mergeLeftJoin - 2023.2 English

#include "xf_database/merge_left_join.hpp"

template <
    typename KEY_T,
    typename LEFT_FIELD_T,
    typename RIGHT_FIELD_T
    >
void mergeLeftJoin (
    bool isascend,
    hls::stream <KEY_T>& left_strm_in_key,
    hls::stream <LEFT_FIELD_T>& left_strm_in_field,
    hls::stream <bool>& left_e_strm,
    hls::stream <KEY_T>& right_strm_in_key,
    hls::stream <RIGHT_FIELD_T>& right_strm_in_field,
    hls::stream <bool>& right_e_strm,
    hls::stream <KEY_T>& left_strm_out_key,
    hls::stream <LEFT_FIELD_T>& left_strm_out_field,
    hls::stream <KEY_T>& right_strm_out_key,
    hls::stream <RIGHT_FIELD_T>& right_strm_out_field,
    hls::stream <bool>& out_e_strm,
    hls::stream <bool>& isnull_strm
    )

merge left join function for sorted table, left table should not have duplicated keys.

Parameters:

KEY_T	the type of the key
LEFT_FIELD_T	the type of the field of left table
RIGHT_FIELD_T	the type of the field of right table
isascend	flag to show if the input tables are ascend tables
left_strm_in_key	the key stream of the left input table
left_strm_in_field	the field stream of the left input table
left_e_strm	the end flag stream to mark the end of left input table
right_strm_in_key	the key stream of the right input table
right_strm_in_field	the field stream of the right input table
right_e_strm	the end flag stream to mark the end of right input table
left_strm_out_key	the output key stream of left table
left_strm_out_field	the output field stream of left table
right_strm_out_key	the output key stream of right table
right_strm_out_field	the output field stream of right
out_e_strm	the end flag stream to mark the end of out table
isnull_strm	the isnull stream to show if the result right table is null.