LATEST VERSION: 8.1.0 - CHANGELOG
Pivotal GemFire® v8.1

Joins

Joins

If collections in the FROM clause are not related to each other, you can use the WHERE clause to join them.

The statement below returns all the persons from the /Persons region with the same name as a flower in the /Flowers region.

SELECT DISTINCT p FROM /Persons p, /Flowers f WHERE p.name = f.name

Indexes are supported for region joins. To create indexes for region joins, you create single-region indexes for both sides of the join condition. These are used during query execution for the join condition.