text: //---------------------------------------------------------------------------
  //	Greenplum Database
  //	Copyright (C) 2012 EMC Corp.
  //
  //	@filename:
  //		CDXLScalarArray.h
  //
  //	@doc:
  //		Class for representing DXL scalar arrays
  //---------------------------------------------------------------------------
  
  #ifndef GPDXL_CDXLScalarArray_H
  #define GPDXL_CDXLScalarArray_H
  
  #include "gpos/base.h"
  #include "naucrates/dxl/operators/CDXLScalar.h"
  #include "naucrates/md/IMDId.h"
  
  namespace gpdxl
  {
  using namespace gpmd;
  
  //---------------------------------------------------------------------------
  //	@class:
  //		CDXLScalarArray
  //
  //	@doc:
  //		Class for representing DXL arrays
  //
  //---------------------------------------------------------------------------
  class CDXLScalarArray : public CDXLScalar
  {
  private:
  	// base element type id
  	IMDId *m_elem_type_mdid;
  
  	// array type id
  	IMDId *m_array_type_mdid;
  
  	// is it a multidimensional array
  	BOOL m_multi_dimensional_array;
  
  public:
  	CDXLScalarArray(const CDXLScalarArray &) = delete;
  
  	// ctor
  	CDXLScalarArray(CMemoryPool *mp, IMDId *elem_type_mdid,
  					IMDId *array_type_mdid, BOOL multi_dimensional_array);
  
  	// dtor
  	~CDXLScalarArray() override;
  
  	// ident accessors
  	Edxlopid GetDXLOperator() const override;
  
  	// operator name
  	const CWStringConst *GetOpNameStr() const override;
  
  	// element type id
  	IMDId *ElementTypeMDid() const;
  
  	// array type id
  	IMDId *ArrayTypeMDid() const;
  
  	// is array multi-dimensional
  	BOOL IsMultiDimensional() const;
  
  	// serialize operator in DXL format
  	void SerializeToDXL(CXMLSerializer *xml_serializer,
  						const CDXLNode *dxlnode) const override;
  
  	// conversion function
  	static CDXLScalarArray *
  	Cast(CDXLOperator *dxl_op)
  	{
  		GPOS_ASSERT(NULL != dxl_op);
  		GPOS_ASSERT(EdxlopScalarArray == dxl_op->GetDXLOperator());
  
  		return dynamic_cast<CDXLScalarArray *>(dxl_op);
  	}
  
  	// does the operator return a boolean result
  	BOOL
  	HasBoolResult(CMDAccessor *	 //md_accessor
  	) const override
  	{
  		return false;
  	}
  
  #ifdef GPOS_DEBUG
  	// checks whether the operator has valid structure, i.e. number and
  	// types of child nodes
  	void AssertValid(const CDXLNode *dxlnode,
  					 BOOL validate_children) const override;
  #endif	// GPOS_DEBUG
  };
  }  // namespace gpdxl
  
  #endif	// !GPDXL_CDXLScalarArray_H
  
  // EOF
  