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