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Datical DB has its own error-handling that wraps SQL scripts. Specifying error-handling within the statements is not necessary.
Deployment Packager fails with an error if it encounters statements before an object definition . for scripts in a stored logic folders or where packageMethod is defined as packageMethod=STOREDLOGIC.
See also these pages for overview of packaging workflows, which packaging methods or folders to use for which types of changes, and SQL Parser for Oracle:
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