Introduction

An Application

Streams

Merging Streams

Joining Streams

State Management

Validators

Query Operators

Aggregation Pipeline Operators

Aggregation Pipeline Stages

Designing Applications

System Variables

Parameters

Custom JSLT Functions

Server-Sent Events

Testing

Documentation

Telemetry

Troubleshooting

Serialisation

Plugins

Auto-scaling

Configuration

Building And Running It

Docker Image

The Command-line

Release Notes

JSON Streams

System Variables

System Variables

The supported MongoDB system variables are DESCEND, KEEP, PRUNE, NOW and ROOT. The extension variable TODAY returns the date part of NOW.

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