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https://issues.apache.org/jira/browse/SPARK-60576?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SPARK-60576:
-----------------------------------
Labels: pull-request-available (was: )
> Parenthesize NOT operands in connector comparisons
> --------------------------------------------------
>
> Key: SPARK-60576
> URL: https://issues.apache.org/jira/browse/SPARK-60576
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 5.0.0
> Reporter: Linhong Liu
> Priority: Major
> Labels: pull-request-available
>
> V2ExpressionSQLBuilder.inputToSQL adds parentheses only for expressions with
> multiple children. NOT has one child but lower SQL precedence than comparison
> operators, so it also needs grouping when used as a comparison operand.
> This also affects the IS NULL and IS NOT NULL checks synthesized for
> null-safe equality. For example, (NOT a) <=> b with a=true and b=false should
> be true, but without operand grouping the generated null-safe equality
> expression evaluates to false.
> Group NOT operands in inputToSQL. Cover NOT on the left, right and both sides
> of comparisons, null-safe equality, and all combinations of TRUE, FALSE and
> NULL.
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