Automatic merge with 5.1

26 files changed, 1665 insertions, 964 deletions

diff --git a/mysql-test/Makefile.am b/mysql-test/Makefile.am
index e565521a8b0..07cf5fc8e7b 100644
--- a/mysql-test/Makefile.am
+++ b/mysql-test/Makefile.am
@@ -109,6 +109,7 @@ TEST_DIRS = t r include std_data std_data/parts collections \
 	suite/innodb suite/innodb/t suite/innodb/r suite/innodb/include \
 	suite/innodb_plugin suite/innodb_plugin/t suite/innodb_plugin/r \
 	suite/innodb_plugin/include \
+	suite/handler \
 	suite/engines suite/engines/funcs suite/engines/iuds suite/engines/rr_trx \
 	suite/engines/funcs/r suite/engines/funcs/t suite/engines/iuds/r \
 	suite/engines/iuds/t suite/engines/rr_trx/include suite/engines/rr_trx/r \
diff --git a/mysql-test/mysql-test-run.pl b/mysql-test/mysql-test-run.pl
index 745fed0ceb8..962f0553b01 100755
--- a/mysql-test/mysql-test-run.pl
+++ b/mysql-test/mysql-test-run.pl
@@ -142,7 +142,7 @@ my $path_config_file;           # The generated config file, var/my.cnf
 # executables will be used by the test suite.
 our $opt_vs_config = $ENV{'MTR_VS_CONFIG'};
 
-my $DEFAULT_SUITES= "main,binlog,federated,rpl,maria,parts,innodb,innodb_plugin,percona,ndb,vcol,oqgraph,sphinx";
+my $DEFAULT_SUITES= "main,binlog,federated,rpl,maria,handler,parts,innodb,innodb_plugin,percona,ndb,vcol,oqgraph,sphinx";
 my $opt_suites;
 
