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Fixed #26974 -- Added HashIndex to django.contrib.postgres.

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Thanks Akshesh Doshi for the initial implementation.
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Nick Pope 2017-12-05 09:43:56 +00:00 • committed by Tim Graham
parent 2092206bee
commit d526b07784
4 changed files with 88 additions and 2 deletions
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19
docs/ref/contrib/postgres/indexes.txt
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@ -72,3 +72,22 @@ available from the ``django.contrib.postgres.indexes`` module.
.. _buffering build: https://www.postgresql.org/docs/current/static/gist-implementation.html#GIST-BUFFERING-BUILD
.. _fillfactor: https://www.postgresql.org/docs/current/static/sql-createindex.html#SQL-CREATEINDEX-STORAGE-PARAMETERS
``HashIndex``
=============
.. class:: HashIndex(fillfactor=None, **options)
.. versionadded:: 2.2
Creates a hash index.
Provide an integer value from 10 to 100 to the fillfactor_ parameter to
tune how packed the index pages will be. PostgreSQL's default is 90.
.. admonition:: Use this index only on PostgreSQL 10 and later
Hash indexes have been available in PostgreSQL for a long time, but
they suffer from a number of data integrity issues in older versions.
.. _fillfactor: https://www.postgresql.org/docs/current/static/sql-createindex.html#SQL-CREATEINDEX-STORAGE-PARAMETERS