bk commit into 5.0 tree (evgen:1.1943) BUG#7422

[eugene]

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5.0 repository of evgen. When evgen does a push these changes will
be propagated to the main repository and, within 24 hours after the
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ChangeSet
  1.1943 05/06/17 20:30:00 evgen@stripped +3 -0
  Fix bug #7422 "order by" doesn't work
  
  Field with wrong buffer was used to make sort key, which results in producing
  same sort key for all records.
  

  mysql-test/r/view.result
    1.82 05/06/17 20:19:14 evgen@stripped +19 -0
    Test case for bug#7422 "order by" doesn't work

  mysql-test/t/view.test
    1.71 05/06/17 20:18:19 evgen@stripped +13 -0
    Test case for bug#7422 "order by" doesn't work

  sql/filesort.cc
    1.103 05/06/17 19:59:55 evgen@stripped +22 -4
    Fix bug#7422 "order by" doesn't work

# 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/mysql-5.0-bug-7422

--- 1.102/sql/filesort.cc	2005-04-07 20:24:08 +04:00
+++ 1.103/sql/filesort.cc	2005-06-17 19:59:55 +04:00
@@ -631,7 +631,12 @@
 	    *to++=1;
 	  /* All item->str() to use some extra byte for end null.. */
 	  String tmp((char*) to,sort_field->length+4,cs);
-	  String *res=item->val_str(&tmp);
+          String *res;
+          if (item->type() == Item::REF_ITEM &&
((Item_ref*)item)->result_field)
+            res= ((Item_ref*)item)->result_field->val_str(&tmp);
+          else
+            res= item->val_str(&tmp);
+
 	  if (!res)
 	  {
 	    if (maybe_null)
@@ -673,7 +678,12 @@
 	}
       case INT_RESULT:
 	{
-	  longlong value=item->val_int();
+          longlong value;
+          if (item->type() == Item::REF_ITEM &&
((Item_ref*)item)->result_field)
+            value= ((Item_ref*)item)->result_field->val_int();
+          else
+            value= item->val_int();
+          
 	  if (maybe_null)
           {
 	    *to++=1;				/* purecov: inspected */
@@ -715,7 +725,11 @@
 	}
       case DECIMAL_RESULT:
         {
-          my_decimal dec_buf, *dec_val= item->val_decimal(&dec_buf);
+          my_decimal dec_buf, *dec_val;
+          if (item->type() == Item::REF_ITEM &&
((Item_ref*)item)->result_field)
+            dec_val= ((Item_ref *)item)->result_field->val_decimal(&dec_buf);
+          else
+            dec_val= item->val_decimal(&dec_buf);
           if (maybe_null)
           {
             if (item->null_value)
@@ -733,7 +747,11 @@
         }
       case REAL_RESULT:
 	{
-	  double value= item->val_real();
+          double value;
+          if (item->type() == Item::REF_ITEM &&
((Item_ref*)item)->result_field)
+            value= ((Item_ref*)item)->result_field->val_real();
+          else
+            value= item->val_real();
 	  if (maybe_null)
           {
             if (item->null_value)

--- 1.81/mysql-test/r/view.result	2005-05-17 19:05:06 +04:00
+++ 1.82/mysql-test/r/view.result	2005-06-17 20:19:14 +04:00
@@ -1726,3 +1726,22 @@
 drop procedure p1;
 drop view v1;
 drop table t1;
+DROP TABLE IF EXISTS t1, t2, v;
+Warnings:
+Note	1051	Unknown table 't1'
+Note	1051	Unknown table 't2'
+Note	1051	Unknown table 'v'
+CREATE TABLE t1(a char(2) primary key, b char(2));
+CREATE TABLE t2(a char(2), b char(2), index i(a));
+INSERT INTO t1 VALUES ('a','1'), ('b','2');
+INSERT INTO t2 VALUES ('a','5'), ('a','6'), ('b','5'), ('b','6');
+CREATE VIEW v AS
+SELECT t1.b as c, t2.b as d FROM t1,t2 WHERE t1.a=t2.a;
+SELECT d, c FROM v ORDER BY d;
+d	c
+5	1
+5	2
+6	1
+6	2
+DROP VIEW v;
+DROP TABLE t1, t2;

--- 1.70/mysql-test/t/view.test	2005-05-17 19:05:06 +04:00
+++ 1.71/mysql-test/t/view.test	2005-06-17 20:18:19 +04:00
@@ -1569,3 +1569,16 @@
 drop view v1;
 drop table t1;
 
+#
+# Bug#7422 "order by" doesn't work
+#
+DROP TABLE IF EXISTS t1, t2, v;
+CREATE TABLE t1(a char(2) primary key, b char(2));
+CREATE TABLE t2(a char(2), b char(2), index i(a));
+INSERT INTO t1 VALUES ('a','1'), ('b','2');
+INSERT INTO t2 VALUES ('a','5'), ('a','6'), ('b','5'), ('b','6');
+CREATE VIEW v AS
+  SELECT t1.b as c, t2.b as d FROM t1,t2 WHERE t1.a=t2.a;
+SELECT d, c FROM v ORDER BY d;
+DROP VIEW v;
+DROP TABLE t1, t2;