ClickHouse/src/Parsers/ASTQueryWithTableAndOutput.h

#pragma once

#include <Parsers/IAST.h>
#include <Parsers/ASTQueryWithOutput.h>
#include <Core/UUID.h>


namespace DB
{


/** Query specifying table name and, possibly, the database and the FORMAT section.
  */
class ASTQueryWithTableAndOutput : public ASTQueryWithOutput
{
public:
    ASTPtr database;
    ASTPtr table;

    UUID uuid = UUIDHelpers::Nil;
    bool temporary{false};

    String getDatabase() const;
    String getTable() const;

    // Once database or table are set they cannot be assigned with empty value
    void setDatabase(const String & name);
    void setTable(const String & name);

    void cloneTableOptions(ASTQueryWithTableAndOutput & cloned) const;

protected:
    void formatHelper(const FormatSettings & settings, const char * name) const;
};


template <typename AstIDAndQueryNames>
class ASTQueryWithTableAndOutputImpl : public ASTQueryWithTableAndOutput
{
public:
    String getID(char delim) const override { return AstIDAndQueryNames::ID + (delim + getDatabase()) + delim + getTable(); }

    ASTPtr clone() const override
    {
        auto res = std::make_shared<ASTQueryWithTableAndOutputImpl<AstIDAndQueryNames>>(*this);
        res->children.clear();
        cloneOutputOptions(*res);
        cloneTableOptions(*res);
        return res;
    }

    QueryKind getQueryKind() const override { return QueryKind::Show; }

protected:
    void formatQueryImpl(const FormatSettings & settings, FormatState &, FormatStateStacked) const override
    {
        formatHelper(settings, temporary ? AstIDAndQueryNames::QueryTemporary : AstIDAndQueryNames::Query);
    }
};

}