bk commit into 5.0 tree (evgen:1.2253) BUG#20825

[eugene]

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ChangeSet@stripped, 2006-09-15 20:03:49+04:00, evgen@stripped +3 -0
  Fixed bug#20825: rollup puts non-equal values together
  
  Fix for bug 7894 replaces a field in a non-aggregate function with a item
  reference if such a field was specified in the GROUP BY clause in order to
  get a correct result.
  When ROLLUP is involved this lead to a wrong result due to value of a such
  field is got through a copy function and copying happens after the function
  evaluation.
  Such replacement isn't needed if that field is also specified in the select
  list.
  
  The change_group_ref() function now doesn't substitute a field with a
  reference if the field is specified in the select list.

  mysql-test/r/olap.result@stripped, 2006-09-15 20:02:22+04:00, evgen@stripped +9 -0
    Added the test case for bug#20825: rollup puts non-equal values together

  mysql-test/t/olap.test@stripped, 2006-09-15 20:01:52+04:00, evgen@stripped +8 -0
    Added the test case for bug#20825: rollup puts non-equal values together

  sql/sql_select.cc@stripped, 2006-09-15 20:02:39+04:00, evgen@stripped +1 -1
    Fixed bug#20825: rollup puts non-equal values together
    The change_group_ref() function now doesn't substitute a field with a
    reference if the field is specified in the select list.

# 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:	evgen
# Host:	moonbone.local
# Root:	/work/20825-bug-5.0-opt-mysql

--- 1.447/sql/sql_select.cc	2006-09-15 20:03:54 +04:00
+++ 1.448/sql/sql_select.cc	2006-09-15 20:03:54 +04:00
@@ -13730,7 +13730,7 @@
         ORDER *group_tmp;
         for (group_tmp= group_list; group_tmp; group_tmp= group_tmp->next)
         {
-          if (item->eq(*group_tmp->item,0))
+          if (item->eq(*group_tmp->item,0) && !group_tmp->counter_used)
           {
             Item *new_item;
             if (!(new_item= new Item_ref(context, group_tmp->item, 0,

--- 1.33/mysql-test/r/olap.result	2006-09-15 20:03:54 +04:00
+++ 1.34/mysql-test/r/olap.result	2006-09-15 20:03:54 +04:00
@@ -630,3 +630,12 @@
 NULL	NULL	2
 DROP VIEW v1;
 DROP TABLE t1;
+create table t1 (a varchar(22) not null , b int);
+insert into t1 values ("2006-07-01 21:30", 1), ("2006-07-01 23:30", 10);
+select left(a,10), a, sum(b) from t1 group by 1,2 with rollup;
+left(a,10)	a	sum(b)
[phone]-01 21:30	1
[phone]-01 23:30	10
[phone]	NULL	11
+NULL	NULL	11
+drop table t1;

--- 1.25/mysql-test/t/olap.test	2006-09-15 20:03:54 +04:00
+++ 1.26/mysql-test/t/olap.test	2006-09-15 20:03:54 +04:00
@@ -319,3 +319,11 @@
 DROP VIEW v1;
 DROP TABLE t1;
 # End of 4.1 tests
+
+#
+# Bug #20825: rollup puts non-equal values together
+#
+create table t1 (a varchar(22) not null , b int);
+insert into t1 values ("2006-07-01 21:30", 1), ("2006-07-01 23:30", 10);
+select left(a,10), a, sum(b) from t1 group by 1,2 with rollup;
+drop table t1;