greenplumn CPatternMultiLeaf 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CPatternMultiLeaf.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2009 Greenplum, Inc.
/
/ @filename:
/ CPatternMultiLeaf.h
/
/ @doc:
/ Pattern that matches a variable number of leaves
/---------------------------------------------------------------------------
#ifndef GPOPT_CPatternMultiLeaf_H
#define GPOPT_CPatternMultiLeaf_H
#include "gpos/base.h"
#include "gpopt/operators/CPattern.h"
namespace gpopt
{
using namespace gpos;
/---------------------------------------------------------------------------
/ @class:
/ CPatternMultiLeaf
/
/ @doc:
/ Pattern that matches a variable number of expressions, eg inputs to
/ union operator
/
/---------------------------------------------------------------------------
class CPatternMultiLeaf : public CPattern
{
private:
public:
CPatternMultiLeaf(const CPatternMultiLeaf &) = delete;
/ ctor
explicit CPatternMultiLeaf(CMemoryPool *mp) : CPattern(mp)
{
}
/ dtor
~CPatternMultiLeaf() override = default;
/ check if operator is a pattern leaf
BOOL
FLeaf() const override
{
return true;
}
/ ident accessors
EOperatorId
Eopid() const override
{
return EopPatternMultiLeaf;
}
/ return a string for operator name
const CHAR *
SzId() const override
{
return "CPatternMultiLeaf";
}
}; / class CPatternMultiLeaf
} / namespace gpopt
#endif / !GPOPT_CPatternMultiLeaf_H
/ EOF
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