Creating an Application to Load Your Meta Data Model - Teradata Meta Data Services

Creating an Application to Load Your Meta Data Model

This section describes example code that shows you how you can create an application to load your meta data model into the MDS repository.

In this example each Create call is treated as a separate statement.

Installed in the sample folder is an example file which shows how all model data can be coded in an array and a generic program which loops through the array to use Create to create the model, class, property and relationship descriptions.

HRESULT CreateAutoWorldModel()

{

	HRESULT result;

	CMetaAIM model;

	CMetaClassDesc *AutoCorpClass = NULL;

	CMetaClassDesc *AutoDevisionClass = NULL;

	CMetaClassDesc *AutoClass = NULL;

	CMetaClassDesc *AutoExClass = NULL;

	CMetaClassDesc *BaseTruckClass = NULL;

	CMetaClassDesc *TruckClass = NULL;

	CMetaClassDesc *SportUteClass = NULL;

	CMetaClassDesc *VanClass = NULL;

	CMetaPropertyDesc *pProp = NULL;

	CMetaRelationshipDesc *pCorpHasDivRel = NULL;

	CMetaRelationshipDesc *pDivMakesAutosRel = NULL;

	CMetaRelationshipDesc *pDivMakesTrucksRel = NULL;

	MetaObjectIDVector RelsToProp;

	MetaObjectIDVector superClasses;

	result = model.CreateMDSModel(

				NMAUTOWORLD, // Name

				_T("Model for Auto Industry"), //Description

				MODELGUID_AW // GUID

				); 

	if (SUCCEEDED(result))

	{

		// Create Auto Class Description

		result = model.CreateMDSClassDesc2(

					AutoClass, // return object

					NMAUTO, //Name

					_T("Class of Autos"), //Description

					MD_UNIQUE, // UniqueNamesFlag

					CLSGUID_Auto, // GUID

					NULLLOID, // use default owner

					NULLLOID, // use default security profile

					false , // a root class

					false, // abstract class

					superClasses

					);

	}

	// Create DivisionMakesAutos Relationship Description

	if (SUCCEEDED(result)) 

	{

		result =  model.CreateMDSRelationshipDesc(

					pDivMakesAutosRel, // Relationship object

					NMDIVMAKESAUTOS, //Name

					_T("Relationship that links autos to divisions"), //Description

					AutoDevisionClass->GetObjectID(), // Orig Classid

					AutoClass->GetObjectID(), // Dest Classid

					MD_NULL, // UniqueNames Flag

					MD_PROPDEL, // Propagate Delete Flag

					RELGUID_DivMakesAutos, // GUID

					NULLLOID, // use default owner

					NULLLOID // use default security profile

					);

	}

	if (AutoDevisionClass)

		delete AutoDevisionClass;

	if (AutoClass)

		delete AutoClass;

	if (pProp)

		delete pProp;

	if (pDivMakesAutosRel)

		delete pDivMakesAutosRel;

	return (result);

}