Fix for the previous cset: make first_explain_order_tab handle degenerate joins

e20e28bd · Sergei Petrunia · a2f245e4 · e20e28bd
Commit e20e28bd authored Aug 10, 2016 by Sergei Petrunia
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sql/sql_select.cc sql/sql_select.cc +2 -0

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--- a/sql/sql_select.cc
+++ b/sql/sql_select.cc
@@ -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;
 }