This does not cover data migration from a previous system into FOLIO!
Requirements:
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Once our first customers "go-live" and load data into the system, breaking schema changes will need to be handled w/o "starting fresh" or manually intervention.
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Since the enumerator has the same representation DB as a string value, the queries from 1.1 and 1.2 are relevant to it. Enumerator element can be removed by analogy with the string representation with using query from Snippet 1.2. And the renaming of the enumerator element can be provided by using the query from Snippet 1.4.
1.5
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AÂ unique index has been created on a field
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It might have that field which should become unique is repeated. An error will occur when trying to create a unique index for this field. That is why it is necessary to ensure uniqueness of this field.
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