I\'m trying to store in timestamp with timezone field my value. It is in milliseconds from 1970.
select TO_CHAR(TO_TIMESTAMP(1401432881230), \'DD/MM/YYYY HH24:MI:S
Okay, I understood. My INSERT should looks like:
INSERT INTO events (timestamp) VALUES (to_timestamp(TO_CHAR(TO_TIMESTAMP(1401432881222 / 1000), 'YYYY-MM-DD HH24:MI:SS') || '.' || (1401432881222%1000), 'YYYY-MM-DD HH24:MI:SS.MS'))
I'm converting bigint-timestamp with milliseconds to text with required format ('YYYY-MM-DD HH24:MI:SS.MS') and pass it to to_timestamp function.
This is how I convert ms to timestamp and keep ms instead seconds.The accepted answer will drop ms.
WITH ts AS (SELECT 1401432881230 AS ts)
SELECT to_timestamp(ts / 1000) + ((ts % 1000 ) || ' milliseconds') :: INTERVAL
FROM ts;
-- FOR ALTER COLUMN
ALTER TABLE my_info
ALTER COLUMN tstmp TYPE TIMESTAMP USING to_timestamp(tstmp / 1000) + ((tstmp % 1000) || ' milliseconds') :: INTERVAL;
Unix timestamps measures time with seconds, and not milliseconds (almost everywhere, in PostgreSQL too).
Therefore you need to call
SELECT TO_TIMESTAMP(1401432881230 / 1000);
If you want to preserve milliseconds, call with double precision
:
SELECT TO_TIMESTAMP(1401432881230::double precision / 1000);