Transforms AK

8/7/2019 Transforms AK

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Transforms

Module 2


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Module Objectives

After this module, you will be able to:

Use logical-level transforms to document design

decisions

Maintain the link to the logical model usingphysical design transforms


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Using Logical-LevelTransforms

Lesson 1


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Lesson Objectives

After this lesson, you will be able to: Resolve Many-to-Many Relationships

Address Supertype/Subtype structures


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Transforms Introduction

Record design decisions

Manage structural changes between related design layers

A mechanism by which one or more model

objects are transformed into a different set ofmodel objects, with the change structured andstored within the model

TRANSFORM


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Transforms Supported

Available in logicaland physical

Many-to-Many

Resolution

Supertype/Subtype Roll-

up

Supertype/Subtype Roll-

down

Supertype/SubtypeIdentity

Available in physicalonly

Roll-up Denormalization

Roll-down

Denormalization

Vertical Partition

Horizontal Partition

Linked Column Copy

Denormalization


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Many-to-Many

supported product code

supported product manufacturer

supported product name

supported product description

supported product category

SUPPORTED PRODUCTis involved in

involves

supported product code

supported product manufacturer

supported product namesupported product description

supported product category

SUPPORTED PRODUCTproblem number

employee number (FK)

customer number (FK)

problem open datetime

problem description

problem status

problem severity

PROBLEM

supported product code (FK)

problem number (FK)

SUPPORTED PRODUCT-PROBLEM

Source

Objects

Target

Objects

problem number

employee number (FK)

customer number (FK)

problem open datetime

problem description

problem status

problem severity

PROBLEM


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Supertype/Subtype Roll-up

TRUCK

vehicle id (FK)

gross weight

empty

gross weight full

BOAT

vehicle id (FK)

displacement

VEHICLEvehicle id

vehicle make

vehicle model

vehicle model year

vehicle colorvehicle type

VEHICLE

vehicle id

vehicle make

vehicle model

vehicle model year


gross weight empty

gross weight full

displacement

Source

Objects

Target

Object


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Supertype/Subtype Roll-down

vehicle id

vehicle make

vehicle model

vehicle model year

vehicle color

vehicle type

displacement

BOAT

TRUCKvehicle id

vehicle make

vehicle model

vehicle model year

vehicle color

vehicle typegross weight empty

gross weight full

Targe

tObje

cts

TRUCK

vehicle id (FK)

gross weight

empty

gross weight full

BOAT

vehicle id (FK)

displacement

VEHICLEvehicle id

vehicle make

vehicle model

vehicle model year


Source

Objects


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Supertype/Subtype Identity

TRUCK

vehicle id (FK)

gross weight empty

gross weight full

BOATvehicle id

(FK)

displacement

VEHICLEvehicle id

vehicle make

vehicle model

vehicle model year

vehicle color

vehicle type

TRUCK

vehicle id (FK)

gross weight empty

gross weight full

BOAT

vehicle id (FK)

displacement

VEHICLE

vehicle id

vehicle make

vehicle model

vehicle model year


Source

Objects

Target

Objects


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Transforms The MechanicsResults

The source objects are hidden in the model

The targetobjects are created

A transform object is created and appears in the Model

Explorer

A transform may be

Resolved the hidden source objects are deleted and it is as if

the model objects were manually changed rather than

transformed into an alternate structure

Reversed the target objects are deleted and the hiddensource objects are made visible and active once again it is

as if the transform was never invoked


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Logical Transforms

Demonstration

Creating Transforms Many-to-Many Resolution

Supertype/Subtype

Roll-up Roll-down

Identity


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Creating a Many-to-Many

Resolution Transform


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Creating a Supertype/Subtype

Roll-Up Transform


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Roll-Down Transform


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Identity Transform


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Lesson Summary

You should now be able to: Resolve Many-to-Many Relationships

Address Supertype/Subtype structures


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Lesson Assessment


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Lesson Activity


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Using Physical DesignTransforms

