bk commit into 5.0 tree (igor:1.2133) BUG#19490

[igor]

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ChangeSet
  1.2133 06/05/12 18:24:38 igor@stripped +3 -0
  Fixed bug #19490. The bug that caused server crash manifested
  itself when executing queries referring to a view with GROUP BY
  an expression containing non-constant interval.
  It happened because Item_date_add_interval::eq neglected the
  fact that the method can be applied to an expression of the form
      date(col) + interval time_to_sec(col) second
  at the time when col could not be evaluated yet.
  An attempt to evaluate time_to_sec(col) in this method resulted
  in a crash.

  sql/item_timefunc.cc
    1.110 06/05/12 18:24:31 igor@stripped +7 -2
    Fixed bug #19490. The bug that caused server crash manifested
    itself when executing queries referring to a view with GROUP BY
    an expression containing non-constant interval.
    It happened because Item_date_add_interval::eq neglected the
    fact that the method can be applied to an expression of the form
        date(col) + interval time_to_sec(col) second
    at the time when col could not be evaluated yet.
    An attempt to evaluate time_to_sec(col) in this method resulted
    in a crash.
    The code of Item_date_add_interval::eq was corrected.

  mysql-test/t/view.test
    1.143 06/05/12 18:24:31 igor@stripped +16 -0
    Added a test case for bug #19490.

  mysql-test/r/view.result
    1.156 06/05/12 18:24:31 igor@stripped +11 -0
    Added a test case for bug #19490.

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	igor
# Host:	rurik.mysql.com
# Root:	/home/igor/dev/mysql-5.0-2

--- 1.109/sql/item_timefunc.cc	2006-05-10 06:24:29 -07:00
+++ 1.110/sql/item_timefunc.cc	2006-05-12 18:24:31 -07:00
@@ -2144,8 +2144,13 @@
   Item_date_add_interval *other= (Item_date_add_interval*) item;
 
   if ((int_type != other->int_type) ||
-      (!args[0]->eq(other->args[0], binary_cmp)) ||
-      (get_interval_value(args[1], int_type, &val, &interval)))
+      (!args[0]->eq(other->args[0], binary_cmp)))
+    return FALSE;
+
+  if (!args[1]->const_item() || !other->args[1]->const_item())
+    return (args[1]->eq(other->args[1], binary_cmp)); 
+
+  if (get_interval_value(args[1], int_type, &val, &interval))
     return FALSE;
 
   val= other->value;

--- 1.155/mysql-test/r/view.result	2006-05-11 05:30:49 -07:00
+++ 1.156/mysql-test/r/view.result	2006-05-12 18:24:31 -07:00
@@ -2649,3 +2649,14 @@
 2006-01-01 03:00:00
 drop view v1, v2;
 drop table t1;
+CREATE TABLE t1 (id int NOT NULL PRIMARY KEY, d datetime);
+CREATE VIEW v1 AS
+SELECT id, date(d) + INTERVAL TIME_TO_SEC(d) SECOND AS t, COUNT(*)
+FROM t1 GROUP BY id, t;
+SHOW CREATE VIEW v1;
+View	Create View
+v1	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `t1`.`id` AS `id`,(cast(`t1`.`d` as date) + interval time_to_sec(`t1`.`d`) second) AS `t`,count(0) AS `COUNT(*)` from `t1` group by `t1`.`id`,(cast(`t1`.`d` as date) + interval time_to_sec(`t1`.`d`) second)
+SELECT * FROM v1;
+id	t	COUNT(*)
+DROP VIEW v1;
+DROP TABLE t1;

--- 1.142/mysql-test/t/view.test	2006-04-22 00:54:21 -07:00
+++ 1.143/mysql-test/t/view.test	2006-05-12 18:24:31 -07:00
@@ -2512,3 +2512,19 @@
 select * from v2;
 drop view v1, v2;
 drop table t1;
+
+#
+# Bug #19490: usage of view specified by a query with GROUP BY
+#             an expression containing non-constant interval
+
+CREATE TABLE t1 (id int NOT NULL PRIMARY KEY, d datetime);
+
+CREATE VIEW v1 AS
+SELECT id, date(d) + INTERVAL TIME_TO_SEC(d) SECOND AS t, COUNT(*)
+  FROM t1 GROUP BY id, t;
+
+SHOW CREATE VIEW v1;
+SELECT * FROM v1;
+
+DROP VIEW v1;
+DROP TABLE t1;