Projections.ProjectionMatchBuilder (druid-processing 32.0.0 API)

java.lang.Object
- org.apache.druid.segment.projections.Projections.ProjectionMatchBuilder

Enclosing class:: Projections

public static final class Projections.ProjectionMatchBuilder
extends Object

Constructor Summary

Constructors
Constructor Description

ProjectionMatchBuilder()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Projections.ProjectionMatchBuilder`	`addPreAggregatedAggregator(AggregatorFactory aggregator)`	Add a query `AggregatorFactory.substituteCombiningFactory(AggregatorFactory)` which can combine the inputs of a selector created by a projection `AggregatorFactory`
`Projections.ProjectionMatchBuilder`	`addReferencedPhysicalColumn(String column)`	Add a projection physical column, which will later be added to `Projections.ProjectionMatch.getCursorBuildSpec()` if the projection matches
`Projections.ProjectionMatchBuilder`	`addReferenceedVirtualColumn(VirtualColumn virtualColumn)`	Add a query virtual column that can use projection physical columns as inputs to the match builder, which will later be added to `Projections.ProjectionMatch.getCursorBuildSpec()` if the projection matches
`Projections.ProjectionMatch`	`build(CursorBuildSpec queryCursorBuildSpec)`
`Projections.ProjectionMatchBuilder`	`remapColumn(String queryColumn, String projectionColumn)`	Map a query column name to a projection column name

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ProjectionMatchBuilder
```
public ProjectionMatchBuilder()
```
- Method Detail
  - remapColumn
```
public Projections.ProjectionMatchBuilder remapColumn(String queryColumn,
                                                      String projectionColumn)
```
    Map a query column name to a projection column name
  - addReferencedPhysicalColumn
```
public Projections.ProjectionMatchBuilder addReferencedPhysicalColumn(String column)
```
    Add a projection physical column, which will later be added to Projections.ProjectionMatch.getCursorBuildSpec() if the projection matches
  - addReferenceedVirtualColumn
```
public Projections.ProjectionMatchBuilder addReferenceedVirtualColumn(VirtualColumn virtualColumn)
```
    Add a query virtual column that can use projection physical columns as inputs to the match builder, which will later be added to Projections.ProjectionMatch.getCursorBuildSpec() if the projection matches
  - addPreAggregatedAggregator
```
public Projections.ProjectionMatchBuilder addPreAggregatedAggregator(AggregatorFactory aggregator)
```
    Add a query AggregatorFactory.substituteCombiningFactory(AggregatorFactory) which can combine the inputs of a selector created by a projection AggregatorFactory
  - build
```
public Projections.ProjectionMatch build(CursorBuildSpec queryCursorBuildSpec)
```