[release/6.0] Add more cast nodes in multi-line breaks during migrations #28576
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Resolves #27206
Description
In migrations we generate SQL literal for string constant for default value and other seed data. When the data has line breaks we expand it out in Concat. While expanding in to Concat we need to inject cast to
nvarchar(max)
to avoid truncation of data.Customer impact
Customers with large text containing multiple line breaks will see data truncated.
How found
Customer reported on 6.0
Regression
No.
Testing
Added tests for affected scenario.
Risk
Low. Also added quirk to revert back to older behavior.
This is port of #28064 which is already fixed in main.