bk commit into 5.0 tree (anozdrin:1.2125) BUG#18587

[Alexander Nozdrin]

Below is the list of changes that have just been committed into a local
5.0 repository of alik. When alik does a push these changes will
be propagated to the main repository and, within 24 hours after the
push, to the public repository.
For information on how to access the public repository
see http://dev.mysql.com/doc/mysql/en/installing-source-tree.html

ChangeSet
  1.2125 06/05/10 23:16:30 anozdrin@stripped +4 -0
  Fix for BUG#18587: Function that accepts and returns TEXT
  garbles data if longer than 766 chars.
  
  The problem is that a stored routine returns BLOBs to the previous
  caller, BLOBs are shallow-copied (i.e. only pointers to the data are
  copied). The fix is to also copy data of BLOBs.

  sql/item_func.cc
    1.283 06/05/10 23:16:27 anozdrin@stripped +1 -0
    Request copying BLOBs for the result table.

  sql/field_conv.cc
    1.55 06/05/10 23:16:27 anozdrin@stripped +2 -1
    Do not jump to optimization if the field type is BLOB and
    the destination table requires copying of BLOBs.

  mysql-test/t/sp.test
    1.187 06/05/10 23:16:27 anozdrin@stripped +47 -0
    Added a test case for BUG#18587.

  mysql-test/r/sp.result
    1.199 06/05/10 23:16:27 anozdrin@stripped +31 -0
    Updated result file.

# 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:	anozdrin
# Host:	station.home
# Root:	/mnt/raid/MySQL/devel/5.0-bug18587

--- 1.54/sql/field_conv.cc	2006-03-03 14:39:30 +03:00
+++ 1.55/sql/field_conv.cc	2006-05-10 23:16:27 +04:00
@@ -642,7 +642,8 @@
 
 void field_conv(Field *to,Field *from)
 {
-  if (to->real_type() == from->real_type())
+  if (to->real_type() == from->real_type() &&
+      !(to->type() == FIELD_TYPE_BLOB && to->table->copy_blobs))
   {
     if (to->pack_length() == from->pack_length() &&
         !(to->flags & UNSIGNED_FLAG && !(from->flags & UNSIGNED_FLAG)) &&

--- 1.282/sql/item_func.cc	2006-04-26 22:38:46 +04:00
+++ 1.283/sql/item_func.cc	2006-05-10 23:16:27 +04:00
@@ -4735,6 +4735,7 @@
     dummy_table->alias = empty_name;
     dummy_table->maybe_null = maybe_null;
     dummy_table->in_use= current_thd;
+    dummy_table->copy_blobs= TRUE;
     share->table_cache_key = empty_name;
     share->table_name = empty_name;
   }

--- 1.198/mysql-test/r/sp.result	2006-05-09 16:48:19 +04:00
+++ 1.199/mysql-test/r/sp.result	2006-05-10 23:16:27 +04:00
@@ -4929,4 +4929,35 @@
 drop table t3|
 drop view v1|
 drop function bug12472|
+DROP FUNCTION IF EXISTS bug18589_f1|
+DROP PROCEDURE IF EXISTS bug18589_p1|
+DROP PROCEDURE IF EXISTS bug18589_p2|
+CREATE FUNCTION bug18589_f1(arg TEXT) RETURNS TEXT
+BEGIN
+RETURN CONCAT(arg, "");
+END|
+CREATE PROCEDURE bug18589_p1(arg TEXT, OUT ret TEXT)
+BEGIN
+SET ret = CONCAT(arg, "");
+END|
+CREATE PROCEDURE bug18589_p2(arg TEXT)
+BEGIN
+DECLARE v TEXT;
+CALL bug18589_p1(arg, v);
+SELECT v;
+END|
+SELECT bug18589_f1(REPEAT("a", 767))|
+bug18589_f1(REPEAT("a", 767))
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+SET @bug18589_v1 = ""|
+CALL bug18589_p1(REPEAT("a", 767), @bug18589_v1)|
+SELECT @bug18589_v1|
+@bug18589_v1
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+CALL bug18589_p2(REPEAT("a", 767))|
+v
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+DROP FUNCTION bug18589_f1|
+DROP PROCEDURE bug18589_p1|
+DROP PROCEDURE bug18589_p2|
 drop table t1,t2;

--- 1.186/mysql-test/t/sp.test	2006-05-09 16:48:19 +04:00
+++ 1.187/mysql-test/t/sp.test	2006-05-10 23:16:27 +04:00
@@ -5797,6 +5797,53 @@
 
 
 #
+# BUG#18587: Function that accepts and returns TEXT garbles data if longer than
+# 766 chars
+#
+
+# Prepare.
+
+--disable_warnings
+DROP FUNCTION IF EXISTS bug18589_f1|
+DROP PROCEDURE IF EXISTS bug18589_p1|
+DROP PROCEDURE IF EXISTS bug18589_p2|
+--enable_warnings
+
+CREATE FUNCTION bug18589_f1(arg TEXT) RETURNS TEXT
+BEGIN
+  RETURN CONCAT(arg, "");
+END|
+
+CREATE PROCEDURE bug18589_p1(arg TEXT, OUT ret TEXT)
+BEGIN
+  SET ret = CONCAT(arg, "");
+END|
+
+CREATE PROCEDURE bug18589_p2(arg TEXT)
+BEGIN
+  DECLARE v TEXT;
+  CALL bug18589_p1(arg, v);
+  SELECT v;
+END|
+
+# Test case.
+
+SELECT bug18589_f1(REPEAT("a", 767))|
+
+SET @bug18589_v1 = ""|
+CALL bug18589_p1(REPEAT("a", 767), @bug18589_v1)|
+SELECT @bug18589_v1|
+
+CALL bug18589_p2(REPEAT("a", 767))|
+
+# Cleanup.
+
+DROP FUNCTION bug18589_f1|
+DROP PROCEDURE bug18589_p1|
+DROP PROCEDURE bug18589_p2|
+
+
+#
 # BUG#NNNN: New bug synopsis
 #
 #--disable_warnings