You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@hive.apache.org by "slim bouguerra (JIRA)" <ji...@apache.org> on 2018/06/14 14:32:00 UTC
[jira] [Updated] (HIVE-19695) Year Month Day extraction functions
need to add an implicit cast for column that are String types
[ https://issues.apache.org/jira/browse/HIVE-19695?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
slim bouguerra updated HIVE-19695:
----------------------------------
Attachment: HIVE-19695.2.patch
> Year Month Day extraction functions need to add an implicit cast for column that are String types
> -------------------------------------------------------------------------------------------------
>
> Key: HIVE-19695
> URL: https://issues.apache.org/jira/browse/HIVE-19695
> Project: Hive
> Issue Type: Bug
> Components: Druid integration, Query Planning
> Affects Versions: 3.0.0
> Reporter: slim bouguerra
> Assignee: slim bouguerra
> Priority: Major
> Attachments: HIVE-19695.1.patch, HIVE-19695.2.patch, HIVE-19695.patch, HIVE-19695.patch
>
>
> To avoid surprising/wrong results, Hive Query plan shall add an explicit cast over non date/timestamp column type when user try to extract Year/Month/Hour etc..
> This is an example of misleading results.
> {code}
> create table test_base_table(`timecolumn` timestamp, `date_c` string, `timestamp_c` string, `metric_c` double);
> insert into test_base_table values ('2015-03-08 00:00:00', '2015-03-10', '2015-03-08 00:00:00', 5.0);
> CREATE TABLE druid_test_table
> STORED BY 'org.apache.hadoop.hive.druid.DruidStorageHandler'
> TBLPROPERTIES ("druid.segment.granularity" = "DAY")
> AS select
> cast(`timecolumn` as timestamp with local time zone) as `__time`, `date_c`, `timestamp_c`, `metric_c` FROM test_base_table;
> select
> year(date_c), month(date_c),day(date_c), hour(date_c),
> year(timestamp_c), month(timestamp_c),day(timestamp_c), hour(timestamp_c)
> from druid_test_table;
> {code}
> will return the following wrong results:
> {code}
> PREHOOK: query: select
> year(date_c), month(date_c),day(date_c), hour(date_c),
> year(timestamp_c), month(timestamp_c),day(timestamp_c), hour(timestamp_c)
> from druid_test_table
> PREHOOK: type: QUERY
> PREHOOK: Input: default@druid_test_table
> #### A masked pattern was here ####
> POSTHOOK: query: select
> year(date_c), month(date_c),day(date_c), hour(date_c),
> year(timestamp_c), month(timestamp_c),day(timestamp_c), hour(timestamp_c)
> from druid_test_table
> POSTHOOK: type: QUERY
> POSTHOOK: Input: default@druid_test_table
> #### A masked pattern was here ####
> 1969 12 31 16 1969 12 31 16
> {code}
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)