DimensionMergerV9 (druid-processing 28.0.0 API)

All Superinterfaces:

DimensionMerger

All Known Implementing Classes:

AutoTypeColumnMerger, DictionaryEncodedColumnMerger, DoubleDimensionMergerV9, FloatDimensionMergerV9, LongDimensionMergerV9, NestedDataColumnMergerV4, NumericDimensionMergerV9, StringDimensionMergerV9
```
public interface DimensionMergerV9
extends DimensionMerger
```
Processing related interface DimensionMerger subclass to be used with IndexMergerV9.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`ColumnDescriptor`	`makeColumnDescriptor()`	Return a ColumnDescriptor containing ColumnPartSerde objects appropriate for this DimensionMerger's value metadata, sequence of row values, and index structures.

Methods inherited from interface org.apache.druid.segment.DimensionMerger
convertSortedSegmentRowValuesToMergedRowValues, hasOnlyNulls, processMergedRow, writeIndexes, writeMergedValueDictionary

- Method Detail
  - makeColumnDescriptor
```
ColumnDescriptor makeColumnDescriptor()
```
    Return a ColumnDescriptor containing ColumnPartSerde objects appropriate for this DimensionMerger's value metadata, sequence of row values, and index structures.
    
    Returns:
    
    ColumnDescriptor that IndexMergerV9 will use to build a column.