Merge with 3.23 to get fixes for --user and BACKUP TABLE

BitKeeper/etc/ignore:
  auto-union
BitKeeper/deleted/.del-delete.result:
  Delete: mysql-test/r/delete.result
BitKeeper/deleted/.del-stamp-h.in~4a5d6676232516c5:
  Auto merged
client/mysqlbinlog.cc:
  Auto merged
include/my_sys.h:
  Auto merged
libmysql/libmysql.c:
  Auto merged
mysql-test/t/delete.test:
  Auto merged
mysql-test/t/join.test:
  Auto merged
mysql-test/t/type_datetime.test:
  Auto merged
mysys/my_copy.c:
  Auto merged
sql/field.h:
  Auto merged
sql/opt_range.cc:
  Auto merged
sql/share/polish/errmsg.txt:
  Auto merged
sql/sql_rename.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
mysql-test/mysql-test-run.sh:
  merge with 3.23.56
mysql-test/r/backup.result:
  merge (needs to be updated)
mysql-test/r/join.result:
  merge (needs to be updated)
mysql-test/r/type_datetime.result:
  merge (needs to be updated)
mysql-test/t/backup.test:
  merge with 3.23
scripts/mysqld_safe.sh:
  Only use first --user option
sql/ha_myisam.cc:
  Don't let BACKUP TABLE overwrite old files
sql/log_event.h:
  merge
sql/mysql_priv.h:
  merge
sql/mysqld.cc:
  Use first --user option
sql/slave.cc:
  use local version
sql/sql_repl.h:
  use local version

