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28 lines
702 B
C++
28 lines
702 B
C++
#pragma once
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#include <Interpreters/Aliases.h>
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#include <Interpreters/Context_fwd.h>
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#include <Interpreters/DatabaseAndTableWithAlias.h>
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#include <Parsers/IAST_fwd.h>
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namespace DB
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{
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struct TreeRewriterResult;
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/// Part of of Tree Rewriter (SyntaxAnalyzer) that optimizes AST.
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/// Query should be ready to execute either before either after it. But resulting query could be faster.
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class TreeOptimizer
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{
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public:
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static void apply(
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ASTPtr & query,
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TreeRewriterResult & result,
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const std::vector<TableWithColumnNamesAndTypes> & tables_with_columns,
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ContextPtr context);
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static void optimizeIf(ASTPtr & query, Aliases & aliases, bool if_chain_to_multiif);
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};
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}
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