diff --git a/include/my_global.h b/include/my_global.h
index 749a326f86f..3b66b3cbc16 100644
--- a/include/my_global.h
+++ b/include/my_global.h
@@ -153,6 +153,13 @@ C_MODE_END
 #undef HAVE_INITGROUPS
 #endif
 
+/* gcc/egcs issues */
+
+#if defined(__GNUC) && defined(__EXCEPTIONS)
+#error "Please add -fno-exceptions to CXXFLAGS and reconfigure/recompile"
+#endif
+
+
 /* Fix a bug in gcc 2.8.0 on IRIX 6.2 */
 #if SIZEOF_LONG == 4 && defined(__LONG_MAX__)
 #undef __LONG_MAX__             /* Is a longlong value in gcc 2.8.0 ??? */
diff --git a/include/my_pthread.h b/include/my_pthread.h
index f75ca8f601a..e0394bc978a 100644
--- a/include/my_pthread.h
+++ b/include/my_pthread.h
@@ -581,9 +581,13 @@ extern int pthread_dummy(int);
 
 #define THREAD_NAME_SIZE 10
 #if defined(__ia64__)
-#define DEFAULT_THREAD_STACK	(128*1024)
+/*
+  MySQL can survive with 32K, but some glibc libraries require > 128K stack
+  To resolve hostnames
+*/
+#define DEFAULT_THREAD_STACK	(192*1024L)
 #else
-#define DEFAULT_THREAD_STACK	(64*1024)
+#define DEFAULT_THREAD_STACK	(192*1024L)
 #endif
 
 struct st_my_thread_var
diff --git a/innobase/btr/btr0btr.c b/innobase/btr/btr0btr.c
index a1665aefab7..51c164b7cef 100644
--- a/innobase/btr/btr0btr.c
+++ b/innobase/btr/btr0btr.c
@@ -135,7 +135,7 @@ btr_page_insert_fits(
 
 /******************************************************************
 Gets the root node of a tree and x-latches it. */
-static
+
 page_t*
 btr_root_get(
 /*=========*/
@@ -146,9 +146,6 @@ btr_root_get(
 	ulint	space;
 	ulint	root_page_no;
 	page_t*	root;
-
-	ut_ad(mtr_memo_contains(mtr, dict_tree_get_lock(tree), MTR_MEMO_X_LOCK)
-	  || mtr_memo_contains(mtr, dict_tree_get_lock(tree), MTR_MEMO_S_LOCK));
 	
 	space = dict_tree_get_space(tree);
 	root_page_no = dict_tree_get_page(tree);
@@ -334,8 +331,6 @@ btr_page_alloc(
 	page_t*		new_page;
 	ulint		new_page_no;
 
-	ut_ad(mtr_memo_contains(mtr, dict_tree_get_lock(tree),
-							MTR_MEMO_X_LOCK));
 	if (tree->type & DICT_IBUF) {
 
 		return(btr_page_alloc_for_ibuf(tree, mtr));
diff --git a/innobase/btr/btr0cur.c b/innobase/btr/btr0cur.c
index 24f0447d55d..df24689a422 100644
--- a/innobase/btr/btr0cur.c
+++ b/innobase/btr/btr0cur.c
@@ -3180,7 +3180,7 @@ btr_store_big_rec_extern_fields(
 
 	ut_ad(mtr_memo_contains(local_mtr, dict_tree_get_lock(index->tree),
 							MTR_MEMO_X_LOCK));
-	ut_ad(mtr_memo_contains(local_mtr, buf_block_align(data),
+	ut_ad(mtr_memo_contains(local_mtr, buf_block_align(rec),
 							MTR_MEMO_PAGE_X_FIX));	
 	ut_a(index->type & DICT_CLUSTERED);
 							
@@ -3315,7 +3315,13 @@ void
 btr_free_externally_stored_field(
 /*=============================*/
 	dict_index_t*	index,		/* in: index of the data, the index
-					tree MUST be X-latched */
+					tree MUST be X-latched; if the tree
+					height is 1, then also the root page
+					must be X-latched! (this is relevant
+					in the case this function is called
+					from purge where 'data' is located on
+					an undo log page, not an index
+					page) */
 	byte*		data,		/* in: internally stored data
 					+ reference to the externally
 					stored part */
diff --git a/innobase/include/btr0btr.h b/innobase/include/btr0btr.h
index 3cd44ab5175..8606fcd2a5c 100644
--- a/innobase/include/btr0btr.h
+++ b/innobase/include/btr0btr.h
@@ -55,6 +55,15 @@ UNIQUE definition on secondary indexes when we decide if we can use the
 insert buffer to speed up inserts */
 #define BTR_IGNORE_SEC_UNIQUE	2048	
 
