database - PostgreSQL : Converting timestamp without time zone to a specific timezone not working -


i trying migrate column in postgres timestamp without time zone timestamp time zone. want german time, used following query :

alter table table_name alter column uploaddate type timestamp time zone using uploaddate @ time zone 'utc+01:30';

unfortunately it's not working, it's adding 2015-06-30 07:30:48.785+05:30. in india, +5.30. how can specify query german time zone. thank you.

what timezone of timestamps stored in table? is, if there value such 2016-09-22 07:30 in table, in timezone 07:30? timezone want use, not current local timezone. e.g. if timestamps expressed in german timezone should like:

alter table table_name alter column uploaddate type timestamp time zone using uploaddate @ time zone 'europe/berlin';

don't forget can run above inside transaction can inspect results before commit them (of course lock entire table , block other concurrent queries table).


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