Date/Time Functions are working wrong

manasa95

Vertica version 9.2 Date/Time Functions are working wrong
when we provide column_name which contains many rows with "DateTime" (Column Sample: 2019-05-11 23:45:29), the hour value in output we receive is completely wrong when compare to actual hour from actual table (column_name)
For Example: ** Column Sample: 2019-05-11 23:45:29`
**Query: --SELECT HOUR ( "column_name");--
Output: 12(Instead of 23. I got 12).
(or)
--SELECT TIMESTAMP_TRUNC("column_name",'HH'),"column_name",TRUNC("column_name") FROM Table_Name;--
(or)
-- SELECT TO_CHAR ("column_name", 'HH24:MI:SS') AS my_date FROM Table_Name; --
But Hard-code is working correctly
For Example: --SELECT HOUR (TIMESTAMP '2019-05-11 23:45:29');--
--SELECT HOUR ( '2019-05-11 23:45:29');--
I don't know y these functions are wrongly calculating. Can anyone Help to solve this issue?

Bryan_H

Instead of a column sample, could you post a test case that reproduces the issue? This simple case works for me, so how is your table and query different than the following:

dbadmin=> CREATE TABLE testing(c1 TIMESTAMP);
CREATE TABLE
dbadmin=> INSERT INTO testing VALUES ('2019-05-11 23:45:29');
 OUTPUT
--------
      1
(1 row)

dbadmin=> SELECT HOUR(c1) from testing;
 HOUR
------
   23
(1 row)