MongoDB functions and table engine.
As someone running analytics with Clickhouse, 
I want to be able to create functions that read data from an external MongoDB instance, as well as create tables that span data in external MongoDB instances,
so that I can enrich my analytics with data stored elsewhere, or easily migrate data from a MongoDB instance to my Aiven for Clickhouse instance.
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       Miguel
    
 commented Miguel
    
 commentedWe use MongoDB as our primary OLTP database and it contains some transactional data that we often need to query together to generate analytics responses. 