 our $opt_verbose= 0;  # Verbose output, enable with --verbose
diff --git a/mysql-test/r/lock_multi.result b/mysql-test/r/lock_multi.result
index d8768e802ea..3fc4de3da06 100644
--- a/mysql-test/r/lock_multi.result
+++ b/mysql-test/r/lock_multi.result
@@ -162,13 +162,6 @@ ERROR 70100: Query execution was interrupted
 unlock tables;
 drop table t1;
 drop table if exists t1;
-create table t1 (a int) ENGINE=MEMORY;
---> client 2
-handler t1 open;
-ERROR HY000: Table storage engine for 't1' doesn't have this option
---> client 1
-drop table t1;
-drop table if exists t1;
 create table t1 (i int);
 connection: default
 lock tables t1 write;
diff --git a/mysql-test/suite/handler/aria.result b/mysql-test/suite/handler/aria.result
new file mode 100644
index 00000000000..a912a2559e3
--- /dev/null
+++ b/mysql-test/suite/handler/aria.result
@@ -0,0 +1,671 @@
+SET SESSION STORAGE_ENGINE = Aria;
+drop table if exists t1,t3,t4,t5;
+create table t1 (a int, b char(10), key a  (a), key b  (a,b));
+insert into t1 values
+(17,"ddd"),(18,"eee"),(19,"fff"),(19,"yyy"),
+(14,"aaa"),(16,"ccc"),(16,"xxx"),
+(20,"ggg"),(21,"hhh"),(22,"iii");
+handler t1 open as t2;
+handler t2 read a first;
+a	b
+14	aaa
+handler t2 read a next;
+a	b
+16	ccc
+handler t2 read a next;
+a	b
+16	xxx
+handler t2 read a prev;
+a	b
+16	ccc
+handler t2 read a last;
+a	b
+22	iii
+handler t2 read a prev;
+a	b
+21	hhh
+handler t2 read a prev;
+a	b
+20	ggg
+handler t2 read a first;
+a	b
+14	aaa
+handler t2 read a prev;
+a	b
+handler t2 read a last;
+a	b
+22	iii
+handler t2 read a prev;
+a	b
+21	hhh
+handler t2 read a next;
+a	b
+22	iii
+handler t2 read a next;
+a	b
+handler t2 read a=(15);
+a	b
+handler t2 read a=(16);
+a	b
+16	ccc
+handler t2 read a=(19,"fff");
+ERROR 42000: Too many key parts specified; max 1 parts allowed
+handler t2 read b=(19,"fff");
+a	b
+19	fff
+handler t2 read b=(19,"yyy");
+a	b
+19	yyy
+handler t2 read b=(19);
+a	b
+19	fff
+handler t1 read a last;
+ERROR 42S02: Unknown table 't1' in HANDLER
+handler t2 read a=(11);
+a	b
+handler t2 read a>=(11);
+a	b
+14	aaa
+handler t2 read a=(18);
+a	b
+18	eee
+handler t2 read a>=(18);
+a	b
+18	eee
+handler t2 read a>(18);
+a	b
+19	fff
+handler t2 read a<=(18);
+a	b
+18	eee
+handler t2 read a<(18);
+a	b
+17	ddd
+handler t2 read a=(15);
+a	b
+handler t2 read a>=(15);
+a	b
+16	ccc
+handler t2 read a>(15);
+a	b
+16	ccc
+handler t2 read a<=(15);
+a	b
+14	aaa
+handler t2 read a<(15);
+a	b
+14	aaa
+handler t2 read a=(54);
+a	b
+handler t2 read a>=(54);
+a	b
+handler t2 read a>(54);
+a	b
+handler t2 read a<=(54);
+a	b
+22	iii
+handler t2 read a<(54);
+a	b
+22	iii
+handler t2 read a=(1);
+a	b
+handler t2 read a>=(1);
+a	b
+14	aaa
+handler t2 read a>(1);
+a	b
+14	aaa
+handler t2 read a<=(1);
+a	b
+handler t2 read a<(1);
+a	b
+handler t2 read a first limit 5;
+a	b
+14	aaa
+16	ccc
+16	xxx
+17	ddd
+18	eee
+handler t2 read a next  limit 3;
+a	b
+19	fff
+19	yyy
+20	ggg
+handler t2 read a prev  limit 10;
+a	b
+19	yyy
+19	fff
+18	eee
+17	ddd
+16	xxx
+16	ccc
+14	aaa
+handler t2 read a>=(16) limit 4;
+a	b
+16	ccc
+16	xxx
+17	ddd
+18	eee
+handler t2 read a>=(16) limit 2,2;
+a	b
+17	ddd
+18	eee
+handler t2 read a last  limit 3;
+a	b
+22	iii
+21	hhh
+20	ggg
+handler t2 read a=(19);
+a	b
+19	fff
+handler t2 read a=(19) where b="yyy";
+a	b
+19	yyy
+handler t2 read first;
+a	b
+17	ddd
+handler t2 read next;
+a	b
+18	eee
+handler t2 read next;
+a	b
+19	fff
+handler t2 close;
+handler t1 open;
+handler t1 read a next;
+a	b
+14	aaa
+handler t1 read a next;
+a	b
+16	ccc
+handler t1 close;
+handler t1 open;
+handler t1 read a prev;
+a	b
+22	iii
+handler t1 read a prev;
+a	b
+21	hhh
+handler t1 close;
+handler t1 open as t2;
+handler t2 read first;
+a	b
+17	ddd
+alter table t1 engine = Aria;
+handler t2 read first;
+ERROR 42S02: Unknown table 't2' in HANDLER
+handler t1 open as t2;
+drop table t1;
+create table t1 (a int not null);
+insert into t1 values (17);
+handler t2 read first;
+ERROR 42S02: Unknown table 't2' in HANDLER
+handler t1 open as t2;
+alter table t1 engine=CSV;
+handler t2 read first;
+ERROR 42S02: Unknown table 't2' in HANDLER
+drop table t1;
+create table t1 (a int);
+insert into t1 values (1),(2),(3),(4),(5),(6);
+delete from t1 limit 2;
+handler t1 open;
+handler t1 read first;
+a
+3
+handler t1 read first limit 1,1;
+a
+4
+handler t1 read first limit 2,2;
+a
+5
+6
+delete from t1 limit 3;
+handler t1 read first;
+a
+6
+drop table t1;
+create table t1(a int, index  (a));
+insert into t1 values (1), (2), (3);
+handler t1 open;
+handler t1 read a=(W);
+ERROR 42S22: Unknown column 'W' in 'field list'
+handler t1 read a=(a);
+ERROR HY000: Incorrect arguments to HANDLER ... READ
+drop table t1;
+create table t1 (a char(5));
+insert into t1 values ("Ok");
+handler t1 open as t;
+handler t read first;
+a
+Ok
+use mysql;
+handler t read first;
+a
+Ok
+handler t close;
+handler test.t1 open as t;
+handler t read first;
+a
+Ok
+handler t close;
+use test;
+drop table t1;
+create table t1 ( a int, b int, INDEX a  (a) );
+insert into t1 values (1,2), (2,1);
+handler t1 open;
+handler t1 read a=(1) where b=2;
+a	b
+1	2
+handler t1 read a=(1) where b=3;
+a	b
+handler t1 read a=(1) where b=1;
+a	b
+handler t1 close;
+drop table t1;
+create table t1 (c1 char(20));
+insert into t1 values ("t1");
+handler t1 open as h1;
+handler h1 read first limit 9;
+c1
+t1
+create table t2 (c1 char(20));
+insert into t2 values ("t2");
+handler t2 open as h2;
+handler h2 read first limit 9;
+c1
+t2
+create table t3 (c1 char(20));
+insert into t3 values ("t3");
+handler t3 open as h3;
+handler h3 read first limit 9;
+c1
+t3
+create table t4 (c1 char(20));
+insert into t4 values ("t4");
+handler t4 open as h4;
+handler h4 read first limit 9;
+c1
+t4
+create table t5 (c1 char(20));
+insert into t5 values ("t5");
+handler t5 open as h5;
+handler h5 read first limit 9;
+c1
+t5
+alter table t1 engine=MyISAM;
+handler h1 read first limit 9;
+ERROR 42S02: Unknown table 'h1' in HANDLER
+handler h2 read first limit 9;
+c1
+t2
+handler h3 read first limit 9;
+c1
+t3
+handler h4 read first limit 9;
+c1
+t4
+handler h5 read first limit 9;
+c1
+t5
+alter table t5 engine=MyISAM;
+handler h1 read first limit 9;
+ERROR 42S02: Unknown table 'h1' in HANDLER
+handler h2 read first limit 9;
+c1
+t2
+handler h3 read first limit 9;
+c1
+t3
+handler h4 read first limit 9;
+c1
+t4
+handler h5 read first limit 9;
+ERROR 42S02: Unknown table 'h5' in HANDLER
+alter table t3 engine=MyISAM;
+handler h1 read first limit 9;
+ERROR 42S02: Unknown table 'h1' in HANDLER
+handler h2 read first limit 9;
+c1
+t2
+handler h3 read first limit 9;
+ERROR 42S02: Unknown table 'h3' in HANDLER
+handler h4 read first limit 9;
+c1
+t4
+handler h5 read first limit 9;
+ERROR 42S02: Unknown table 'h5' in HANDLER
+handler h2 close;
+handler h4 close;
+handler t1 open as h1_1;
+handler t1 open as h1_2;
+handler t1 open as h1_3;
+handler h1_1 read first limit 9;
+c1
+t1
+handler h1_2 read first limit 9;
+c1
+t1
+handler h1_3 read first limit 9;
+c1
+t1
+alter table t1 engine=Aria;
+handler h1_1 read first limit 9;
+ERROR 42S02: Unknown table 'h1_1' in HANDLER
+handler h1_2 read first limit 9;
+ERROR 42S02: Unknown table 'h1_2' in HANDLER
+handler h1_3 read first limit 9;
+ERROR 42S02: Unknown table 'h1_3' in HANDLER
+drop table t1;
+drop table t2;
+drop table t3;
+drop table t4;
+drop table t5;
+create table t1 (c1 int);
+insert into t1 values (1);
+handler t1 open;
+handler t1 read first;
+c1
+1
+send the below to another connection, do not wait for the result
+optimize table t1;
+proceed with the normal connection
+handler t1 read next;
+c1
+1
+handler t1 close;
+read the result from the other connection
+Table	Op	Msg_type	Msg_text
+test.t1	optimize	status	OK
+proceed with the normal connection
+drop table t1;
+CREATE TABLE t1 (  no1 smallint(5) NOT NULL default '0',  no2 int(10) NOT NULL default '0',  PRIMARY KEY  (no1,no2));
+INSERT INTO t1 VALUES (1,274),(1,275),(2,6),(2,8),(4,1),(4,2);
+HANDLER t1 OPEN;
+HANDLER t1 READ `primary` = (1, 1000);
+no1	no2
+HANDLER t1 READ `primary` PREV;
+no1	no2
+1	275
+HANDLER t1 READ `primary` = (1, 1000);
+no1	no2
+HANDLER t1 READ `primary` NEXT;
+no1	no2
+2	6
+DROP TABLE t1;
+create table t1 (c1 int);
+insert into t1 values (14397);
+flush tables with read lock;
+drop table t1;
+ERROR HY000: Can't execute the query because you have a conflicting read lock
