Commit 265814f2 authored by Neeraj Bisht's avatar Neeraj Bisht

Bug#16208709 - CRASH IN GET_SEL_ARG_FOR_KEYPART ON SELECT DISTINCT

	       ON COL WITH COMPOSITE INDEX

This problem is caused by the patch for the bug#11751794.
While checking for the keypart covering non grouping attribute. we are not 
checking whether the root node of the SEL_ARG* tree for the index have any 
cvalue or not.
parent d1378565
......@@ -9870,6 +9870,8 @@ get_sel_arg_for_keypart(Field *nga_field,
SEL_ARG *keypart_tree,
SEL_ARG **cur_range)
{
if(keypart_tree == NULL)
return false;
if(keypart_tree->field->eq(nga_field))
{
/*
......
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