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SERIAL no longer creates an index by default, as of 7.3.

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Bruce Momjian
2003-11-19 16:50:48 +00:00
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Frequently Asked Questions (FAQ) for PostgreSQL
Last updated: Sat Nov 15 23:41:03 EST 2003
Last updated: Wed Nov 19 11:50:04 EST 2003
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
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4.15.1) How do I create a serial/auto-incrementing field?
PostgreSQL supports a SERIAL data type. It auto-creates a sequence and
index on the column. For example, this:
PostgreSQL supports a SERIAL data type. It auto-creates a sequence.
For example, this:
CREATE TABLE person (
id SERIAL,
name TEXT
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id INT4 NOT NULL DEFAULT nextval('person_id_seq'),
name TEXT
);
CREATE UNIQUE INDEX person_id_key ON person ( id );
See the create_sequence manual page for more information about
sequences. You can also use each row's OID field as a unique value.