Trigger updating another table
The database consists of catalogs plus authorizations.A catalog contains schemas, and schemas contain the objects that contain data or govern the data.To do this manually, you not only have to remember which resources were changed, you also have to know what the original settings were.When you provision your infrastructure with AWS Cloud Formation, the AWS Cloud Formation template describes exactly what resources are provisioned and their settings.New schemas and schema objects can be defined and used in the PUBLIC schema, as well as any new schema that is created by the user. Hyper SQL allows all schemas to be dropped, except the schema that is the default initial schema for new sessions (by default, the PUBLIC schema). CASCADE statement will succeed but will result in an empty schema, rather than no schema.The statements for setting the initial schema for users are described in the Statements for Authorization and Access Control chapter. The name belongs to the name-space for the particular kind of schema object. For example, each schema has a separate name-space for TRIGGER objects. Each table has a name-space for the names of its columns. However, when they are referenced in a statement, no schema prefix is necessary.Each catalog contains a special schema called INFORMATION_SCHEMA.This schema is read-only and contains some views and other schema objects. The catalog name has no relation to the file name of the database. Schema objects are database objects that contain data or govern or perform operations on data.
A template describes all of your resources and their properties.Not only do you need to record all the resources that your application requires, but you must also provision and configure those resources in each region.When you use AWS Cloud Formation, you can reuse your template to set up your resources consistently and repeatedly.If at any point you need to reverse changes to your infrastructure, you can use a previous version of your template.
Permission is granted to distribute this document without any alteration under the terms of the HSQLDB license.Just describe your resources once and then provision the same resources over and over in multiple regions.In some cases, you might have underlying resources that you want to upgrade incrementally.AWS Cloud Formation is a service that helps you model and set up your Amazon Web Services resources so that you can spend less time managing those resources and more time focusing on your applications that run in AWS.