ClickHouse/src/Storages/ConstraintsDescription.h

#pragma once

#include <Parsers/ASTConstraintDeclaration.h>
#include <Interpreters/ExpressionActions.h>

namespace DB
{

using ConstraintsExpressions = std::vector<ExpressionActionsPtr>;

struct ConstraintsDescription
{
    enum class ConstraintType {
        CHECK,
        ASSUME,
    };

    std::vector<ASTPtr> constraints;

    ConstraintsDescription() = default;

    bool empty() const { return constraints.empty(); }
    String toString() const;

    static ConstraintsDescription parse(const String & str);

    ASTs filterConstraints(ConstraintType type) const;

    ConstraintsExpressions getExpressionsToCheck(const Context & context, const NamesAndTypesList & source_columns_) const;

    ConstraintsDescription(const ConstraintsDescription & other);
    ConstraintsDescription & operator=(const ConstraintsDescription & other);
};

}