class xf::database::gqe::JoinStrategyManualSet¶

#include "gqe_join_strategy.hpp"

Overview¶

class JoinStrategyManualSet: public xf::database::gqe::JoinStrategyBase

Inherited Members¶

Methods¶

JoinStrategyManualSet¶

JoinStrategyManualSet (
    size_t _sol,
    size_t _sec_o,
    size_t _sec_l,
    size_t _slice_num,
    size_t _log_part,
    float _expansion_partO = 2,
    float _expansion_partL = 2,
    float _expansion_join = 1
    )

construct of JoinStrategyManualSet .

derived class of JoinStrategyBase , for set solution and parameters manually

Parameters:

sol	solution id SOL0 \| SOL1 \| SOL2.
sec_o	section number of left table
sec_l	section number of right table
slice_num	slice number of probe kernel.
log_part	log number of hash partition.
_expansion_partO	partition O output_buffer_size = _expansion_partO * input_buffer_size
_expansion_partL	partition L output_buffer_size = _expansion_partL * input_buffer_size
_expansion_join	join output_buffer_size = _expansion_join * input_buffer_size

getSolutionParams¶

virtual StrategySet getSolutionParams (
    Table tab_a,
    Table tab_b
    )

get solution id and parameters.

Parameters:

tab_a	left table
tab_b	right table