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MDEV-14440: Assertion `inited==RND' failed in handler::ha_rnd_end

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In the function QUICK_RANGE_SELECT::init_ror_merged_scan we create a seperate handler if the handler in
head->file cannot be reused. The flag free_file tells us if we have a seperate handler or not.
There are cases where you might create a handler and then there might be a failure(running ALTER)
and then we have to revert the handler back to the original one. The code does that
but it does not reset the flag 'free_file' in this case.
Also backported f2c418079d.
This commit is contained in:
Varun Gupta
2019-01-17 22:56:12 +02:00
parent 19a7656fb1
commit 2061e00c20
3 changed files with 52 additions and 0 deletions
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sql/opt_range.cc
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@ -2161,6 +2161,7 @@ failure:
head->column_bitmaps_set(save_read_set, save_write_set);
delete file;
file= save_file;
free_file= false;
DBUG_RETURN(1);
}
@ -7140,6 +7141,8 @@ TRP_ROR_INTERSECT *get_best_ror_intersect(const PARAM *param, SEL_TREE *tree,
if (ror_intersect_add(intersect, cpk_scan, TRUE) &&
(intersect->total_cost < min_cost))
intersect_best= intersect; //just set pointer here
else
cpk_scan= 0; // Don't use cpk_scan
}
else
cpk_scan= 0; // Don't use cpk_scan