Bulk Insert: How to Work With Bulk Insert Operation
One of the features that is particularly useful when inserting large amount of data is bulk inserting
.
This is an optimized time-saving approach with few drawbacks that will be described later.
Syntax
documentStore.bulkInsert([database]);
Parameters | ||
---|---|---|
database | string | Name of database for which bulk operation should be performed. If null then the database from DocumentStore will be used. |
Return Value | |
---|---|
BulkInsertOperation |
Instance of BulkInsertOperation used for interaction. |
BulkInsertOperation
Methods
Signature | Description |
---|---|
async abort() | Aborts the bulk insert operation. Returns a Promise . |
async store(entity, [metadata]) | store the entity, identifier will be generated automatically on client-side. Optional, metadata can be provided for the stored entity. Returns a Promise . |
async store(entity, id, [metadata]) | store the entity, with id parameter to explicitly declare the entity identifier. Optional, metadata can be provided for the stored entity. Returns a Promise . |
async finish() | Finish bulk insert and flush everything to the server. Returns a Promise . |
Limitations
There are a couple limitations to the API:
- The bulk insert operation is broken into batches, each batch is treated in its own transaction so the whole operation isn't treated under a single transaction.
Example
Create bulk insert
Here we create a bulk insert operation and insert a million documents of type Employee
{
const bulkInsert = documentStore.bulkInsert();
for (let i = 0; i < 1000000; i++) {
const employee = new Employee("FirstName #" + i, "LastName #" + i);
await bulkInsert.store(employee);
}
await bulkInsert.finish();
}