+send the below to another connection, do not wait for the result
+drop table t1;
+proceed with the normal connection
+select * from t1;
+c1
+14397
+unlock tables;
+read the result from the other connection
+proceed with the normal connection
+select * from t1;
+ERROR 42S02: Table 'test.t1' doesn't exist
+drop table if exists t1;
+Warnings:
+Note	1051	Unknown table 't1'
+create table t1 (a int not null) ENGINE=CSV;
+--> client 2
+handler t1 open;
+ERROR HY000: Table storage engine for 't1' doesn't have this option
+--> client 1
+drop table t1;
+create table t1 (a int);
+handler t1 open as t1_alias;
+handler t1_alias read a next;
+ERROR 42000: Key 'a' doesn't exist in table 't1_alias'
+handler t1_alias READ a next where inexistent > 0;
+ERROR 42S22: Unknown column 'inexistent' in 'field list'
+handler t1_alias read a next;
+ERROR 42000: Key 'a' doesn't exist in table 't1_alias'
+handler t1_alias READ a next where inexistent > 0;
+ERROR 42S22: Unknown column 'inexistent' in 'field list'
+handler t1_alias close;
+drop table t1;
+create temporary table t1 (a int, b char(1), key a  (a), key b(a,b));
+insert into t1 values (0,"a"),(1,"b"),(2,"c"),(3,"d"),(4,"e"),
+(5,"f"),(6,"g"),(7,"h"),(8,"i"),(9,"j"),(9,'k');
+select a,b from t1;
+a	b
+0	a
+1	b
+2	c
+3	d
+4	e
+5	f
+6	g
+7	h
+8	i
+9	j
+9	k
+handler t1 open as a1;
+handler a1 read a=(1);
+a	b
+1	b
+handler a1 read a next;
+a	b
+2	c
+handler a1 read a next;
+a	b
+3	d
+select a,b from t1;
+ERROR HY000: Can't reopen table: 'a1'
+handler a1 read a prev;
+a	b
+2	c
+handler a1 read a prev;
+a	b
+1	b
+handler a1 read a=(6) where b="g";
+a	b
+6	g
+handler a1 close;
+select a,b from t1;
+a	b
+0	a
+1	b
+2	c
+3	d
+4	e
+5	f
+6	g
+7	h
+8	i
+9	j
+9	k
+handler t1 open as a2;
+handler a2 read a=(9);
+a	b
+9	j
+handler a2 read a next;
+a	b
+9	k
+handler a2 read a prev limit 2;
+a	b
+9	j
+8	i
+handler a2 read a last;
+a	b
+9	k
+handler a2 read a prev;
+a	b
+9	j
+handler a2 close;
+drop table t1;
+create table t1 (a int);
+create temporary table t2 (a int, key  (a));
+handler t1 open as a1;
+handler t2 open as a2;
+handler a2 read a first;
+a
+drop table t1, t2;
+handler a2 read a next;
+ERROR 42S02: Unknown table 'a2' in HANDLER
+handler a1 close;
+ERROR 42S02: Unknown table 'a1' in HANDLER
+create table t1 (a int, key  (a));
+create table t2 like t1;
+handler t1 open as a1;
+handler t2 open as a2;
+handler a1 read a first;
+a
+handler a2 read a first;
+a
+alter table t1 add b int;
+handler a1 close;
+ERROR 42S02: Unknown table 'a1' in HANDLER
+handler a2 close;
+drop table t1, t2;
+create table t1 (a int, key  (a));
+handler t1 open as a1;
+handler a1 read a first;
+a
+rename table t1 to t2;
+handler a1 read a first;
+ERROR 42S02: Unknown table 'a1' in HANDLER
+drop table t2;
+create table t1 (a int, key  (a));
+create table t2 like t1;
+handler t1 open as a1;
+handler t2 open as a2;
+handler a1 read a first;
+a
+handler a2 read a first;
+a
+optimize table t1;
+Table	Op	Msg_type	Msg_text
+test.t1	optimize	status	Table is already up to date
+handler a1 close;
+ERROR 42S02: Unknown table 'a1' in HANDLER
+handler a2 close;
+drop table t1, t2;
+#
+# BUG#51877 - HANDLER interface causes invalid memory read
+#
+CREATE TABLE t1(a INT, KEY  (a));
+HANDLER t1 OPEN;
+HANDLER t1 READ a FIRST;
+a
+INSERT INTO t1 VALUES(1);
+HANDLER t1 READ a NEXT;
+a
+1
+HANDLER t1 CLOSE;
+DROP TABLE t1;
+#
+# BUG #46456: HANDLER OPEN + TRUNCATE + DROP (temporary) TABLE, crash 
+#
+CREATE TABLE t1 AS SELECT 1 AS f1;
+HANDLER t1 OPEN;
+TRUNCATE t1;
+HANDLER t1 READ FIRST;
+ERROR 42S02: Unknown table 't1' in HANDLER
+DROP TABLE t1;
+CREATE TEMPORARY TABLE t1 AS SELECT 1 AS f1;
+HANDLER t1 OPEN;
+TRUNCATE t1;
+HANDLER t1 READ FIRST;
+ERROR 42S02: Unknown table 't1' in HANDLER
+DROP TABLE t1;
+#
+# Bug #54007: assert in ha_myisam::index_next , HANDLER
+#
+CREATE TABLE t1(a INT, b INT, PRIMARY KEY(a), KEY b(b), KEY ab(a, b));
+HANDLER t1 OPEN;
+HANDLER t1 READ FIRST;
+a	b
+HANDLER t1 READ `PRIMARY` NEXT;
+a	b
+HANDLER t1 READ ab NEXT;
+a	b
+HANDLER t1 READ b NEXT;
+a	b
+HANDLER t1 READ NEXT;
+a	b
+HANDLER t1 CLOSE;
+INSERT INTO t1 VALUES (2, 20), (1, 10), (4, 40), (3, 30);
+HANDLER t1 OPEN;
+HANDLER t1 READ FIRST;
+a	b
+2	20
+HANDLER t1 READ NEXT;
+a	b
+1	10
+HANDLER t1 READ `PRIMARY` NEXT;
+a	b
+1	10
+HANDLER t1 READ `PRIMARY` NEXT;
+a	b
+2	20
+HANDLER t1 READ ab NEXT;
+a	b
+1	10
+HANDLER t1 READ ab NEXT;
+a	b
+2	20
+HANDLER t1 READ b NEXT;
+a	b
+1	10
+HANDLER t1 READ b NEXT;
+a	b
+2	20
+HANDLER t1 READ b NEXT;
+a	b
+3	30
+HANDLER t1 READ b NEXT;
+a	b
+4	40
+HANDLER t1 READ b NEXT;
+a	b
+HANDLER t1 READ NEXT;
+a	b
+2	20
+HANDLER t1 READ NEXT;
+a	b
+1	10
+HANDLER t1 READ NEXT;
+a	b
+4	40
+HANDLER t1 CLOSE;
+HANDLER t1 OPEN;
+HANDLER t1 READ FIRST;
+a	b
+2	20
+HANDLER t1 READ `PRIMARY` PREV;
+a	b
+4	40
+HANDLER t1 READ `PRIMARY` PREV;
+a	b
+3	30
+HANDLER t1 READ b PREV;
+a	b
+4	40
+HANDLER t1 READ b PREV;
+a	b
+3	30
+HANDLER t1 CLOSE;
+HANDLER t1 OPEN;
+HANDLER t1 READ FIRST;
+a	b
+2	20
+HANDLER t1 READ `PRIMARY` PREV LIMIT 3;
+a	b
+4	40
+3	30
+2	20
+HANDLER t1 READ b NEXT LIMIT 5;
+a	b
+1	10
+2	20
+3	30
+4	40
+HANDLER t1 CLOSE;
+DROP TABLE t1;
+End of 5.1 tests
diff --git a/mysql-test/suite/handler/aria.test b/mysql-test/suite/handler/aria.test
new file mode 100644
index 00000000000..1913d2b791c
--- /dev/null
+++ b/mysql-test/suite/handler/aria.test
@@ -0,0 +1,82 @@
+# t/handler_innodb.test
+#
+# test of HANDLER ...
+#
+# Last update:
+# 2006-07-31 ML test refactored (MySQL 5.1)
+#               code of t/handler.test and t/innodb_handler.test united
+#               main testing code put into handler.inc
+#               rename t/innodb_handler.test to t/handler_innodb.test
+#
+
+--source include/have_maria.inc
+let $engine_type= Aria;
+
+--source init.inc
+--source handler.inc
+
+--echo #
+--echo # BUG #46456: HANDLER OPEN + TRUNCATE + DROP (temporary) TABLE, crash 
+--echo #
+CREATE TABLE t1 AS SELECT 1 AS f1; 
+HANDLER t1 OPEN;
+TRUNCATE t1;
+--error ER_UNKNOWN_TABLE
+HANDLER t1 READ FIRST;
+DROP TABLE t1;
+
+CREATE TEMPORARY TABLE t1 AS SELECT 1 AS f1; 
+HANDLER t1 OPEN;
+TRUNCATE t1;
+--error ER_UNKNOWN_TABLE
+HANDLER t1 READ FIRST;
+DROP TABLE t1;
+
+--echo #
+--echo # Bug #54007: assert in ha_myisam::index_next , HANDLER
+--echo #
+CREATE TABLE t1(a INT, b INT, PRIMARY KEY(a), KEY b(b), KEY ab(a, b));
+
+HANDLER t1 OPEN;
+HANDLER t1 READ FIRST;
+HANDLER t1 READ `PRIMARY` NEXT;
+HANDLER t1 READ ab NEXT;
+HANDLER t1 READ b NEXT;
+HANDLER t1 READ NEXT;
+HANDLER t1 CLOSE;
+
+INSERT INTO t1 VALUES (2, 20), (1, 10), (4, 40), (3, 30);
+HANDLER t1 OPEN;
+HANDLER t1 READ FIRST;
+HANDLER t1 READ NEXT;
+HANDLER t1 READ `PRIMARY` NEXT;
+HANDLER t1 READ `PRIMARY` NEXT;
+HANDLER t1 READ ab NEXT;
+HANDLER t1 READ ab NEXT;
+HANDLER t1 READ b NEXT;
+HANDLER t1 READ b NEXT;
+HANDLER t1 READ b NEXT;
+HANDLER t1 READ b NEXT;
+HANDLER t1 READ b NEXT;
+HANDLER t1 READ NEXT;
+HANDLER t1 READ NEXT;
+HANDLER t1 READ NEXT;
+HANDLER t1 CLOSE;
+
+HANDLER t1 OPEN;
+HANDLER t1 READ FIRST;
+HANDLER t1 READ `PRIMARY` PREV;
+HANDLER t1 READ `PRIMARY` PREV;
+HANDLER t1 READ b PREV;
+HANDLER t1 READ b PREV;
+HANDLER t1 CLOSE;
+
+HANDLER t1 OPEN;
+HANDLER t1 READ FIRST;
+HANDLER t1 READ `PRIMARY` PREV LIMIT 3;
+HANDLER t1 READ b NEXT LIMIT 5;
+HANDLER t1 CLOSE;
+
+DROP TABLE t1;
+
+--echo End of 5.1 tests
diff --git a/mysql-test/include/handler.inc b/mysql-test/suite/handler/handler.inc
index 6e7f53ba9b2..48ed2ce0b8a 100644
--- a/mysql-test/include/handler.inc
+++ b/mysql-test/suite/handler/handler.inc
@@ -1,5 +1,7 @@
-# include/handler.inc
+# handler.inc
 #
+# See init.inc for setup of variables for this script
+# 
 # The variables
 #     $engine_type       -- storage engine to be tested
 #     $other_engine_type -- storage engine <> $engine_type
@@ -8,31 +10,19 @@
 #                           2. $other_handler_engine_type must point to an all
 #                              time available storage engine
 #                              2006-08 MySQL 5.1 MyISAM and MEMORY only
-# have to be set before sourcing this script.
--- source include/not_embedded.inc
 #
 # test of HANDLER ...
 #
 # Last update:
 # 2006-07-31 ML test refactored (MySQL 5.1)
 #               code of t/handler.test and t/innodb_handler.test united
-#               main testing code put into include/handler.inc
+#               main testing code put into handler.inc
 #
 
