class xf::database::gqe::JoinConfig

#include "gqe_join_config.hpp"

Overview

class JoinConfig: protected xf::database::gqe::BaseConfig

Methods

JoinConfig

JoinConfig (
    Table a,
    std::string filter_a,
    Table b,
    std::string filter_b,
    std::string join_str,
    Table c,
    std::string output_str,
    int join_Type = INNER_JOIN
    )

constructor of JoinConfig .

The class generates join configure bits by parsing the join .run() arguments,

Parameters:

a	left table
filter_a	filter condition of left table
b	right table
filter_b	filter condition of right table
join_str	join condition(s)
evals	eval expressions list
evals_const	eval expression constant list
c	result table
output_str	output column mapping
join_type	INNER_JOIN(default) | SEMI_JOIN | ANTI_JOIN.
part_tag	if use partition kernel

getJoinConfigBits

ap_uint <512>* getJoinConfigBits () const

get the gqeJoin kernel config

Returns:

join config bits

getShuffleScan

std::vector <std::vector <int8_t>> getShuffleScan () const

get the sw-shuffle config for scan.

Returns:

return the scan sw_shuffle cfg

getShuffleWrite

std::vector <int8_t> getShuffleWrite () const

get the sw-shuffle config for write out.

Returns:

return the write out sw_shuffle cfg