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Creating IMS tables and views for Classic federation

To query or update data in an IMS™ database, you must create a relational table that maps to that database. You can also create a view on the table to filter record types or to filter rows and columns. Use the New IMS Table wizard to create the table and optionally the view.

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Before you begin

Restrictions

If you are creating a table that maps to an IMS database, use the table only for change capture or only for queries and updates. Typical mappings of an IMS database for queries contain column definitions for all or most of the data in the segments that are referenced by the table. For updates, restrictions on what can be inserted or updated can require you to create custom versions of your tables for updates only.

About this task

For more information about creating tables and views that map to IMS databases, see the related links for IMS syntax diagrams and for views.

Procedure

To create a IMS table and optionally a view for Classic federation:

  1. Map your IMS database to a relational table and optionally a view by using the New IMS Table wizard.
    1. Open this wizard by right-clicking either the database in your data design project or one of the schemas within the database. Select Add Classic Object > IMS table.
    2. Select the DBD file that you want to base the table on.
    3. Choose whether to use the table for queries, updates, or both.
    4. Choose whether to create a view on the table.
    5. Provide information about how to access the IMS database.
    6. For the each segment that is in the path, specify a COBOL copybook, select the desired 01 level if there is more than one, and then select the elements that you want to map as columns.
    7. If you are creating a view, specify the criteria for the WHERE clause.
    When you finish the wizard, the new table appears under the selected schema. If you created a view, the view also appears under the selected schema.
  2. Optional: Modify the table properties or add privileges. Select the table and make any changes in the Properties view.
  3. Optional: Create one or more indexes on the table. See Creating indexes.
  4. Optional: Generate the DDL for the table. You can generate the DDL later, if you do not want to generate it now. You can also generate the DDL for all of the objects within the same schema. See Generating DDL.
    1. Right-click the table and select Generate DDL.
    2. In the Generate DDL wizard, follow these steps:
      1. Choose to generate CREATE statements.
      2. Choose to generate DDL for tables. You can also choose to generate DDL for indexes.
      3. Name the file in which to save the DDL within your project.
      4. Choose whether to run the DDL on a data server. After you run the DDL, check the Data Output view to determine whether the DDL ran successfully.
      5. Choose whether to open the DDL for editing.
  5. Optional: If you ran the DDL successfully on a data server, validate the table by running a test query against your IMS database. Be sure that the data server is connected to that database.
    1. In the Database Explorer, search your data server for the schema that you created the table in. Expand the schema and expand the Tables folder.
    2. Right-click the table and select Data > Sample Contents.
    3. Check the Data Output view to determine whether the test query ran successfully.
  6. Optional: If you created a view, generate the DDL for the view. You can generate the DDL later. You can also generate the DDL for all of the objects within the same schema. See Generating DDL.
    1. Right-click the view and select Generate DDL.
    2. In the Generate DDL wizard, follow these steps:
      1. Choose to generate CREATE and ALTER statements.
      2. Choose to generate DDL for views.
      3. Name the file in which to save the DDL within your project.
      4. Choose whether to run the DDL on a data server. After you run the DDL, check the Data Output view to determine whether the DDL ran successfully.
      5. Choose whether you want to open the DDL for editing.
  7. Optional: If you ran the DDL successfully on a data server, validate the view by running a test query against your IMS database. Be sure that the data server is connected to that database.
    1. In the Database Explorer, search your data server for the schema that you created the view in. Expand the schema and expand the Views folder.
    2. Right-click the view and select Data > Sample Contents.
    3. Check the Data Output view to determine whether the test query ran successfully.
Related concepts
Mapping data for Classic federation
Occurs processing
Creating views on existing tables
Viewing and modifying objects
Populating metadata catalogs
Related tasks
Creating Adabas tables and views for Classic federation
Creating CA-Datacom tables and views for Classic federation
Creating CA-IDMS tables and views for Classic federation
Creating CICS VSAM tables and views for Classic federation
Creating tables and views for DB2 for z/OS databases
Creating sequential tables and views for Classic federation
Creating VSAM tables and views for Classic federation
Creating indexes
Creating stored procedures
Modifying the PCB selection for IMS tables or indexes
Related information
Views


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Update icon Last updated: 2006-12-15