+* Ensure proper sequencing of view migrations ([#1157](https://github.com/databrickslabs/ucx/issues/1157)). In this release, we have introduced a `views_migrator` module and corresponding test cases to ensure proper sequencing of view migrations, addressing issue [#1132](https://github.com/databrickslabs/ucx/issues/1132). The module contains two main classes: `ViewToMigrate` and `ViewsMigrator`. The former is responsible for parsing a view's SQL text and identifying its dependencies, while the latter sequences views based on their dependencies. The commit also adds a new method, `__hash__`, to the Table class, which returns a hash value of the key of the table, improving the handling of Table objects. Additionally, we have added unit tests and verified the changes on a staging environment. We have also introduced a new file `tables_and_views.json` for unit testing and added a `views_migrator` module that takes a `TablesCrawler` object and returns a sequence of tables (views) that need to be migrated in the correct order. The commit addresses various scenarios such as no views, direct views, indirect views, deep indirect views, invalid SQL, invalid SQL tables, and circular view references. This release is focused on improving the sequencing of view migrations and is accompanied by appropriate tests.
0 commit comments