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https://issues.apache.org/jira/browse/SPARK-34763?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-34763:
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Assignee: Apache Spark (was: Kousuke Saruta)
> col(), $"<name>" and df("name") should handle quoted column names properly.
> ---------------------------------------------------------------------------
>
> Key: SPARK-34763
> URL: https://issues.apache.org/jira/browse/SPARK-34763
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.4.7, 3.0.2, 3.2.0, 3.1.1
> Reporter: Kousuke Saruta
> Assignee: Apache Spark
> Priority: Major
>
> Quoted column names like `a``b.c` cannot be represented with col(), $"<name>"
> and df("") because they don't handle such column names properly.
> For example, if we have a following DataFrame.
> {code}
> val df1 = spark.sql("SELECT 'col1' AS `a``b.c`")
> {code}
> For the DataFrame, this query is successfully executed.
> {code}
> scala> df1.selectExpr("`a``b.c`").show
> +-----+
> |a`b.c|
> +-----+
> | col1|
> +-----+
> {code}
> But the following query will fail because df1("`a``b.c`") throws an exception.
> {code}
> scala> df1.select(df1("`a``b.c`")).show
> org.apache.spark.sql.AnalysisException: syntax error in attribute name:
> `a``b.c`;
> at
> org.apache.spark.sql.catalyst.analysis.UnresolvedAttribute$.e$1(unresolved.scala:152)
> at
> org.apache.spark.sql.catalyst.analysis.UnresolvedAttribute$.parseAttributeName(unresolved.scala:162)
> at
> org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.resolveQuoted(LogicalPlan.scala:121)
> at org.apache.spark.sql.Dataset.resolve(Dataset.scala:221)
> at org.apache.spark.sql.Dataset.col(Dataset.scala:1274)
> at org.apache.spark.sql.Dataset.apply(Dataset.scala:1241)
> ... 49 elided
> {code}
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