Merge mysql.com:/opt/local/work/mysql-4.1-root

into  mysql.com:/opt/local/work/mysql-5.0-root


BitKeeper/deleted/.del-rpl_ignore_table.result:
  Delete: mysql-test/r/rpl_ignore_table.result
BitKeeper/deleted/.del-rpl_multi_update4.result:
  Delete: mysql-test/r/rpl_multi_update4.result
BitKeeper/deleted/.del-rpl_ignore_table-slave.opt:
  Delete: mysql-test/t/rpl_ignore_table-slave.opt
BitKeeper/deleted/.del-rpl_ignore_table.test:
  Delete: mysql-test/t/rpl_ignore_table.test
BitKeeper/deleted/.del-rpl_multi_update4-slave.opt:
  Delete: mysql-test/t/rpl_multi_update4-slave.opt
BitKeeper/deleted/.del-disabled.def:
  Auto merged
BitKeeper/deleted/.del-rpl_multi_update4.test:
  Delete: mysql-test/t/rpl_multi_update4.test
heap/hp_create.c:
  Auto merged
mysql-test/r/date_formats.result:
  Auto merged
mysql-test/r/myisam.result:
  Auto merged
mysql-test/r/update.result:
  Auto merged
mysql-test/t/date_formats.test:
  Auto merged
mysql-test/t/heap.test:
  Auto merged
mysql-test/t/kill.test:
  Auto merged
mysql-test/t/update.test:
  Auto merged
ndb/include/mgmapi/mgmapi_config_parameters.h:
  Auto merged
ndb/test/ndbapi/testBlobs.cpp:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_select.h:
  Auto merged
configure.in:
  Manual merge.
libmysql/libmysql.c:
  Manual merge.
mysql-test/r/heap.result:
  Manual merge.
mysql-test/r/heap_hash.result:
  Manual merge.
mysql-test/r/kill.result:
  Manual merge.
sql/ha_heap.cc:
  Manual merge.
sql/ha_heap.h:
  Manual merge.
sql/item_timefunc.cc:
  Manual merge.
sql/sql_class.cc:
  Manual merge.
sql/sql_parse.cc:
  Manual merge.
sql/sql_update.cc:
  Manual merge.
tests/mysql_client_test.c:
  Manual merge.

22 files changed, 290 insertions, 29 deletions

diff --git a/configure.in b/configure.in
index c171badb8e7..2ba832d4e2b 100644
--- a/configure.in
+++ b/configure.in
@@ -365,7 +365,7 @@ MYSQL_PROG_AR
 
