greenplumn CDXLPhysicalValuesScan 源码

2022-08-18
浏览 (319)

greenplumn CDXLPhysicalValuesScan 代码

文件路径：/src/backend/gporca/libnaucrates/src/operators/CDXLPhysicalValuesScan.cpp

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2017 VMware, Inc. or its affiliates.
//
//	@filename:
//		CDXLPhysicalValuesScan.cpp
//
//	@doc:
//		Implementation of DXL physical values scan operator
//---------------------------------------------------------------------------

#include "naucrates/dxl/operators/CDXLPhysicalValuesScan.h"

#include "naucrates/dxl/operators/CDXLNode.h"
#include "naucrates/dxl/xml/CXMLSerializer.h"

using namespace gpos;
using namespace gpdxl;

// ctor
CDXLPhysicalValuesScan::CDXLPhysicalValuesScan(CMemoryPool *mp)
	: CDXLPhysical(mp)
{
}

// dtor
CDXLPhysicalValuesScan::~CDXLPhysicalValuesScan() = default;

// operator type
Edxlopid
CDXLPhysicalValuesScan::GetDXLOperator() const
{
	return EdxlopPhysicalValuesScan;
}

// operator name
const CWStringConst *
CDXLPhysicalValuesScan::GetOpNameStr() const
{
	return CDXLTokens::GetDXLTokenStr(EdxltokenPhysicalValuesScan);
}

CDXLPhysicalValuesScan *
CDXLPhysicalValuesScan::Cast(CDXLOperator *dxl_op)
{
	GPOS_ASSERT(nullptr != dxl_op);
	GPOS_ASSERT(EdxlopPhysicalValuesScan == dxl_op->GetDXLOperator());

	return dynamic_cast<CDXLPhysicalValuesScan *>(dxl_op);
}
// serialize operator in DXL format
void
CDXLPhysicalValuesScan::SerializeToDXL(CXMLSerializer *xml_serializer,
									   const CDXLNode *dxlnode) const
{
	const CWStringConst *element_name = GetOpNameStr();

	xml_serializer->OpenElement(
		CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
	// serialize properties
	dxlnode->SerializePropertiesToDXL(xml_serializer);

	// serialize children
	dxlnode->SerializeChildrenToDXL(xml_serializer);
	xml_serializer->CloseElement(
		CDXLTokens::GetDXLTokenStr(EdxltokenNamespacePrefix), element_name);
}

#ifdef GPOS_DEBUG

// checks whether operator node is well-structured
void
CDXLPhysicalValuesScan::AssertValid(const CDXLNode *dxlnode,
									BOOL validate_children) const
{
	GPOS_ASSERT(EdxloptypePhysical ==
				dxlnode->GetOperator()->GetDXLOperatorType());

	const ULONG arity = dxlnode->Arity();
	GPOS_ASSERT(EdxlValIndexSentinel <= arity);

	for (ULONG ul = 0; ul < arity; ul++)
	{
		CDXLNode *child_dxlnode = (*dxlnode)[ul];
		GPOS_ASSERT(EdxloptypeScalar ==
					child_dxlnode->GetOperator()->GetDXLOperatorType());
		if (validate_children)
		{
			child_dxlnode->GetOperator()->AssertValid(child_dxlnode,
													  validate_children);
		}
	}
}
#endif	// GPOS_DEBUG

// EOF

相关信息

greenplumn 源码目录

相关文章

greenplumn CDXLColDescr 源码

greenplumn CDXLColRef 源码

greenplumn CDXLCtasStorageOptions 源码

greenplumn CDXLDatum 源码

greenplumn CDXLDatumBool 源码

greenplumn CDXLDatumGeneric 源码

greenplumn CDXLDatumInt2 源码

greenplumn CDXLDatumInt4 源码

greenplumn CDXLDatumInt8 源码

greenplumn CDXLDatumOid 源码

0 赞

所属分类： 大数据
本文标签： greenplum
版权声明： 原创文章如转载，请注明本文链接: https://www.seaxiang.com/blog/08e919bfd4c64edf8b263d1c6149e348

热门推荐

1、直接访问google.com
2、 - 优质文章
3、 gate.io
4、 harmony 鸿蒙hdc使用指导
5、 harmony 鸿蒙ArkUI组件（ArkTS）开发常见问题
6、 harmony 鸿蒙初识ArkTS语言
7、 golang
8、 flink kafka connector scan.startup.mode 的几个选项
9、 openharmony
10、 Vue中input框自动聚焦

Loading...