+/******************************************************************
+Gets the root node of a tree and x-latches it. */
+
+page_t*
+btr_root_get(
+/*=========*/
+				/* out: root page, x-latched */
+	dict_tree_t*	tree,	/* in: index tree */
+	mtr_t*		mtr);	/* in: mtr */
 /******************************************************************
 Gets a buffer page and declares its latching order level. */
 UNIV_INLINE
diff --git a/innobase/include/btr0cur.h b/innobase/include/btr0cur.h
index 7039ceba245..1d17c0e952d 100644
--- a/innobase/include/btr0cur.h
+++ b/innobase/include/btr0cur.h
@@ -507,7 +507,13 @@ void
 btr_free_externally_stored_field(
 /*=============================*/
 	dict_index_t*	index,		/* in: index of the data, the index
-					tree MUST be X-latched */
+					tree MUST be X-latched; if the tree
+					height is 1, then also the root page
+					must be X-latched! (this is relevant
+					in the case this function is called
+					from purge where 'data' is located on
+					an undo log page, not an index
+					page) */
 	byte*		data,		/* in: internally stored data
 					+ reference to the externally
 					stored part */
diff --git a/innobase/row/row0purge.c b/innobase/row/row0purge.c
index b64003f22d4..104d71eda2d 100644
--- a/innobase/row/row0purge.c
+++ b/innobase/row/row0purge.c
@@ -429,7 +429,18 @@ skip_secondaries:
 			index = dict_table_get_first_index(node->table);
 
 			mtr_x_lock(dict_tree_get_lock(index->tree), &mtr);
+
+			/* NOTE: we must also acquire an X-latch to the
+			root page of the tree. We will need it when we
+			free pages from the tree. If the tree is of height 1,
+			the tree X-latch does NOT protect the root page,
+			because it is also a leaf page. Since we will have a
+			latch on an undo log page, we would break the
+			latching order if we would only later latch the
+			root page of such a tree! */
 			
+			btr_root_get(index->tree, &mtr);
+
 			/* We assume in purge of externally stored fields
 			that the space id of the undo log record is 0! */
 
diff --git a/innobase/srv/srv0srv.c b/innobase/srv/srv0srv.c
index 50ad90e60bd..61f5a847d51 100644
--- a/innobase/srv/srv0srv.c
+++ b/innobase/srv/srv0srv.c
@@ -1814,8 +1814,12 @@ retry:
 	/* Go to wait for the event; when a thread leaves InnoDB it will
 	release this thread */
 
+	trx->op_info = "waiting in InnoDB queue";
+
 	os_event_wait(slot->event);
 
+	trx->op_info = "";
+
 	os_fast_mutex_lock(&srv_conc_mutex);
 
 	srv_conc_n_waiting_threads--;
diff --git a/innobase/trx/trx0trx.c b/innobase/trx/trx0trx.c
index 357fb01df63..38d15866769 100644
--- a/innobase/trx/trx0trx.c
+++ b/innobase/trx/trx0trx.c
@@ -1517,10 +1517,10 @@ trx_print(
 
