程序包 org.apache.iotdb.db.protocol.influxdb.handler

类 AbstractQueryHandler

java.lang.Object

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

直接已知子类:

NewQueryHandler

public abstract class AbstractQueryHandler
extends java.lang.Object

Used to process influxdb query requests, this abstract class defines some template methods

构造器概要

构造器

构造器	说明
AbstractQueryHandler()

方法概要

修饰符和类型	方法	说明
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	queryByConditions(java.util.List<org.apache.iotdb.tsfile.read.expression.IExpression> expressions, java.lang.String database, java.lang.String measurement, java.util.Map<java.lang.String,java.lang.Integer> fieldOrders, java.lang.Long sessionId)	get query results in the format of influxdb through conditions
org.influxdb.dto.QueryResult	queryExpr(FilterOperator operator, java.lang.String database, java.lang.String measurement, 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, long sessionid)	Query the select result.
org.apache.iotdb.protocol.influxdb.rpc.thrift.InfluxQueryResultRsp	queryInfluxDB(java.lang.String database, InfluxQueryOperator queryOperator, long sessionId)

从类继承的方法 java.lang.Object

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

构造器详细资料

AbstractQueryHandler

public AbstractQueryHandler()

方法详细资料

queryInfluxDB

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

getIExpressionForBasicFunctionOperator

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

conditions are generated from subtrees of unique conditions

参数:

basicFunctionOperator - subtree to generate condition

返回:

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

参数:

queryResult - query results to be processed

selectComponent - select conditions to be filtered

queryFuncWithoutFilter

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

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

参数:

selectComponent - select data to query

返回:

select query result

queryExpr

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

抛出:

org.apache.iotdb.commons.auth.AuthException

queryByConditions

public org.influxdb.dto.QueryResult queryByConditions(java.util.List<org.apache.iotdb.tsfile.read.expression.IExpression> expressions,
                                                      java.lang.String database,
                                                      java.lang.String measurement,
                                                      java.util.Map<java.lang.String,java.lang.Integer> fieldOrders,
                                                      java.lang.Long sessionId)
                                               throws org.apache.iotdb.commons.auth.AuthException

get query results in the format of influxdb through conditions

参数:

expressions - list of conditions, including tag and field condition

返回:

returns the results of the influxdb query

抛出:

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)

参数:

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

返回:

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

参数:

operator - subtree to judge

返回:

can merge queries

checkInfluxDBQueryOperator

public void checkInfluxDBQueryOperator(Operator operator)