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Posted to issues@spark.apache.org by "Michael Allman (JIRA)" <ji...@apache.org> on 2016/10/18 18:10:58 UTC
[jira] [Created] (SPARK-17990) ALTER TABLE ... ADD PARTITION does
not play nice with mixed-case partition column names
Michael Allman created SPARK-17990:
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Summary: ALTER TABLE ... ADD PARTITION does not play nice with mixed-case partition column names
Key: SPARK-17990
URL: https://issues.apache.org/jira/browse/SPARK-17990
Project: Spark
Issue Type: Bug
Components: SQL
Environment: Linux
Mac OS with a case-sensitive filesystem
Reporter: Michael Allman
Writing partition data to an external table's file location and then adding those as table partition metadata is a common use case. However, for tables with partition column names with upper case letters, the SQL command {{ALTER TABLE ... ADD PARTITION}} does not work, as illustrated in the following example:
{code}
scala> sql("create external table mixed_case_partitioning (a bigint) PARTITIONED BY (partCol bigint) STORED AS parquet LOCATION '/tmp/mixed_case_partitioning'")
res0: org.apache.spark.sql.DataFrame = []
scala> spark.sqlContext.range(10).selectExpr("id as a", "id as partCol").write.partitionBy("partCol").mode("overwrite").parquet("/tmp/mixed_case_partitioning")
{code}
At this point, doing a {{hadoop fs -ls /tmp/mixed_case_partitioning}} produces the following:
{code}
[msa@jupyter ~]$ hadoop fs -ls /tmp/mixed_case_partitioning
Found 11 items
-rw-r--r-- 3 msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/_SUCCESS
drwxr-xr-x - msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/partCol=0
drwxr-xr-x - msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/partCol=1
drwxr-xr-x - msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/partCol=2
drwxr-xr-x - msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/partCol=3
drwxr-xr-x - msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/partCol=4
drwxr-xr-x - msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/partCol=5
drwxr-xr-x - msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/partCol=6
drwxr-xr-x - msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/partCol=7
drwxr-xr-x - msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/partCol=8
drwxr-xr-x - msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/partCol=9
{code}
Returning to the Spark shell, we execute the following to add the partition metadata:
{code}
scala> (0 to 9).foreach { p => sql(s"alter table mixed_case_partitioning add partition(partCol=$p)") }
{code}
Examining the HDFS file listing again, we see:
{code}
[msa@jupyter ~]$ hadoop fs -ls /tmp/mixed_case_partitioning
Found 21 items
-rw-r--r-- 3 msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/_SUCCESS
drwxr-xr-x - msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/partCol=0
drwxr-xr-x - msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/partCol=1
drwxr-xr-x - msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/partCol=2
drwxr-xr-x - msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/partCol=3
drwxr-xr-x - msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/partCol=4
drwxr-xr-x - msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/partCol=5
drwxr-xr-x - msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/partCol=6
drwxr-xr-x - msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/partCol=7
drwxr-xr-x - msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/partCol=8
drwxr-xr-x - msa supergroup 0 2016-10-18 17:52 /tmp/mixed_case_partitioning/partCol=9
drwxr-xr-x - msa supergroup 0 2016-10-18 17:53 /tmp/mixed_case_partitioning/partcol=0
drwxr-xr-x - msa supergroup 0 2016-10-18 17:53 /tmp/mixed_case_partitioning/partcol=1
drwxr-xr-x - msa supergroup 0 2016-10-18 17:53 /tmp/mixed_case_partitioning/partcol=2
drwxr-xr-x - msa supergroup 0 2016-10-18 17:53 /tmp/mixed_case_partitioning/partcol=3
drwxr-xr-x - msa supergroup 0 2016-10-18 17:53 /tmp/mixed_case_partitioning/partcol=4
drwxr-xr-x - msa supergroup 0 2016-10-18 17:53 /tmp/mixed_case_partitioning/partcol=5
drwxr-xr-x - msa supergroup 0 2016-10-18 17:53 /tmp/mixed_case_partitioning/partcol=6
drwxr-xr-x - msa supergroup 0 2016-10-18 17:53 /tmp/mixed_case_partitioning/partcol=7
drwxr-xr-x - msa supergroup 0 2016-10-18 17:53 /tmp/mixed_case_partitioning/partcol=8
drwxr-xr-x - msa supergroup 0 2016-10-18 17:53 /tmp/mixed_case_partitioning/partcol=9
{code}
Note that {{msck repair table mixed_case_partitioning}} does not exhibit this behavior—it handles this use case correctly.
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