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With the ObjectGrid query engine, you can use a single query language for searching the ObjectGrid cache. This query language can query Java objects that are stored in ObjectMaps, and it can query Entity objects. Use the following syntax for creating a query string.
An ObjectGrid query is a string that contains the following elements:
- A SELECT clause that specifies the objects or values to return.
- A FROM clause that names the object collections.
- An optional WHERE clause that contains search predicates over the collections.
- An optional GROUP BY and HAVING clause (see ObjectGrid query aggregation functions).
- An optional ORDER BY clause that specifies the ordering of the result collection.
Collections of Java objects are identified in queries through the use of their name in the query FROM clause.
The elements of query language are discussed in more detail in the following related topics:
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