public NativeQueryExecutionPlan(NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfo classInfo
, NeoDatis.Odb.Core.Query.IQuery query)
{
this.classInfo = classInfo;
this.query = query;
query.SetExecutionPlan(this);
Init();
}
public NativeQueryExecutionPlan(NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfo classInfo
, NeoDatis.Odb.Core.Query.IQuery query)
{
this.classInfo = classInfo;
this.query = query;
query.SetExecutionPlan(this);
Init();
}
public virtual NeoDatis.Odb.Objects <T> Execute <T>(bool inMemory, int startIndex,
int endIndex, bool returnObjects, NeoDatis.Odb.Core.Query.Execution.IMatchingObjectAction
queryResultAction)
{
if (storageEngine.IsClosed())
{
throw new NeoDatis.Odb.ODBRuntimeException(NeoDatis.Odb.Core.NeoDatisError.OdbIsClosed
.AddParameter(storageEngine.GetBaseIdentification().GetIdentification()));
}
if (session.IsRollbacked())
{
throw new NeoDatis.Odb.ODBRuntimeException(NeoDatis.Odb.Core.NeoDatisError.OdbHasBeenRollbacked
);
}
// When used as MultiClass Executor, classInfo is already set
if (classInfo == null)
{
// Class to execute query on
string fullClassName = NeoDatis.Odb.Core.Query.QueryManager.GetFullClassName(query
);
// If the query class does not exist in meta model, return an empty
// collection
if (!session.GetMetaModel().ExistClass(fullClassName))
{
queryResultAction.Start();
queryResultAction.End();
query.SetExecutionPlan(new NeoDatis.Odb.Core.Query.Execution.EmptyExecutionPlan()
);
return(queryResultAction.GetObjects <T>());
}
classInfo = session.GetMetaModel().GetClassInfo(fullClassName, true);
}
// Get the query execution plan
NeoDatis.Odb.Core.Query.Execution.IQueryExecutionPlan plan = GetExecutionPlan();
plan.Start();
try
{
if (plan.UseIndex() && NeoDatis.Odb.OdbConfiguration.UseIndex())
{
return(ExecuteUsingIndex <T>(plan.GetIndex(), inMemory, startIndex, endIndex, returnObjects
, queryResultAction));
}
// When query must be applied to a single object
if (query.IsForSingleOid())
{
return(ExecuteForOneOid <T>(inMemory, returnObjects, queryResultAction));
}
return(ExecuteFullScan <T>(inMemory, startIndex, endIndex, returnObjects, queryResultAction
));
}
finally
{
plan.End();
}
}
