greenplumn CPatternTree 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CPatternTree.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2009 Greenplum, Inc.
/
/ @filename:
/ CPatternTree.h
/
/ @doc:
/ Pattern that matches entire expression trees
/---------------------------------------------------------------------------
#ifndef GPOPT_CPatternTree_H
#define GPOPT_CPatternTree_H
#include "gpos/base.h"
#include "gpopt/operators/CPattern.h"
namespace gpopt
{
using namespace gpos;
/---------------------------------------------------------------------------
/ @class:
/ CPatternTree
/
/ @doc:
/ Pattern that matches entire expression trees, e.g. scalar expressions
/
/---------------------------------------------------------------------------
class CPatternTree : public CPattern
{
private:
public:
CPatternTree(const CPatternTree &) = delete;
/ ctor
explicit CPatternTree(CMemoryPool *mp) : CPattern(mp)
{
}
/ dtor
~CPatternTree() override = default;
/ check if operator is a pattern leaf
BOOL
FLeaf() const override
{
return false;
}
/ ident accessors
EOperatorId
Eopid() const override
{
return EopPatternTree;
}
/ return a string for operator name
const CHAR *
SzId() const override
{
return "CPatternTree";
}
}; / class CPatternTree
} / namespace gpopt
#endif / !GPOPT_CPatternTree_H
/ EOF
相关信息
相关文章
greenplumn CExpressionFactorizer 源码
greenplumn CExpressionHandle 源码
greenplumn CExpressionPreprocessor 源码
greenplumn CExpressionUtils 源码