$bitsAnyClear
The $bitsAnyClear operator matches documents where any of the specified bit positions in a bitmask are clear.
$bitsAnyClear
This operator is used to match documents where any of the bit positions specified in a bitmask are clear (that is, 0). It's useful for querying documents with binary data or flags stored as integers. This operator enables efficient querying based on specific bit patterns.
Parameters
| Parameter | Description |
|---|---|
field | The field in the document to be queried. |
<bitmask> | A bitmask where each bit position represents a position to check if it's clear (0). |
Examples
Consider this sample document from the stores collection.
{
"_id": "0fcc0bf0-ed18-4ab8-b558-9848e18058f4",
"name": "First Up Consultants | Beverage Shop - Satterfieldmouth",
"location": {
"lat": -89.2384,
"lon": -46.4012
},
"staff": {
"totalStaff": {
"fullTime": 8,
"partTime": 20
}
},
"sales": {
"totalSales": 75670,
"salesByCategory": [
{
"categoryName": "Wine Accessories",
"totalSales": 34440
},
{
"categoryName": "Bitters",
"totalSales": 39496
},
{
"categoryName": "Rum",
"totalSales": 1734
}
]
},
"promotionEvents": [
{
"eventName": "Unbeatable Bargain Bash",
"promotionalDates": {
"startDate": {
"Year": 2024,
"Month": 6,
"Day": 23
},
"endDate": {
"Year": 2024,
"Month": 7,
"Day": 2
}
},
"discounts": [
{
"categoryName": "Whiskey",
"discountPercentage": 7
},
{
"categoryName": "Bitters",
"discountPercentage": 15
},
{
"categoryName": "Brandy",
"discountPercentage": 8
},
{
"categoryName": "Sports Drinks",
"discountPercentage": 22
},
{
"categoryName": "Vodka",
"discountPercentage": 19
}
]
},
{
"eventName": "Steal of a Deal Days",
"promotionalDates": {
"startDate": {
"Year": 2024,
"Month": 9,
"Day": 21
},
"endDate": {
"Year": 2024,
"Month": 9,
"Day": 29
}
},
"discounts": [
{
"categoryName": "Organic Wine",
"discountPercentage": 19
},
{
"categoryName": "White Wine",
"discountPercentage": 20
},
{
"categoryName": "Sparkling Wine",
"discountPercentage": 19
},
{
"categoryName": "Whiskey",
"discountPercentage": 17
},
{
"categoryName": "Vodka",
"discountPercentage": 23
}
]
}
]
}The storeFeatures field is a bitmask integer representing various store capabilities. Each bit corresponds to a feature:
| Bit | Value | Feature |
|---|---|---|
| 0 | 1 | In-Store Pickup |
| 1 | 2 | Parking |
| 2 | 4 | Wheelchair Access |
| 3 | 8 | Open 24 Hours |
| 4 | 16 | Pet-Friendly |
| 5 | 32 | Free Wi-Fi |
| 6 | 64 | Restrooms |
| 7 | 128 | Home Delivery |
Example 1: Find stores that don’t have Wi-Fi or in-store pickup
This query retrieves stores that don’t have either Wi-Fi OR in-store pickup (bits 0 and 5)
db.stores.find({
storeFeatures: {
$bitsAnyClear: [0, 5]
}
}, {
_id: 1,
name: 1,
storeFeatures: 1
}).limit(5)Equivalent:
db.stores.find({
storeFeatures: {
$bitsAnySet: 33
}
}, // 1 + 32
{
_id: 1,
name: 1,
storeFeatures: 1
}).limit(5)The first five results returned by this query are:
[
{
"_id": "a715ab0f-4c6e-4e9d-a812-f2fab11ce0b6",
"name": "Lakeshore Retail | Holiday Supply Hub - Marvinfort",
"storeFeatures": 38
},
{
"_id": "7e53ca0f-6e24-4177-966c-fe62a11e9af5",
"name": "Contoso, Ltd. | Office Supply Deals - South Shana",
"storeFeatures": 86
},
{
"_id": "44fdb9b9-df83-4492-8f71-b6ef648aa312",
"name": "Fourth Coffee | Storage Solution Gallery - Port Camilla",
"storeFeatures": 222
},
{
"_id": "e6410bb3-843d-4fa6-8c70-7472925f6d0a",
"name": "Relecloud | Toy Collection - North Jaylan",
"storeFeatures": 108
},
{
"_id": "9024d615-eed0-429a-a098-6640207cc2b6",
"name": "Adatum Corporation | Paper Product Mart - Lake Coralie",
"storeFeatures": 204
}
]