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Fixed bug #16081: row equalities were not taken into

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account by the optimizer.
Now all row equalities are converted into conjunctions of
equalities between row elements. They are taken into account
by the optimizer together with the original regular equality
predicates.


mysql-test/r/join_outer.result:
  Adjusted results after fix for bug #16081.
mysql-test/r/row.result:
  Added a test cases for bug #16081.
mysql-test/t/row.test:
  Added a test cases for bug #16081.
sql/sql_list.h:
  Corrected the copy constructor for the class base_list.
  The previous implementation resulted in creation of an
  inconsistent base_list if the source list was empty.
This commit is contained in:
unknown
2006-09-01 04:23:04 -07:00
parent 75865af64b
commit a53f3d0f1a
5 changed files with 500 additions and 176 deletions
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mysql-test/r/join_outer.result
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@ -1126,7 +1126,7 @@ a b a b
7 8 7 5
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a = t2.a OR t1.a = t2.b;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 4 Using where
1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 4
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.a = t2.a WHERE t1.a IN(t2.a, t2.b);
id select_type table type possible_keys key key_len ref rows Extra