Bulk.find.hint()
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Tip
MongoDB also provides the db.collection.bulkWrite() method for
performing bulk write operations.
Description
Bulk.find.hint()New in version 4.2.1.
Sets the
hintoption that specifies the index to support theBulk.find()for:The option can take an index specification document or the index name string.
If you specify an index that does not exist, the operation errors.
Bulk.find.hint()has no effect onBulk.find.removeOne()
Example
Create an example collection orders:
db.orders.insertMany( [ { "_id" : 1, "item" : "abc", "price" : NumberDecimal("12"), "quantity" : 2, "type": "apparel" }, { "_id" : 2, "item" : "jkl", "price" : NumberDecimal("20"), "quantity" : 1, "type": "electronics" }, { "_id" : 3, "item" : "abc", "price" : NumberDecimal("10"), "quantity" : 5, "type": "apparel" }, { "_id" : 4, "item" : "abc", "price" : NumberDecimal("8"), "quantity" : 10, "type": "apparel" }, { "_id" : 5, "item" : "jkl", "price" : NumberDecimal("15"), "quantity" : 15, "type": "electronics" } ] )
Create the following indexes on the example collection:
db.orders.createIndex( { item: 1 } ); db.orders.createIndex( { item: 1, quantity: 1 } ); db.orders.createIndex( { item: 1, price: 1 } );
The following bulk operations specify different index to use for the various update/replace document operations:
var bulk = db.orders.initializeUnorderedBulkOp(); bulk.find({ item: "abc", price: { $gte: NumberDecimal("10") }, quantity: { $lte: 10 } }).hint({item: 1, quantity: 1}).replaceOne( { item: "abc123", status: "P", points: 100 } ); bulk.find({ item: "abc", price: { $gte: NumberDecimal("10") }, quantity: { $lte: 10 } }).hint({item: 1, price: 1}).updateOne( { $inc: { points: 10 } } ); bulk.execute();
To view the indexes used, you can use the $indexStats pipeline:
db.orders.aggregate( [ { $indexStats: { } }, { $sort: { name: 1 } } ] )