org.apache.druid.query.groupby

Class ResultRow

java.lang.Object

org.apache.druid.query.groupby.ResultRow

public final class ResultRow
extends Object

Used by GroupByQuery for results. Each row is positional, and has the following fields, in order: - Timestamp (optional; only if granularity != ALL) - Dimensions (in order) - Aggregators (in order) - Post-aggregators (optional; in order, if present) ResultRows may sometimes be created without space reserved for post-aggregators, in contexts where it is known that post-aggregators will not be computed.

See Also:

GroupByQuery.getResultRowSignature(), GroupByQuery.getResultRowHasTimestamp(), GroupByQuery.getUniversalTimestamp(), GroupByQuery.getResultRowDimensionStart(), GroupByQuery.getResultRowAggregatorStart(), GroupByQuery.getResultRowPostAggregatorStart(), GroupByQuery.getResultRowSizeWithPostAggregators(), GroupByQuery.getResultRowSizeWithoutPostAggregators()

Method Summary

Modifier and Type	Method and Description
ResultRow	copy() Returns a copy of this row.
static ResultRow	create(int size) Create a row of a certain size, initialized to all nulls.
boolean	equals(Object o)
static ResultRow	fromLegacyRow(Row row, GroupByQuery query) Create a row based on a legacy Row that was generated by a given GroupByQuery.
Object	get(int i)
Object[]	getArray() Get the backing array for this row (not a copy).
long	getLong(int i)
int	hashCode()
int	length()
static ResultRow	of(Object... row) Create a row from an array of objects.
void	set(int i, Object o)
Map<String,Object>	toMap(GroupByQuery query) Returns a Map representation of the data in this row.
MapBasedRow	toMapBasedRow(GroupByQuery query) Returns a Row representation of the data in this row.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

of

public static ResultRow of(Object... row)

Create a row from an array of objects.

create

public static ResultRow create(int size)

Create a row of a certain size, initialized to all nulls.

fromLegacyRow

public static ResultRow fromLegacyRow(Row row,
                                      GroupByQuery query)

Create a row based on a legacy Row that was generated by a given GroupByQuery. This is useful for deserializing rows that have come off the wire in the older format. (In the past, GroupBy query results were sequences of Row, not ResultRow.)

Parameters:

row - legacy row

query - query corresponding to the output ResultRow

getArray

public Object[] getArray()

Get the backing array for this row (not a copy).

set

public void set(int i,
                @Nullable
                Object o)

get

@Nullable
public Object get(int i)

getLong

public long getLong(int i)

length

public int length()

copy

public ResultRow copy()

Returns a copy of this row. The backing array will be copied as well.

toMap

public Map<String,Object> toMap(GroupByQuery query)

Returns a Map representation of the data in this row. Does not include the timestamp.

toMapBasedRow

public MapBasedRow toMapBasedRow(GroupByQuery query)

Returns a Row representation of the data in this row.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object