Package org.apache.iotdb.db.protocol.influxdb.handler

Class AbstractQueryHandler

java.lang.Object

org.apache.iotdb.db.protocol.influxdb.handler.AbstractQueryHandler

Direct Known Subclasses:

NewQueryHandler, QueryHandler

public abstract class AbstractQueryHandler
extends java.lang.Object

Constructor Summary

Constructors

Constructor	Description
AbstractQueryHandler()

Method Summary

Modifier and Type	Method	Description
boolean	canMergeOperator(FilterOperator operator)	judge whether the subtrees of the syntax tree have or operations.
void	checkInfluxDBQueryOperator(Operator operator)
java.util.List<org.apache.iotdb.tsfile.read.expression.IExpression>	getIExpressionByFilterOperatorOperator(FilterOperator filterOperator)	generate query conditions through the syntax tree (if you enter this function, it means that it must be a syntax tree that can be merged, and there is no or)
org.apache.iotdb.tsfile.read.expression.IExpression	getIExpressionForBasicFunctionOperator(BasicFunctionOperator basicFunctionOperator)	conditions are generated from subtrees of unique conditions
void	ProcessSelectComponent(org.influxdb.dto.QueryResult queryResult, InfluxSelectComponent selectComponent)	further process the obtained query result through the query criteria of select
org.influxdb.dto.QueryResult	queryExpr(FilterOperator operator, java.lang.String database, java.lang.String measurement, ServiceProvider serviceProvider, java.util.Map<java.lang.String,java.lang.Integer> fieldOrders, java.lang.Long sessionId)
org.influxdb.dto.QueryResult	queryFuncWithoutFilter(InfluxSelectComponent selectComponent, java.lang.String database, java.lang.String measurement, ServiceProvider serviceProvider, long sessionid)	Query the select result.
org.apache.iotdb.protocol.influxdb.rpc.thrift.InfluxQueryResultRsp	queryInfluxDB(java.lang.String database, InfluxQueryOperator queryOperator, long sessionId, ServiceProvider serviceProvider)

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractQueryHandler

public AbstractQueryHandler()

Method Detail

queryInfluxDB

public final org.apache.iotdb.protocol.influxdb.rpc.thrift.InfluxQueryResultRsp queryInfluxDB(java.lang.String database,
                                                                                              InfluxQueryOperator queryOperator,
                                                                                              long sessionId,
                                                                                              ServiceProvider serviceProvider)

getIExpressionForBasicFunctionOperator

public org.apache.iotdb.tsfile.read.expression.IExpression getIExpressionForBasicFunctionOperator(BasicFunctionOperator basicFunctionOperator)

conditions are generated from subtrees of unique conditions

Parameters:

basicFunctionOperator - subtree to generate condition

Returns:

corresponding conditions

ProcessSelectComponent

public void ProcessSelectComponent(org.influxdb.dto.QueryResult queryResult,
                                   InfluxSelectComponent selectComponent)

further process the obtained query result through the query criteria of select

Parameters:

queryResult - query results to be processed

selectComponent - select conditions to be filtered

queryFuncWithoutFilter

public final org.influxdb.dto.QueryResult queryFuncWithoutFilter(InfluxSelectComponent selectComponent,
                                                                 java.lang.String database,
                                                                 java.lang.String measurement,
                                                                 ServiceProvider serviceProvider,
                                                                 long sessionid)

Query the select result. By default, there are no filter conditions. The functions to be queried use the built-in iotdb functions

Parameters:

selectComponent - select data to query

Returns:

select query result

queryExpr

public org.influxdb.dto.QueryResult queryExpr(FilterOperator operator,
                                              java.lang.String database,
                                              java.lang.String measurement,
                                              ServiceProvider serviceProvider,
                                              java.util.Map<java.lang.String,java.lang.Integer> fieldOrders,
                                              java.lang.Long sessionId)
                                       throws org.apache.iotdb.commons.auth.AuthException

Throws:

org.apache.iotdb.commons.auth.AuthException

getIExpressionByFilterOperatorOperator

public java.util.List<org.apache.iotdb.tsfile.read.expression.IExpression> getIExpressionByFilterOperatorOperator(FilterOperator filterOperator)

generate query conditions through the syntax tree (if you enter this function, it means that it must be a syntax tree that can be merged, and there is no or)

Parameters:

filterOperator - the syntax tree of query criteria needs to be generated

Returns:

condition list

canMergeOperator

public boolean canMergeOperator(FilterOperator operator)

judge whether the subtrees of the syntax tree have or operations. If not, the query can be merged

Parameters:

operator - subtree to judge

Returns:

can merge queries

checkInfluxDBQueryOperator

public void checkInfluxDBQueryOperator(Operator operator)