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Provide FIELDPROC_ENCODED_COMPARISON QAQQINI function at column level
DB2 for i Field Procedures are primarily used for column level encryption. The defacto standard for encryption is AES. Ideally, encryption should not be deterministic. In other words, encrypting the same plain text multiple times should produce different results each time with each distinct cipher text value still decrypting to the same plain text value. However, the FIELDPROC_ENCODED_COMPARISON setting is typically set to *ALLOW_EQUAL, so that indexed field equal lookups perform well, avoiding a table scan by allowing the lookup key to be encrypted and the cipher text used as the lookup key. The setting is scoped at best to a Job level, which does not allow different encrypted columns to have different settings. Ideally, a 'lookup' column would like to use *ALLOW_EQUAL to lean toward the performance side of the trade off, but other fields (like an encrypted BLOB medical image) would benefit from *NONE allowing the field procedure to have a non-deterministic encryption for the field.
Please enhance the field proc option 8 processing to allow specification of the FIELDPROC_ENCODED_COMPARISON attribute on a per field basis.
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