ODI - A Journey - DAY 2

technonotes-hacker - Mar 25 - - Dev Community

DESIGNER

  1. Target and Source Metadata.
  2. Here import from DB

MODELS

  • New Model Folder
  • Give any name , like Oracle i.e whatever the name you want.
  • After giving the name you wont see anything while you expand.

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  • Now create new model ,

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  • Metadata taken from ORACLE DB here scott schema.
  • Map the Logical schema name here.
  • Write the description so that you will understand in future, why this Designer is created.

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Reverse Engineering

  • Types of object to reverse engineering.

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Selective Reverse Engineering

  • Difference between New Datastores & Existing Datastores. ( if you want to reimport the table again which the reverse engineering is done , that time you can enable the EXISTING DATASTORE )
  • Click the Reverse Engineering here.

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  • See the difference carefully for " New Datastores & Existing Datastores "

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  • It will overwrite the existing one , but here is the super question . If my table as 5 columns at first --> reverse engineering is done --> There is some update in the table where the column is reduced to 4 --> if I click the reverse engineering what will happen ? ANSWER is --> It will replace completely . Can I create multiple copies here ?

  • Create the Model for the target too like below.

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PROJECTS

  • New Projects --> Give any name.
  • Once created , you will see

First Folder - Variables - Sequences - User Functions - Knowledge Module - Markers

  • You can even create NEW FOLDERS also.
  • Goto the MAPPINGS --> New Mappings --> Mapping Name.
  • What is CREATE EMPTY DATASET ? It will create a EMPTY PANEL to drag and drop the source and target.
  • Drag and drop the TARGET & SOURCE from the MODEL.

KNOWLEDGE MODULES

  • Once the Target and Source are drag and dropped , now go to the KM.

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  • Select the KM.
  • Here , Oracle to Oracle won't be there , so select SQL TO SQL as Oracle supports SQL.
  • What is LKM & RKM , IKM ?

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MAPPING

  • Map the Source to Target in the Logical panel.

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  • Now goto PHYSICAL,source and target will be visible.
  • Once you click the Default in the Target , select the LKM.
  • LKM will create a TEMP table.
  • FALSE means it will keep the TEMP date. Tell me will it consume more space in the target ?

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  • Keep an EYE ON THE INDEXES , if you need enable it.

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  • If the TARGET doesn't have the table , then enable this below options.

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  • Validate the mapping.
  • RUN the Project.

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  • What is SIMULATION here ?
  • Below option should be disabled , ( this is an option in the Oracle DB )

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  • Once the execution completed , go to Operation Tab.

OPERATION

  • You can view the execution.

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  • Constrains --> Unique / Foreign keys.
  • You can create NEW TASK also here , in future if you want to add.

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QUESTIONS

  1. What is LKM & IKM ?
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