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bitsAnySet.txt
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bitsAnySet.txt
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===========
$bitsAnySet
===========
.. default-domain:: mongodb
.. contents:: On this page
:local:
:backlinks: none
:depth: 1
:class: singlecol
.. query:: $bitsAnySet
:query:`$bitsAnySet` matches documents where *any* of the bit positions
given by the query are set (i.e. ``1``) in ``field``.
.. include:: /includes/extracts/fact-query-bitsanyset-description.rst
Behavior
--------
.. include:: /includes/fact-bindata-endian.rst
Indexes
~~~~~~~
.. include:: /includes/extracts/fact-query-bitwise-indexes-bitsAnySet.rst
Floating Point Values
~~~~~~~~~~~~~~~~~~~~~
.. include:: /includes/extracts/fact-query-bitsanyset-floating-point.rst
Sign Extension
~~~~~~~~~~~~~~
.. include:: /includes/extracts/fact-query-bitsanyset-sign-extension.rst
Examples
--------
.. include:: /includes/extracts/fact-query-bitwise-example-collection.rst
Bit Position Array
~~~~~~~~~~~~~~~~~~
The following query uses the :query:`$bitsAnySet` operator to test
whether field ``a`` has either bit position ``1`` or bit position ``5`` set,
where the least significant bit is position ``0``.
.. code-block:: javascript
db.collection.find( { a: { $bitsAnySet: [ 1, 5 ] } } )
The query matches the following documents:
.. code-block:: javascript
{ "_id" : 1, "a" : 54, "binaryValueofA" : "00110110" }
{ "_id" : 4, "a" : BinData(0,"Zg=="), "binaryValueofA" : "01100110" }
Integer Bitmask
~~~~~~~~~~~~~~~
The following query uses the :query:`$bitsAnySet` operator to test
whether field ``a`` has any bits set at positions ``0``, ``1``, and ``5``
(the binary representation of the bitmask ``35`` is ``00100011``).
.. code-block:: javascript
db.collection.find( { a: { $bitsAnySet: 35 } } )
The query matches the following documents:
.. code-block:: javascript
{ "_id" : 1, "a" : 54, "binaryValueofA" : "00110110" }
{ "_id" : 4, "a" : BinData(0,"Zg=="), "binaryValueofA" : "01100110" }
BinData Bitmask
~~~~~~~~~~~~~~~
The following query uses the :query:`$bitsAnySet` operator to test
whether field ``a`` has any bits set at positions ``4``, and ``5``
(the binary representation of ``BinData(0, "MA==")`` is ``00110000``).
.. code-block:: javascript
db.collection.find( { a: { $bitsAnySet: BinData(0, "MA==") } } )
The query matches the following documents:
.. code-block:: javascript
{ "_id" : 1, "a" : 54, "binaryValueofA" : "00110110" }
{ "_id" : 2, "a" : 20, "binaryValueofA" : "00010100" }
{ "_id" : 3, "a" : 20.0, "binaryValueofA" : "00010100" }
{ "_id" : 4, "a" : BinData(0,"Zg=="), "binaryValueofA" : "01100110" }