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i am trying to create gin index on bigint column and getting an error (PostgreSQL 9.1.9 / Debian 7).

CREATE TABLE test (id bigint CONSTRAINT test_pkey PRIMARY KEY, field bigint);

CREATE INDEX idx_test_field ON test using GIN(field);

ERROR:  data type bigint has no default operator class for access method "gin"
HINT:  You must specify an operator class for the index or define a default operator class for the data type.

Is there no default support for int8 gin,gist indexes ?

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Why do you want to build gin or gist indexes on bigint? Those indexes are for specialized data structures such as geometries, intarray etc.. A simple B-tree index supports >,<,= which is basically all the functionality you need for BIGINTS. –  Alexandros May 30 '14 at 7:43

1 Answer 1

up vote 7 down vote accepted

There's generally no reason to create a GiST or GIN index on a primitive type.

If you do require this - say, if you want a composite index that includes both some primitive types and some more complex GiST / GIN-only index types - then you will want the btree_gist or btree_gin modules, as appropriate.

CREATE EXTENSION btree_gin;
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