io.prestosql.operator

Class SimplePagesHashStrategy

java.lang.Object

io.prestosql.operator.SimplePagesHashStrategy

All Implemented Interfaces:

PagesHashStrategy

public class SimplePagesHashStrategy
extends Object
implements PagesHashStrategy

Constructor Summary

Constructors

Constructor and Description
SimplePagesHashStrategy(List<Type> types, List<Integer> outputChannels, List<List<Block>> channels, List<Integer> hashChannels, OptionalInt precomputedHashChannel, Optional<Integer> sortChannel, FunctionRegistry functionRegistry, boolean groupByUsesEqualTo)

Method Summary

Modifier and Type	Method and Description
void	appendTo(int blockIndex, int position, PageBuilder pageBuilder, int outputChannelOffset) Appends all values at the specified position to the page builder starting at outputChannelOffset.
int	compareSortChannelPositions(int leftBlockIndex, int leftBlockPosition, int rightBlockIndex, int rightBlockPosition) Compares sort channel (if applicable) values at the specified positions.
int	getChannelCount() Gets the number of columns appended by this PagesHashStrategy.
long	getSizeInBytes() Get the total of allocated size
long	hashPosition(int blockIndex, int position) Calculates the hash code the hashed columns in this PagesHashStrategy at the specified position.
long	hashRow(int position, Page page) Calculates the hash code at position in page.
boolean	isPositionNull(int blockIndex, int blockPosition) Checks if any of the hashed columns is null
boolean	isSortChannelPositionNull(int blockIndex, int blockPosition) Checks if sort channel is null at the specified position
boolean	positionEqualsPosition(int leftBlockIndex, int leftPosition, int rightBlockIndex, int rightPosition) Compares the hashed columns in this PagesHashStrategy at the specified positions.
boolean	positionEqualsPositionIgnoreNulls(int leftBlockIndex, int leftPosition, int rightBlockIndex, int rightPosition) Compares the hashed columns in this PagesHashStrategy at the specified positions.
boolean	positionEqualsRow(int leftBlockIndex, int leftPosition, int rightPosition, Page rightPage) Compares the hashed columns in this PagesHashStrategy to the values in the specified page.
boolean	positionEqualsRow(int leftBlockIndex, int leftPosition, int rightPosition, Page page, int[] rightHashChannels) Compares the hashed columns in this PagesHashStrategy to the hashed columns in the Page.
boolean	positionEqualsRowIgnoreNulls(int leftBlockIndex, int leftPosition, int rightPosition, Page rightPage) Compares the hashed columns in this PagesHashStrategy to the values in the specified page.
boolean	positionNotDistinctFromRow(int leftBlockIndex, int leftPosition, int rightPosition, Page page, int[] rightChannels) Compares the hashed columns in this PagesHashStrategy to the hashed columns in the Page.
boolean	rowEqualsRow(int leftPosition, Page leftPage, int rightPosition, Page rightPage) Compares the values in the specified pages.

Methods inherited from class java.lang.Object

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

Constructor Detail

SimplePagesHashStrategy

public SimplePagesHashStrategy(List<Type> types,
                               List<Integer> outputChannels,
                               List<List<Block>> channels,
                               List<Integer> hashChannels,
                               OptionalInt precomputedHashChannel,
                               Optional<Integer> sortChannel,
                               FunctionRegistry functionRegistry,
                               boolean groupByUsesEqualTo)

Method Detail

getChannelCount

public int getChannelCount()

Description copied from interface: PagesHashStrategy

Gets the number of columns appended by this PagesHashStrategy.

Specified by:

getChannelCount in interface PagesHashStrategy

getSizeInBytes

public long getSizeInBytes()

Description copied from interface: PagesHashStrategy

Get the total of allocated size

Specified by:

getSizeInBytes in interface PagesHashStrategy

appendTo

public void appendTo(int blockIndex,
                     int position,
                     PageBuilder pageBuilder,
                     int outputChannelOffset)

Description copied from interface: PagesHashStrategy

Appends all values at the specified position to the page builder starting at outputChannelOffset.

Specified by:

appendTo in interface PagesHashStrategy

hashPosition

public long hashPosition(int blockIndex,
                         int position)

Description copied from interface: PagesHashStrategy

Calculates the hash code the hashed columns in this PagesHashStrategy at the specified position.

Specified by:

hashPosition in interface PagesHashStrategy

hashRow

public long hashRow(int position,
                    Page page)

Description copied from interface: PagesHashStrategy

Calculates the hash code at position in page. Page must have the same number of Blocks as the hashed columns and each entry is expected to be the same type.

