How to get UTC timestamps from JDBC+postgreSql timestamp?

Question

I created a table like like this in PostgreSQL:

create table myTable (
    dateAdded timestamp(0) without time zone null          


        

Answer 1

There are a few tricks specific for the Postgres JDBC driver

See https://jdbc.postgresql.org/documentation/head/java8-date-time.html

So when reading you can do

    Instant utc =resultSet.getObject("dateAdded",LocalDateTime.class).toInstant(ZoneOffset.UTC);

If you use a connection pool such as Hikari, you can also specify the time time-zone used by each connection by setting connectionInitSql=set time zone 'UTC'