An attempt to alter the schema defined for a table or view requires that the database server consider if there are dependent views impacted by the change. Examples of schema-altering operations include:
Dropping a table, view, materialized view, or column
Renaming a table, view, materialized view, or column
Adding, dropping, or altering columns
Altering a column's data type, size, or nullability
Disabling views or table view dependencies
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