[GitHub] [spark] wangyum opened a new pull request #22038: [SPARK-25056][SQL] Unify the InConversion and BinaryComparison behavior

Wed, 26 Aug 2020 02:30:24 -0700 


wangyum opened a new pull request #22038:
URL: https://github.com/apache/spark/pull/22038


   ## What changes were proposed in this pull request?
   before this PR:
   ```scala
   scala> val df = spark.range(4).toDF().selectExpr("cast(id as decimal(9, 2)) 
as id")
   df: org.apache.spark.sql.DataFrame = [id: decimal(9,2)]
   
   scala> df.filter("id in('1', '3')").show
   +---+
   | id|
   +---+
   +---+
   
   scala> df.filter("id = '1' or id ='3'").show
   +----+
   |  id|
   +----+
   |1.00|
   |3.00|
   +----+
   ```
   after this PR:
   ```scala
   scala> val df = spark.range(4).toDF().selectExpr("cast(id as decimal(9, 2)) 
as id")
   df: org.apache.spark.sql.DataFrame = [id: decimal(9,2)]
   
   scala> df.filter("id in('1', '3')").show
   +----+
   |  id|
   +----+
   |1.00|
   |3.00|
   +----+
   
   scala> df.filter("id = '1' or id ='3'").show
   +----+
   |  id|
   +----+
   |1.00|
   |3.00|
   +----+
   ```
   
   This change is the same as 
[HIVE-20204](https://issues.apache.org/jira/browse/HIVE-20204).
   
   Other database behavior:
   **Teradata**:
   
![image](https://user-images.githubusercontent.com/5399861/44069251-778312cc-9fb0-11e8-8cf1-aa2e5f6b79d3.png)
   
   **Oracle**:
   
![image](https://user-images.githubusercontent.com/5399861/44069285-95e2a1ec-9fb0-11e8-9266-c5b741cadea2.png)
   
   **MySQL**:
   
![image](https://user-images.githubusercontent.com/5399861/44069455-72b73b14-9fb1-11e8-9d5c-9efcd9ce57b9.png)
   
   **postgres**
   
![image](https://user-images.githubusercontent.com/5399861/44085135-316539ce-9feb-11e8-9966-495161a9e506.png)
   
   **Hive-2.3.2**
   
![image](https://user-images.githubusercontent.com/5399861/44085463-39f19b9a-9fec-11e8-9cc4-ecb5dd3ed345.png)
   
   **Hive** [**current 
master**](https://github.com/apache/hive/commit/1c8449cce2a961c6ca6ce38bef0d770f34221d4d)
   
![image](https://user-images.githubusercontent.com/5399861/44087788-86019128-9ff3-11e8-8e33-fe9a24a0361a.png)
   
   **spark-sql**:
   
![image](https://user-images.githubusercontent.com/5399861/44069556-e95eb8b4-9fb1-11e8-8ad1-5c4c0582b5ae.png)
   
   ## How was this patch tested?
   
   unit tests
   


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