mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-30 05:30:51 +00:00
31 lines
665 B
C++
31 lines
665 B
C++
|
#pragma once
|
||
|
|
|
||
|
|
#include <Parsers/IAST.h>
|
||
|
|
#include "Settings.h"
|
||
|
|
|
||
|
|
namespace DB
|
||
|
|
{
|
||
|
|
|
||
|
|
class QueryNormalizer
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
using Aliases = std::unordered_map<String, ASTPtr>;
|
||
|
|
|
||
|
|
QueryNormalizer(ASTPtr & query, const Aliases & aliases, const Settings & settings, const Names & all_columns_name);
|
||
|
|
|
||
|
|
void perform();
|
||
|
|
|
||
|
|
private:
|
||
|
|
using SetOfASTs = std::set<const IAST *>;
|
||
|
|
using MapOfASTs = std::map<ASTPtr, ASTPtr>;
|
||
|
|
|
||
|
|
ASTPtr & query;
|
||
|
|
const Aliases & aliases;
|
||
|
|
const Settings & settings;
|
||
|
|
const Names & all_columns_name;
|
||
|
|
|
||
|
|
void performImpl(ASTPtr &ast, MapOfASTs &finished_asts, SetOfASTs ¤t_asts, std::string current_alias, size_t level);
|
||
|
|
};
|
||
|
|
|
||
|
|
}
|