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Re: Sequence generating negative numbers

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On 8/19/20 3:24 PM, Shantanu Shekhar wrote:
Please reply to list also.
Ccing list.

Thanks Adrian,

I will reach out to the ORM team and see if they can help me understand this behavior.

I should have asked earlier, is this sequence set as a DEFAULT on the PK field or is it just being used by code to get numbers?


Shantanu
On Wednesday, August 19, 2020, 06:20:27 PM EDT, Adrian Klaver <adrian.klaver@xxxxxxxxxxx> wrote:


On 8/19/20 3:15 PM, Shantanu Shekhar wrote:
 > Team,
 >
 > I have a sequence definition in Postgres 9.6.11 like so:
 >
 > CREATE SEQUENCE IF NOT EXISTS org.my_seq
 >    INCREMENT 1
 >    MINVALUE 1
 >    NO MAXVALUE
 >    START 1
 >    CACHE 20;
 >
 > This sequence is used by a Java ORM framework to generate primary keys
 > for one of our tables. The initial numbers generated by this sequence
 > are as shown below:
 >
 > -28 -27 -26 -25 -8 -7 1 2 52 53 72 92 93 94 112 113 132 133 152 172 192
 > 193 212
 >
 > I am unable to understand why the sequence would start with a negative
 > number, particularly when the definition explicitly asks the sequence to
 > start at 1. This has happened consistently in all of our environments.

Because something in the ORM is generating negative numbers and
supplying then directly to the PK field.


 >
 > Thanks,
 >
 > Shantanu



--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx>





--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx





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