 #ifdef UNIV_LINUX
         buf += sprintf(buf, ", process no %lu", trx->mysql_process_no);
-#else
+#endif
         buf += sprintf(buf, ", OS thread id %lu",
 		       os_thread_pf(trx->mysql_thread_id));
-#endif
+
 	if (ut_strlen(trx->op_info) > 0) {
 		buf += sprintf(buf, " %s", trx->op_info);
 	}
diff --git a/myisam/myisamchk.c b/myisam/myisamchk.c
index 0d8d1430ce9..7fa91253850 100644
--- a/myisam/myisamchk.c
+++ b/myisam/myisamchk.c
@@ -129,7 +129,7 @@ int main(int argc, char **argv)
     char buff[22],buff2[22];
     if (!(check_param.testflag & T_SILENT) || check_param.testflag & T_INFO)
       puts("\n---------\n");
-    printf("\nTotal of all %d ISAM-files:\nData records: %9s   Deleted blocks: %9s\n",check_param.total_files,llstr(check_param.total_records,buff),
+    printf("\nTotal of all %d MyISAM-files:\nData records: %9s   Deleted blocks: %9s\n",check_param.total_files,llstr(check_param.total_records,buff),
 	   llstr(check_param.total_deleted,buff2));
   }
   free_defaults(default_argv);
@@ -328,7 +328,7 @@ static void usage(void)
   print_version();
   puts("By Monty, for your professional use");
   puts("This software comes with NO WARRANTY: see the PUBLIC for details.\n");
-  puts("Description, check and repair of ISAM tables.");
+  puts("Description, check and repair of MyISAM tables.");
   puts("Used without options all tables on the command will be checked for errors");
   printf("Usage: %s [OPTIONS] tables[.MYI]\n", my_progname);
   puts("\nGlobal options:\n\
@@ -1674,7 +1674,7 @@ void mi_check_print_error(MI_CHECK *param, const char *fmt,...)
   if (!param->warning_printed && !param->error_printed)
   {
     if (param->testflag & T_SILENT)
-      fprintf(stderr,"%s: ISAM file %s\n",my_progname,param->isam_file_name);
+      fprintf(stderr,"%s: MyISAM file %s\n",my_progname,param->isam_file_name);
     param->out_flag|= O_DATA_LOST;
   }
   param->error_printed|=1;
diff --git a/mysql-test/r/merge.result b/mysql-test/r/merge.result
index f7e692d1c7b..0bffc93c284 100644
--- a/mysql-test/r/merge.result
+++ b/mysql-test/r/merge.result
@@ -258,7 +258,7 @@ t3	CREATE TABLE `t3` (
   `othr` int(11) NOT NULL default '0'
 ) TYPE=MRG_MyISAM UNION=(t1,t2)
 drop table t3,t2,t1;
-create table t1 (a int not null) type=merge;
+create table t1 (a int not null, key(a)) type=merge;
 select * from t1;
 a
 drop table t1;
@@ -536,7 +536,7 @@ INSERT INTO t2 VALUES (1,2), (2,2);
 CREATE TABLE t (  a int(11) NOT NULL default '0',  b int(11) NOT NULL default '0',  KEY a (a,b)) TYPE=MRG_MyISAM UNION=(t1,t2);
 select max(b) from t where a = 2;
 max(b)
-NULL
+2
 select max(b) from t1 where a = 2;
 max(b)
 1
diff --git a/mysql-test/r/null.result b/mysql-test/r/null.result
index cdea66cbf58..ba2161d3147 100644
--- a/mysql-test/r/null.result
+++ b/mysql-test/r/null.result
@@ -73,3 +73,39 @@ b	ifnull(t2.b,"this is null")
 NULL	this is null
 NULL	this is null
 drop table t1;
+CREATE TABLE t1 (a varchar(16) NOT NULL, b smallint(6) NOT NULL, c datetime NOT NULL, d smallint(6) NOT NULL);
+INSERT INTO t1 SET a = "", d= "2003-01-14 03:54:55";
+UPDATE t1 SET d=1/NULL;
+UPDATE t1 SET d=NULL;
+INSERT INTO t1 (a) values (null);
+Column 'a' cannot be null
+INSERT INTO t1 (a) values (1/null);
+Column 'a' cannot be null
+INSERT INTO t1 (a) values (null),(null);
+INSERT INTO t1 (b) values (null);
+Column 'b' cannot be null
+INSERT INTO t1 (b) values (1/null);
+Column 'b' cannot be null
+INSERT INTO t1 (b) values (null),(null);
+INSERT INTO t1 (c) values (null);
+Column 'c' cannot be null
+INSERT INTO t1 (c) values (1/null);
+Column 'c' cannot be null
+INSERT INTO t1 (c) values (null),(null);
+INSERT INTO t1 (d) values (null);
+Column 'd' cannot be null
+INSERT INTO t1 (d) values (1/null);
+Column 'd' cannot be null
+INSERT INTO t1 (d) values (null),(null);
+select * from t1;
+a	b	c	d
+	0	0000-00-00 00:00:00	0
+	0	0000-00-00 00:00:00	0
+	0	0000-00-00 00:00:00	0
+	0	0000-00-00 00:00:00	0
+	0	0000-00-00 00:00:00	0
+	0	0000-00-00 00:00:00	0
+	0	0000-00-00 00:00:00	0
+	0	0000-00-00 00:00:00	0
+	0	0000-00-00 00:00:00	0
+drop table t1;
diff --git a/mysql-test/r/rpl_loaddata.result b/mysql-test/r/rpl_loaddata.result
new file mode 100644
index 00000000000..27f3d185f63
--- /dev/null
+++ b/mysql-test/r/rpl_loaddata.result
@@ -0,0 +1,13 @@
+slave stop;
+drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
+reset master;
+reset slave;
+drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
+slave start;
+create table t1(a int not null auto_increment, b int, primary key(a) );
+load data infile '../../std_data/rpl_loaddata.dat' into table t1;
+select * from t1;
+a	b
+1	10
+2	15
+drop table t1;
diff --git a/mysql-test/std_data/rpl_loaddata.dat b/mysql-test/std_data/rpl_loaddata.dat
new file mode 100644
index 00000000000..a70a059c2ab
--- /dev/null
+++ b/mysql-test/std_data/rpl_loaddata.dat
@@ -0,0 +1,2 @@
+\N	10
+\N	15
diff --git a/mysql-test/t/merge.test b/mysql-test/t/merge.test
index 2199f50fb16..e2cd8b57b7e 100644
--- a/mysql-test/t/merge.test
+++ b/mysql-test/t/merge.test
@@ -105,7 +105,7 @@ drop table t3,t2,t1;
 #
 # Test table without unions
 #
-create table t1 (a int not null) type=merge;
+create table t1 (a int not null, key(a)) type=merge;
 select * from t1;
 drop table t1;
 
