[jira] [Resolved] (PARQUET-723) parquet is not storing the type for the column.

["Sergio Peña (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PARQUET-723?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sergio Peña resolved PARQUET-723.
---------------------------------
    Resolution: Won't Fix

I reported the issue in the Hive jira: https://issues.apache.org/jira/browse/HIVE-15079

> parquet is not storing the type for the column.
> -----------------------------------------------
>
>                 Key: PARQUET-723
>                 URL: https://issues.apache.org/jira/browse/PARQUET-723
>             Project: Parquet
>          Issue Type: Bug
>          Components: parquet-format
>            Reporter: Narasimha
>
> 1. Create Text file format table 
> 	CREATE EXTERNAL TABLE IF NOT EXISTS emp(
> 	id INT,
> 	first_name STRING,
> 	last_name STRING,
> 	dateofBirth STRING,
> 	join_date INT
> 	)
> 	COMMENT 'This is Employee Table Date Of Birth of type String'
> 	ROW FORMAT DELIMITED
> 	FIELDS TERMINATED BY ','
> 	LINES TERMINATED BY '\n'
> 	STORED AS TEXTFILE
> 	LOCATION '/user/employee/beforePartition';
> 2. Load the data into table
> 	load data inpath '/user/somupoc_timestamp/employeeData_partitioned.csv' into table emp;
> 	select * from emp;
> 3. Create Partitioned table with file format as Parquet (dateofBirth STRING))
> 	create external table emp_afterpartition(
> 	id int, first_name STRING, last_name STRING, dateofBirth STRING)
> 	COMMENT 'Employee partitioned table with dateofBirth of type string'
> 	partitioned by (join_date int)
> 	STORED as parquet
> 	LOCATION '/user/employee/afterpartition';
> 4.  Fetch the data from Partitioned column
> 	set hive.exec.dynamic.partition=true;  
> 	set hive.exec.dynamic.partition.mode=nonstrict; 
> 	insert overwrite table emp_afterpartition partition (join_date) select * from emp;
> 	select * from emp_afterpartition;
> 5. Create Partitioned table with file format as Parquet (dateofBirth TIMESTAMP))
> 	CREATE EXTERNAL TABLE IF NOT EXISTS employee_afterpartition_timestamp_parq(
> 	id INT,first_name STRING,last_name STRING,dateofBirth TIMESTAMP)
> 	COMMENT 'employee partitioned table with dateofBirth of type TIMESTAMP'
> 	PARTITIONED BY (join_date INT)
> 	STORED AS PARQUET
> 	LOCATION '/user/employee/afterpartition';
> 	select * from employee_afterpartition_timestamp_parq;
>         -- 0 records returned
> 	impala ::	alter table employee_afterpartition_timestamp_parq RECOVER PARTITIONS;
> 	Hive ::		MSCK REPAIR TABLE employee_afterpartition_timestamp_parq;
> 	-- MSCK works in Hive and  RECOVER PARTITIONS works in Impala -- metastore check command with the repair table option:
>  	select * from employee_afterpartition_timestamp_parq;
> Actual Result :: Failed with exception java.io.IOException:org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.ClassCastException: org.apache.hadoop.io.Text cannot be cast to org.apache.hadoop.hive.serde2.io.TimestampWritable
> Expected Result :: Data should display
> Note: if file format is text file instead of Parquet then I am able to fetch the data.
> Observation : Two tables having different column type pointing to same location(HDFS ).
> sample Data
> =========
> 1,Joyce,Garza,2016-07-17 14:42:18,201607
> 2,Jerry,Ortiz,2016-08-17 21:36:54,201608
> 3,Steven,Ryan,2016-09-10 01:32:40,201609
> 4,Lisa,Black,2015-10-12 15:05:13,201610
> 5,Jose,Turner,2015-011-10 06:38:40,201611
> 6,Joyce,Garza,2016-08-02,201608
> 7,Jerry,Ortiz,2016-01-01,201601
> 8,Steven,Ryan,2016/08/20,201608
> 9,Lisa,Black,2016/09/12,201609
> 10,Jose,Turner,09/19/2016,201609
> 11,Jose,Turner,20160915,201609



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