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https://issues.apache.org/jira/browse/SPARK-37643?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan reassigned SPARK-37643:
-----------------------------------
Assignee: YuanGuanhu
> when charVarcharAsString is true, char datatype partition table query
> incorrect
> -------------------------------------------------------------------------------
>
> Key: SPARK-37643
> URL: https://issues.apache.org/jira/browse/SPARK-37643
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.1.2, 3.2.0
> Environment: spark 3.2.0
> Reporter: YuanGuanhu
> Assignee: YuanGuanhu
> Priority: Major
>
> This ticket aim at fixing the bug that does not apply right-padding for char
> types column when charVarcharAsString is true and partition data length is
> less than defined length.
> For example, a query below returns nothing in master, but a correct result is
> `abc`.
> {code:java}
> scala> sql("set spark.sql.legacy.charVarcharAsString=true")
> scala> sql("CREATE TABLE tb01(i string, c char(5)) USING parquet partitioned
> by (c)")
> scala> sql("INSERT INTO tb01 values(1, 'abc')")
> scala> sql("select c from tb01 where c = 'abc'").show
> +---+
> | c|
> +---+
> +---+{code}
> This is because `ApplyCharTypePadding` rpad the expr to charLength. We should
> handle this consider conf spark.sql.legacy.charVarcharAsString value.
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