update and add version

Author: jimexist

datafusion-expr/Cargo.toml

@@ -25,7 +25,6 @@ readme = "../README.md"
 authors = ["Apache Arrow <dev@arrow.apache.org>"]
 license = "Apache-2.0"
 keywords = [ "arrow", "query", "sql" ]
-publish = false
 edition = "2021"
 rust-version = "1.58"
 
@@ -36,5 +35,5 @@ path = "src/lib.rs"
 [features]
 
 [dependencies]
-datafusion-common = { path = "../datafusion-common" }
+datafusion-common = { path = "../datafusion-common", version = "6.0.0" }
 arrow = { version = "8.0.0", features = ["prettyprint"] }

datafusion-expr/README.md

@@ -0,0 +1,24 @@
+<!---
+  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
+  regarding copyright ownership.  The ASF licenses this file
+  to you under the Apache License, Version 2.0 (the
+  "License"); you may not use this file except in compliance
+  with the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing,
+  software distributed under the License is distributed on an
+  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+  KIND, either express or implied.  See the License for the
+  specific language governing permissions and limitations
+  under the License.
+-->
+
+# DataFusion Expr
+
+This is an internal module for fundamental expression types of [DataFusion][df].
+
+[df]: https://crates.io/crates/datafusion