public static QueryPreProcessor GetInstance()
{
if (instance == null)
{
instance = new QueryPreProcessor();
}
return(instance);
}
public static QueryProjector GetInstance()
{
if (instance == null)
{
instance = new QueryProjector();
instance.queryPreProcessor = QueryPreProcessor.GetInstance();
instance.queryResult = QueryResult.GetInstance();
instance.astManager = AstManager.GetInstance();
instance.queryEvaluator = QueryEvaluator.GetInstance();
}
return(instance);
}
