Package com.influxdb.query.dsl

Class VariableAssignment

java.lang.Object

com.influxdb.query.dsl.Flux

com.influxdb.query.dsl.VariableAssignment

All Implemented Interfaces:

Expression, HasImports, IsVariableAssignment

Direct Known Subclasses:

AbstractFunctionFlux

public class VariableAssignment
extends Flux
implements IsVariableAssignment

Hold the variable name and expression of an assignment.

Example

 VariableAssignment a = Flux.from("test1").asVariable("a");
 VariableAssignment b = Flux.from("test2").asVariable("b");

 String flux = new Expressions(
    a,
    b,
    a.first().yield("firstA"),
    b.first().yield("firstB"),
    a.last().yield("lastA"),
    b.last().yield("lastB")
 ).toString();
 

See Also:

• Expressions
• Flux.asVariable(String)
• AbstractFunctionFlux

Field Summary

Fields

Modifier and Type	Field	Description
protected final Expression	expression
protected final String	name

Fields inherited from class com.influxdb.query.dsl.Flux

functionsParameters, imports

Constructor Summary

Constructors

Constructor	Description
VariableAssignment(String name, Expression expression)

Method Summary

Modifier and Type	Method	Description
void	appendActual(Map<String,Object> parameters, StringBuilder builder)	Append actual Flux function to Flux query.
Set<String>	getImports()
String	getVariableName()
String	toString(Map<String,Object> parameters, boolean prependImports)

Methods inherited from class com.influxdb.query.dsl.Flux

addImport, aggregateWindow, aggregateWindow, arrayFrom, arrayFrom, asVariable, collectImports, columns, columns, count, count, covariance, covariance, covariance, covariance, covariance, covariance, covariance, covariance, covariance, cumulativeSum, cumulativeSum, cumulativeSum, derivative, derivative, difference, difference, difference, difference, difference, difference, distinct, distinct, drop, drop, drop, drop, duplicate, duplicate, elapsed, elapsed, elapsed, elapsed, expression, fill, fill, filter, filter, first, from, from, from, function, group, groupBy, groupBy, groupBy, groupExcept, groupExcept, groupExcept, integral, integral, interpolateLinear, interpolateLinear, join, join, keep, keep, keep, keep, last, last, limit, limit, limit, map, map, max, max, mean, mean, min, min, pivot, pivot, pivot, quantile, quantile, quantile, quantile, quantile, range, range, range, range, range, range, range, reduce, reduce, rename, rename, rename, sample, sample, sample, set, set, skew, skew, sort, sort, sort, sort, sort, sort, spread, spread, stddev, stddev, sum, sum, tail, tail, tail, timeShift, timeShift, timeShift, timeShift, to, to, to, to, to, to, to, to, toBool, toDuration, toFloat, toInt, toString, toString, toStringConvert, toTime, toUInt, truncateTimeColumn, union, window, window, window, window, window, window, window, withFunction, withFunctionNamed, withPipedFunction, withPropertyNamed, withPropertyNamed, withPropertyValue, withPropertyValue, withPropertyValueEscaped, yield, yield

Methods inherited from class java.lang.Object

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

Field Details

name

@Nonnull
protected final String name

expression

@Nonnull
protected final Expression expression

Constructor Details

VariableAssignment

public VariableAssignment(@Nonnull
 String name,
 @Nonnull
 Expression expression)

Parameters:

name - the name of teh variable

expression - the expression to assign to the variable

Method Details

getVariableName

@Nonnull
public String getVariableName()

Specified by:

getVariableName in interface IsVariableAssignment

Returns:

the name of the variable

appendActual

public void appendActual(@Nonnull
 Map<String,Object> parameters,
 @Nonnull
 StringBuilder builder)

Description copied from class: Flux

Append actual Flux function to Flux query.

Specified by:

appendActual in class Flux

Parameters:

parameters - named parameters for Flux query

builder - Flux query chaing

toString

public String toString(@Nonnull
 Map<String,Object> parameters,
 boolean prependImports)

Specified by:

toString in interface Expression

Overrides:

toString in class Flux

Parameters:

parameters - parameters to resolve

prependImports - true, if the imports should be prepended

Returns:

the string representation of the expression

getImports

public Set<String> getImports()

Specified by:

getImports in interface HasImports

Overrides:

getImports in class Flux

Returns:

all used imports of this flux