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Posted to dev@hive.apache.org by "Nishant Bangarwa (JIRA)" <ji...@apache.org> on 2018/06/27 14:50:00 UTC

[jira] [Created] (HIVE-20013) Add an Implicit cast to date type for to_date function

Nishant Bangarwa created HIVE-20013:
---------------------------------------

             Summary: Add an Implicit cast to date type for to_date function
                 Key: HIVE-20013
                 URL: https://issues.apache.org/jira/browse/HIVE-20013
             Project: Hive
          Issue Type: Bug
            Reporter: Nishant Bangarwa
            Assignee: Nishant Bangarwa


Issue - 
SELECT TO_DATE(date1), TO_DATE(datetime1) FROM druid_table_n1;

Running this query on Druid returns null values when date1 and datetime1 are of type String. 

{code} 
INFO  : Executing command(queryId=hive_20180627144822_d4395567-e3cb-4b20-b53b-4e5eba2d7dac): EXPLAIN SELECT TO_DATE(datetime0) ,TO_DATE(date0) FROM calcs
INFO  : Starting task [Stage-1:EXPLAIN] in serial mode
INFO  : Completed executing command(queryId=hive_20180627144822_d4395567-e3cb-4b20-b53b-4e5eba2d7dac); Time taken: 0.003 seconds
INFO  : OK
+----------------------------------------------------+
|                      Explain                       |
+----------------------------------------------------+
| Plan optimized by CBO.                             |
|                                                    |
| Stage-0                                            |
|   Fetch Operator                                   |
|     limit:-1                                       |
|     Select Operator [SEL_1]                        |
|       Output:["_col0","_col1"]                     |
|       TableScan [TS_0]                             |
|         Output:["vc","vc0"],properties:{"druid.fieldNames":"vc,vc0","druid.fieldTypes":"date,date","druid.query.json":"{\"queryType\":\"scan\",\"dataSource\":\"druid_tableau.calcs\",\"intervals\":[\"1900-01-01T00:00:00.000Z/3000-01-01T00:00:00.000Z\"],\"virtualColumns\":[{\"type\":\"expression\",\"name\":\"vc\",\"expression\":\"timestamp_floor(\\\"datetime0\\\",'P1D','','UTC')\",\"outputType\":\"LONG\"},{\"type\":\"expression\",\"name\":\"vc0\",\"expression\":\"timestamp_floor(\\\"date0\\\",'P1D','','UTC')\",\"outputType\":\"LONG\"}],\"columns\":[\"vc\",\"vc0\"],\"resultFormat\":\"compactedList\"}","druid.query.type":"scan"} |
|                                                    |
+----------------------------------------------------+
10 rows selected (0.606 seconds)

{code}



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