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Asked: 2026-06-08T07:42:41+00:00

I am using bigserial as as column value in postgres. Now bigserial increments automatically,

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I am using bigserial as as column value in postgres. Now bigserial increments automatically, but I don’t want it to increment when same username is entered. Is there a way so that in case of a wrong pg insert value the bigserial won’t increase its value. Or is there a way that I can decrease the value of the bigserial value.

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  1. Editorial Team

    You can set the current value of the associated SEQUENCE with either of two methods:

    1. With an SQL statement:

      ALTER SEQUENCE my_seq RESTART WITH 12345;

    2. With setval():

      SELECT setval('my_seq', 12345, FALSE);

    Take care not to run into duplicate key errors. Note that this does not work well with concurrent transactions. Read the notes in the manual.
    This is hardly useful if you want a gap-less sequence of IDs. Mind the comments for that.

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