diff --git a/mysql-test/t/null.test b/mysql-test/t/null.test
index ad32e0be6ff..6fea7f0d10d 100644
--- a/mysql-test/t/null.test
+++ b/mysql-test/t/null.test
@@ -48,3 +48,34 @@ insert into t1 values(10,null);
 select t2.b, ifnull(t2.b,"this is null") from t1 as t2 left join t1 as t3 on
 t2.b=t3.a order by 1;
 drop table t1;
+
+#
+# Test inserting and updating with NULL
+#
+CREATE TABLE t1 (a varchar(16) NOT NULL, b smallint(6) NOT NULL, c datetime NOT NULL, d smallint(6) NOT NULL);
+INSERT INTO t1 SET a = "", d= "2003-01-14 03:54:55";
+UPDATE t1 SET d=1/NULL;
+UPDATE t1 SET d=NULL;
+--error 1048
+INSERT INTO t1 (a) values (null);
+--error 1048
+INSERT INTO t1 (a) values (1/null);
+INSERT INTO t1 (a) values (null),(null);
+--error 1048
+INSERT INTO t1 (b) values (null);
+--error 1048
+INSERT INTO t1 (b) values (1/null);
+INSERT INTO t1 (b) values (null),(null);
+--error 1048
+INSERT INTO t1 (c) values (null);
+--error 1048
+INSERT INTO t1 (c) values (1/null);
+INSERT INTO t1 (c) values (null),(null);
+--error 1048
+INSERT INTO t1 (d) values (null);
+--error 1048
+INSERT INTO t1 (d) values (1/null);
+INSERT INTO t1 (d) values (null),(null);
+select * from t1;
+drop table t1;
+
diff --git a/mysql-test/t/rpl_loaddata.test b/mysql-test/t/rpl_loaddata.test
new file mode 100644
index 00000000000..d7fc2a10ca4
--- /dev/null
+++ b/mysql-test/t/rpl_loaddata.test
@@ -0,0 +1,16 @@
+# See if replication of a "LOAD DATA in an autoincrement column"
+# Honours autoincrement values
+# i.e. if the master and slave have the same sequence
+source include/master-slave.inc;
+
+create table t1(a int not null auto_increment, b int, primary key(a) );
+load data infile '../../std_data/rpl_loaddata.dat' into table t1;
+save_master_pos;
+connection slave;
+sync_with_master;
+select * from t1;                                     
+connection master;
+drop table t1;
+save_master_pos;
+connection slave;
+sync_with_master;
diff --git a/mysql-test/t/rpl_log-master.opt b/mysql-test/t/rpl_log-master.opt
new file mode 100644
index 00000000000..e0d075c3fbd
--- /dev/null
+++ b/mysql-test/t/rpl_log-master.opt
@@ -0,0 +1 @@
+--skip-external-locking
diff --git a/sql/field_conv.cc b/sql/field_conv.cc
index ffc93f3e871..42272dd616f 100644
--- a/sql/field_conv.cc
+++ b/sql/field_conv.cc
@@ -118,6 +118,15 @@ set_field_to_null(Field *field)
     field->reset();
     return 0;
   }
+  field->reset();
+  if (current_thd->count_cuted_fields)
+  {
+    current_thd->cuted_fields++;		// Increment error counter
+    return 0;
+  }
+  if (!current_thd->no_errors)
+    my_printf_error(ER_BAD_NULL_ERROR,ER(ER_BAD_NULL_ERROR),MYF(0),
+		    field->field_name);
   return 1;
 }
 
diff --git a/sql/ha_innodb.cc b/sql/ha_innodb.cc
index e7fbe1c521a..b4fe6130e9b 100644
--- a/sql/ha_innodb.cc
+++ b/sql/ha_innodb.cc
@@ -2249,19 +2249,7 @@ convert_search_mode_to_innobase(
 		case HA_READ_AFTER_KEY:		return(PAGE_CUR_G);
 		case HA_READ_BEFORE_KEY:	return(PAGE_CUR_L);
 		case HA_READ_PREFIX:		return(PAGE_CUR_GE);
-		case HA_READ_PREFIX_LAST:
-		  /*		        ut_print_timestamp(stderr);
-                        fprintf(stderr,
-			" InnoDB: Warning: Using HA_READ_PREFIX_LAST\n"); */
-		        return(PAGE_CUR_LE);
-
-		        /* InnoDB does not yet support ..PREFIX_LAST!
-		        We have to add a new search flag
-		        PAGE_CUR_LE_OR_PREFIX to InnoDB. */
-
-			/* the above PREFIX flags mean that the last
-			field in the key value may just be a prefix
-			of the complete fixed length field */
+          	case HA_READ_PREFIX_LAST:       return(PAGE_CUR_LE_OR_EXTENDS);
 		default:			assert(0);
 	}
 
