__construct() public method Constructor.

$bytes public read-only property File content.

batchInsert() public method Inserts batch of new documents

sum() public method Returns the sum of the specified column

dropIndexes() public method Generates drop indexes command

buildSimpleCondition() public method Creates an Mongo

buildAndCondition() public method Connects two or more

dropIndexes() public method (available since version 2.1) Drops

createIndex() public method Creates an index on the collection

$migrationCollection public property The name of the collection