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From "Apache Spark (JIRA)" <>
Subject [jira] [Commented] (SPARK-24966) Fix the precedence rule for set operations.
Date Wed, 01 Aug 2018 05:51:00 GMT


Apache Spark commented on SPARK-24966:

User 'dilipbiswal' has created a pull request for this issue:

> Fix the precedence rule for set operations.
> -------------------------------------------
>                 Key: SPARK-24966
>                 URL:
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.3.1
>            Reporter: Dilip Biswal
>            Priority: Major
> Currently the set operations INTERSECT, UNION and EXCEPT are assigned the same precedence.
We need to change to make sure INTERSECT is given higher precedence than UNION and EXCEPT.
UNION and EXCEPT should be evaluated in the order they appear in the query from left to right.

> Given this will result in a change in behavior, we need to keep it under a config.
> Here is a reference :

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