greenplumn CXformImplementPartitionSelector 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/xforms/CXformImplementPartitionSelector.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2014 VMware, Inc. or its affiliates.
/
/ @filename:
/ CXformImplementPartitionSelector.h
/
/ @doc:
/ Implement PartitionSelector
/---------------------------------------------------------------------------
#ifndef GPOPT_CXformImplementPartitionSelector_H
#define GPOPT_CXformImplementPartitionSelector_H
#include "gpos/base.h"
#include "gpopt/xforms/CXformImplementation.h"
namespace gpopt
{
using namespace gpos;
/---------------------------------------------------------------------------
/ @class:
/ CXformImplementPartitionSelector
/
/ @doc:
/ Implement PartitionSelector
/
/---------------------------------------------------------------------------
class CXformImplementPartitionSelector : public CXformImplementation
{
private:
public:
CXformImplementPartitionSelector(const CXformImplementPartitionSelector &) =
delete;
/ ctor
explicit CXformImplementPartitionSelector(CMemoryPool *mp);
/ dtor
~CXformImplementPartitionSelector() override = default;
/ ident accessors
EXformId
Exfid() const override
{
return ExfImplementPartitionSelector;
}
/ xform name
const CHAR *
SzId() const override
{
return "CXformImplementPartitionSelector";
}
/ compute xform promise for a given expression handle
EXformPromise
Exfp(CExpressionHandle & /exprhdl
) const override
{
return CXform::ExfpHigh;
}
/ actual transform
void Transform(CXformContext *, CXformResult *,
CExpression *) const override;
}; / class CXformImplementPartitionSelector
} / namespace gpopt
#endif / !GPOPT_CXformImplementPartitionSelector_H
/ EOF
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