Building a design

After you have created design tables and loaded data into them, and then specified the parameters you want Database Designer to use when creating the physical schema, direct Database Designer to create the scripts necessary to build the design.

When you build a database design, Vertica generates two scripts:

• Deployment script: design-name_deploy.sql—Contains the SQL statements that create projections for the design you are deploying, deploy the design, and drop unused projections. When the deployment script runs, it creates the optimized design. For details about how to run this script and deploy the design, see Deploying a Design.

• Design script: design-name_design.sql—Contains the CREATE PROJECTION statements that Database Designeruses to create the design. Review this script to make sure you are happy with the design.

  The design script is a subset of the deployment script. It serves as a backup of the DDL for the projections that the deployment script creates.

When you create a design using Management Console:

• If you submit a large number of queries to your design and build it right immediately, a timing issue could cause the queries not to load before deployment starts. If this occurs, you might see one of the following errors:

  • No queries to optimize for

  • No tables to design projections for

  To accommodate this timing issue, you may need to reset the design, check the Queries tab to make sure the queries have been loaded, and then rebuild the design. Detailed instructions are in:

  • Using the wizard to create a design
  • Creating a design manually

• The scripts are deleted when deployment completes. To save a copy of the deployment script after the design is built but before the deployment completes, go to the Output window and copy and paste the SQL statements to a file.