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RDBPROD: How To Convert DEC-MCS Undefined Characters To UTF8 (Doc ID 437289.1)

Last updated on APRIL 14, 2022

Applies to:

Oracle Rdb Server on OpenVMS - Version 7.1 and later
HP OpenVMS Itanium
HP OpenVMS Alpha


Migrating from Oracle Rdb to Oracle Rdbms.

Data inserted into an Oracle Rdb database, using a character set incompatible with DEC-MCS, may not store some characters exactly as expected.

Attempts to move the data from an Oracle Rdb DEC-MCS character set to an Oracle Rdbms UTF8 character set result in some characters being inserted as "?".   This occurs because DEC-MCS did not recognize the original character, and converted it as 'undefined', or "?" (DEC-MCS: 3F hex, decimal 63).

An example of this would be the 'en/em dash' (decimal 150/151)


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