[jira] [Updated] (SPARK-32228) Partition column of hive table was capitalized as directory name when stored on HDFS

["Kernel Force (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-32228?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kernel Force updated SPARK-32228:
---------------------------------
    Summary: Partition column of hive table was capitalized as directory name when stored on HDFS  (was: Partition column of hive table was capitalized and stored on HDFS)

> Partition column of hive table was capitalized as directory name when stored on HDFS
> ------------------------------------------------------------------------------------
>
>                 Key: SPARK-32228
>                 URL: https://issues.apache.org/jira/browse/SPARK-32228
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 3.0.0
>         Environment: Hadoop 2.7.7
> Hive 2.3.6
> Spark 3.0.0
>            Reporter: Kernel Force
>            Priority: Major
>   Original Estimate: 10h
>  Remaining Estimate: 10h
>
> Suppose we have a target hive table to be insert by spark with dynamic partition feature on.
> {code:sql}
> CREATE TABLE DEMO_PART (
> ID VARCHAR(10),
> NAME VARCHAR(10)
> ) PARTITIONED BY (BATCH DATE, TEAM VARCHAR(10))
> STORED AS ORC;
> {code}
> And have a source data table like:
> {code:sql}
> 0: jdbc:hive2://HOSTNAME:10000> SELECT T.* FROM DEMO_DATA T;
> +-------+---------+-------------+---------+
> | t.id  | t.name  |   t.batch   | t.team  |
> +-------+---------+-------------+---------+
> | 1     | mike    | 2020-07-08  | A       |
> | 2     | john    | 2020-07-07  | B       |
> +-------+---------+-------------+---------+
> 2 rows selected (0.177 seconds)
> {code}
> Then doing join operation against an exploded view and insert the result into DEMO_PART table:
> {code:sql}
> sql("""
> WITH VA AS (
> SELECT ARRAY_REPEAT(1,10) A
> ),
> VB AS (
> SELECT EXPLODE(T.A) IDX FROM VA T
> ),
> VC AS (
> SELECT ROW_NUMBER() OVER(ORDER BY NULL) RN FROM VB T
> ),
> VD AS (
> SELECT T.RN, DATE_ADD(TO_DATE('2020-07-01','yyyy-MM-dd'),T.RN) DT FROM VC T
> ),
> VE AS (
> SELECT T.DT BATCH, T.RN ID, CASE WHEN T.RN > 5 THEN 'A' ELSE 'B' END TEAM FROM VD T
> )
> SELECT T.BATCH BATCH, S.ID ID, S.NAME NAME, S.TEAM TEAM FROM VE T 
> INNER JOIN DEMO_DATA S
> ON T.TEAM = S.TEAM
> """).
> selectExpr(spark.table("DEMO_PART").columns:_*).
> write.mode("overwrite").insertInto("DEMO_PART")
> {code}
> The result could NOT be read by hive beeline:
> {code:sql}
> 0: jdbc:hive2://HOSTNAME:10000> SELECT T.* FROM DEMO_PART T;
> +-------+---------+----------+---------+
> | t.id  | t.name  | t.batch  | t.team  |
> +-------+---------+----------+---------+
> +-------+---------+----------+---------+
> No rows selected (0.268 seconds)
> {code}
> Because the underlying data was stored in HDFS uncorrectly:
> {code:bash}
> [user@HOSTNAME ~]$ dfs -ls /user/hive/warehouse/demo_part/                        
> Found 21 items
> /user/hive/warehouse/demo_part/BATCH=2020-07-02
> /user/hive/warehouse/demo_part/BATCH=2020-07-03
> /user/hive/warehouse/demo_part/BATCH=2020-07-04
> /user/hive/warehouse/demo_part/BATCH=2020-07-05
> /user/hive/warehouse/demo_part/BATCH=2020-07-06
> /user/hive/warehouse/demo_part/BATCH=2020-07-07
> /user/hive/warehouse/demo_part/BATCH=2020-07-08
> /user/hive/warehouse/demo_part/BATCH=2020-07-09
> /user/hive/warehouse/demo_part/BATCH=2020-07-10
> /user/hive/warehouse/demo_part/BATCH=2020-07-11
> /user/hive/warehouse/demo_part/_SUCCESS        
> /user/hive/warehouse/demo_part/batch=2020-07-02
> /user/hive/warehouse/demo_part/batch=2020-07-03
> /user/hive/warehouse/demo_part/batch=2020-07-04
> /user/hive/warehouse/demo_part/batch=2020-07-05
> /user/hive/warehouse/demo_part/batch=2020-07-06
> /user/hive/warehouse/demo_part/batch=2020-07-07
> /user/hive/warehouse/demo_part/batch=2020-07-08
> /user/hive/warehouse/demo_part/batch=2020-07-09
> /user/hive/warehouse/demo_part/batch=2020-07-10
> /user/hive/warehouse/demo_part/batch=2020-07-11
> {code}
> Both "BATCH=XXXX" and "batch=XXXX" directories appeared, and the data files was stored in "BATCH" directories but not "batch"
> The result will be correct if I change the SQL statement, simply change the column alias to lower case in the last select, like:
> {code:sql}
> SELECT T.BATCH batch, S.ID id, S.NAME name, S.TEAM team FROM VE T 
> INNER JOIN DEMO_DATA S
> ON T.TEAM = S.TEAM
> {code}



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