[jira] [Assigned] (SPARK-30826) LIKE returns wrong result from external table using parquet

["Wenchen Fan (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-30826?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wenchen Fan reassigned SPARK-30826:
-----------------------------------

    Assignee: Maxim Gekk

> LIKE returns wrong result from external table using parquet
> -----------------------------------------------------------
>
>                 Key: SPARK-30826
>                 URL: https://issues.apache.org/jira/browse/SPARK-30826
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.4.5, 3.0.0
>            Reporter: Maxim Gekk
>            Assignee: Maxim Gekk
>            Priority: Major
>
> # Write a parquet file with a column in upper case:
> {code:scala}
> Seq("42").toDF("COL").write.parquet(path)
> {code}
> # Create an external table on top of the written parquet files with a column in lower case
> {code:sql}
> CREATE TABLE t1 (col STRING)
> USING parquet
> OPTIONS (path '$path')
> {code}
> # Read the table using LIKE
> {code:sql}
> SELECT * FROM t1 WHERE col LIKE '4%'
> {code}
> It returns empty set but must be one row with 42.



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