From: Date: May 7 2007 9:24pm
Subject: bk commit into 5.0 tree (gshchepa:1.2469) BUG#27954
List-Archive: http://lists.mysql.com/commits/26241
X-Bug: 27954
Message-Id: <20070507192431.4D93F3D4088@localhost.localdomain>

Below is the list of changes that have just been committed into a local
5.0 repository of uchum. When uchum 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@stripped, 2007-05-08 00:24:25+05:00, gshchepa@stripped +4 -0
  Fixed bug #27954.
  This bug affects multi-row INSERT ... ON DUPLICATE into table
  with PRIMARY KEY of AUTO_INCREMENT field and some additional UNIQUE indices.
  If the first row in multi-row INSERT contains duplicated values of UNIQUE
  indices, then following rows of multi-row INSERT (with either duplicated or
  unique key field values) may me applied to _arbitrary_ records of table as
  updates.
  This bug was introduced in 5.0. Related code was widely rewritten in 5.1, and
  5.1 is already free of this problem. 4.1 was not affected too.
  
  When updating the row during INSERT ON DUPLICATE KEY UPDATE, we called
  restore_auto_increment(), which set next_insert_id back to 0, but we
  forgot to set clear_next_insert_id back to 0.
  restore_auto_increment() function has been fixed.

  mysql-test/r/insert_update.result@stripped, 2007-05-08 00:20:42+05:00, gshchepa@stripped +22 -0
    Added test case for bug #27954.

  mysql-test/t/insert_update.test@stripped, 2007-05-08 00:20:34+05:00, gshchepa@stripped +17 -0
    Added test case for bug #27954.

  sql/handler.cc@stripped, 2007-05-08 00:12:13+05:00, gshchepa@stripped +7 -0
    Fixed bug #27954.
    When updating the row during INSERT ON DUPLICATE KEY UPDATE, we called
    restore_auto_increment(), which set next_insert_id back to 0, but we
    forgot to set clear_next_insert_id back to 0.
    restore_auto_increment() function has been fixed.

  sql/sql_class.h@stripped, 2007-05-08 00:10:29+05:00, gshchepa@stripped +4 -0
    Fixed bug #27954.
    Added commentary for THD::clear_next_insert_id variable.

# 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:	gshchepa
# Host:	gleb.loc
# Root:	/home/uchum/work/bk/mysql-5.0-opt-27954

--- 1.232/sql/handler.cc	2007-04-12 14:46:06 +05:00
+++ 1.233/sql/handler.cc	2007-05-08 00:12:13 +05:00
@@ -1685,7 +1685,14 @@ void handler::restore_auto_increment()
 {
   THD *thd= table->in_use;
   if (thd->next_insert_id)
+  {
     thd->next_insert_id= thd->prev_insert_id;
+    if (thd->next_insert_id == 0)
+    {
+      /* we didn't generate a value, engine will be called again */
+      thd->clear_next_insert_id= 0;
+    }
+  }
 }
 
 

--- 1.328/sql/sql_class.h	2007-04-03 16:55:14 +05:00
+++ 1.329/sql/sql_class.h	2007-05-08 00:10:29 +05:00
@@ -1431,6 +1431,10 @@ public:
   */
   bool       insert_id_used;
 
+  /* 
+    clear_next_insert_id is set if engine was called at least once
+    for this statement to generate auto_increment value.
+  */
   bool       clear_next_insert_id;
   /* for IS NULL => = last_insert_id() fix in remove_eq_conds() */
   bool       substitute_null_with_insert_id;

--- 1.24/mysql-test/r/insert_update.result	2007-03-30 19:11:59 +05:00
+++ 1.25/mysql-test/r/insert_update.result	2007-05-08 00:20:42 +05:00
@@ -336,3 +336,25 @@ id	f1
 0	test1
 DROP TABLE t1;
 SET SQL_MODE='';
+CREATE TABLE t1 (
+id INT AUTO_INCREMENT PRIMARY KEY,
+c1 CHAR(1) UNIQUE KEY,
+cnt INT DEFAULT 1
+);
+INSERT INTO t1 (c1) VALUES ('A'), ('B'), ('C');
+SELECT * FROM t1;
+id	c1	cnt
+1	A	1
+2	B	1
+3	C	1
+INSERT  INTO t1 (c1) VALUES ('A'), ('X'), ('Y'), ('Z')
+ON DUPLICATE KEY UPDATE cnt=cnt+1;
+SELECT * FROM t1;
+id	c1	cnt
+1	A	2
+2	B	1
+3	C	1
+4	X	1
+5	Y	1
+6	Z	1
+DROP TABLE t1;

--- 1.24/mysql-test/t/insert_update.test	2007-03-30 19:12:01 +05:00
+++ 1.25/mysql-test/t/insert_update.test	2007-05-08 00:20:34 +05:00
@@ -247,3 +247,20 @@ REPLACE INTO t1 VALUES (0,"test1",null);
 SELECT id, f1 FROM t1;
 DROP TABLE t1;
 SET SQL_MODE='';
+
+#
+# Bug#27954: multi-row INSERT ... ON DUPLICATE with duplicated
+# row at the first place into table with AUTO_INCREMENT and
+# additional UNIQUE key.
+#
+CREATE TABLE t1 (
+  id INT AUTO_INCREMENT PRIMARY KEY,
+  c1 CHAR(1) UNIQUE KEY,
+  cnt INT DEFAULT 1
+);
+INSERT INTO t1 (c1) VALUES ('A'), ('B'), ('C');
+SELECT * FROM t1;
+INSERT  INTO t1 (c1) VALUES ('A'), ('X'), ('Y'), ('Z')
+  ON DUPLICATE KEY UPDATE cnt=cnt+1;
+SELECT * FROM t1;
+DROP TABLE t1;