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FIxed bug #14927.

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A query with a group by and having clauses could return a wrong
result set if the having condition contained a constant conjunct 
evaluated to FALSE.
It happened because the pushdown condition for table with
grouping columns lost its constant conjuncts.
Pushdown conditions are always built by the function make_cond_for_table
that ignores constant conjuncts. This is apparently not correct when
constant false conjuncts are present.
This commit is contained in:
igor@rurik.mysql.com
2006-01-31 21:48:32 -08:00
parent 7e5108392d
commit d6370b48a7
6 changed files with 57 additions and 11 deletions
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2
sql/sql_lex.cc
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@@ -1074,6 +1074,7 @@ void st_select_lex::init_query()
item_list.empty();
join= 0;
where= 0;
having= 0;
olap= UNSPECIFIED_OLAP_TYPE;
having_fix_field= 0;
resolve_mode= NOMATTER_MODE;
@@ -1081,6 +1082,7 @@ void st_select_lex::init_query()
ref_pointer_array= 0;
select_n_having_items= 0;
prep_where= 0;
prep_having= 0;
subquery_in_having= explicit_limit= 0;
parsing_place= NO_MATTER;
is_item_list_lookup= 0;