Change the starting value of a serial - Postgresql

Question

I\'ve a little problem with serial : From a file, I filled my database in which I have a client ID (it is a serial and it is my primary key). I have 300 clients so 300 client ID

Answer 1

if your Postgresql version is higher than the upper answer, you could try getting serial key with select pg_get_serial_sequence('ingredients', 'id');

and SELECT adsrc FROM pg_attrdef WHERE adrelid = (SELECT oid FROM pg_class WHERE relname = 'ingredients');

Answer 2

You can alter a sequence using RESTART WITH to change the current sequence number;

ALTER SEQUENCE test_seq RESTART WITH 300;

To get the sequence name if you created it using the serial keyword, use

SELECT adsrc FROM pg_attrdef WHERE adrelid = (SELECT oid FROM pg_class WHERE relname = 'table name goes here'); 

An SQLfiddle to test with.

Answer 3

PostgreSQL

ALTER SEQUENCE tablename_columnname_seq RESTART WITH anynumber;

Example:

ALTER SEQUENCE test_table_rec_id_seq RESTART WITH 4615793;

Answer 4

The solutions above did not work for what I needed.

I needed a serial id to use as a primary key that started from 1000, rather than 1.

In order to do this, I created a standard serial column:

ALTER table my_table ADD COLUMN new_id SERIAL PRIMARY KEY;

and then updated that column:

UPDATE my_table set new_id = new_id + 1000;

I then joined that table to the table with existing non-consecutive id numbers under 1000.