Hi,

I am having a table something like this....

CREATE TABLE(PointId integer, PointName varchar(50),PointType integer,
createtime bigint);

where createtime is the current timestamp when the tuple is inserted.

now how do I insert values into the above table. Is there a way to cast
timestamp to bigint.
Also can anyone suggest as to which date function to use -
CURRENT_TIMESTAMP, LOCALTIMESTAMP, timeofday(), now....


---------------------------(end of broadcast)---------------------------
TIP 1: subscribe and unsubscribe commands go to majordomo (AT) postgresql (DOT) org

I would have expected

SELECT current_timestamp::abstime::bigint;

to have worked, but there is no conversion abstime -> bigint.

Instead use

SELECT current_timestamp::abstime::int::bigint;

The final cast to bigint is not strictly neccessary.

This all begs the question, though, of why you are using a bigint for
createtime and not a timestamp?


Pradeepkumar, Pyatalo (IE10) wrote:
--
Edmund Bacon <ebacon (AT) onesystem (DOT) com>

---------------------------(end of broadcast)---------------------------
TIP 1: subscribe and unsubscribe commands go to majordomo (AT) postgresql (DOT) org

You don't need to use a bigint, read the documentation on data types.

There are a number of different things you can use for a timestamp, here
are a few :

abstime
abstime with timezone
timestamp
timestamp with timezone

Then when you are inserting your data, you can use 'now' as the time.

Eg.
CREATE TABLE pointy_stuff (
PointId integer,
PointName varchar(50),
PointType integer,
CreateTime abstime
);

INSERT INTO pointy_stuff (
PointId,
PointName,
PointType,
CreateTime
) VALUES (
'12345',
'point1',
'1',
'now'
);

I believe abstime is the smallest timestamp, but I could be wrong.

To output the data as a bigint I believe you can use this.

SELECT
PointId,
PointName,
PointType,
date_part('epoch',CreateTime) as unix_ts
FROM
pointy_stuff
;

Hope that helps.

Pradeepkumar, Pyatalo (IE10) wrote:

---------------------------(end of broadcast)---------------------------
TIP 4: Don't 'kill -9' the postmaster

On Thu, 12 Aug 2004 07:47:06 -0700
"Pradeepkumar, Pyatalo (IE10)" <Pradeepkumar.Pyatalo (AT) honeywell (DOT) com> threw this fish to the penguins:

You could use(from http://www.postgresql.org/docs/7.4/s...TETIME-EXTRACT)

EXTRACT (field FROM source)
epoch

For date and timestamp values, the number of seconds since 1970-01-01 00:00:00-00 (can be negative); for interval values, the total number of seconds in the interval

e.g.:

select CURRENT_TIMESTAMP, extract('epoch' from CURRENT_TIMESTAMP)::bigint;
(1 row)
timestamptz | date_part
-------------------------------+------------
2004-08-13 13:27:30.715408-04 | 1092418051

The bigint cast will round to the nearest second.


See:
http://www.postgresql.org/docs/7.4/s...TETIME-CURRENT

for subtleties of various current time/date functions.

-- George Young
--
"Are the gods not just?" "Oh no, child.
What would become of us if they were?" (CSL)

---------------------------(end of broadcast)---------------------------
TIP 3: if posting/reading through Usenet, please send an appropriate
subscribe-nomail command to majordomo (AT) postgresql (DOT) org so that your
message can get through to the mailing list cleanly