Ganesh_ND
(Ganesh Nd)
1
Hi!
In aggregation
{
$lookup:
{
from: <collection to join>,
let: { <var_1>: <expression>, …, <var_n>: <expression> },
pipeline: [ <pipeline to execute on the collection to join> ],
as: <output array field>
}
}
is not working in 4.0 version
I am using cosmoDB 4.0 version in Azure
someone please help me to solve this issue
A very valid reason to consider atlas on azure
It will never happen there…
Hi @Ganesh_ND,
As other commenters have noted, CosmosDB is an incomplete emulation of MongoDB (even for the claimed MongoDB server versions).
Some important feature support is lacking, for example index collation:
The let
syntax for Join Conditions & Uncorrelated Sub-queries was added in MongoDB 3.6 (November 2017).
As per @Pavel_Duchovny, MongoDB Atlas is available on Azure if you want a managed database service with genuine MongoDB feature support.
Regards,
Stennie
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