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https://issues.apache.org/jira/browse/SPARK-34233?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17276048#comment-17276048
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Apache Spark commented on SPARK-34233:
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User 'yaooqinn' has created a pull request for this issue:
https://github.com/apache/spark/pull/31407
> NPE for char padding in binary comparison
> -----------------------------------------
>
> Key: SPARK-34233
> URL: https://issues.apache.org/jira/browse/SPARK-34233
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.1.0, 3.1.1
> Reporter: Kent Yao
> Assignee: Kent Yao
> Priority: Major
> Fix For: 3.2.0
>
>
> test("char type comparison: top-level columns") {
> withTable("t") {
> sql(s"CREATE TABLE t(c1 CHAR(2), c2 CHAR(5)) USING $format")
> sql("INSERT INTO t VALUES ('a', 'a')")
> testConditions(spark.table("t"), Seq(
> ("c1 = 'a'", true),
> ("'a' = c1", true),
> ("c1 = 'a '", true),
> ("c1 > 'a'", false),
> ("c1 IN ('a', 'b')", true),
> ("c1 = c2", true),
> ("c1 < c2", false),
> ("c1 IN (c2)", true),
> {color:red} ("c1 = null", false))){color}
> }
> }
> the red one will raise NPE
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