greenplumn CDXLScalarArrayCoerceExpr 源码
greenplumn CDXLScalarArrayCoerceExpr 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/operators/CDXLScalarArrayCoerceExpr.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2017 VMware, Inc. or its affiliates.
//
// @filename:
// CDXLScalarArrayCoerceExpr.h
//
// @doc:
// Class for representing DXL ArrayCoerceExpr operation,
// the operator will apply type casting for each element in this array
// using the given element coercion function.
// @owner:
//
// @test:
//
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLScalarArrayCoerceExpr_H
#define GPDXL_CDXLScalarArrayCoerceExpr_H
#include "gpos/base.h"
#include "naucrates/dxl/operators/CDXLScalarCoerceBase.h"
#include "naucrates/md/IMDId.h"
namespace gpdxl
{
using namespace gpos;
using namespace gpmd;
//---------------------------------------------------------------------------
// @class:
// CDXLScalarArrayCoerceExpr
//
// @doc:
// Class for representing DXL array coerce operator
//---------------------------------------------------------------------------
class CDXLScalarArrayCoerceExpr : public CDXLScalarCoerceBase
{
private:
// catalog MDId of element coerce function
IMDId *m_coerce_func_mdid;
// conversion semantics flag to pass to func
BOOL m_explicit;
public:
CDXLScalarArrayCoerceExpr(const CDXLScalarArrayCoerceExpr &) = delete;
CDXLScalarArrayCoerceExpr(CMemoryPool *mp, IMDId *coerce_func_mdid,
IMDId *result_type_mdid, INT type_modifier,
BOOL is_explicit, EdxlCoercionForm coerce_format,
INT location);
~CDXLScalarArrayCoerceExpr() override
{
m_coerce_func_mdid->Release();
}
// ident accessor
Edxlopid
GetDXLOperator() const override
{
return EdxlopScalarArrayCoerceExpr;
}
// return metadata id of element coerce function
IMDId *
GetCoerceFuncMDid() const
{
return m_coerce_func_mdid;
}
BOOL
IsExplicit() const
{
return m_explicit;
}
// name of the DXL operator name
const CWStringConst *GetOpNameStr() const override;
// serialize operator in DXL format
void SerializeToDXL(CXMLSerializer *xml_serializer,
const CDXLNode *dxlnode) const override;
// conversion function
static CDXLScalarArrayCoerceExpr *
Cast(CDXLOperator *dxl_op)
{
GPOS_ASSERT(nullptr != dxl_op);
GPOS_ASSERT(EdxlopScalarArrayCoerceExpr == dxl_op->GetDXLOperator());
return dynamic_cast<CDXLScalarArrayCoerceExpr *>(dxl_op);
}
};
} // namespace gpdxl
#endif // !GPDXL_CDXLScalarArrayCoerceExpr_H
// EOF
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