ClickHouse/dbms/include/DB/Parsers/ParserCreateQuery.h

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#pragma once
#include <DB/Parsers/IParserBase.h>
#include <DB/Parsers/ExpressionElementParsers.h>
namespace DB
{
/** Вложенная таблица. Например, Nested(UInt32 CounterID, FixedString(2) UserAgentMajor)
*/
class ParserNestedTable : public IParserBase
{
protected:
const char * getName() const { return "nested table"; }
bool parseImpl(Pos & pos, Pos end, ASTPtr & node, const char *& expected);
};
/** Параметрический тип или Storage. Например:
* FixedString(10) или
* Partitioned(Log, ChunkID) или
* Nested(UInt32 CounterID, FixedString(2) UserAgentMajor)
* Результат парсинга - ASTFunction с параметрами или без.
*/
class ParserIdentifierWithParameters : public IParserBase
{
protected:
const char * getName() const { return "identifier with parameters"; }
bool parseImpl(Pos & pos, Pos end, ASTPtr & node, const char *& expected);
};
/** Тип или Storage, возможно, параметрический. Например, UInt8 или примеры из ParserIdentifierWithParameters
* Результат парсинга - ASTFunction с параметрами или без.
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*/
class ParserIdentifierWithOptionalParameters : public IParserBase
{
protected:
const char * getName() const { return "identifier with optional parameters"; }
bool parseImpl(Pos & pos, Pos end, ASTPtr & node, const char *& expected);
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};
/** Имя и тип через пробел. Например, URL String. */
class ParserNameTypePair : public IParserBase
{
protected:
const char * getName() const { return "name and type pair"; }
bool parseImpl(Pos & pos, Pos end, ASTPtr & node, const char *& expected);
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};
/** Список столбцов. */
class ParserNameTypePairList : public IParserBase
{
protected:
const char * getName() const { return "name and type pair list"; }
bool parseImpl(Pos & pos, Pos end, ASTPtr & node, const char *& expected);
};
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/** ENGINE = name. */
class ParserEngine : public IParserBase
{
protected:
const char * getName() const { return "ENGINE"; }
bool parseImpl(Pos & pos, Pos end, ASTPtr & node, const char *& expected);
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};
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/** Запрос типа такого:
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* CREATE|ATTACH TABLE [IF NOT EXISTS] [db.]name
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* (
* name1 type1,
* name2 type2,
* ...
* ) ENGINE = engine
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*
* Или:
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* CREATE|ATTACH TABLE [IF NOT EXISTS] [db.]name AS [db2.]name2 [ENGINE = engine]
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*
* Или:
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* CREATE|ATTACH TABLE [IF NOT EXISTS] [db.]name AS ENGINE = engine SELECT ...
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*
* Или:
* CREATE|ATTACH DATABASE db
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*
* Или:
* CREATE|ATTACH [MATERIALIZED] VIEW [IF NOT EXISTS] [db.]name [ENGINE = engine] [POPULATE] AS SELECT ...
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*/
class ParserCreateQuery : public IParserBase
{
protected:
const char * getName() const { return "CREATE TABLE or ATTACH TABLE query"; }
bool parseImpl(Pos & pos, Pos end, ASTPtr & node, const char *& expected);
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};
}