@@ -2460,6 +2448,9 @@ ha_innobase::change_active_index(
   statistic_increment(ha_read_key_count, &LOCK_status);
   DBUG_ENTER("change_active_index");
 
+  ut_a(prebuilt->trx ==
+	     (trx_t*) current_thd->transaction.all.innobase_tid);
+
   active_index = keynr;
 
   if (keynr != MAX_KEY && table->keys > 0) {
@@ -2487,9 +2478,9 @@ ha_innobase::change_active_index(
 
   /* Maybe MySQL changes the active index for a handle also
      during some queries, we do not know: then it is safest to build
-     the template such that all columns will be fetched */
+     the template such that all columns will be fetched. */
 
-  build_template(prebuilt, user_thd, table, ROW_MYSQL_WHOLE_ROW);
+  build_template(prebuilt, NULL, table, ROW_MYSQL_WHOLE_ROW);
 
   DBUG_RETURN(0);
 }
@@ -2994,6 +2985,7 @@ ha_innobase::create(
 {
 	int		error;
 	dict_table_t*	innobase_table;
+	trx_t*		parent_trx;
 	trx_t*		trx;
 	int		primary_key_no;
 	uint		i;
@@ -3005,6 +2997,16 @@ ha_innobase::create(
 
 	DBUG_ASSERT(thd != NULL);
 
+	/* Get the transaction associated with the current thd, or create one
+	if not yet created */
+	
+	parent_trx = check_trx_exists(current_thd);
+
+	/* In case MySQL calls this in the middle of a SELECT query, release
+	possible adaptive hash latch to avoid deadlocks of threads */
+
+	trx_search_latch_release_if_reserved(parent_trx);	
+	
 	trx = trx_allocate_for_mysql();
 
 	if (thd->options & OPTION_NO_FOREIGN_KEY_CHECKS) {
@@ -3165,11 +3167,22 @@ ha_innobase::delete_table(
 {
 	ulint	name_len;
 	int	error;
+	trx_t*	parent_trx;
 	trx_t*	trx;
 	char	norm_name[1000];
 
   	DBUG_ENTER("ha_innobase::delete_table");
 
+	/* Get the transaction associated with the current thd, or create one
+	if not yet created */
+	
+	parent_trx = check_trx_exists(current_thd);
+
+	/* In case MySQL calls this in the middle of a SELECT query, release
+	possible adaptive hash latch to avoid deadlocks of threads */
+
+	trx_search_latch_release_if_reserved(parent_trx);	
+
 	if (lower_case_table_names) {
 		srv_lower_case_table_names = TRUE;
 	} else {
@@ -3224,11 +3237,22 @@ innobase_drop_database(
 			the database name is 'test' */
 {
 	ulint	len		= 0;
+	trx_t*	parent_trx;
 	trx_t*	trx;
 	char*	ptr;
 	int	error;
 	char	namebuf[10000];
 
+	/* Get the transaction associated with the current thd, or create one
+	if not yet created */
+	
+	parent_trx = check_trx_exists(current_thd);
+
+	/* In case MySQL calls this in the middle of a SELECT query, release
+	possible adaptive hash latch to avoid deadlocks of threads */
+
+	trx_search_latch_release_if_reserved(parent_trx);	
+
 	ptr = strend(path) - 2;
 
 	while (ptr >= path && *ptr != '\\' && *ptr != '/') {
@@ -3280,12 +3304,23 @@ ha_innobase::rename_table(
 	ulint	name_len1;
 	ulint	name_len2;
 	int	error;
+	trx_t*	parent_trx;
 	trx_t*	trx;
 	char	norm_from[1000];
 	char	norm_to[1000];
 
   	DBUG_ENTER("ha_innobase::rename_table");
 
+	/* Get the transaction associated with the current thd, or create one
+	if not yet created */
+	
+	parent_trx = check_trx_exists(current_thd);
+
+	/* In case MySQL calls this in the middle of a SELECT query, release
+	possible adaptive hash latch to avoid deadlocks of threads */
+
+	trx_search_latch_release_if_reserved(parent_trx);	
+
 	if (lower_case_table_names) {
 		srv_lower_case_table_names = TRUE;
 	} else {
@@ -3332,8 +3367,8 @@ Estimates the number of index records in a range. */
 ha_rows
 ha_innobase::records_in_range(
 /*==========================*/
-						/* out: estimated number of rows,
-						currently 32-bit int or uint */
+						/* out: estimated number of
+						rows */
 	int 			keynr,		/* in: index number */
 	const mysql_byte*	start_key,	/* in: start key value of the
 						range, may also be empty */
@@ -3364,9 +3399,18 @@ ha_innobase::records_in_range(
 
    	DBUG_ENTER("records_in_range");
 
