org.apache.hadoop.hive.ql.optimizer.listbucketingpruner
Class ListBucketingPrunerUtils

java.lang.Object
  org.apache.hadoop.hive.ql.optimizer.listbucketingpruner.ListBucketingPrunerUtils

public final class ListBucketingPrunerUtils
extends Object

Utility for list bucketing prune.

Field Summary

static String	HIVE_LIST_BUCKETING_DEFAULT_DIR_NAME
static String	HIVE_LIST_BUCKETING_DEFAULT_KEY

Constructor Summary

ListBucketingPrunerUtils()

Method Summary

static Boolean	andBoolOperand(Boolean o, Boolean a) And 2 Boolean operands in the context of pruning match Operand one|Operand another | And result unknown | T | unknown unknown | F | F unknown | unknown | unknown T | T | T T | F | F T | unknown | unknown F | T | F F | F | F F | unknown | F
static boolean	isListBucketingPart(Partition part) check if the partition is list bucketing
static Boolean	notBoolOperand(Boolean input) Not a Boolean operand in the context of pruning match Operand | Not T | F F | T unknown | unknown
static Boolean	orBoolOperand(Boolean o, Boolean a) or 2 Boolean operands in the context of pruning match Operand one|Operand another | or result unknown | T | T unknown | F | unknown unknown | unknown | unknown T | T | T T | F | T T | unknown | unknown F | T | T F | F | F F | unknown | unknown
static boolean	skipSkewedDirectory(Boolean bool) Decide if pruner skips the skewed directory Input: if the skewed value matches the expression tree Ouput: if pruner should skip the directory represented by the skewed value If match result is unknown(null) or true, pruner doesn't skip the directory If match result is false, pruner skips the dir.

Methods inherited from class java.lang.Object

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

Field Detail

HIVE_LIST_BUCKETING_DEFAULT_DIR_NAME

public static String HIVE_LIST_BUCKETING_DEFAULT_DIR_NAME

HIVE_LIST_BUCKETING_DEFAULT_KEY

public static String HIVE_LIST_BUCKETING_DEFAULT_KEY

Constructor Detail

ListBucketingPrunerUtils

public ListBucketingPrunerUtils()

Method Detail

skipSkewedDirectory

public static boolean skipSkewedDirectory(Boolean bool)

Decide if pruner skips the skewed directory Input: if the skewed value matches the expression tree Ouput: if pruner should skip the directory represented by the skewed value If match result is unknown(null) or true, pruner doesn't skip the directory If match result is false, pruner skips the dir.

Parameters:

bool - if the skewed value matches the expression tree

Returns:

orBoolOperand

public static Boolean orBoolOperand(Boolean o,
                                    Boolean a)

or 2 Boolean operands in the context of pruning match Operand one|Operand another | or result unknown | T | T unknown | F | unknown unknown | unknown | unknown T | T | T T | F | T T | unknown | unknown F | T | T F | F | F F | unknown | unknown

andBoolOperand

public static Boolean andBoolOperand(Boolean o,
                                     Boolean a)

And 2 Boolean operands in the context of pruning match Operand one|Operand another | And result unknown | T | unknown unknown | F | F unknown | unknown | unknown T | T | T T | F | F T | unknown | unknown F | T | F F | F | F F | unknown | F

Parameters:

o - one operand

a - another operand

Returns:

result

notBoolOperand

public static Boolean notBoolOperand(Boolean input)

Not a Boolean operand in the context of pruning match Operand | Not T | F F | T unknown | unknown

Parameters:

input - match result

Returns:

isListBucketingPart

public static boolean isListBucketingPart(Partition part)

check if the partition is list bucketing

Parameters:

part -

Returns: