[GitHub] [arrow-datafusion] Jimexist opened a new pull request #1784: split expr type and null info to be expr-schemable

[GitBox <gi...@apache.org>]

Jimexist opened a new pull request #1784:
URL: https://github.com/apache/arrow-datafusion/pull/1784


   # Which issue does this PR close?
   
   - laying a foundation for #1750 
   
    # Rationale for this change
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   # What changes are included in this PR?
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   # Are there any user-facing changes?
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[GitHub] [arrow-datafusion] alamb commented on a change in pull request #1784: [split/11] split expr type and null info to be expr-schemable

[GitBox <gi...@apache.org>]

alamb commented on a change in pull request #1784:
URL: https://github.com/apache/arrow-datafusion/pull/1784#discussion_r801640151



##########
File path: datafusion/src/logical_plan/expr_schema.rs
##########
@@ -0,0 +1,180 @@
+// 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.
+
+use super::Expr;
+use crate::field_util::get_indexed_field;
+use crate::physical_plan::{
+    aggregates, expressions::binary_operator_data_type, functions, window_functions,
+};
+use arrow::datatypes::DataType;
+use datafusion_common::{DataFusionError, ExprSchema, Result};
+
+/// trait to allow expr to typable with respect to a schema
+pub trait ExprSchemable {

Review comment:
       I think this pattern of splitting out the parts of Expr that are needed for logical planning is 👍 




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[GitHub] [arrow-datafusion] Jimexist merged pull request #1784: [split/11] split expr type and null info to be expr-schemable

[GitBox <gi...@apache.org>]

Jimexist merged pull request #1784:
URL: https://github.com/apache/arrow-datafusion/pull/1784


   


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