Package org.apache.ignite.internal.processors.query.stat.messages

Class StatisticsColumnData

java.lang.Object

org.apache.ignite.internal.processors.query.stat.messages.StatisticsColumnData

All Implemented Interfaces:

Serializable, Message

public class StatisticsColumnData
extends Object
implements Message

Statistics by column (or by set of columns, if they collected together)

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static short	TYPE_CODE

Fields inherited from interface org.apache.ignite.plugin.extensions.communication.Message

DIRECT_TYPE_SIZE

Constructor Summary

Constructors

Constructor	Description
StatisticsColumnData()	Default constructor.
StatisticsColumnData(StatisticsDecimalMessage min, StatisticsDecimalMessage max, long nulls, long distinct, long total, int size, byte[] rawData, long ver, long createdAt)	Constructor.

Method Summary

Modifier and Type	Method	Description
long	createdAt()
short	directType()	Gets message type.
long	distinct()
byte	fieldsCount()	Gets fields count.
StatisticsDecimalMessage	max()
StatisticsDecimalMessage	min()
long	nulls()
void	onAckReceived()	Method called when ack message received.
byte[]	rawData()
boolean	readFrom(ByteBuffer buf, MessageReader reader)	Reads this message from provided byte buffer.
int	size()
long	total()
long	version()
boolean	writeTo(ByteBuffer buf, MessageWriter writer)	Writes this message to provided byte buffer.

Methods inherited from class java.lang.Object

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

Field Detail

TYPE_CODE

public static final short TYPE_CODE

See Also:

Constant Field Values

Constructor Detail

StatisticsColumnData

public StatisticsColumnData()

Default constructor.

StatisticsColumnData

public StatisticsColumnData(StatisticsDecimalMessage min,
                            StatisticsDecimalMessage max,
                            long nulls,
                            long distinct,
                            long total,
                            int size,
                            byte[] rawData,
                            long ver,
                            long createdAt)

Constructor.

Parameters:

min - Min value in column.

max - Max value in column.

nulls - Number of null values in column.

distinct - Total distinct values in column.

total - Total values in column.

size - Average size, for variable size types (in bytes).

rawData - Raw data to make statistics aggregate.

ver - Statistics version.

createdAt - Created at time, milliseconds.

Method Detail

min

public StatisticsDecimalMessage min()

Returns:

Min value in column.

max

public StatisticsDecimalMessage max()

Returns:

Max value in column.

nulls

public long nulls()

Returns:

Number of null values in column.

distinct

public long distinct()

Returns:

Total distinct values in column.

total

public long total()

Returns:

Total values in column.

size

public int size()

Returns:

Average size, for variable size types (in bytes).

rawData

public byte[] rawData()

Returns:

Raw data.

version

public long version()

Returns:

Raw data.

createdAt

public long createdAt()

Returns:

Created at time, milliseconds.

writeTo

public boolean writeTo(ByteBuffer buf,
                       MessageWriter writer)

Writes this message to provided byte buffer.

Specified by:

writeTo in interface Message

Parameters:

buf - Byte buffer.

writer - Writer.

Returns:

Whether message was fully written.

readFrom

public boolean readFrom(ByteBuffer buf,
                        MessageReader reader)

Reads this message from provided byte buffer.

Specified by:

readFrom in interface Message

Parameters:

buf - Byte buffer.

reader - Reader.

Returns:

Whether message was fully read.

directType

public short directType()

Gets message type.

Specified by:

directType in interface Message

Returns:

Message type.

fieldsCount

public byte fieldsCount()

Gets fields count.

Specified by:

fieldsCount in interface Message

Returns:

Fields count.

onAckReceived

public void onAckReceived()

Method called when ack message received.

Specified by:

onAckReceived in interface Message