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37 lines
1.0 KiB
C++
37 lines
1.0 KiB
C++
#pragma once
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#include <Parsers/IAST.h>
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#include <Interpreters/Settings.h>
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#include <Interpreters/evaluateQualified.h>
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namespace DB
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{
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using TableNameAndColumnsName = std::pair<DatabaseAndTableWithAlias, Names>;
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using TableNamesAndColumnsName = std::vector<TableNameAndColumnsName>;
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class QueryNormalizer
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{
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public:
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using Aliases = std::unordered_map<String, ASTPtr>;
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QueryNormalizer(ASTPtr & query, const Aliases & aliases, const Settings & settings, const Names & all_columns_name,
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const TableNamesAndColumnsName & table_names_and_columns_name);
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void perform();
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private:
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using SetOfASTs = std::set<const IAST *>;
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using MapOfASTs = std::map<ASTPtr, ASTPtr>;
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ASTPtr & query;
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const Aliases & aliases;
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const Settings & settings;
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const Names & all_columns_name;
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const std::vector<std::pair<DatabaseAndTableWithAlias, Names>> & table_names_and_columns_name;
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void performImpl(ASTPtr & ast, MapOfASTs & finished_asts, SetOfASTs & current_asts, std::string current_alias, size_t level);
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};
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}
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