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Posted to issues@spark.apache.org by "Jia Li (JIRA)" <ji...@apache.org> on 2015/10/06 20:56:27 UTC
[jira] [Commented] (SPARK-10794) Spark-SQL- select query on table
column with binary Data Type displays error message-
java.lang.ClassCastException: java.lang.String cannot be cast to [B
[ https://issues.apache.org/jira/browse/SPARK-10794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14945567#comment-14945567 ]
Jia Li commented on SPARK-10794:
--------------------------------
I tried the repro steps on spark 1.5.0 for hadoop 2.6 and did not see the exception. I'm using hive (version 1.2.1 spark). Please refer to screenshot - spark1_5_0.png.
> Spark-SQL- select query on table column with binary Data Type displays error message- java.lang.ClassCastException: java.lang.String cannot be cast to [B
> ---------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-10794
> URL: https://issues.apache.org/jira/browse/SPARK-10794
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.5.0
> Environment: Spark 1.5.0 running on MapR 5.0 sandbox
> Reporter: Anilkumar Kalshetti
> Priority: Critical
> Attachments: binaryDataType.png, spark_1_5_0.png, testbinary.txt
>
>
> Spark-SQL connected to Hive Metastore-- MapR5.0 has Hive 1.0.0
> Use beeline interface for Spark-SQL
> 1] Execute below query to create Table,
> CREATE TABLE default.testbinary (
> c1 binary,
> c2 string)
> ROW FORMAT DELIMITED FIELDS TERMINATED BY ','
> STORED AS TEXTFILE;
> 2] Copy the attachment file: testbinary.txt in VM directory - /home/mapr/data/
> and execute below script to load data in table
> LOAD DATA LOCAL INPATH '/home/mapr/data/testbinary.txt' INTO TABLE testbinary
> //testbinary.txt contains data
> 1001,'russia'
> 3] Execute below 'Describe' command to get table information, and select command to get table data
> describe testbinary;
> SELECT c1 FROM testbinary;
> 4] Select query displays error message:
> java.lang.ClassCastException: java.lang.String cannot be cast to [B
> Info: for same table - select query on column c2 - string datatype works properly
> SELECT c2 FROM testbinary;
> Please refer screenshot- binaryDataType.png
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