MongoDB::BulkWrite(3) MongoDB bulk write interface

VERSION

version v1.2.3

SYNOPSIS


use Safe::Isa;
use Try::Tiny;
my $bulk = $collection->initialize_ordered_bulk_op;
$bulk->insert_one( $doc );
$bulk->find( $query )->upsert->replace_one( $doc )
$bulk->find( $query )->update( $modification )
my $result = try {
$bulk->execute;
}
catch {
if ( $_->$isa("MongoDB::WriteConcernError") ) {
warn "Write concern failed";
}
else {
die $_;
}
};

DESCRIPTION

This class constructs a list of write operations to perform in bulk for a single collection. On a MongoDB 2.6 or later server with write command support this allow grouping similar operations together for transit to the database, minimizing network round-trips.

To begin a bulk operation, use one these methods from MongoDB::Collection:

  • initialize_ordered_bulk_op
  • initialize_unordered_bulk_op

Ordered Operations

With an ordered operations list, MongoDB executes the write operations in the list serially. If an error occurs during the processing of one of the write operations, MongoDB will return without processing any remaining write operations in the list.

Unordered Operations

With an unordered operations list, MongoDB can execute in parallel, as well as in a nondeterministic order, the write operations in the list. If an error occurs during the processing of one of the write operations, MongoDB will continue to process remaining write operations in the list.

ATTRIBUTES

collection (required)

The MongoDB::Collection where the operations are to be performed.

ordered (required)

A boolean for whether or not operations should be ordered (true) or unordered (false).

bypassDocumentValidation

A boolean for whether or not operations should bypass document validation. Default is false.

METHODS

find

    $view = $bulk->find( $query_document );

The "find" method returns a MongoDB::BulkWriteView object that allows write operations like "update" or "remove", constrained by a query document.

A query document is required. Use an empty hashref for no criteria: 

    $bulk->find( {} )->remove; # remove all documents!

An exception will be thrown on error.

insert_one

    $bulk->insert_one( $doc );

Queues a document for insertion when ``execute'' is called. The document may be a hash reference, an array reference (with balanced key/value pairs) or a Tie::IxHash object. If the document does not have an "_id" field, one will be added to the original.

The method has an empty return on success; an exception will be thrown on error.

execute

    my $result = $bulk->execute;

Executes the queued operations. The order and semantics depend on whether the bulk object is ordered or unordered:

  • ordered — operations are executed in order, but operations of the same type (e.g. multiple inserts) may be grouped together and sent to the server. If the server returns an error, the bulk operation will stop and an error will be thrown.
  • unordered — operations are grouped by type and sent to the server in an unpredictable order. After all operations are sent, if any errors occurred, an error will be thrown.

When grouping operations of a type, operations will be sent to the server in batches not exceeding 16MiB or 1000 items (for a version 2.6 or later server) or individually (for legacy servers without write command support).

This method returns a MongoDB::BulkWriteResult object if the bulk operation executes successfully.

Typical errors might include:

  • "MongoDB::WriteError" — one or more write operations failed
  • "MongoDB::WriteConcernError" - all writes were accepted by a primary, but the write concern failed
  • "MongoDB::DatabaseError" — a command to the database failed entirely

See MongoDB::Error for more on error handling.

NOTE: it is an error to call "execute" without any operations or to call "execute" more than once on the same bulk object.

AUTHORS

COPYRIGHT AND LICENSE

This software is Copyright (c) 2016 by MongoDB, Inc..

This is free software, licensed under: 

  The Apache License, Version 2.0, January 2004

LAST SEARCHED