-	/* Warning: since it is not sure that MySQL calls external_lock
-	before calling this function, the trx field in prebuilt can be
-	obsolete! */
+	/* We do not know if MySQL can call this function before calling
+	external_lock(). To be safe, update the thd of the current table
+	handle. */
+
+	update_thd(current_thd);
+
+	prebuilt->trx->op_info = (char*)"estimating records in index range";
+
+	/* In case MySQL calls this in the middle of a SELECT query, release
+	possible adaptive hash latch to avoid deadlocks of threads */
+
+	trx_search_latch_release_if_reserved(prebuilt->trx);
 
 	active_index = keynr;
 
@@ -3400,6 +3444,8 @@ ha_innobase::records_in_range(
 
     	my_free((char*) key_val_buff2, MYF(0));
 
+	prebuilt->trx->op_info = (char*)"";
+
 	DBUG_RETURN((ha_rows) n_rows);
 }
 
@@ -3420,11 +3466,21 @@ ha_innobase::estimate_number_of_rows(void)
 	ulonglong	estimate;
 	ulonglong	local_data_file_length;
 
-	/* Warning: since it is not sure that MySQL calls external_lock
-	before calling this function, the trx field in prebuilt can be
-	obsolete! */
+ 	DBUG_ENTER("estimate_number_of_rows");
 
- 	DBUG_ENTER("info");
+	/* We do not know if MySQL can call this function before calling
+	external_lock(). To be safe, update the thd of the current table
+	handle. */
+
+	update_thd(current_thd);
+
+	prebuilt->trx->op_info = (char*)
+	                         "calculating upper bound for table rows";
+
+	/* In case MySQL calls this in the middle of a SELECT query, release
+	possible adaptive hash latch to avoid deadlocks of threads */
+
+	trx_search_latch_release_if_reserved(prebuilt->trx);
 
 	index = dict_table_get_first_index_noninline(prebuilt->table);
 
@@ -3439,6 +3495,8 @@ ha_innobase::estimate_number_of_rows(void)
 
 	estimate = 2 * local_data_file_length / dict_index_calc_min_rec_len(index);
 
+	prebuilt->trx->op_info = (char*)"";
+
 	DBUG_RETURN((ha_rows) estimate);
 }
 
@@ -3489,9 +3547,18 @@ ha_innobase::info(
                 return;
         }
 
-	/* Warning: since it is not sure that MySQL calls external_lock
-	before calling this function, the trx field in prebuilt can be
-	obsolete! */
+	/* We do not know if MySQL can call this function before calling
+	external_lock(). To be safe, update the thd of the current table
+	handle. */
+
+	update_thd(current_thd);
+
+	/* In case MySQL calls this in the middle of a SELECT query, release
+	possible adaptive hash latch to avoid deadlocks of threads */
+
+	prebuilt->trx->op_info = (char*)"returning various info to MySQL";
+
+	trx_search_latch_release_if_reserved(prebuilt->trx);
 
  	ib_table = prebuilt->table;
 
@@ -3499,7 +3566,12 @@ ha_innobase::info(
  		/* In sql_show we call with this flag: update then statistics
  		so that they are up-to-date */
 
+	        prebuilt->trx->op_info = (char*)"updating table statistics";
+
  		dict_update_statistics(ib_table);
+
+		prebuilt->trx->op_info = (char*)
+		                          "returning various info to MySQL";
  	}
 
 	if (flag & HA_STATUS_VARIABLE) {
@@ -3559,12 +3631,6 @@ ha_innobase::info(
 		}
 	}
 
-	/* The trx struct in InnoDB contains a pthread mutex embedded:
-	in the debug version of MySQL that it replaced by a 'safe mutex'
-	which is of a different size. We have to use a function to access
-	trx fields. Otherwise trx->error_info will be a random
-	pointer and cause a seg fault. */
-
   	if (flag & HA_STATUS_ERRKEY) {
 		ut_a(prebuilt->trx && prebuilt->trx->magic_n == TRX_MAGIC_N);
 
@@ -3573,6 +3639,8 @@ ha_innobase::info(
 				       trx_get_error_info(prebuilt->trx));
   	}
 
+	prebuilt->trx->op_info = (char*)"";
+
   	DBUG_VOID_RETURN;
 }
 
@@ -3630,11 +3698,22 @@ ha_innobase::update_table_comment(
   	char*		str 	= my_malloc(length + 16500, MYF(0));
   	char*		pos;
 
-	/* Warning: since it is not sure that MySQL calls external_lock
-	before calling this function, the trx field in prebuilt can be
-	obsolete! */
+	/* We do not know if MySQL can call this function before calling
+	external_lock(). To be safe, update the thd of the current table
+	handle. */
+
+	update_thd(current_thd);
+
+	prebuilt->trx->op_info = (char*)"returning table comment";
+
+	/* In case MySQL calls this in the middle of a SELECT query, release
+	possible adaptive hash latch to avoid deadlocks of threads */
+
+	trx_search_latch_release_if_reserved(prebuilt->trx);
    	
 	if (!str) {
+	        prebuilt->trx->op_info = (char*)"";
+
     		return((char*)comment);
 	}
 
