greenplumn CFunctionProp 源码
greenplumn CFunctionProp 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/base/CFunctionProp.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CFunctionProp.h
//
// @doc:
// Representation of function properties
//---------------------------------------------------------------------------
#ifndef GPOPT_CFunctionProp_H
#define GPOPT_CFunctionProp_H
#include "gpos/base.h"
#include "gpos/common/CRefCount.h"
#include "naucrates/md/IMDFunction.h"
namespace gpopt
{
using namespace gpos;
using namespace gpmd;
//---------------------------------------------------------------------------
// @class:
// CFunctionProp
//
// @doc:
// Representation of function properties
//
//---------------------------------------------------------------------------
class CFunctionProp : public CRefCount, public DbgPrintMixin<CFunctionProp>
{
private:
// function stability
IMDFunction::EFuncStbl m_efs;
// does this expression have a volatile Function Scan
BOOL m_fHasVolatileFunctionScan;
// is this function used as a scan operator
BOOL m_fScan;
public:
CFunctionProp(const CFunctionProp &) = delete;
// ctor
CFunctionProp(IMDFunction::EFuncStbl func_stability,
BOOL fHasVolatileFunctionScan, BOOL fScan);
// dtor
~CFunctionProp() override;
// function stability
IMDFunction::EFuncStbl
Efs() const
{
return m_efs;
}
// does this expression have a volatile Function Scan
virtual BOOL
FHasVolatileFunctionScan() const
{
return m_fHasVolatileFunctionScan;
}
// check if must execute on a single host
BOOL NeedsSingletonExecution() const;
// print
IOstream &OsPrint(IOstream &os) const;
}; // class CFunctionProp
// shorthand for printing
inline IOstream &
operator<<(IOstream &os, CFunctionProp &fp)
{
return fp.OsPrint(os);
}
} // namespace gpopt
#endif // !GPOPT_CFunctionProp_H
// EOF
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