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DOCS-13985 clarifies when compound indexes can contain a hashed index… #4740

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Jan 5, 2021
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DOCS-13985 clarifies when compound indexes can contain a hashed index… #4740

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20 changes: 16 additions & 4 deletions source/core/index-compound.txt
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Expand Up @@ -39,10 +39,22 @@ operation that resembles the following prototype:

.. include:: /includes/fact-index-specification-field-value.rst

.. important:: You may not create compound indexes that have
``hashed`` index type. You will receive an error if you attempt to
create a compound index that includes :doc:`a hashed index
field </core/index-hashed>`.
.. important::

Starting in MongoDB 4.4:

- Compound indexes may contain **a single** :doc:`hashed index field
</core/index-hashed>`.
- You will receive an error if you attempt to create a compound index
that contains more than one :doc:`hashed index field
</core/index-hashed>`.

In MongoDB 4.2 or earlier:

- Compound indexes may **not** contain a :doc:`hashed index field
</core/index-hashed>`.
- You will receive an error if you attempt to create a compound index
that contains a :doc:`hashed index field </core/index-hashed>`.

Consider a collection named ``products`` that holds documents that
resemble the following document:
Expand Down