 # libmysqlclient versioning when linked with GNU ld.
 if $LD --version 2>/dev/null|grep -q GNU; then
-  LD_VERSION_SCRIPT="-Wl,--version-script=\$(top_srcdir)/libmysql/libmysql.ver"
+  LD_VERSION_SCRIPT="-Wl,--version-script=\$(top_builddir)/libmysql/libmysql.ver"
   AC_CONFIG_FILES(libmysql/libmysql.ver)
 fi
 AC_SUBST(LD_VERSION_SCRIPT)
diff --git a/heap/hp_create.c b/heap/hp_create.c
index 47dcb00278a..9ffa4e33108 100644
--- a/heap/hp_create.c
+++ b/heap/hp_create.c
@@ -135,6 +135,7 @@ int heap_create(const char *name, uint keys, HP_KEYDEF *keydef,
       DBUG_RETURN(1);
     }
     share->keydef= (HP_KEYDEF*) (share + 1);
+    share->key_stat_version= 1;
     keyseg= (HA_KEYSEG*) (share->keydef + keys);
     init_block(&share->block, reclength + 1, min_records, max_records);
 	/* Fix keys */
diff --git a/include/heap.h b/include/heap.h
index badec9ce2ef..cfbb6113f86 100644
--- a/include/heap.h
+++ b/include/heap.h
@@ -136,6 +136,7 @@ typedef struct st_heap_share
   HP_KEYDEF  *keydef;
   ulong min_records,max_records;	/* Params to open */
   ulong data_length,index_length,max_table_size;
+  uint key_stat_version;                /* version to indicate insert/delete */
   uint records;				/* records */
   uint blength;				/* records rounded up to 2^n */
   uint deleted;				/* Deleted records in database */
diff --git a/libmysql/libmysql.c b/libmysql/libmysql.c
index be1a3a1fe5f..9825f1ecdfa 100644
--- a/libmysql/libmysql.c
+++ b/libmysql/libmysql.c
@@ -5036,6 +5036,12 @@ my_bool STDCALL mysql_stmt_reset(MYSQL_STMT *stmt)
 {
   DBUG_ENTER("mysql_stmt_reset");
   DBUG_ASSERT(stmt != 0);
+  if (!stmt->mysql)
+  {
+    /* mysql can be reset in mysql_close called from mysql_reconnect */
+    set_stmt_error(stmt, CR_SERVER_LOST, unknown_sqlstate);
+    DBUG_RETURN(1);
+  }
   /* Reset the client and server sides of the prepared statement */
   DBUG_RETURN(reset_stmt_handle(stmt, RESET_SERVER_SIDE | RESET_LONG_DATA));
 }
diff --git a/mysql-test/r/date_formats.result b/mysql-test/r/date_formats.result
index f8189266e50..39e3aa0ca8e 100644
--- a/mysql-test/r/date_formats.result
+++ b/mysql-test/r/date_formats.result
@@ -503,3 +503,12 @@ d1	d2
 02	February
 01	January
 drop table t1;
+select str_to_date( 1, NULL );
+str_to_date( 1, NULL )
+NULL
+select str_to_date( NULL, 1 );
+str_to_date( NULL, 1 )
+NULL
+select str_to_date( 1, IF(1=1,NULL,NULL) );
+str_to_date( 1, IF(1=1,NULL,NULL) )
+NULL
diff --git a/mysql-test/r/kill.result b/mysql-test/r/kill.result
index 2413834be4f..d52d2eb9ebb 100644
--- a/mysql-test/r/kill.result
+++ b/mysql-test/r/kill.result
@@ -1,4 +1,4 @@
-drop table if exists t1;
+drop table if exists t1, t2, t3;
 create table t1 (kill_id int);
 insert into t1 values(connection_id());
 select ((@id := kill_id) - kill_id) from t1;
@@ -27,3 +27,15 @@ select 1;
 select RELEASE_LOCK("a");
 RELEASE_LOCK("a")
 1
+create table t1 (id int primary key);
+create table t2 (id int unsigned not null);
+insert into t2 select id from t1;
+create table t3 (kill_id int);
+insert into t3 values(connection_id());
+ select id from t1 where id in (select distinct id from t2);
+select ((@id := kill_id) - kill_id) from t3;
+((@id := kill_id) - kill_id)
+0
+kill @id;
+ERROR 08S01: Server shutdown in progress
+drop table t1, t2, t3;
diff --git a/mysql-test/r/myisam.result b/mysql-test/r/myisam.result
index e000cfd9c11..f60996ba31f 100644
--- a/mysql-test/r/myisam.result
+++ b/mysql-test/r/myisam.result
@@ -567,7 +567,7 @@ Warnings:
 Note	1031	Table storage engine for 't1' doesn't have this option
 show keys from t1;
 Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment
-t1	1	a	1	a	NULL	1000	NULL	NULL	YES	HASH	
+t1	1	a	1	a	NULL	500	NULL	NULL	YES	HASH	
 drop table t1,t2;
 create table t1 ( a tinytext, b char(1), index idx (a(1),b) );
 insert into t1 values (null,''), (null,'');
diff --git a/mysql-test/r/update.result b/mysql-test/r/update.result
index abeade5df0c..4b7dbb3dbe9 100644
--- a/mysql-test/r/update.result
+++ b/mysql-test/r/update.result
@@ -358,3 +358,22 @@ update t2,t1 set f1=3,f2=3 where f1=f2 and f1=1;
 affected rows: 3
 info: Rows matched: 3  Changed: 3  Warnings: 0
 drop table t1,t2;
+create table t1 (a int);
+insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
+create table t2 (a int, filler1 char(200), filler2 char(200), key(a));
+insert into t2 select A.a + 10*B.a, 'filler','filler' from t1 A, t1 B;
+flush status;
+update t2 set a=3 where a=2;
+show status like 'handler_read%';
+Variable_name	Value
+Handler_read_first	0
+Handler_read_key	1
+Handler_read_next	1
+Handler_read_prev	0
+Handler_read_rnd	1
+Handler_read_rnd_next	0
+drop table t1, t2;
+create table t1(f1 int, `*f2` int);
+insert into t1 values (1,1);
+update t1 set `*f2`=1;
+drop table t1;
diff --git a/mysql-test/t/date_formats.test b/mysql-test/t/date_formats.test
index c007c2f5205..b4c6cf0d72a 100644
--- a/mysql-test/t/date_formats.test
+++ b/mysql-test/t/date_formats.test
@@ -269,4 +269,11 @@ insert into t1 (f1) values ("2005-01-01");
 insert into t1 (f1) values ("2005-02-01");
 select date_format(f1, "%m") as d1, date_format(f1, "%M") as d2 from t1 order by date_format(f1, "%M");
 drop table t1;
+
+#
+# Bug #15828
+#
+select str_to_date( 1, NULL );
+select str_to_date( NULL, 1 );
+select str_to_date( 1, IF(1=1,NULL,NULL) );
 # End of 4.1 tests
diff --git a/mysql-test/t/heap.test b/mysql-test/t/heap.test
index fcaa4c41ece..6a8abdeea26 100644
--- a/mysql-test/t/heap.test
+++ b/mysql-test/t/heap.test
@@ -436,6 +436,17 @@ insert into t1 values ("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcd
 insert into t1 values ("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz");
 drop table t1;
 