Lesson 2


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Lesson Objectives

After this lesson, you will be able to: Denormalize related tables

Partition tables

Denormalize columns


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Roll-up Denormalization

sls_ord_nr (FK)

ln_itm_seq_nr

prod_id (FK)

ln_itm_qty

ln_itm_ttl

LN_ITM

sls_ord_nrcust_nr (FK)

sls_ord_dt

sls_ord_ttl

sls_ord_stat_cd

sls_ord_ship_dt

sls_ord_ship_meth_cdsls_ord_ship_chrg

prod_id_1 (FK)

ln_itm_qty_1

ln_itm_ttl_1

prod_id_2 (FK)

ln_itm_qty_2

ln_itm_ttl_2

prod_id_3 (FK)

ln_itm_qty_3

ln_itm_ttl_3

prod_id_4 (FK)

ln_itm_qty_4

ln_itm_ttl_4

SLSORD

Source Objects

Target

Object

sls_ord_nr

cust_nr (FK)

sls_ord_dt

sls_ord_ttl

sls_ord_stat_cd

sls_ord_ship_dtsls_ord_ship_meth_cd

sls_ord_ship_chrg

SLSORD


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Roll-down Denormalization

Source

Objects

Target

Object

sls_ord_nr

cust_nr (FK)

sls_ord_dt

sls_ord_ttl

sls_ord_stat_cd

sls_ord_ship_dtsls_ord_ship_meth_cd

sls_ord_ship_chrg

SLSORD

sls_ord_nr (FK)

ln_itm_seq_nr

prod_id (FK)

ln_itm_qty

ln_itm_ttl

LN_ITM

sls_ord_nr

ln_itm_seq_nr

cust_nr (FK)

sls_ord_dt

sls_ord_ttl

sls_ord_stat_cd

sls_ord_ship_dt

sls_ord_ship_meth_cd

sls_ord_ship_chrg

prod_id (FK)

ln_itm_qty

ln_itm_ttl

LN_ITM


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Vertical Partition

cust_id

cust_first_nm

cust_ las_ nm

cust_street_address_tx

cust_city_nmcust_state_cd

cust_zip_cd

cust_area_cd

cust_phone_nr

cust_pref_contact_method_cd

cust_pref_ship_ meth_cdcust_first_order_dt

cust_date_ of_birth

CUST cust_id

cust_first_nm

cust_ las_ nm


cust_city_nm

cust_state_cd

cust_zip_cdcust_area_cd

cust_phone_nr

CUST_1

cust_id

cust_pref_contact_method_cd

cust_pref_ship_ meth_cd

cust_first_order_dt

cust_date_ of_birth

CUST_2

Source Object Target Objects


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Horizontal Partition

cust_id

cust_first_nm

cust_ last_ nm


cust_city_nm

cust_state_cd

cust_zip_cd

cust_area_cd

cust_phone_nr

CUSTcust_id

cust_first_nm

cust_ last_ nm


cust_city_nm

cust_state_cdcust_zip_cd

cust_area_cd

cust_phone_nr

CUST_1 (A through M)

cust_id

cust_first_nm

cust_ las_ nm


cust_city_nmcust_state_cd

cust_zip_cd

cust_area_cd

cust_phone_nr

CUST_2 (N through Z)

Source Object Target Objects


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Linked Column Copy

Denormalization

sls_ord_nr

cust_id (FK)

cust_last_nmsls_ord_dt

sls_ord_ttl

sls_ord_stat_cd

sls_ord_ship_dt


sls_ord_ship_chrg

SLSORD

cust_id

cust_first_nm

cust_ last_ nmcust_street_address_tx

cust_city_nm

cust_state_cdcust_zip_cd

cust_area_cd

cust_phone_nr

CUSTSource

Object

TargetObject

cust_idcust_first_nm

cust_ last_ nmcust_street_address_tx

cust_city_nm

cust_state_cd

cust_zip_cd

cust_area_cdcust_phone_nr

CUST

sls_ord_nr

cust_id (FK)

sls_ord_dt

sls_ord_ttl

sls_ord_stat_cd

sls_ord_ship_dt


sls_ord_ship_chrg

SLSORD


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Benefits of Transforms

Maintain documentation of design decisions Manage mapping of objects between design

layers

Allow changes to be propagated properly between

design layers

Allow changes to be reversed


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Physical Transforms

Demonstration Creating denormalization transforms

Roll-up

Roll-down

Creating partitions

Horizontal

Vertical

Creating a linked column copy transform


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Creating a Roll-down

Denormalization Transform


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Creating a Roll-Up



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Creating a Vertical Partition

Transform


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Creating a Horizontal Partition

Transform


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Creating a Linked Column Copy



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Lesson Summary

You should now be able to: Denormalize related tables

Partition tables

Denormalize columns


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Lesson Assessment


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Lesson Activity


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Module Summary

You should now be able to: Use logical-level transforms to document design

decisions

Maintain the link to the logical model usingphysical design transforms

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