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`0' failed
In file sql/opt_range.cc,when calculate_cond_selectivity_for_table() is called with optimizer_use_condition_selectivity=4 then
- thd->no_errors is set to 1
- the original value of thd->no_error is not restored to its original value
- this is causing the assertion to fail in the subsequent queries
Fixed by restoring the original value of thd->no_errors
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In the function create_key_parts_for_pseudo_indexes()
the key part structures of pseudo-indexes created for
BLOB fields were set incorrectly.
Also the key parts for long fields must be 'truncated'
up to the maximum length acceptable for key parts.
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10.0.15+maria-1~wheezy
Add a testcase. The bug itself was fixed by the fix for MDEV-7316.
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- When EITS code calls store_key_image_to_rec(), it should follow its
calling convention (which is counter-intuitive)
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optimizer_use_condition_selectivity >=3
- Fix the crash by making get_column_range_cardinality()
to handle the special case where Column_stats objects
is an all-zeros object (the question of what is the point
of having Field::read_stats point to such object remains a
mystery)
- Added a few comments. Learning the code still.
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Fix a trivial typo: in table_multi_eq_cond_selectivity(), reset the loop variable
between loops.
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