Zhu, Lipeng 5700c39c89 [SPARK-27578][SQL] Support INTERVAL ... HOUR TO SECOND syntax ... ## What changes were proposed in this pull request? Currently, SparkSQL can support interval format like this. ```sql SELECT INTERVAL '0 23:59:59.155' DAY TO SECOND ``` Like Presto/Teradata, this PR aims to support grammar like below. ```sql SELECT INTERVAL '23:59:59.155' HOUR TO SECOND ``` Although we can add a new function for this pattern, we had better extend the existing code to handle a missing day case. So, the following is also supported. ```sql SELECT INTERVAL '23:59:59.155' DAY TO SECOND SELECT INTERVAL '1 23:59:59.155' HOUR TO SECOND ``` Currently Vertica/Teradata/Postgresql/SQL Server have fully support of below interval functions. - interval ... year to month - interval ... day to hour - interval ... day to minute - interval ... day to second - interval ... hour to minute - interval ... hour to second - interval ... minute to second https://www.vertica.com/docs/9.2.x/HTML/Content/Authoring/SQLReferenceManual/LanguageElements/Literals/interval-qualifier.htm df1a699e5b/src/test/regress/sql/interval.sql (L180-L203) https://docs.teradata.com/reader/S0Fw2AVH8ff3MDA0wDOHlQ/KdCtT3pYFo~_enc8~kGKVw https://docs.microsoft.com/en-us/sql/odbc/reference/appendixes/interval-literals?view=sql-server-2017 ## How was this patch tested? Pass the Jenkins with the updated test cases. Closes #24472 from lipzhu/SPARK-27578. Lead-authored-by: Zhu, Lipeng <lipzhu@ebay.com> Co-authored-by: Dongjoon Hyun <dhyun@apple.com> Co-authored-by: Lipeng Zhu <lipzhu@icloud.com> Signed-off-by: Dongjoon Hyun <dhyun@apple.com>		2019-06-13 10:12:55 -07:00
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main	[SPARK-27578][SQL] Support INTERVAL ... HOUR TO SECOND syntax	2019-06-13 10:12:55 -07:00
test	[SPARK-27578][SQL] Support INTERVAL ... HOUR TO SECOND syntax	2019-06-13 10:12:55 -07:00