafusion-optd-cli/src/exec.rs

@@ -1,3 +1,8 @@
+// Copyright (c) 2023-2024 CMU Database Group
+//
+// Use of this source code is governed by an MIT-style license that can be found in the LICENSE file or at
+// https://opensource.org/licenses/MIT.
+
 // Licensed to the Apache Software Foundation (ASF) under one
 // or more contributor license agreements.  See the NOTICE file
 // distributed with this work for additional information

datafusion-optd-cli/src/lib.rs

@@ -1,3 +1,8 @@
+// Copyright (c) 2023-2024 CMU Database Group
+//
+// Use of this source code is governed by an MIT-style license that can be found in the LICENSE file or at
+// https://opensource.org/licenses/MIT.
+
 // Licensed to the Apache Software Foundation (ASF) under one
 // or more contributor license agreements.  See the NOTICE file
 // distributed with this work for additional information

datafusion-optd-cli/src/main.rs

@@ -1,3 +1,8 @@
+// Copyright (c) 2023-2024 CMU Database Group
+//
+// Use of this source code is governed by an MIT-style license that can be found in the LICENSE file or at
+// https://opensource.org/licenses/MIT.
+
 // Licensed to the Apache Software Foundation (ASF) under one
 // or more contributor license agreements.  See the NOTICE file
 // distributed with this work for additional information

optd-adaptive-demo/src/bin/optd-adaptive-three-join.rs

@@ -1,3 +1,8 @@
+// Copyright (c) 2023-2024 CMU Database Group
+//
+// Use of this source code is governed by an MIT-style license that can be found in the LICENSE file or at
+// https://opensource.org/licenses/MIT.
+
 use std::sync::Arc;
 
 use console::Style;

optd-adaptive-demo/src/bin/optd-adaptive-tpch-q8.rs

@@ -1,3 +1,8 @@
+// Copyright (c) 2023-2024 CMU Database Group
+//
+// Use of this source code is governed by an MIT-style license that can be found in the LICENSE file or at
+// https://opensource.org/licenses/MIT.
+
 use std::sync::Arc;
 use std::time::Duration;
 

optd-core/src/cascades.rs

@@ -1,3 +1,8 @@
+// Copyright (c) 2023-2024 CMU Database Group
+//
+// Use of this source code is governed by an MIT-style license that can be found in the LICENSE file or at
+// https://opensource.org/licenses/MIT.
+
 //! The core cascades optimizer implementation.
 
 mod memo;

optd-core/src/cascades/memo.rs

@@ -1,3 +1,8 @@
+// Copyright (c) 2023-2024 CMU Database Group
+//
+// Use of this source code is governed by an MIT-style license that can be found in the LICENSE file or at
+// https://opensource.org/licenses/MIT.
+
 use std::any::Any;
 use std::collections::hash_map::Entry;
 use std::collections::{HashMap, HashSet};

optd-core/src/cascades/optimizer.rs

@@ -1,3 +1,8 @@
+// Copyright (c) 2023-2024 CMU Database Group
+//
+// Use of this source code is governed by an MIT-style license that can be found in the LICENSE file or at
+// https://opensource.org/licenses/MIT.
+
 use std::collections::{BTreeSet, HashMap, HashSet, VecDeque};
 use std::fmt::Display;
 use std::sync::Arc;