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

#pragma once

#include <DB/Parsers/IParserBase.h>


namespace DB
{

/** List of single or multiple JOIN-ed tables or subqueries in SELECT query, with ARRAY JOINs and SAMPLE, FINAL modifiers.
  */
class ParserTablesInSelectQuery : public IParserBase
{
protected:
	const char * getName() const { return "table, table function, subquery or list of joined tables"; }
	bool parseImpl(Pos & pos, Pos end, ASTPtr & node, Pos & max_parsed_pos, Expected & expected);
};


class ParserTablesInSelectQueryElement : public IParserBase
{
public:
	ParserTablesInSelectQueryElement(bool is_first) : is_first(is_first) {}

protected:
	const char * getName() const { return "table, table function, subquery or list of joined tables"; }
	bool parseImpl(Pos & pos, Pos end, ASTPtr & node, Pos & max_parsed_pos, Expected & expected);

private:
	bool is_first;
};


class ParserTableExpression : public IParserBase
{
protected:
	const char * getName() const { return "table or subquery or table function"; }
	bool parseImpl(Pos & pos, Pos end, ASTPtr & node, Pos & max_parsed_pos, Expected & expected);
};


class ParserArrayJoin : public IParserBase
{
protected:
	const char * getName() const { return "array join"; }
	bool parseImpl(Pos & pos, Pos end, ASTPtr & node, Pos & max_parsed_pos, Expected & expected);
};


}