@@ -3658,6 +3737,8 @@ ha_innobase::update_table_comment(
 							prebuilt->table);
 	}
 
+        prebuilt->trx->op_info = (char*)"";
+
   	return(str);
 }
 
@@ -3673,20 +3754,30 @@ ha_innobase::get_foreign_key_create_info(void)
 {
 	row_prebuilt_t* prebuilt = (row_prebuilt_t*)innobase_prebuilt;
 	char*	str;
+
+	ut_a(prebuilt != NULL);
+
+	/* We do not know if MySQL can call this function before calling
+	external_lock(). To be safe, update the thd of the current table
+	handle. */
+
+	update_thd(current_thd);
+
+        prebuilt->trx->op_info = (char*)"getting info on foreign keys";
+
+	/* In case MySQL calls this in the middle of a SELECT query, release
+	possible adaptive hash latch to avoid deadlocks of threads */
+
+	trx_search_latch_release_if_reserved(prebuilt->trx);
 	
-	if (prebuilt == NULL) {
-		fprintf(stderr,
-"InnoDB: Error: cannot get create info for foreign keys\n");
-
-		return(NULL);
-	}
-
 	str = (char*)ut_malloc(10000);
 
 	str[0] = '\0';
 	
   	dict_print_info_on_foreign_keys(TRUE, str, 9000, prebuilt->table);
 
+        prebuilt->trx->op_info = (char*)"";
+
   	return(str);
 }			
 
@@ -3752,9 +3843,10 @@ ha_innobase::reset(void)
 }
 
 /**********************************************************************
-When we create a temporary table inside MySQL LOCK TABLES, MySQL will
-not call external_lock for the temporary table when it uses it. Instead,
-it will call this function. */
+Inside LOCK TABLES MySQL will not call external_lock() between SQL
+statements. It will call this function at the start of each SQL statement.
+Note also a spacial case: if a temporary table is created inside LOCK
+TABLES, MySQL has not called external_lock() at all on that table. */
 
 int
 ha_innobase::start_stmt(
@@ -3892,8 +3984,8 @@ ha_innobase::external_lock(
 
 		  	trx->mysql_n_tables_locked = 0;
 
-			/* Here we release the search latch, auto_inc_lock,
-			and InnoDB thread FIFO ticket if they were reserved. */
+			/* Here we release the search latch and InnoDB
+			thread FIFO ticket if they were reserved. */
 
 			innobase_release_stat_resources(trx);
 
@@ -4209,4 +4301,4 @@ ha_innobase::get_auto_increment()
 }
 
 #endif /* HAVE_INNOBASE_DB */
- 
+
diff --git a/sql/ha_myisammrg.cc b/sql/ha_myisammrg.cc
index b043c6fd942..a93d2e5ed43 100644
--- a/sql/ha_myisammrg.cc
+++ b/sql/ha_myisammrg.cc
@@ -231,7 +231,7 @@ void ha_myisammrg::info(uint flag)
 #endif
   if (flag & HA_STATUS_CONST)
   {
-    if (table->key_parts)
+    if (table->key_parts && info.rec_per_key)
       memcpy((char*) table->key_info[0].rec_per_key,
 	     (char*) info.rec_per_key,
 	     sizeof(table->key_info[0].rec_per_key)*table->key_parts);
diff --git a/sql/mysqld.cc b/sql/mysqld.cc
index e7190f575db..46fbee0a7ea 100644
--- a/sql/mysqld.cc
+++ b/sql/mysqld.cc
@@ -749,7 +749,7 @@ static void *kill_server(void *sig_ptr)
 #define RETURN_FROM_KILL_SERVER DBUG_RETURN(0)
 #else
 static void __cdecl kill_server(int sig_ptr)
-#define RETURN_FROM_KILL_SERVER DBUG_RETURN
+#define RETURN_FROM_KILL_SERVER DBUG_VOID_RETURN
 #endif
 {
   int sig=(int) (long) sig_ptr;			// This is passed a int
diff --git a/sql/opt_sum.cc b/sql/opt_sum.cc
index 4b6a196051e..ecfa97586e9 100644
--- a/sql/opt_sum.cc
+++ b/sql/opt_sum.cc
@@ -38,7 +38,7 @@ int opt_sum_query(TABLE_LIST *tables, List<Item> &all_fields,COND *conds)
   table_map removed_tables=0;
   Item *item;
   COND *org_conds= conds;
-  
+
   /* Add all ON conditions to WHERE condition */
   for (TABLE_LIST *tl=tables; tl ; tl= tl->next)
   {
@@ -165,10 +165,9 @@ int opt_sum_query(TABLE_LIST *tables, List<Item> &all_fields,COND *conds)
 	    error=table->file->index_last(table->record[0]) !=0;
 	  else
 	  {
-	    (void)table->file->index_read(table->record[0], key_buff,
+	    error = table->file->index_read(table->record[0], key_buff,
 					  ref.key_length,
-					  HA_READ_AFTER_KEY);
-	    error=table->file->index_prev(table->record[0]) ||
+					  HA_READ_PREFIX_LAST) ||
 	      key_cmp(table,key_buff,ref.key,ref.key_length);
 	  }
 	  if (table->key_read)
diff --git a/sql/sql_handler.cc b/sql/sql_handler.cc
index 289d2434225..66dcf37d07f 100644
--- a/sql/sql_handler.cc
+++ b/sql/sql_handler.cc
@@ -109,6 +109,8 @@ int mysql_ha_read(THD *thd, TABLE_LIST *tables,
   if (cond && cond->fix_fields(thd,tables))
     return -1;
 
