greenplumn IMDTypeBool 源码
greenplumn IMDTypeBool 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/md/IMDTypeBool.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2011 EMC Corp.
//
// @filename:
// IMDTypeBool.h
//
// @doc:
// Interface for BOOL types in the metadata cache
//---------------------------------------------------------------------------
#ifndef GPMD_IMDTypeBool_H
#define GPMD_IMDTypeBool_H
#include "gpos/base.h"
#include "naucrates/dxl/gpdb_types.h"
#include "naucrates/md/IMDType.h"
// fwd decl
namespace gpnaucrates
{
class IDatumBool;
}
namespace gpmd
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// IMDTypeBool
//
// @doc:
// Interface for BOOL types in the metadata cache
//
//---------------------------------------------------------------------------
class IMDTypeBool : public IMDType
{
public:
// type id
static ETypeInfo
GetTypeInfo()
{
return EtiBool;
}
ETypeInfo
GetDatumType() const override
{
return IMDTypeBool::GetTypeInfo();
}
// factory function for BOOL datums
virtual IDatumBool *CreateBoolDatum(CMemoryPool *mp, BOOL value,
BOOL is_null) const = 0;
};
} // namespace gpmd
#endif // !GPMD_IMDTypeBool_H
// EOF
相关信息
相关文章
greenplumn CDXLStatsDerivedColumn 源码
greenplumn CDXLStatsDerivedRelation 源码
greenplumn CMDAggregateGPDB 源码
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
7、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