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29 lines
601 B
C++
29 lines
601 B
C++
#pragma once
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#include <Parsers/IAST.h>
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#include <Interpreters/InDepthNodeVisitor.h>
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namespace DB
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{
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class ASTFunction;
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/// Removes unneeded injective functions inside `uniq*()`.
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class RemoveInjectiveFunctionsMatcher
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{
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public:
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struct Data
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{
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const Context & context;
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};
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static void visit(ASTPtr & ast, const Data & data);
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static void visit(ASTFunction &, ASTPtr & ast, const Data & data);
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static bool needChildVisit(const ASTPtr & node, const ASTPtr & child);
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};
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using RemoveInjectiveFunctionsVisitor = InDepthNodeVisitor<RemoveInjectiveFunctionsMatcher, true>;
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}
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