-eval SET SESSION STORAGE_ENGINE = $engine_type;
-
---disable_warnings
-drop table if exists t1,t3,t4,t5;
---enable_warnings
-
-create table t1 (a int, b char(10), key a(a), key b(a,b));
-insert into t1 values
-(17,"ddd"),(18,"eee"),(19,"fff"),(19,"yyy"),
-(14,"aaa"),(15,"bbb"),(16,"ccc"),(16,"xxx"),
-(20,"ggg"),(21,"hhh"),(22,"iii");
+#
+# Start testing the table created in init.inc
+#
 handler t1 open as t2;
--- error 1064
-handler t2 read a=(SELECT 1);
 handler t2 read a first;
 handler t2 read a next;
 handler t2 read a next;
@@ -65,12 +55,34 @@ handler t1 read a last;
 handler t2 read a=(11);
 handler t2 read a>=(11);
 
+# Search on something we ca nfind
 handler t2 read a=(18);
 handler t2 read a>=(18);
 handler t2 read a>(18);
 handler t2 read a<=(18);
 handler t2 read a<(18);
 
+# Search on something we can't find
+handler t2 read a=(15);
+handler t2 read a>=(15);
+handler t2 read a>(15);
+handler t2 read a<=(15);
+handler t2 read a<(15);
+
+# Search from upper end
+handler t2 read a=(54);
+handler t2 read a>=(54);
+handler t2 read a>(54);
+handler t2 read a<=(54);
+handler t2 read a<(54);
+
+# Search from lower end
+handler t2 read a=(1);
+handler t2 read a>=(1);
+handler t2 read a>(1);
+handler t2 read a<=(1);
+handler t2 read a<(1);
+
 handler t2 read a first limit 5;
 handler t2 read a next  limit 3;
 handler t2 read a prev  limit 10;
@@ -85,8 +97,6 @@ handler t2 read a=(19) where b="yyy";
 handler t2 read first;
 handler t2 read next;
 handler t2 read next;
---error 1064
-handler t2 read last;
 handler t2 close;
 
 handler t1 open;
@@ -110,7 +120,7 @@ handler t2 read first;
 #
 handler t1 open as t2;
 drop table t1;
-create table t1 (a int);
+create table t1 (a int not null);
 insert into t1 values (17);
 --error 1109
 handler t2 read first;
@@ -137,7 +147,7 @@ drop table t1;
 #
 # Test for #751
 #
-create table t1(a int, index(a));
+eval create table t1(a int, index $key_type (a));
 insert into t1 values (1), (2), (3);
 handler t1 open;
 --error 1054
@@ -164,7 +174,7 @@ drop table t1;
 #
 # BUG#3649
 #
-create table t1 ( a int, b int, INDEX a (a) );
+eval create table t1 ( a int, b int, INDEX a $key_type (a) );
 insert into t1 values (1,2), (2,1);
 handler t1 open;
 handler t1 read a=(1) where b=2;
@@ -174,143 +184,6 @@ handler t1 close;
 drop table t1;
 
