Package org.apache.druid.query.rowsandcols.semantic

Interface RowsAndColumnsDecorator

All Known Implementing Classes:

DefaultRowsAndColumnsDecorator

public interface RowsAndColumnsDecorator

An interface for "decorating" a rowsAndColumns. This basically takes extra metadata that impacts the shape of the RowsAndColumns. Generally speaking, all of the void methods on this interface should cause the RowsAndColumns object to act as if it has been mutated with that decoration already. That is, whether an implementation is lazy or not should not impact what is visible/not visible. After all decoration methods have been called, either restrictColumns(List) or toRowsAndColumns() can be called to generate a RowsAndColumns with the decorations applied. Note, that it is generally expected that implementations will choose to lazily apply the decorations and not actually materialize them until the last possible moment, but this is an implementation detail left up to the specific implementation.

Method Summary

Modifier and Type	Method	Description
void	addFilter(Filter filter)
void	addVirtualColumns(VirtualColumns virtualColumn)
static RowsAndColumnsDecorator	fromRAC(RowsAndColumns rac)
void	limitTimeRange(org.joda.time.Interval interval)
RowsAndColumns	restrictColumns(List<String> columns)
void	setOffsetLimit(OffsetLimit offsetLimit)
void	setOrdering(List<ColumnWithDirection> ordering)
RowsAndColumns	toRowsAndColumns()

Method Details

fromRAC

static RowsAndColumnsDecorator fromRAC(RowsAndColumns rac)

limitTimeRange

void limitTimeRange(org.joda.time.Interval interval)

addFilter

void addFilter(Filter filter)

addVirtualColumns

void addVirtualColumns(VirtualColumns virtualColumn)

setOffsetLimit

void setOffsetLimit(OffsetLimit offsetLimit)

setOrdering

void setOrdering(List<ColumnWithDirection> ordering)

restrictColumns

RowsAndColumns restrictColumns(List<String> columns)

toRowsAndColumns

RowsAndColumns toRowsAndColumns()