OoOJoin::MultiThreadHashTable Class Reference

The multithread-supported hash table, holding buckets. More...

Collaboration diagram for OoOJoin::MultiThreadHashTable:

Public Member Functions
	MultiThreadHashTable (size_t bks)
	pre-init with several buckets More...
void	buildTable (NPJTuplePtr *tps, size_t len)
	build the hashtable from tuple memory aray More...
size_t	probeTuple (NPJTuplePtr tp)
	probe one tuple More...

Public Attributes
keyType	hash_mask
keyType	skip_bits
std::vector< MtBucket >	buckets

Detailed Description

The multithread-supported hash table, holding buckets.

Todo:

Improve the efficiency of build phase

Constructor & Destructor Documentation

MultiThreadHashTable()

MultiThreadHashTable::MultiThreadHashTable

(

size_t

bks

)

pre-init with several buckets

Parameters

bks	the number of buckets

Member Function Documentation

buildTable()

void MultiThreadHashTable::buildTable	(	NPJTuplePtr *	tps,
		size_t	len
	)

build the hashtable from tuple memory aray

Parameters

tps	the tuple aray
len	the length

Note

This is thread-safe

Warning

This function with pointer is NOT intended for API, but only inline use

probeTuple()

size_t MultiThreadHashTable::probeTuple

(

NPJTuplePtr

tp

)

probe one tuple

Parameters

tp

Tge tuple

Returns

Number of matches

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The documentation for this class was generated from the following files:

• include/JoinAlgos/NPJ/MultiThreadHashTable.h
• src/JoinAlgos/NPJ/MultiThreadHashTable.cpp