expression_type.h

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#pragma once
 
#include <cstdint>
#include <string>
 
namespace kuzu {
namespace common {
 
enum class ExpressionType : uint8_t {
    // Boolean Connection Expressions
    OR = 0,
    XOR = 1,
    AND = 2,
    NOT = 3,
 
    // Comparison Expressions
    EQUALS = 10,
    NOT_EQUALS = 11,
    GREATER_THAN = 12,
    GREATER_THAN_EQUALS = 13,
    LESS_THAN = 14,
    LESS_THAN_EQUALS = 15,
 
    // Null Operator Expressions
    IS_NULL = 50,
    IS_NOT_NULL = 51,
 
    PROPERTY = 60,
 
    LITERAL = 70,
 
    STAR = 80,
 
    VARIABLE = 90,
    PATH = 91,
    PATTERN = 92, // Node & Rel pattern
 
    PARAMETER = 100,
 
    // At parsing stage, both aggregate and scalar functions have type FUNCTION.
    // After binding, only scalar function have type FUNCTION.
    FUNCTION = 110,
 
    AGGREGATE_FUNCTION = 130,
 
    SUBQUERY = 190,
 
    CASE_ELSE = 200,
 
    GRAPH = 210,
 
    LAMBDA = 220,
 
    // NOTE: this enum has type uint8_t so don't assign over 255.
    INVALID = 255,
};
 
struct ExpressionTypeUtil {
    static bool isUnary(ExpressionType type);
    static bool isBinary(ExpressionType type);
    static bool isBoolean(ExpressionType type);
    static bool isComparison(ExpressionType type);
    static bool isNullOperator(ExpressionType type);
 
    static ExpressionType reverseComparisonDirection(ExpressionType type);
 
    static std::string toString(ExpressionType type);
    static std::string toParsableString(ExpressionType type);
};
 
} // namespace common
} // namespace kuzu