 #
-# Check if two database names beginning the same are seen as different.
-#
-# This database begins like the usual 'test' database.
-#
---disable_warnings
-drop database if exists test_test;
---enable_warnings
-create database test_test;
-use test_test;
-create table t1(table_id char(20) primary key);
-insert into t1 values ('test_test.t1');
-insert into t1 values ('');
-handler t1 open;
-handler t1 read first limit 9;
-create table t2(table_id char(20) primary key);
-insert into t2 values ('test_test.t2');
-insert into t2 values ('');
-handler t2 open;
-handler t2 read first limit 9;
-#
-# This is the usual 'test' database.
-#
-use test;
---disable_warnings
-drop table if exists t1;
---enable_warnings
-create table t1(table_id char(20) primary key);
-insert into t1 values ('test.t1');
-insert into t1 values ('');
---error 1066
-handler t1 open;
-#
-# Check accesibility of all the tables.
-#
-use test;
---error 1064
-handler test.t1 read first limit 9;
---error 1064
-handler test_test.t1 read first limit 9;
-handler t1 read first limit 9;
---error 1064
-handler test_test.t2 read first limit 9;
-handler t2 read first limit 9;
-
-#
-# Cleanup.
-#
-
---error 1064
-handler test_test.t1 close;
-handler t1 close;
-drop table test_test.t1;
---error 1064
-handler test_test.t2 close;
-handler t2 close;
-drop table test_test.t2;
-drop database test_test;
-
-#
-use test;
---error 1064
-handler test.t1 close;
---error 1109
-handler t1 close;
-drop table test.t1;
-
-#
-# BUG#4335
-#
---disable_warnings
-drop database if exists test_test;
-drop table if exists t1;
-drop table if exists t2;
-drop table if exists t3;
---enable_warnings
-create database test_test;
-use test_test;
-create table t1 (c1 char(20));
-insert into t1 values ('test_test.t1');
-create table t3 (c1 char(20));
-insert into t3 values ('test_test.t3');
-handler t1 open;
-handler t1 read first limit 9;
-handler t1 open h1;
-handler h1 read first limit 9;
-use test;
-create table t1 (c1 char(20));
-create table t2 (c1 char(20));
-create table t3 (c1 char(20));
-insert into t1 values ('t1');
-insert into t2 values ('t2');
-insert into t3 values ('t3');
---error 1066
-handler t1 open;
---error 1066
-handler t2 open t1;
---error 1066
-handler t3 open t1;
-handler t1 read first limit 9;
---error 1064
-handler test.t1 close;
---error 1066
-handler test.t1 open h1;
---error 1066
-handler test_test.t1 open h1;
-handler test_test.t3 open h3;
-handler test.t1 open h2;
-handler t1 read first limit 9;
-handler h1 read first limit 9;
-handler h2 read first limit 9;
-handler h3 read first limit 9;
-handler h2 read first limit 9;
---error 1064
-handler test.h1 close;
-handler t1 close;
-handler h1 close;
-handler h2 close;
---error 1109
-handler t1 read first limit 9;
---error 1109
-handler h1 read first limit 9;
---error 1109
-handler h2 read first limit 9;
-handler h3 read first limit 9;
-handler h3 read first limit 9;
-use test_test;
-handler h3 read first limit 9;
---error 1064
-handler test.h3 read first limit 9;
-handler h3 close;
-use test;
-drop table t3;
-drop table t2;
-drop table t1;
-drop database test_test;
-
-#
 # Test if fix for BUG#4286 correctly closes handler tables.
 #
 create table t1 (c1 char(20));
@@ -410,11 +283,13 @@ reap;
 connection default;
 drop table t1;
 
-CREATE TABLE t1 (  no1 smallint(5) NOT NULL default '0',  no2 int(10) NOT NULL default '0',  PRIMARY KEY  (no1,no2));
+eval CREATE TABLE t1 (  no1 smallint(5) NOT NULL default '0',  no2 int(10) NOT NULL default '0',  PRIMARY KEY $key_type (no1,no2));
 INSERT INTO t1 VALUES (1,274),(1,275),(2,6),(2,8),(4,1),(4,2);
 HANDLER t1 OPEN;
 HANDLER t1 READ `primary` = (1, 1000);
 HANDLER t1 READ `primary` PREV;
+HANDLER t1 READ `primary` = (1, 1000);
+HANDLER t1 READ `primary` NEXT;
 DROP TABLE t1;
 
 # End of 4.1 tests
@@ -468,10 +343,7 @@ drop table if exists t1;
 #
 # Bug#25856 - HANDLER table OPEN in one connection lock DROP TABLE in another one
 #
---disable_warnings
-drop table if exists t1;
---enable_warnings
-eval create table t1 (a int) ENGINE=$other_engine_type;
+eval create table t1 (a int not null) ENGINE=$other_engine_type;
 --echo --> client 2
 connection con2;
 --error 1031
@@ -484,9 +356,6 @@ disconnect con2;
 #
 # Bug#30632 HANDLER read failure causes hang
 #
---disable_warnings
-drop table if exists t1;
---enable_warnings
 create table t1 (a int);
 handler t1 open as t1_alias;
 --error 1176
@@ -501,89 +370,18 @@ handler t1_alias close;
 drop table t1;
 
 #
-# Bug#21587 FLUSH TABLES causes server crash when used with HANDLER statements
-#
-
---disable_warnings
-drop table if exists t1,t2;
---enable_warnings
-create table t1 (c1 int);
-create table t2 (c1 int);
-insert into t1 values (1);
-insert into t2 values (2);
---echo connection: default
-handler t1 open;
-handler t1 read first;
-connect (flush,localhost,root,,);
-connection flush;
---echo connection: flush
---send flush tables;
-connection default;
---echo connection: default
-let $wait_condition=
-  select count(*) = 1 from information_schema.processlist
-  where state = "Flushing tables";
---source include/wait_condition.inc
-handler t2 open;
-handler t2 read first;
-handler t1 read next;
-handler t1 close;
-handler t2 close;
-connection flush;
-reap;
-connection default;
-drop table t1,t2;
-disconnect flush;
-
-#
-# Bug#31409 RENAME TABLE causes server crash or deadlock when used with HANDLER statements
-#
-
---disable_warnings
-drop table if exists t1,t2;
---enable_warnings
-create table t1 (c1 int);
---echo connection: default
-handler t1 open;
-handler t1 read first;
-connect (flush,localhost,root,,);
-connection flush;
---echo connection: flush
---send rename table t1 to t2;
-connection default;
---echo connection: default
-let $wait_condition=
-  select count(*) = 1 from information_schema.processlist
-  where state = "Waiting for table" and info = "rename table t1 to t2";
---source include/wait_condition.inc
-handler t2 open;
-handler t2 read first;
---error ER_NO_SUCH_TABLE
-handler t1 read next;
-handler t1 close;
-handler t2 close;
-connection flush;
-reap;
-connection default;
-drop table t2;
-disconnect flush;
-
-#
 # Bug#30882 Dropping a temporary table inside a stored function may cause a server crash
 #
 # Test HANDLER statements in conjunction with temporary tables. While the temporary table
 # is open by a HANDLER, no other statement can access it.
 #
 
