[jira] [Resolved] (SPARK-6644) After adding new columns to a partitioned table and inserting data to an old partition, data of newly added columns are all NULL

["Xiao Li (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-6644?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xiao Li resolved SPARK-6644.
----------------------------
    Resolution: Not A Problem

> After adding new columns to a partitioned table and inserting data to an old partition, data of newly added columns are all NULL
> --------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-6644
>                 URL: https://issues.apache.org/jira/browse/SPARK-6644
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 1.3.0
>            Reporter: dongxu
>
> In Hive, the schema of a partition may differ from the table schema. For example, we may add new columns to the table after importing existing partitions. When using {{spark-sql}} to query the data in a partition whose schema is different from the table schema, problems may arise. Part of them have been solved in [PR #4289|https://github.com/apache/spark/pull/4289]. However, after adding new column(s) to the table, when inserting data into old partitions, values of newly added columns are all {{NULL}}.
> The following snippet can be used to reproduce this issue:
> {code}
> case class TestData(key: Int, value: String)
> val testData = TestHive.sparkContext.parallelize((1 to 2).map(i => TestData(i, i.toString))).toDF()
> testData.registerTempTable("testData")
> sql("DROP TABLE IF EXISTS table_with_partition ")
> sql(s"CREATE TABLE IF NOT EXISTS table_with_partition (key INT, value STRING) PARTITIONED BY (ds STRING) LOCATION '${tmpDir.toURI.toString}'")
> sql("INSERT OVERWRITE TABLE table_with_partition PARTITION (ds = '1') SELECT key, value FROM testData")
> // Add new columns to the table
> sql("ALTER TABLE table_with_partition ADD COLUMNS (key1 STRING)")
> sql("ALTER TABLE table_with_partition ADD COLUMNS (destlng DOUBLE)") 
> sql("INSERT OVERWRITE TABLE table_with_partition PARTITION (ds = '1') SELECT key, value, 'test', 1.11 FROM testData")
> sql("SELECT * FROM table_with_partition WHERE ds = '1'").collect().foreach(println)	 
> {code}
> Actual result:
> {noformat}
> [1,1,null,null,1]
> [2,2,null,null,1]
> {noformat}
> Expected result:
> {noformat}
> [1,1,test,1.11,1]
> [2,2,test,1.11,1]
> {noformat}



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