Re: PG8.3->10 migration data differences

On 10/09/2018 11:22, Csaba Ragasits wrote:
> Hello,
>
> We would like to migrate our old databases to new postgres server, with the simple backup-restore process. The process run fine without errors but when we're  checking the source and the migrated
> datas as field level, we found the following differences:
>
> For example:
>
> Field type: TIMESTAMP WITHOUT TIME ZONE NOT NULL
> pg93: 2015-08-28 21:25:07.70
> pg10: 2015-08-28 21:25:07.7
Those two are absolutely the same value. 7/10 = 70/100
>
> Field type: REAL
> pg93: 2.2
> pg10: 2.20000005
>
Those have to do with rounding. Precision for real is 6 decimal digits. Your difference is on the 8-th digit.
> When I check the 8.3 pg_dump file, it contains the pg83 correct values.
>
> Do you have any ideas, why different this values?
>
> Thx,
> Csaba
>
>

--
Achilleas Mantzios
IT DEV Lead
IT DEPT
Dynacom Tankers Mgmt