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Fix for bug #3874 (Group by field is not considered)

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hf@deer.(none)
2005-10-13 19:23:52 +05:00
parent 58c64aea92
commit c933505d2d
3 changed files with 58 additions and 1 deletions
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2
sql/sql_select.cc
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@ -3115,7 +3115,7 @@ eq_ref_table(JOIN *join, ORDER *start_order, JOIN_TAB *tab)
tab->cached_eq_ref_table=1;
if (tab->type == JT_CONST) // We can skip const tables
return (tab->eq_ref_table=1); /* purecov: inspected */
if (tab->type != JT_EQ_REF)
if (tab->type != JT_EQ_REF || tab->table->maybe_null)
return (tab->eq_ref_table=0); // We must use this
Item **ref_item=tab->ref.items;
Item **end=ref_item+tab->ref.key_parts;