In schema.rb there indices are shown. During an upgrade a functional index has been reduced to an index on a column. Since I am not sure how they are used I wonder if this can cause problems later on.
I assume this could make problems in a re-initialized database for example when testing. Is there another use case? This Upgrade was from Rails 4 to Rails 6. Did something change here?
In the Rails framework, the schema.rb file contains the definition of your database schema, including the tables, columns, and indices. During an upgrade from Rails 4 to Rails 6, it’s possible that some changes occurred in the way indices are defined, which could lead to potential issues when using a re-initialized database or during testing.
Yes, reducing a functional index to a column index may cause problems, especially if the original index served specific queries. In the upgrade from Rails 4 to Rails 6, there may be changes in how indices are handled. Thorough testing is essential to ensure that performance and functionality remain intact.
You’ve mentioned that during the upgrade, a functional index was reduced to an index on a column. This means that a previously existing index that used a function to index data has been changed to a simple index on a single column. Functional indexes are used to index the result of an expression or function applied to the data, while column indexes index the values in a specific column directly.
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