Pivotal GemFire® v8.2

Importing and Using Object Classes

Importing and Using Object Classes

To facilitate the specification of type in variable type declarations and in typecasting expressions, a query string can have IMPORT statements preceding the declarations. By using IMPORT in the query string, the client can tell the cache server about the class definition of the serialized object that is present in the cache server region.

The only place you can have a package name in a query is in an import statement. These are valid:

IMPORT com.myFolder.Portfolio;
IMPORT com.myFolder.Portfolio AS MyPortfolio;

The first form of the import statement allows Portfolio to be used as the name of the class, com.myFolder.Portfolio. The second form provides an alternative class name, MyPortfolio, to be used. This is useful when a class name is not unique across packages and classes in a single query.

Using Imported Classes

The following example uses imported classes:
IMPORT com.commonFolder.Portfolio;
IMPORT com.myFolder.Portfolio AS MyPortfolio;
SELECT DISTINCT mpflo.status
FROM /portfolios pflo TYPE Portfolio,
/myPortfolios mpflo TYPE MyPortfolio,
WHERE pflo.status = 'active' and =
This entire query string must be passed to the query engine, including the IMPORT statements.

Common type names do not require an IMPORT statement. The following table lists the types that are defined by the system and the Java types they represent.