+#
+# Bug 12796: Record doesn't show when selecting through index
+#
+CREATE TABLE t1 (a int, key(a)) engine=heap;
+insert delayed into t1 values (0);
+delete from t1;
+select * from t1;
+insert delayed into t1 values (0), (1);
+select * from t1 where a = 0;
+drop table t1;
+
 # End of 4.1 tests
 
 #
diff --git a/mysql-test/t/kill.test b/mysql-test/t/kill.test
index c50c35825fc..7c2482284e2 100644
--- a/mysql-test/t/kill.test
+++ b/mysql-test/t/kill.test
@@ -12,7 +12,7 @@ connect (con2, localhost, root,,);
 #remember id of con1
 connection con1;
 --disable_warnings
-drop table if exists t1;
+drop table if exists t1, t2, t3;
 --enable_warnings
 
 --disable_reconnect
@@ -47,6 +47,53 @@ connection con2;
 select 4;
 drop table t1;
 
+disconnect con2;
+connection default;
+#
+# BUG#14851: killing long running subquery processed via a temporary table.
+#
+create table t1 (id int primary key);
+create table t2 (id int unsigned not null);
+
+connect (conn1, localhost, root,,);
+connection conn1;
+
+-- disable_result_log
+-- disable_query_log
+let $1 = 4096;
+while ($1)
+{
+  eval insert into t1 values ($1);
+  dec $1;
+}
+-- enable_query_log
+-- enable_result_log
+
+insert into t2 select id from t1;
+
+create table t3 (kill_id int);
+insert into t3 values(connection_id());
+
+-- disable_result_log
+send select id from t1 where id in (select distinct id from t2);
+-- enable_result_log
+
+connect (conn2, localhost, root,,);
+connection conn2;
+select ((@id := kill_id) - kill_id) from t3;
+-- sleep 1
+kill @id;
+
+connection conn1;
+-- error 1053
+reap;
+
+disconnect conn1;
+disconnect conn2;
+connection default;
+
+drop table t1, t2, t3;
+
 # End of 4.1 tests
 
 #
diff --git a/mysql-test/t/update.test b/mysql-test/t/update.test
index d0496b48c7a..5a49de248b1 100644
--- a/mysql-test/t/update.test
+++ b/mysql-test/t/update.test
@@ -287,4 +287,23 @@ update t1 set f1=1 where f1=3;
 update t2,t1 set f1=3,f2=3 where f1=f2 and f1=1;
 --disable_info
 drop table t1,t2;
+
+
+# BUG#15935
+create table t1 (a int);
+insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
+create table t2 (a int, filler1 char(200), filler2 char(200), key(a));
+insert into t2 select A.a + 10*B.a, 'filler','filler' from t1 A, t1 B;
+flush status;
+update t2 set a=3 where a=2;
+show status like 'handler_read%';
+drop table t1, t2;
+
+#
+# Bug #16510 Updating field named like '*name' caused server crash
+#
+create table t1(f1 int, `*f2` int);
+insert into t1 values (1,1);
+update t1 set `*f2`=1;
+drop table t1;
 # End of 4.1 tests
diff --git a/ndb/include/mgmapi/mgmapi_config_parameters.h b/ndb/include/mgmapi/mgmapi_config_parameters.h
index 41516b1c3e4..7c24c5d698d 100644
--- a/ndb/include/mgmapi/mgmapi_config_parameters.h
+++ b/ndb/include/mgmapi/mgmapi_config_parameters.h
@@ -85,6 +85,11 @@
 #define CFG_DB_BACKUP_DATADIR         158
 
