Package org.apache.iotdb.db.mpp.plan

Class Coordinator

java.lang.Object

org.apache.iotdb.db.mpp.plan.Coordinator

public class Coordinator
extends java.lang.Object

The coordinator for MPP. It manages all the queries which are executed in current Node. And it will be responsible for the lifecycle of a query. A query request will be represented as a QueryExecution.

Method Summary

Modifier and Type	Method	Description
QueryId	createQueryId()
ExecutionResult	execute(Statement statement, long queryId, SessionInfo session, java.lang.String sql, IPartitionFetcher partitionFetcher, ISchemaFetcher schemaFetcher)	This method is called by the write method.
ExecutionResult	execute(Statement statement, long queryId, SessionInfo session, java.lang.String sql, IPartitionFetcher partitionFetcher, ISchemaFetcher schemaFetcher, long timeOut)
static Coordinator	getInstance()
IQueryExecution	getQueryExecution(java.lang.Long queryId)
void	removeQueryExecution(java.lang.Long queryId)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

execute

public ExecutionResult execute(Statement statement,
                               long queryId,
                               SessionInfo session,
                               java.lang.String sql,
                               IPartitionFetcher partitionFetcher,
                               ISchemaFetcher schemaFetcher,
                               long timeOut)

execute

public ExecutionResult execute(Statement statement,
                               long queryId,
                               SessionInfo session,
                               java.lang.String sql,
                               IPartitionFetcher partitionFetcher,
                               ISchemaFetcher schemaFetcher)

This method is called by the write method. So it does not set the timeout parameter.

getQueryExecution

public IQueryExecution getQueryExecution(java.lang.Long queryId)

removeQueryExecution

public void removeQueryExecution(java.lang.Long queryId)

createQueryId

public QueryId createQueryId()

getInstance

public static Coordinator getInstance()