Oracle Caching Limitations

If the same Oracle database instance is acting as the source of and target for your cached data:

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LONG and LONG RAW data types. SQL*Plus is unable to SELECT a LONG RAW column. To work around the issue, you can convert the LONG RAW data types to BLOB.

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INTERVAL DAY TO SECOND and INTERVAL YEAR TO MONTH lose precision when they are cached using INSERT and SELECT statements.