Re: Issue with timestamp without time zone datatype with default value as now()/localtimestamp

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От Rob Sargent
Тема Re: Issue with timestamp without time zone datatype with default value as now()/localtimestamp
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Msg-id 4E53AAF2-4117-4249-A98E-56412E083BC3@gmail.com
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Ответ на Re: Issue with timestamp without time zone datatype with default value as now()/localtimestamp  (Deepika S Gowda <deepika.gs@gmail.com>)
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On Jul 11, 2020, at 3:17 AM, Deepika S Gowda <deepika.gs@gmail.com> wrote:


Hi Adrian,

System timezone.
[postgres@pvodcdbst0001uk ~]$ timedatectl
      Local time: Fri 2020-07-10 15:44:37 BST
  Universal time: Fri 2020-07-10 14:44:37 UTC
        RTC time: Fri 2020-07-10 14:44:37
       Time zone: Europe/London (BST, +0100)

At DB level,
odc=# select now();
              now
-------------------------------
 2020-07-10 15:45:20.875835+01
(1 row)

odc=# select localtimestamp;
      localtimestamp
---------------------------
 2020-07-10 15:45:33.28083
(1 row)

===============
Createddate is loaded always with default value. its doesnt pick anything from source DB wrt this column value.

As said out of 3k records , sometimes 50 to 100 records it shows as 2019.

Regards,
Deepika


On Fri, Jul 10, 2020 at 7:39 PM Adrian Klaver <adrian.klaver@aklaver.com> wrote:
On 7/10/20 7:03 AM, Deepika S Gowda wrote:
> Hi,
>
> On postgres 11.7 Master/Slave node, there is column named "createddate"
> with datatype "timestamp without time zone" with default value as "now()";
>
> Column Name | Date Type                 | Default value
> createddate |timestamp without time zone|Now()
>
>
> Issue: From the java application , data is getting loaded into this
> table where we expect column value should be today's date with
> timestamp( "2020-07-10 10:56:43.21"). But, out of 3K records, 100
> records are loaded as  "2019-07-10 10:56:43.21" (change in Year).
>
> What could be the issue? we tried changing the default value to
> "localtimestamp".

I would day the choices are:

1) A machine has it's clock set wrong.

2) The data is being loaded with a value for createdate that overrides
the DEFAULT.

>
You’ll have to show the code generating the records. And the insert. 
Your first post had times identical to the sub-second. We’re those artificial values? If so, can you show actual selected values which you believe arrived at approximately the same time but have both years?  Include the sql. 

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