---disable_warnings
-drop table if exists t1;
---enable_warnings
-create temporary table t1 (a int, b char(1), key a(a), key b(a,b));
+eval create temporary table t1 (a int, b char(1), key a $key_type (a), key b(a,b));
 insert into t1 values (0,"a"),(1,"b"),(2,"c"),(3,"d"),(4,"e"),
-                      (5,"f"),(6,"g"),(7,"h"),(8,"i"),(9,"j");
+                      (5,"f"),(6,"g"),(7,"h"),(8,"i"),(9,"j"),(9,'k');
 select a,b from t1;
 handler t1 open as a1;
-handler a1 read a first;
+handler a1 read a=(1);
 handler a1 read a next;
 handler a1 read a next;
 --error ER_CANT_REOPEN_TABLE
@@ -594,41 +392,19 @@ handler a1 read a=(6) where b="g";
 handler a1 close;
 select a,b from t1;
 handler t1 open as a2;
-handler a2 read a first;
+handler a2 read a=(9);
+handler a2 read a next;
+handler a2 read a prev limit 2;
+--error 0,1031
 handler a2 read a last;
 handler a2 read a prev;
 handler a2 close;
 drop table t1;
 
-#
-# Bug#31397 Inconsistent drop table behavior of handler tables.
-#
-
---disable_warnings
-drop table if exists t1,t2;
---enable_warnings
-create table t1 (a int);
-handler t1 open as t1_alias;
-drop table t1;
-create table t1 (a int);
-handler t1 open as t1_alias;
-flush tables;
-drop table t1;
-create table t1 (a int);
-handler t1 open as t1_alias;
-handler t1_alias close;
-drop table t1;
-create table t1 (a int);
-handler t1 open as t1_alias;
-handler t1_alias read first;
-drop table t1;
---error ER_UNKNOWN_TABLE
-handler t1_alias read next;
-
 # Test that temporary tables associated with handlers are properly dropped.
 
 create table t1 (a int);
-create temporary table t2 (a int, key(a));
+eval create temporary table t2 (a int, key $key_type (a));
 handler t1 open as a1;
 handler t2 open as a2;
 handler a2 read a first;
@@ -640,7 +416,7 @@ handler a1 close;
 
 # Alter table drop handlers
 
-create table t1 (a int, key(a));
+eval create table t1 (a int, key $key_type (a));
 create table t2 like t1;
 handler t1 open as a1;
 handler t2 open as a2;
@@ -654,7 +430,7 @@ drop table t1, t2;
 
 # Rename table drop handlers
 
-create table t1 (a int, key(a));
+eval create table t1 (a int, key $key_type (a));
 handler t1 open as a1;
 handler a1 read a first;
 rename table t1 to t2;
@@ -664,7 +440,7 @@ drop table t2;
 
 # Optimize table drop handlers
 
-create table t1 (a int, key(a));
+eval create table t1 (a int, key $key_type (a));
 create table t2 like t1;
 handler t1 open as a1;
 handler t2 open as a2;
@@ -676,56 +452,14 @@ handler a1 close;
 handler a2 close;
 drop table t1, t2;
 
