mirror of https://github.com/milvus-io/milvus.git
83 lines
1.6 KiB
C++
83 lines
1.6 KiB
C++
#pragma once
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#include <memory>
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#include <vector>
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#include <any>
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#include <string>
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#include <optional>
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#include "common/Schema.h"
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namespace milvus::query {
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class ExprVisitor;
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// Base of all Exprs
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struct Expr {
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public:
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virtual ~Expr() = default;
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virtual void
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accept(ExprVisitor&) = 0;
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};
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using ExprPtr = std::unique_ptr<Expr>;
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struct BinaryExpr : Expr {
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ExprPtr left_;
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ExprPtr right_;
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};
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struct UnaryExpr : Expr {
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ExprPtr child_;
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};
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// TODO: not enabled in sprint 1
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struct BoolUnaryExpr : UnaryExpr {
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enum class OpType { LogicalNot };
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OpType op_type_;
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public:
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void
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accept(ExprVisitor&) override;
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};
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// TODO: not enabled in sprint 1
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struct BoolBinaryExpr : BinaryExpr {
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enum class OpType { LogicalAnd, LogicalOr, LogicalXor };
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OpType op_type_;
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public:
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void
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accept(ExprVisitor&) override;
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};
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using FieldId = std::string;
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struct TermExpr : Expr {
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FieldId field_id_;
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DataType data_type_ = DataType::NONE;
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// std::vector<std::any> terms_;
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protected:
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// prevent accidential instantiation
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TermExpr() = default;
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public:
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void
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accept(ExprVisitor&) override;
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};
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struct RangeExpr : Expr {
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FieldId field_id_;
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DataType data_type_ = DataType::NONE;
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enum class OpType { LessThan, LessEqual, GreaterThan, GreaterEqual, Equal, NotEqual };
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static const std::map<std::string, OpType> mapping_; // op_name -> op
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// std::vector<std::tuple<OpType, std::any>> conditions_;
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protected:
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// prevent accidential instantiation
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RangeExpr() = default;
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public:
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void
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accept(ExprVisitor&) override;
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};
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} // namespace milvus::query
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