Purpose:
A federated query is a concrete subclass of persistent query, created by any datastore or query manager objects. Its purpose is to execute queries across heterogeneous datastores. This query can be a combination of a combined query, SQL query, and other query types involving supported datastores. The result is a DKAny object contains DKFederatedCollection. See also dkIterator, DKFederatedIterator, DKFederatedResultIterator.
Class summary:
class DKFederatedQuery: public dkQuery { public: DKFederatedQuery(); DKFederatedQuery(const DKFederatedQuery& source); virtual ~DKFederatedQuery(); virtual void prepare(const DKNVPair* params); virtual void execute(const DKNVPair* params); virtual DKQueryStatus status(); virtual DKAny result(); };
Members:
DKFederatedQuery(); DKFederatedQuery(const DKFederatedQuery& source); virtual ~DKFederatedQuery();
DKFederatedQuery has two constructors: Constructor and Copy Constructor.
virtual void prepare(const DKNVPair* params);
virtual void execute(const DKNVPair* params);
virtual DKQueryStatus status();
virtual DKAny result();
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