7 files changed, 79 insertions, 13 deletions

diff --git a/mysql-test/mysql-test-run.sh b/mysql-test/mysql-test-run.sh
index f66300bb852..e0e9af2432a 100644
--- a/mysql-test/mysql-test-run.sh
+++ b/mysql-test/mysql-test-run.sh
@@ -1160,7 +1160,7 @@ run_testcase ()
      echo "CURRENT_TEST: $tname" >> $MASTER_MYERR
      start_master
    else
-     if [ ! -z "$EXTRA_MASTER_OPT" ] || [ x$MASTER_RUNNING != x1 ] ;
+     if [ ! -z "$EXTRA_MASTER_OPT" ] || [ x$MASTER_RUNNING != x1 ] || [ -f $master_init_script ]
      then
        EXTRA_MASTER_OPT=""
        stop_master
diff --git a/mysql-test/r/join.result b/mysql-test/r/join.result
index ddea0ac1a57..d8c45ca09ce 100644
--- a/mysql-test/r/join.result
+++ b/mysql-test/r/join.result
@@ -251,3 +251,7 @@ t1_id	t2_id	type	cost_unit	min_value	max_value	t3_id	item_id	id	name
 22	1	Percent	Cost	100	-1	6	291	1	s1
 23	1	Percent	Cost	100	-1	21	291	1	s1
 drop table t1,t2;
+rate_code	base_rate
+cust	20
+rate_code	base_rate
+cust	20
diff --git a/mysql-test/t/backup-master.sh b/mysql-test/t/backup-master.sh
new file mode 100755
index 00000000000..99da5857afe
--- /dev/null
+++ b/mysql-test/t/backup-master.sh
@@ -0,0 +1,5 @@
+#!/bin/sh
+if [ "$MYSQL_TEST_DIR" ]
+then
+  rm -f $MYSQL_TEST_DIR/var/tmp/*.frm $MYSQL_TEST_DIR/var/tmp/*.MY?
+fi
diff --git a/mysql-test/t/backup.test b/mysql-test/t/backup.test
index 55fe140850d..0346e6ba456 100644
--- a/mysql-test/t/backup.test
+++ b/mysql-test/t/backup.test
@@ -1,15 +1,22 @@
+#
+# This test is a bit tricky as we can't use backup table to overwrite an old
+# table
+#
 connect (con1,localhost,root,,);
 connect (con2,localhost,root,,);
 connection con1;
 set SQL_LOG_BIN=0;
-drop table if exists t1;
+create table t4(n int);
+--replace_result "errno: 2" "errno: X" "errno: 22" "errno: X" "errno: 23" "errno: X"
+backup table t4 to '../bogus';
+backup table t4 to '../tmp';
+--replace_result "errno: 17" "errno: X"
+backup table t4 to '../tmp';
+drop table t4;
+restore table t4 from '../tmp';
+select count(*) from t4;
+
 create table t1(n int);
---replace_result "errno = 1" "errno = X" "errno = 2" "errno = X" "errno = 22" "errno = X" "errno = 23" "errno = X"
-backup table t1 to '../bogus';
-backup table t1 to '../tmp';
-drop table t1;
-restore table t1 from '../tmp';
-select count(*) from t1;
 insert into t1 values (23),(45),(67);
 backup table t1 to '../tmp';
 drop table t1;
@@ -20,23 +27,24 @@ create table t2(m int not null primary key);
 create table t3(k int not null primary key);
 insert into t2 values (123),(145),(167);
 insert into t3 values (223),(245),(267);
-backup table t1,t2,t3 to '../tmp';
+backup table t2,t3 to '../tmp';
 drop table t1,t2,t3;
 restore table t1,t2,t3 from '../tmp';
 select n from t1;
 select m from t2;
 select k from t3;
-drop table t1,t2,t3;
+drop table t1,t2,t3,t4;
 restore table t1 from '../tmp';
 connection con2;
+rename table t1 to t5;
 --send
-lock tables t1 write;
+lock tables t5 write;
 connection con1;
 --send
-backup table t1 to '../tmp';
+backup table t5 to '../tmp';
 connection con2;
 reap;
 unlock tables;
 connection con1;
 reap;
-drop table t1;
+drop table t5;
diff --git a/mysql-test/t/delete.test b/mysql-test/t/delete.test
index 953e22cdd55..13fa617b3cf 100644
--- a/mysql-test/t/delete.test
+++ b/mysql-test/t/delete.test
@@ -35,3 +35,23 @@ create table t1 (a bigint not null, primary key (a,a,a,a,a,a,a,a,a,a));
 insert into t1 values (2),(4),(6),(8),(10),(12),(14),(16),(18),(20),(22),(24),(26),(23),(27);
 delete from t1 where a=27;
 drop table t1;
+
+#
+# CHAR(0) bug - not actually DELETE bug, but anyway...
+#
+
+CREATE TABLE t1 (
+  bool     char(0) default NULL,
+  not_null varchar(20) binary NOT NULL default '',
+  misc     integer not null,
+  PRIMARY KEY  (not_null)
+) TYPE=MyISAM;
+
+INSERT INTO t1 VALUES (NULL,'a',4), (NULL,'b',5), (NULL,'c',6), (NULL,'d',7);
+
+select * from t1 where misc > 5 and bool is null;
+delete   from t1 where misc > 5 and bool is null;
+select * from t1 where misc > 5 and bool is null;
+
+drop table t1;
+
diff --git a/mysql-test/t/join.test b/mysql-test/t/join.test
index 70980f656ab..63ec90f854c 100644
--- a/mysql-test/t/join.test
+++ b/mysql-test/t/join.test
@@ -247,3 +247,27 @@ CREATE TABLE t2 (
 INSERT INTO t2 VALUES (1,'s1'),(2,'s2'),(3,'s3'),(4,'s4'),(5,'s5');
 select t1.*, t2.*  from t1, t2 where t2.id=t1.t2_id limit 2;
 drop table t1,t2;
+
+#
+# Bug in range optimiser with MAYBE_KEY
+#
+
+CREATE TABLE t1 (
+  siteid varchar(25) NOT NULL default '',
+  emp_id varchar(30) NOT NULL default '',
+  rate_code varchar(10) default NULL,
+  UNIQUE KEY site_emp (siteid,emp_id),
+  KEY siteid (siteid)
+) TYPE=MyISAM;
+INSERT INTO t1 VALUES ('rivercats','psmith','cust'), ('rivercats','KWalker','cust');
+CREATE TABLE t2 (
+  siteid varchar(25) NOT NULL default '',
+  rate_code varchar(10) NOT NULL default '',
+  base_rate float NOT NULL default '0',
+  PRIMARY KEY  (siteid,rate_code),
+  FULLTEXT KEY rate_code (rate_code)
+) TYPE=MyISAM;
+INSERT INTO t2 VALUES ('rivercats','cust',20);
+SELECT emp.rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE emp.emp_id = 'psmith' AND lr.siteid = 'rivercats';
+SELECT emp.rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE lr.siteid = 'rivercats' AND emp.emp_id = 'psmith';
+drop table t1,t2;
diff --git a/mysql-test/t/type_datetime.test b/mysql-test/t/type_datetime.test
index a516bc89f99..f5103958979 100644
--- a/mysql-test/t/type_datetime.test
+++ b/mysql-test/t/type_datetime.test
@@ -59,3 +59,8 @@ INSERT INTO t1 (numfacture,expedition) VALUES ('1212','0001-00-00 00:00:00');
 SELECT * FROM t1 WHERE expedition='0001-00-00 00:00:00';
 EXPLAIN SELECT * FROM t1 WHERE expedition='0001-00-00 00:00:00';
 drop table t1;
+create table t1 (a datetime not null, b datetime not null);
+insert into t1 values (now(), now());
+insert into t1 values (now(), now());
+select * from t1 where a is null or b is null;
+drop table t1;