Quill v3.18.0 release notes

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- As a result of 2504, the handling of optional-product rows (technically parts of rows) is now different. Whereas before, if any non-optional column of an optional-product row was null, then entre optional-product would be null. Now however, an optional-product will only be null if every column inside is null. For example, before, if a query returning Person(name:Option(Name(first:String, last:String)), age: Int) resulted in the row ResultRow("Joe", null, 123) before the entity would be decoded into Person(None, 123) (i.e. the optional-product Option[Name] would decode to None). Now however, Option[Name] only decodes to None if every column inside it is null. This means that the ResultRow("Joe", null, 123) decodes to Person(Name("Joe", 0 /*default-placeholder for null*/), 123). Only when the both first and last columns in Name are null i.e. ResultRow(null, null, 123) will the result be: Person(None, 123). Have a look at the PR 2504 as well as it's corresponding issue 2505 for more details on how this works and the rationale for it.