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Backporting from 10.4 to 10.3: MDEV-17325 NULL-ability problems with LEAST() in combination with NO_ZERO_DATE and NO_ZERO_IN_DATE

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This also fixes:
MDEV-17299 Assertion `maybe_null' failed in make_sortkey

Note, during merge of the 10.1 version of MDEV-17299,
please use the 10.3 version of the code (i.e. null merge the 10.1 version).
This commit is contained in:
Alexander Barkov
2019-04-20 00:11:50 +04:00
parent 42c58b87da
commit f4019f5b35
6 changed files with 309 additions and 1 deletions
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2
sql/sql_type.h
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@ -2138,6 +2138,8 @@ public:
Item *source_expr, Item *source_const) const;
bool subquery_type_allows_materialization(const Item *inner,
const Item *outer) const;
bool Item_func_min_max_fix_attributes(THD *thd, Item_func_min_max *func,
Item **items, uint nitems) const;
bool Item_sum_hybrid_fix_length_and_dec(Item_sum_hybrid *func) const;
bool Item_sum_sum_fix_length_and_dec(Item_sum_sum *) const;
bool Item_sum_avg_fix_length_and_dec(Item_sum_avg *) const;