This document discusses querying Apache Pulsar streams using Apache Flink. It provides an overview of Pulsar and how it can be used for pub/sub messaging and streaming applications. It then describes how Flink connectors allow querying Pulsar streams through Flink's streaming and table APIs, including support for Pulsar schemas, exactly-once processing, and integration with the Pulsar catalog. The integration provides a unified data processing stack of Pulsar for streaming data storage and Flink for querying and analysis.