 #define CFG_DB_MAX_OPEN_FILES         159
+#define CFG_DB_DISK_PAGE_BUFFER_MEMORY 160 /* used from 5.1 */
+#define CFG_DB_STRING_MEMORY          161 /* used from 5.1 */
+#define CFG_DB_INITIAL_OPEN_FILES     162 /* used from 5.1 */
+
+#define CFG_DB_DATA_MEM_2             199 /* used in special build in 5.1 */
 
 #define CFG_NODE_ARBIT_RANK           200
 #define CFG_NODE_ARBIT_DELAY          201
diff --git a/ndb/test/ndbapi/testBlobs.cpp b/ndb/test/ndbapi/testBlobs.cpp
index a88d7d21820..506ff188ff6 100644
--- a/ndb/test/ndbapi/testBlobs.cpp
+++ b/ndb/test/ndbapi/testBlobs.cpp
@@ -1483,13 +1483,16 @@ testperf()
   // insert char (one trans)
   {
     DBG("--- insert char ---");
+    char b[20];
     t1.on();
     CHK((g_con = g_ndb->startTransaction()) != 0);
     for (Uint32 k = 0; k < g_opt.m_rowsperf; k++) {
       CHK((g_opr = g_con->getNdbOperation(tab.getName())) != 0);
       CHK(g_opr->insertTuple() == 0);
       CHK(g_opr->equal(cA, (char*)&k) == 0);
-      CHK(g_opr->setValue(cB, "b") == 0);
+      memset(b, 0x20, sizeof(b));
+      b[0] = 'b';
+      CHK(g_opr->setValue(cB, b) == 0);
       CHK(g_con->execute(NoCommit) == 0);
     }
     t1.off(g_opt.m_rowsperf);
@@ -1526,12 +1529,15 @@ testperf()
   {
     DBG("--- insert for read test ---");
     unsigned n = 0;
+    char b[20];
     CHK((g_con = g_ndb->startTransaction()) != 0);
     for (Uint32 k = 0; k < g_opt.m_rowsperf; k++) {
       CHK((g_opr = g_con->getNdbOperation(tab.getName())) != 0);
       CHK(g_opr->insertTuple() == 0);
       CHK(g_opr->equal(cA, (char*)&k) == 0);
-      CHK(g_opr->setValue(cB, "b") == 0);
+      memset(b, 0x20, sizeof(b));
+      b[0] = 'b';
+      CHK(g_opr->setValue(cB, b) == 0);
       CHK((g_bh1 = g_opr->getBlobHandle(cC)) != 0);
       CHK((g_bh1->setValue("c", 1) == 0));
       if (++n == g_opt.m_batch) {
@@ -1565,7 +1571,7 @@ testperf()
       a = (Uint32)-1;
       b[0] = 0;
       CHK(g_con->execute(NoCommit) == 0);
-      CHK(a == k && strcmp(b, "b") == 0);
+      CHK(a == k && b[0] == 'b');
     }
     CHK(g_con->execute(Commit) == 0);
     t1.off(g_opt.m_rowsperf);
@@ -1591,7 +1597,7 @@ testperf()
       CHK(g_con->execute(NoCommit) == 0);
       Uint32 m = 20;
       CHK(g_bh1->readData(c, m) == 0);
-      CHK(a == k && m == 1 && strcmp(c, "c") == 0);
+      CHK(a == k && m == 1 && c[0] == 'c');
     }
     CHK(g_con->execute(Commit) == 0);
     t2.off(g_opt.m_rowsperf);
@@ -1623,7 +1629,7 @@ testperf()
       CHK((ret = g_ops->nextResult(true)) == 0 || ret == 1);
       if (ret == 1)
         break;
-      CHK(a < g_opt.m_rowsperf && strcmp(b, "b") == 0);
+      CHK(a < g_opt.m_rowsperf && b[0] == 'b');
       n++;
     }
     CHK(n == g_opt.m_rowsperf);
@@ -1654,7 +1660,7 @@ testperf()
         break;
       Uint32 m = 20;
       CHK(g_bh1->readData(c, m) == 0);
-      CHK(a < g_opt.m_rowsperf && m == 1 && strcmp(c, "c") == 0);
+      CHK(a < g_opt.m_rowsperf && m == 1 && c[0] == 'c');
       n++;
     }
     CHK(n == g_opt.m_rowsperf);
diff --git a/sql/ha_heap.cc b/sql/ha_heap.cc
index 98cc96db707..2a989a71edc 100644
--- a/sql/ha_heap.cc
+++ b/sql/ha_heap.cc
@@ -53,7 +53,7 @@ handlerton heap_hton= {
 
