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I tried adding a column to a table which is used in a materialized view and received the error Cannot drop or modify object '%1' because at least one other object ( %2 '%3') depends upon it In the remarks it says that this is expected for "...a materialized view, that cannot be automatically invalidated." So, what are the criterias which prevent a materialized view from being automatically invalidated? |
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SQL Anywhere does not have a mechanism for automatically invalidating/re-materializing any materialized view when an underlying base table is modified. So it's not a question of which materialized views can or cannot be automatically invalidated; none of them can. SQL Anywhere does, however, have the ability to automatically invalidate and re-establish ordinary views. |
