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5.2. Adding Notes to Access Log Entries
When the backend database processes a search operation, it attempts to use indexes to narrow down the list of candidates matching the search criteria. If the back-end is unable to use indexes, it appends the following string to the access log entry for the search:
notes="U"
This note indicates that an unindexed search was performed.
If you are writing your own backend database search function, you can append this note to access log entries by setting the
SLAPI_OPERATION_NOTES parameter to the flag SLAPI_OP_NOTE_UNINDEXED. This parameter identifies any notes that need to be appended to access log entries. Currently, SLAPI_OP_NOTE_UNINDEXED is the only value that you can set for this parameter. In future releases, additional flags will be defined. You will be able to use bitwise OR combinations of flags to specify different combinations of notes.
The server appends these notes and writes out the access log entries whenever sending a result or search entry back to the client.

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