Release Notes > Summer 2016 - June > MongoDB Connector
  

MongoDB Connector

MongoDB Connector Fixed Limitations

There are no fixed limitations in this release.
Review the Release Notes of previous releases for information about previous fixed limitations.

MongoDB Connector Known Limitations

The following table describes known limitations:
CR
Description
CON-2350
If you run a task with the ODBC driver enabled to read from or write to MongoDB as a JSON document, the status logs of the Data Synchronization task shows as successful even though the Secure Agent fails to load the data from or to MongoDB.
CON-2349
The virtual tables from MongoDB appear in the source or target view of a task only when you import the table metadata.
CON-2348
When you refresh a MongoDB connection in the source or target view of a task, the dropped MongoDB collections still appear in the source objects or target objects list.
CON-2347
You cannot use Mongo shell commands in preprocessing and postprocessing commands of a task to write data to MongoDB.
CON-2346
You cannot use the MongoDB ODBC driver to import a MongoDB collection that does not contain data.
CON-2345
Transformation errors appear in the mapping log for MongoDB Connector even if the mapping does not contain any transformations.
Workaround: You can ignore the transformation errors.
CON-2077
When you create a MongoDB connection and specify the schema name, the connection fails with an error stating that the schema is not supported.
Workaround: Do not specify the schema name in the connection attributes. Instead, specify the database name in the Data Source Name (DSN) entry.

MongoDB Third-Party Limitations

The following table describes third-party known limitations:
Third Party CR
Description
CON-2354
Even when you enable Show array count in virtual main table, the MongoDB driver does not create the array count column.
CON-2353
When you run a mapping with a Joiner transformation to read from a MongoDB database prior to version 2.6.3, the following error might appear in the mapping log even if the nested element is not null: LEFT_SUBFIELD only supports Object
CON-2352
When you enable reading or writing as JSON documents, JSON import might fail because the JSON import and export formats in the MongoDB driver are not symmetrical.
Workaround: To load JSON documents, use the mongoimport tool.
CON-2351
When you use MongoDB Connector to insert, update, or delete records in the MongoDB database, the performance for each of these operations is slow for a MongoDB cluster when compared to a single node.