Answer / guest

Cause: Export was able export statistics, but the statistics
may not be usuable. The statistics are questionable because
one or more of the following happened during export: a row
error occurred, client character set or NCHARSET does not
match with the server, a query clause was specified on
export, only certain partitions or subpartitions were
exported, or a fatal error occurred while processing a table.

Action: To export non-questionable statistics, change the
client character set or NCHARSET to match the server, export
with no query clause, export complete tables. If desired,
import parameters can be supplied so that only
non-questionable statistics will be imported, and all
questionable statistics will be recalculated.

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