-# Flush tables causes handlers reopen
-
-create table t1 (a int, b char(1), key a(a), key b(a,b));
-insert into t1 values (0,"a"),(1,"b"),(2,"c"),(3,"d"),(4,"e"),
-                      (5,"f"),(6,"g"),(7,"h"),(8,"i"),(9,"j");
-handler t1 open;
-handler t1 read a first;
-handler t1 read a next;
-flush tables;
-handler t1 read a next;
-handler t1 read a next;
-flush tables with read lock;
-handler t1 read a next;
-unlock tables;
-drop table t1;
---error ER_UNKNOWN_TABLE
-handler t1 read a next;
-
-#
-# Bug#41110: crash with handler command when used concurrently with alter table
-# Bug#41112: crash in mysql_ha_close_table/get_lock_data with alter table
-#
-
---disable_warnings
-drop table if exists t1;
---enable_warnings
-create table t1 (a int);
-insert into t1 values (1);
-handler t1 open;
-connect(con1,localhost,root,,);
-send alter table t1 engine=memory;
-connection default;
-let $wait_condition=
-  select count(*) = 1 from information_schema.processlist
-  where state = "rename result table" and info = "alter table t1 engine=memory";
---source include/wait_condition.inc
---error ER_ILLEGAL_HA
-handler t1 read a next;
-handler t1 close;
-connection con1;
---reap
-drop table t1;
-disconnect con1;
---source include/wait_until_disconnected.inc
-connection default;
-
-#
-# Bug#44151 using handler commands on information_schema tables crashes server
-#
-USE information_schema;
---error ER_WRONG_USAGE
-HANDLER COLUMNS OPEN;
-USE test;
+--echo #
+--echo # BUG#51877 - HANDLER interface causes invalid memory read
+--echo #
+eval CREATE TABLE t1(a INT, KEY $key_type (a));
+HANDLER t1 OPEN;
+HANDLER t1 READ a FIRST;
+INSERT INTO t1 VALUES(1);
+--error 0,ER_CHECKREAD
+HANDLER t1 READ a NEXT;
+HANDLER t1 CLOSE;
+DROP TABLE t1;
diff --git a/mysql-test/suite/handler/init.inc b/mysql-test/suite/handler/init.inc
new file mode 100644
index 00000000000..32c6010f95b
--- /dev/null
+++ b/mysql-test/suite/handler/init.inc
@@ -0,0 +1,33 @@
+# Setup things for handler.inc
+#
+# Input variables
+#     $engine_type       -- storage engine to be tested
+#     $key_type          -- set if you want a non standard key type
+#
+# This scripts sets up default values for:
+#     $other_engine_type -- storage engine <> $engine_type
+#     $other_handler_engine_type -- storage engine <> $engine_type, if possible
+#                           1. $other_handler_engine_type must support handler
+#                           2. $other_handler_engine_type must point to an all
+#                              time available storage engine
+# have to be set before sourcing this script.
+#
+# Handler tests don't work with embedded server
+#
+-- source include/not_embedded.inc
+
+eval SET SESSION STORAGE_ENGINE = $engine_type;
+let $other_engine_type= CSV;
+let $other_handler_engine_type= MyISAM;
+
+--disable_warnings
+drop table if exists t1,t3,t4,t5;
+--enable_warnings
+
+# Create default test table
+
+eval create table t1 (a int, b char(10), key a $key_type (a), key b $key_type (a,b));
+insert into t1 values
+(17,"ddd"),(18,"eee"),(19,"fff"),(19,"yyy"),
+(14,"aaa"),(16,"ccc"),(16,"xxx"),
+(20,"ggg"),(21,"hhh"),(22,"iii");
diff --git a/mysql-test/r/handler_innodb.result b/mysql-test/suite/handler/innodb.result
index 957fc30acef..83ce270612d 100644
--- a/mysql-test/r/handler_innodb.result
+++ b/mysql-test/suite/handler/innodb.result
@@ -1,25 +1,23 @@
 SET SESSION STORAGE_ENGINE = InnoDB;
 drop table if exists t1,t3,t4,t5;
-create table t1 (a int, b char(10), key a(a), key b(a,b));
+create table t1 (a int, b char(10), key a  (a), key b  (a,b));
 insert into t1 values
 (17,"ddd"),(18,"eee"),(19,"fff"),(19,"yyy"),
-(14,"aaa"),(15,"bbb"),(16,"ccc"),(16,"xxx"),
+(14,"aaa"),(16,"ccc"),(16,"xxx"),
 (20,"ggg"),(21,"hhh"),(22,"iii");
 handler t1 open as t2;
-handler t2 read a=(SELECT 1);
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'SELECT 1)' at line 1
 handler t2 read a first;
 a	b
 14	aaa
 handler t2 read a next;
 a	b
-15	bbb
+16	ccc
 handler t2 read a next;
 a	b
-16	ccc
+16	xxx
 handler t2 read a prev;
 a	b
-15	bbb
+16	ccc
 handler t2 read a last;
 a	b
 22	iii
@@ -47,7 +45,6 @@ handler t2 read a next;
 a	b
 handler t2 read a=(15);
 a	b
-15	bbb
 handler t2 read a=(16);
 a	b
 16	ccc
@@ -84,26 +81,64 @@ a	b
 handler t2 read a<(18);
 a	b
 17	ddd
+handler t2 read a=(15);
+a	b
+handler t2 read a>=(15);
+a	b
+16	ccc
+handler t2 read a>(15);
+a	b
+16	ccc
+handler t2 read a<=(15);
+a	b
+14	aaa
+handler t2 read a<(15);
+a	b
+14	aaa
+handler t2 read a=(54);
+a	b
+handler t2 read a>=(54);
+a	b
+handler t2 read a>(54);
+a	b
+handler t2 read a<=(54);
+a	b
+22	iii
+handler t2 read a<(54);
+a	b
+22	iii
+handler t2 read a=(1);
+a	b
+handler t2 read a>=(1);
+a	b
+14	aaa
+handler t2 read a>(1);
+a	b
+14	aaa
+handler t2 read a<=(1);
+a	b
+handler t2 read a<(1);
+a	b
 handler t2 read a first limit 5;
 a	b
 14	aaa
-15	bbb
 16	ccc
 16	xxx
 17	ddd
+18	eee
 handler t2 read a next  limit 3;
 a	b
-18	eee
 19	fff
 19	yyy
+20	ggg
 handler t2 read a prev  limit 10;
 a	b
+19	yyy
 19	fff
 18	eee
 17	ddd
 16	xxx
 16	ccc
-15	bbb
 14	aaa
 handler t2 read a>=(16) limit 4;
 a	b
@@ -135,8 +170,6 @@ a	b
 handler t2 read next;
 a	b
 19	fff
-handler t2 read last;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
 handler t2 close;
 handler t1 open;
 handler t1 read a next;
@@ -144,7 +177,7 @@ a	b
 14	aaa
 handler t1 read a next;
 a	b
-15	bbb
+16	ccc
 handler t1 close;
 handler t1 open;
 handler t1 read a prev;
@@ -163,12 +196,12 @@ handler t2 read first;
 ERROR 42S02: Unknown table 't2' in HANDLER
 handler t1 open as t2;
 drop table t1;
-create table t1 (a int);
+create table t1 (a int not null);
 insert into t1 values (17);
 handler t2 read first;
 ERROR 42S02: Unknown table 't2' in HANDLER
 handler t1 open as t2;
-alter table t1 engine=MEMORY;
+alter table t1 engine=CSV;
 handler t2 read first;
 ERROR 42S02: Unknown table 't2' in HANDLER
 drop table t1;
@@ -191,7 +224,7 @@ handler t1 read first;
 a
 6
 drop table t1;
-create table t1(a int, index(a));
+create table t1(a int, index  (a));
 insert into t1 values (1), (2), (3);
 handler t1 open;
 handler t1 read a=(W);
@@ -217,7 +250,7 @@ Ok
 handler t close;
 use test;
 drop table t1;
-create table t1 ( a int, b int, INDEX a (a) );
+create table t1 ( a int, b int, INDEX a  (a) );
 insert into t1 values (1,2), (2,1);
 handler t1 open;
 handler t1 read a=(1) where b=2;
@@ -229,148 +262,6 @@ handler t1 read a=(1) where b=1;
 a	b
 handler t1 close;
 drop table t1;
-drop database if exists test_test;
-create database test_test;
-use test_test;
-create table t1(table_id char(20) primary key);
-insert into t1 values ('test_test.t1');
-insert into t1 values ('');
-handler t1 open;
-handler t1 read first limit 9;
-table_id
-
-test_test.t1
-create table t2(table_id char(20) primary key);
-insert into t2 values ('test_test.t2');
-insert into t2 values ('');
-handler t2 open;
-handler t2 read first limit 9;
-table_id
-
-test_test.t2
-use test;
-drop table if exists t1;
-create table t1(table_id char(20) primary key);
-insert into t1 values ('test.t1');
-insert into t1 values ('');
-handler t1 open;
-ERROR 42000: Not unique table/alias: 't1'
-use test;
-handler test.t1 read first limit 9;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read first limit 9' at line 1
-handler test_test.t1 read first limit 9;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read first limit 9' at line 1
-handler t1 read first limit 9;
