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25 lines
413 B
C++
25 lines
413 B
C++
#pragma once
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#include <map>
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#include <Parsers/IAST.h>
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namespace DB
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{
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/// Propagate every WITH alias expression to its descendent subqueries, with correct scoping visibility.
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class ApplyWithAliasVisitor
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{
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public:
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struct Data
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{
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std::map<String, ASTPtr> exprs;
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};
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static void visit(ASTPtr & ast) { visit(ast, {}); }
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private:
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static void visit(ASTPtr & ast, const Data & data);
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};
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}
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