+  table->file->init_table_handle_for_HANDLER(); // Only InnoDB requires it
+
   if (keyname)
   {
     if ((keyno=find_type(keyname, &table->keynames, 1+2)-1)<0)
@@ -128,8 +130,6 @@ int mysql_ha_read(THD *thd, TABLE_LIST *tables,
 
   insert_fields(thd,tables,tables->db,tables->alias,&it);
 
-  table->file->init_table_handle_for_HANDLER(); // Only InnoDB requires it
-
   select_limit+=offset_limit;
   send_fields(thd,list,1);
 
@@ -139,6 +139,8 @@ int mysql_ha_read(THD *thd, TABLE_LIST *tables,
   if (!lock)
      goto err0; // mysql_lock_tables() printed error message already
 
+  table->file->init_table_handle_for_HANDLER(); // Only InnoDB requires it
+
   for (num_rows=0; num_rows < select_limit; )
   {
     switch(mode) {
diff --git a/sql/sql_load.cc b/sql/sql_load.cc
index 908ff8c6361..c1c6267879e 100644
--- a/sql/sql_load.cc
+++ b/sql/sql_load.cc
@@ -357,8 +357,10 @@ read_fixed_length(THD *thd,COPY_INFO &info,TABLE *table,List<Item> &fields,
 {
   List_iterator_fast<Item> it(fields);
   Item_field *sql_field;
+  ulonglong id;
   DBUG_ENTER("read_fixed_length");
 
+  id=0;
   /* No fields can be null in this format. mark all fields as not null */
   while ((sql_field= (Item_field*) it++))
       sql_field->field->set_notnull();
@@ -401,6 +403,14 @@ read_fixed_length(THD *thd,COPY_INFO &info,TABLE *table,List<Item> &fields,
       thd->cuted_fields++;			/* To long row */
     if (write_record(table,&info))
       DBUG_RETURN(1);
+    /*
+      If auto_increment values are used, save the first one
+       for LAST_INSERT_ID() and for the binary/update log.
+       We can't use insert_id() as we don't want to touch the
+       last_insert_id_used flag.
+    */
+    if (!id && thd->insert_id_used)
+      id= thd->last_insert_id;
     if (table->next_number_field)
       table->next_number_field->reset();	// Clear for next record
     if (read_info.next_line())			// Skip to next line
@@ -408,6 +418,8 @@ read_fixed_length(THD *thd,COPY_INFO &info,TABLE *table,List<Item> &fields,
     if (read_info.line_cuted)
       thd->cuted_fields++;			/* To long row */
   }
+  if (id && !read_info.error)
+    thd->insert_id(id);			// For binary/update log
   DBUG_RETURN(test(read_info.error));
 }
 
@@ -421,10 +433,12 @@ read_sep_field(THD *thd,COPY_INFO &info,TABLE *table,
   List_iterator_fast<Item> it(fields);
   Item_field *sql_field;
   uint enclosed_length;
+  ulonglong id;
   DBUG_ENTER("read_sep_field");
 
   enclosed_length=enclosed.length();
-
+  id=0;
+  
   for (;;it.rewind())
   {
     if (thd->killed)
@@ -477,6 +491,14 @@ read_sep_field(THD *thd,COPY_INFO &info,TABLE *table,
     }
     if (write_record(table,&info))
       DBUG_RETURN(1);
+    /*
+      If auto_increment values are used, save the first one
+       for LAST_INSERT_ID() and for the binary/update log.
+       We can't use insert_id() as we don't want to touch the
+       last_insert_id_used flag.
+    */
+    if (!id && thd->insert_id_used)
+      id= thd->last_insert_id;
     if (table->next_number_field)
       table->next_number_field->reset();	// Clear for next record
     if (read_info.next_line())			// Skip to next line
@@ -484,6 +506,8 @@ read_sep_field(THD *thd,COPY_INFO &info,TABLE *table,
     if (read_info.line_cuted)
       thd->cuted_fields++;			/* To long row */
   }
+  if (id && !read_info.error)
+    thd->insert_id(id);			// For binary/update log
   DBUG_RETURN(test(read_info.error));
 }