Specified by:

hashRow in interface PagesHashStrategy

rowEqualsRow

public boolean rowEqualsRow(int leftPosition,
                            Page leftPage,
                            int rightPosition,
                            Page rightPage)

Description copied from interface: PagesHashStrategy

Compares the values in the specified pages. The values are compared positionally, so leftPage and rightPage must have the same number of entries as the hashed columns and each entry is expected to be the same type.

Specified by:

rowEqualsRow in interface PagesHashStrategy

positionEqualsRow

public boolean positionEqualsRow(int leftBlockIndex,
                                 int leftPosition,
                                 int rightPosition,
                                 Page rightPage)

Description copied from interface: PagesHashStrategy

Compares the hashed columns in this PagesHashStrategy to the values in the specified page. The values are compared positionally, so rightPage must have the same number of entries as the hashed columns and each entry is expected to be the same type. rightPage is used if join uses filter function and must contain all columns from probe side of join.

Specified by:

positionEqualsRow in interface PagesHashStrategy

positionEqualsRowIgnoreNulls

public boolean positionEqualsRowIgnoreNulls(int leftBlockIndex,
                                            int leftPosition,
                                            int rightPosition,
                                            Page rightPage)

Description copied from interface: PagesHashStrategy

Compares the hashed columns in this PagesHashStrategy to the values in the specified page. The values are compared positionally, so rightPage must have the same number of entries as the hashed columns and each entry is expected to be the same type. rightPage is used if join uses filter function and must contain all columns from probe side of join.

This method does not perform any null checks.

Specified by:

positionEqualsRowIgnoreNulls in interface PagesHashStrategy

positionEqualsRow

public boolean positionEqualsRow(int leftBlockIndex,
                                 int leftPosition,
                                 int rightPosition,
                                 Page page,
                                 int[] rightHashChannels)

Description copied from interface: PagesHashStrategy

Compares the hashed columns in this PagesHashStrategy to the hashed columns in the Page. The values are compared positionally, so rightChannels must have the same number of entries as the hashed columns and each entry is expected to be the same type.

Specified by:

positionEqualsRow in interface PagesHashStrategy

positionNotDistinctFromRow

public boolean positionNotDistinctFromRow(int leftBlockIndex,
                                          int leftPosition,
                                          int rightPosition,
                                          Page page,
                                          int[] rightChannels)

Description copied from interface: PagesHashStrategy

Compares the hashed columns in this PagesHashStrategy to the hashed columns in the Page. The values are compared positionally under "not distinct from" semantics. rightChannels must have the same number of entries as the hashed columns and each entry is expected to be the same type.

Specified by:

positionNotDistinctFromRow in interface PagesHashStrategy

positionEqualsPosition

public boolean positionEqualsPosition(int leftBlockIndex,
                                      int leftPosition,
                                      int rightBlockIndex,
                                      int rightPosition)

Description copied from interface: PagesHashStrategy

Compares the hashed columns in this PagesHashStrategy at the specified positions.

Specified by:

positionEqualsPosition in interface PagesHashStrategy

positionEqualsPositionIgnoreNulls

public boolean positionEqualsPositionIgnoreNulls(int leftBlockIndex,
                                                 int leftPosition,
                                                 int rightBlockIndex,
                                                 int rightPosition)

Description copied from interface: PagesHashStrategy

Compares the hashed columns in this PagesHashStrategy at the specified positions.

This method does not perform any null checks.

Specified by:

positionEqualsPositionIgnoreNulls in interface PagesHashStrategy

isPositionNull

public boolean isPositionNull(int blockIndex,
                              int blockPosition)

Description copied from interface: PagesHashStrategy

Checks if any of the hashed columns is null

Specified by:

isPositionNull in interface PagesHashStrategy

compareSortChannelPositions

public int compareSortChannelPositions(int leftBlockIndex,
                                       int leftBlockPosition,
                                       int rightBlockIndex,
                                       int rightBlockPosition)

Description copied from interface: PagesHashStrategy

Compares sort channel (if applicable) values at the specified positions.

Specified by:

compareSortChannelPositions in interface PagesHashStrategy

isSortChannelPositionNull

public boolean isSortChannelPositionNull(int blockIndex,
                                         int blockPosition)

Description copied from interface: PagesHashStrategy

Checks if sort channel is null at the specified position

Specified by:

isSortChannelPositionNull in interface PagesHashStrategy