 ha_heap::ha_heap(TABLE *table_arg)
   :handler(&heap_hton, table_arg), file(0), records_changed(0),
-  key_stats_ok(0)
+  key_stats_version(0)
 {}
 
 
@@ -104,7 +104,7 @@ int ha_heap::open(const char *name, int mode, uint test_if_locked)
       ha_heap::info(), which is always called before key statistics are
       used.
     */
-    key_stats_ok= FALSE;
+    key_stat_version= file->s->key_stat_version-1;
   }
   return (file ? 0 : 1);
 }
@@ -151,14 +151,21 @@ void ha_heap::update_key_stats()
       continue;
     if (key->algorithm != HA_KEY_ALG_BTREE)
     {
-      ha_rows hash_buckets= file->s->keydef[i].hash_buckets;
-      key->rec_per_key[key->key_parts-1]= 
-        hash_buckets ? file->s->records/hash_buckets : 0;
+      if (key->flags & HA_NOSAME)
+        key->rec_per_key[key->key_parts-1]= 1;
+      else
+      {
+        ha_rows hash_buckets= file->s->keydef[i].hash_buckets;
+        uint no_records= hash_buckets ? file->s->records/hash_buckets : 2;
+        if (no_records < 2)
+          no_records= 2;
+        key->rec_per_key[key->key_parts-1]= no_records;
+      }
     }
   }
   records_changed= 0;
   /* At the end of update_key_stats() we can proudly claim they are OK. */
-  key_stats_ok= TRUE;
+  key_stat_version= file->s->key_stat_version;
 }
 
 
@@ -173,7 +180,13 @@ int ha_heap::write_row(byte * buf)
   res= heap_write(file,buf);
   if (!res && (++records_changed*HEAP_STATS_UPDATE_THRESHOLD > 
                file->s->records))
-    key_stats_ok= FALSE;
+  {
+    /*
+       We can perform this safely since only one writer at the time is
+       allowed on the table.
+    */
+    file->s->key_stat_version++;
+  }
   return res;
 }
 
@@ -186,7 +199,13 @@ int ha_heap::update_row(const byte * old_data, byte * new_data)
   res= heap_update(file,old_data,new_data);
   if (!res && ++records_changed*HEAP_STATS_UPDATE_THRESHOLD > 
               file->s->records)
-    key_stats_ok= FALSE;
+  {
+    /*
+       We can perform this safely since only one writer at the time is
+       allowed on the table.
+    */
+    file->s->key_stat_version++;
+  }
   return res;
 }
 
@@ -197,7 +216,13 @@ int ha_heap::delete_row(const byte * buf)
   res= heap_delete(file,buf);
   if (!res && table->s->tmp_table == NO_TMP_TABLE && 
       ++records_changed*HEAP_STATS_UPDATE_THRESHOLD > file->s->records)
-    key_stats_ok= FALSE;
+  {
+    /*
+       We can perform this safely since only one writer at the time is
+       allowed on the table.
+    */
+    file->s->key_stat_version++;
+  }
   return res;
 }
 
@@ -324,7 +349,7 @@ void ha_heap::info(uint flag)
     have to update the key statistics. Hoping that a table lock is now
     in place.
   */
-  if (! key_stats_ok)
+  if (key_stat_version != file->s->key_stat_version)
     update_key_stats();
 }
 
@@ -337,7 +362,13 @@ int ha_heap::delete_all_rows()
 {
   heap_clear(file);
   if (table->s->tmp_table == NO_TMP_TABLE)
-    key_stats_ok= FALSE;
+  {
+    /*
+       We can perform this safely since only one writer at the time is
+       allowed on the table.
+    */
+    file->s->key_stat_version++;
+  }
   return 0;
 }
 
@@ -497,6 +528,9 @@ ha_rows ha_heap::records_in_range(uint inx, key_range *min_key,
       max_key->flag != HA_READ_AFTER_KEY)
     return HA_POS_ERROR;			// Can only use exact keys
 
