GemFire provides a SQL-like querying language called OQL that allows you to access data stored in GemFire regions.
Since GemFire regions are key-value stores where values can range from simple byte arrays to complex nested objects, GemFire uses a query syntax based on OQL (Object Query Language) to query region data. OQL is very similar to SQL, but OQL allows you to query complex objects, object attributes, and methods.
This topic answers some frequently asked questions on querying functionality. It provides examples to help you get started with GemFire querying.
This section provides a high-level introduction to GemFire querying such as building a query string and describes query language features.
Writing and Executing a Query in OQL
This section explains how to create a Query object and use it to perform query-related operations.
This section includes advanced querying topics such as using query indexes, using query bind parameters, querying partitioned regions and query debugging.
The GemFire query engine supports indexing. An index can provide significant performance gains for query execution.