Jialin Qiao created IOTDB-495:
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Summary: Refactor Dataset and Executor in QueryEngine
Key: IOTDB-495
URL: https://issues.apache.org/jira/browse/IOTDB-495
Project: Apache IoTDB
Issue Type: Improvement
Components: Core/Engine
Reporter: Jialin Qiao
We put too much query logic in dataset, I suggest extracting query process in
query executor. The dataset is only used as a data structure.
Then, the query process is :
SQL -> Planner -> QueryPlan
QueryPlan -> Query executor -> Dataset
Fetch result -> Query executor -> Dataset
We could cache a QueryExecutor in TSServiceImpl, and get a dataset from it at
each fetch operation.
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