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MySQL 9.2.0
Source Code Documentation
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Functions | |
double | NumDistinctValues (THD *thd, const Field &field) |
If secondary engine is available, return number of distinct values (NDV) information for specified field. More... | |
If secondary engine is available, return number of distinct values (NDV) information for specified field.
thd | The current thread. |
field | The field we request NDV for |