49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
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/**
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* @file mix_cc/sql/column.h
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* @brief 列信息
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* @author Cat (null.null.null@qq.com)
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* @version 0.1
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* @date 2021-09-17
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*
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* Copyright: 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/condition.h>
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#include <mix_cc/sql/value.h>
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namespace mix_cc {
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namespace sql {
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template <typename Tp, typename Name>
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struct column_t {
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using name_type = Name;
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using value_type = Tp;
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name_type col_name;
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constexpr auto operator<(Tp val) {
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return condition_t(col_name, op::compare_t::lt, val);
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}
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constexpr auto operator>(Tp val) {
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return condition_t(col_name, op::compare_t::gt, val);
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}
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constexpr auto operator==(Tp val) {
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return condition_t(col_name, op::compare_t::eq, val);
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}
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constexpr auto like(Tp val) {
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return condition_t(col_name, op::compare_t::like, val);
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}
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constexpr auto operator=(Tp val) { return value_t(col_name, val); }
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};
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template <typename Tp, typename Name>
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constexpr column_t<Tp, Name> make_column_c(Name&& col_name) {
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return column_t<Tp, Name>{col_name};
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}
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} // namespace sql
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} // namespace mix_cc
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