49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
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/**
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* @file mix_cc/sql/condition.h
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* @brief 查询条件
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* @author Cat (null.null.null@qq.com)
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* @version 0.1
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* @date 2021-07-10
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*
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* Company: Baosight Co. Ltd.
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* DO NOT COPY/USE WITHOUT PERMISSION
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*
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*/
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#pragma once
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#include <mix_cc/sql/public.h>
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#include <mix_cc/sql/op/compare.h>
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#include <string>
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namespace mix_cc {
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namespace sql {
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template <typename Name, typename Comp, typename Tp>
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struct condition_t {
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using comp_t = Comp;
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using value_type = Tp;
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private:
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Name col_name_;
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Comp comp_;
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value_type value_;
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public:
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constexpr condition_t(Name col, Comp comp, value_type value)
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: col_name_(col), comp_(comp), value_(value) {}
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~condition_t() {}
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constexpr auto get_str() {
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std::string value_str;
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if constexpr (std::is_integral_v<value_type> ||
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std::is_floating_point_v<value_type>) {
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value_str = boost::str(boost::format("%1%") % value_);
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} else {
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value_str = boost::str(boost::format("%2%%1%%2%") % value_ % '\'');
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}
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return std::string(col_name_.c_str()) + " " + comp_.c_str() + " " +
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value_str;
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}
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};
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} // namespace sql
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} // namespace mix_cc
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