+  if (records <= 1)
+    return records;
+
   /* Assert that info() did run. We need current statistics here. */
   DBUG_ASSERT(key_stats_ok);
   return key->rec_per_key[key->key_parts-1];
diff --git a/sql/ha_heap.h b/sql/ha_heap.h
index 7c4227e952c..e2816abf0b6 100644
--- a/sql/ha_heap.h
+++ b/sql/ha_heap.h
@@ -29,7 +29,7 @@ class ha_heap: public handler
   key_map btree_keys;
   /* number of records changed since last statistics update */
   uint    records_changed;
-  bool    key_stats_ok;
+  uint    key_stat_version;
 public:
   ha_heap(TABLE *table);
   ~ha_heap() {}
diff --git a/sql/item_timefunc.cc b/sql/item_timefunc.cc
index 61449d3c671..17f25b49bcc 100644
--- a/sql/item_timefunc.cc
+++ b/sql/item_timefunc.cc
@@ -3023,9 +3023,9 @@ void Item_func_str_to_date::fix_length_and_dec()
   cached_field_type= MYSQL_TYPE_STRING;
   max_length= MAX_DATETIME_FULL_WIDTH*MY_CHARSET_BIN_MB_MAXLEN;
   cached_timestamp_type= MYSQL_TIMESTAMP_NONE;
-  if ((const_item= args[1]->const_item()))
+  format= args[1]->val_str(&format_str);
+  if (!args[1]->null_value && (const_item= args[1]->const_item()))
   {
-    format= args[1]->val_str(&format_str);
     cached_format_type= get_date_time_result_type(format->ptr(),
                                                   format->length());
     switch (cached_format_type) {
diff --git a/sql/sql_class.cc b/sql/sql_class.cc
index ca86c077a3a..b3709235d8b 100644
--- a/sql/sql_class.cc
+++ b/sql/sql_class.cc
@@ -1816,11 +1816,14 @@ bool select_dumpvar::send_eof()
 
 void TMP_TABLE_PARAM::init()
 {
+  DBUG_ENTER("TMP_TABLE_PARAM::init");
+  DBUG_PRINT("enter", ("this: 0x%lx", (ulong)this));
   field_count= sum_func_count= func_count= hidden_field_count= 0;
   group_parts= group_length= group_null_parts= 0;
   quick_group= 1;
   table_charset= 0;
   precomputed_group_by= 0;
+  DBUG_VOID_RETURN;
 }
 
 
diff --git a/sql/sql_select.cc b/sql/sql_select.cc
index 63d46934555..732956b63a6 100644
--- a/sql/sql_select.cc
+++ b/sql/sql_select.cc
@@ -6016,6 +6016,20 @@ void JOIN::cleanup(bool full)
       problems in free_elements() as some of the elements are then deleted.
     */
     tmp_table_param.copy_funcs.empty();
+    /*
+      If we have tmp_join and 'this' JOIN is not tmp_join and
+      tmp_table_param.copy_field's  of them are equal then we have to remove
+      pointer to  tmp_table_param.copy_field from tmp_join, because it qill
+      be removed in tmp_table_param.cleanup().
+    */
+    if (tmp_join &&
+        tmp_join != this &&
+        tmp_join->tmp_table_param.copy_field ==
+        tmp_table_param.copy_field)
+    {
+      tmp_join->tmp_table_param.copy_field=
+        tmp_join->tmp_table_param.save_copy_field= 0;
+    }
     tmp_table_param.cleanup();
   }
   DBUG_VOID_RETURN;
diff --git a/sql/sql_select.h b/sql/sql_select.h
index 4aa238641e5..9046398faaf 100644
--- a/sql/sql_select.h
+++ b/sql/sql_select.h
@@ -285,7 +285,14 @@ class JOIN :public Sql_alloc
   {
     init(thd_arg, fields_arg, select_options_arg, result_arg);
   }
-  
+
+  JOIN(JOIN &join)
+    :fields_list(join.fields_list)
+  {
+    init(join.thd, join.fields_list, join.select_options,
+         join.result);
+  }
+
   void init(THD *thd_arg, List<Item> &fields_arg, ulonglong select_options_arg,
        select_result *result_arg)
   {
@@ -332,7 +339,7 @@ class JOIN :public Sql_alloc
     all_fields= fields_arg;
     fields_list= fields_arg;
     bzero((char*) &keyuse,sizeof(keyuse));
-    tmp_table_param.copy_field=0;
+    tmp_table_param.init();
     tmp_table_param.end_write_records= HA_POS_ERROR;
     rollup.state= ROLLUP::STATE_NONE;
   }
diff --git a/sql/sql_update.cc b/sql/sql_update.cc
index 2ff8a4bc244..d319167b61d 100644
--- a/sql/sql_update.cc
+++ b/sql/sql_update.cc
@@ -308,7 +308,6 @@ int mysql_update(THD *thd,
       SORT_FIELD  *sortorder;
       ha_rows examined_rows;
 
