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Fix for the previous cset: make first_explain_order_tab handle degenerate joins

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Sergei Petrunia 2016-08-10 01:13:09 +03:00
commit e20e28bd2e
1 changed files with 2 additions and 0 deletions
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2
sql/sql_select.cc
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@ -8365,6 +8365,8 @@ JOIN_TAB *first_explain_order_tab(JOIN* join)
{
JOIN_TAB* tab;
tab= join->join_tab;
if (!tab)
return NULL; /* Can happen when when the tables were optimized away */
return (tab->bush_children) ? tab->bush_children->start : tab;
}