For information about External-to-Internal (E2I) conversions and how exceptions are handled in sessions where Unicode Pass Through is enabled, see Importing Unicode Characters in a Pass Through Session.
E2I conversion generates an exception when a character in the client repertoire cannot be converted to the server repertoire.
For example, an attempt to insert a non-Latin character into a character column where the server character set is LATIN generates a conversion exception.
E2I conversion exceptions generate an SQL error.