-      used_index= MAX_KEY;                   // For call to init_read_record()
       table->sort.io_cache = (IO_CACHE *) my_malloc(sizeof(IO_CACHE),
 						    MYF(MY_FAE | MY_ZEROFILL));
       if (!(sortorder=make_unireg_sortorder(order, &length)) ||
@@ -339,10 +338,21 @@ int mysql_update(THD *thd,
       if (open_cached_file(&tempfile, mysql_tmpdir,TEMP_PREFIX,
 			   DISK_BUFFER_SIZE, MYF(MY_WME)))
 	goto err;
-      
+
       /* If quick select is used, initialize it before retrieving rows. */
       if (select && select->quick && select->quick->reset())
         goto err;
+
+      /*
+        When we get here, we have one of the following options:
+        A. used_index == MAX_KEY
+           This means we should use full table scan, and start it with
+           init_read_record call
+        B. used_index != MAX_KEY
+           B.1 quick select is used, start the scan with init_read_record
+           B.2 quick select is not used, this is full index scan (with LIMIT)
+               Full index scan must be started with init_read_record_idx
+      */
       if (used_index == MAX_KEY || (select && select->quick))
         init_read_record(&info,thd,table,select,0,1);
       else
diff --git a/tests/mysql_client_test.c b/tests/mysql_client_test.c
index e68e9c61000..c5d31f96867 100644
--- a/tests/mysql_client_test.c
+++ b/tests/mysql_client_test.c
@@ -14714,6 +14714,56 @@ static void test_bug16144()
   mysql_stmt_close(stmt);
 }
 
+
+static void test_bug12744()
+{
+  MYSQL_STMT *prep_stmt = NULL;
+  int rc;
+  myheader("test_bug12744");
+
+  prep_stmt= mysql_stmt_init(mysql);
+  rc= mysql_stmt_prepare(prep_stmt, "SELECT 1", 8);
+  DIE_UNLESS(rc==0);
+
+  rc= mysql_kill(mysql, mysql_thread_id(mysql));
+  DIE_UNLESS(rc==0);
+
+  if (rc= mysql_stmt_execute(prep_stmt))
+  {
+    if (rc= mysql_stmt_reset(prep_stmt))
+      printf("OK!\n");
+    else
+    {
+      printf("Error!");
+      DIE_UNLESS(1==0);
+    }
+  }
+  else
+  {
+    fprintf(stderr, "expected error but no error occured\n");
+    DIE_UNLESS(1==0);
+  }
+  rc= mysql_stmt_close(prep_stmt);
+}
+
+/* Bug #16144: mysql_stmt_attr_get type error */
+
+static void test_bug16144()
+{
+  const my_bool flag_orig= (my_bool) 0xde;
+  my_bool flag= flag_orig;
+  MYSQL_STMT *stmt;
+  myheader("test_bug16144");
+
+  /* Check that attr_get returns correct data on little and big endian CPUs */
+  stmt= mysql_stmt_init(mysql);
+  mysql_stmt_attr_set(stmt, STMT_ATTR_UPDATE_MAX_LENGTH, (const void*) &flag);
+  mysql_stmt_attr_get(stmt, STMT_ATTR_UPDATE_MAX_LENGTH, (void*) &flag);
+  DIE_UNLESS(flag == flag_orig);
+
+  mysql_stmt_close(stmt);
+}
+
 /*
   Bug #15613: "libmysqlclient API function mysql_stmt_prepare returns wrong
   field length"
@@ -15039,7 +15089,7 @@ static struct my_tests_st my_tests[]= {
   { "test_bug14845", test_bug14845 },
   { "test_bug15510", test_bug15510 },
   { "test_opt_reconnect", test_opt_reconnect },
-
+  { "test_bug12744", test_bug12744 },
   { "test_bug16144", test_bug16144 },
   { "test_bug15613", test_bug15613 },
   { 0, 0 }