-table_id
-
-test_test.t1
-handler test_test.t2 read first limit 9;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read first limit 9' at line 1
-handler t2 read first limit 9;
-table_id
-
-test_test.t2
-handler test_test.t1 close;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
-handler t1 close;
-drop table test_test.t1;
-handler test_test.t2 close;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
-handler t2 close;
-drop table test_test.t2;
-drop database test_test;
-use test;
-handler test.t1 close;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
-handler t1 close;
-ERROR 42S02: Unknown table 't1' in HANDLER
-drop table test.t1;
-drop database if exists test_test;
-drop table if exists t1;
-drop table if exists t2;
-drop table if exists t3;
-create database test_test;
-use test_test;
-create table t1 (c1 char(20));
-insert into t1 values ('test_test.t1');
-create table t3 (c1 char(20));
-insert into t3 values ('test_test.t3');
-handler t1 open;
-handler t1 read first limit 9;
-c1
-test_test.t1
-handler t1 open h1;
-handler h1 read first limit 9;
-c1
-test_test.t1
-use test;
-create table t1 (c1 char(20));
-create table t2 (c1 char(20));
-create table t3 (c1 char(20));
-insert into t1 values ('t1');
-insert into t2 values ('t2');
-insert into t3 values ('t3');
-handler t1 open;
-ERROR 42000: Not unique table/alias: 't1'
-handler t2 open t1;
-ERROR 42000: Not unique table/alias: 't1'
-handler t3 open t1;
-ERROR 42000: Not unique table/alias: 't1'
-handler t1 read first limit 9;
-c1
-test_test.t1
-handler test.t1 close;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
-handler test.t1 open h1;
-ERROR 42000: Not unique table/alias: 'h1'
-handler test_test.t1 open h1;
-ERROR 42000: Not unique table/alias: 'h1'
-handler test_test.t3 open h3;
-handler test.t1 open h2;
-handler t1 read first limit 9;
-c1
-test_test.t1
-handler h1 read first limit 9;
-c1
-test_test.t1
-handler h2 read first limit 9;
-c1
-t1
-handler h3 read first limit 9;
-c1
-test_test.t3
-handler h2 read first limit 9;
-c1
-t1
-handler test.h1 close;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
-handler t1 close;
-handler h1 close;
-handler h2 close;
-handler t1 read first limit 9;
-ERROR 42S02: Unknown table 't1' in HANDLER
-handler h1 read first limit 9;
-ERROR 42S02: Unknown table 'h1' in HANDLER
-handler h2 read first limit 9;
-ERROR 42S02: Unknown table 'h2' in HANDLER
-handler h3 read first limit 9;
-c1
-test_test.t3
-handler h3 read first limit 9;
-c1
-test_test.t3
-use test_test;
-handler h3 read first limit 9;
-c1
-test_test.t3
-handler test.h3 read first limit 9;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read first limit 9' at line 1
-handler h3 close;
-use test;
-drop table t3;
-drop table t2;
-drop table t1;
-drop database test_test;
 create table t1 (c1 char(20));
 insert into t1 values ("t1");
 handler t1 open as h1;
@@ -496,6 +387,11 @@ no1	no2
 HANDLER t1 READ `primary` PREV;
 no1	no2
 1	275
+HANDLER t1 READ `primary` = (1, 1000);
+no1	no2
+HANDLER t1 READ `primary` NEXT;
+no1	no2
+2	8
 DROP TABLE t1;
 create table t1 (c1 int);
 insert into t1 values (14397);
@@ -516,14 +412,12 @@ ERROR 42S02: Table 'test.t1' doesn't exist
 drop table if exists t1;
 Warnings:
 Note	1051	Unknown table 't1'
-drop table if exists t1;
-create table t1 (a int) ENGINE=MEMORY;
+create table t1 (a int not null) ENGINE=CSV;
 --> client 2
 handler t1 open;
 ERROR HY000: Table storage engine for 't1' doesn't have this option
 --> client 1
 drop table t1;
-drop table if exists t1;
 create table t1 (a int);
 handler t1 open as t1_alias;
 handler t1_alias read a next;
@@ -536,50 +430,9 @@ handler t1_alias READ a next where inexistent > 0;
 ERROR 42S22: Unknown column 'inexistent' in 'field list'
 handler t1_alias close;
 drop table t1;
-drop table if exists t1,t2;
-create table t1 (c1 int);
-create table t2 (c1 int);
-insert into t1 values (1);
-insert into t2 values (2);
-connection: default
-handler t1 open;
-handler t1 read first;
-c1
-1
-connection: flush
-flush tables;;
-connection: default
-handler t2 open;
-handler t2 read first;
-c1
-2
-handler t1 read next;
-c1
-1
-handler t1 close;
-handler t2 close;
-drop table t1,t2;
-drop table if exists t1,t2;
-create table t1 (c1 int);
-connection: default
-handler t1 open;
-handler t1 read first;
-c1
-connection: flush
-rename table t1 to t2;;
-connection: default
-handler t2 open;
-handler t2 read first;
-c1
-handler t1 read next;
-ERROR 42S02: Table 'test.t1' doesn't exist
-handler t1 close;
-handler t2 close;
-drop table t2;
-drop table if exists t1;
-create temporary table t1 (a int, b char(1), key a(a), key b(a,b));
+create temporary table t1 (a int, b char(1), key a  (a), key b(a,b));
 insert into t1 values (0,"a"),(1,"b"),(2,"c"),(3,"d"),(4,"e"),
-(5,"f"),(6,"g"),(7,"h"),(8,"i"),(9,"j");
+(5,"f"),(6,"g"),(7,"h"),(8,"i"),(9,"j"),(9,'k');
 select a,b from t1;
 a	b
 0	a
@@ -592,24 +445,25 @@ a	b
 7	h
 8	i
 9	j
+9	k
 handler t1 open as a1;
-handler a1 read a first;
-a	b
-0	a
-handler a1 read a next;
+handler a1 read a=(1);
 a	b
 1	b
 handler a1 read a next;
 a	b
 2	c
+handler a1 read a next;
+a	b
+3	d
 select a,b from t1;
 ERROR HY000: Can't reopen table: 'a1'
 handler a1 read a prev;
 a	b
-1	b
+2	c
 handler a1 read a prev;
 a	b
-0	a
+1	b
 handler a1 read a=(6) where b="g";
 a	b
 6	g
@@ -626,39 +480,28 @@ a	b
 7	h
 8	i
 9	j
+9	k
 handler t1 open as a2;
-handler a2 read a first;
+handler a2 read a=(9);
 a	b
-0	a
-handler a2 read a last;
+9	j
+handler a2 read a next;
+a	b
+9	k
+handler a2 read a prev limit 2;
 a	b
 9	j
+8	i
+handler a2 read a last;
+a	b
+9	k
 handler a2 read a prev;
 a	b
-8	i
+9	j
 handler a2 close;
 drop table t1;
-drop table if exists t1,t2;
 create table t1 (a int);
-handler t1 open as t1_alias;
-drop table t1;
-create table t1 (a int);
-handler t1 open as t1_alias;
-flush tables;
-drop table t1;
-create table t1 (a int);
-handler t1 open as t1_alias;
-handler t1_alias close;
-drop table t1;
-create table t1 (a int);
-handler t1 open as t1_alias;
-handler t1_alias read first;
-a
-drop table t1;
-handler t1_alias read next;
-ERROR 42S02: Unknown table 't1_alias' in HANDLER
-create table t1 (a int);
-create temporary table t2 (a int, key(a));
+create temporary table t2 (a int, key  (a));
 handler t1 open as a1;
 handler t2 open as a2;
 handler a2 read a first;
@@ -668,7 +511,7 @@ handler a2 read a next;
 ERROR 42S02: Unknown table 'a2' in HANDLER
 handler a1 close;
 ERROR 42S02: Unknown table 'a1' in HANDLER
-create table t1 (a int, key(a));
+create table t1 (a int, key  (a));
 create table t2 like t1;
 handler t1 open as a1;
 handler t2 open as a2;
@@ -681,7 +524,7 @@ handler a1 close;
 ERROR 42S02: Unknown table 'a1' in HANDLER
 handler a2 close;
 drop table t1, t2;
-create table t1 (a int, key(a));
+create table t1 (a int, key  (a));
 handler t1 open as a1;
 handler a1 read a first;
 a
@@ -689,7 +532,7 @@ rename table t1 to t2;
 handler a1 read a first;
 ERROR 42S02: Unknown table 'a1' in HANDLER
 drop table t2;
-create table t1 (a int, key(a));
+create table t1 (a int, key  (a));
 create table t2 like t1;
 handler t1 open as a1;
 handler t2 open as a2;
@@ -705,41 +548,15 @@ handler a1 close;
 ERROR 42S02: Unknown table 'a1' in HANDLER
 handler a2 close;
 drop table t1, t2;
-create table t1 (a int, b char(1), key a(a), key b(a,b));
-insert into t1 values (0,"a"),(1,"b"),(2,"c"),(3,"d"),(4,"e"),
-(5,"f"),(6,"g"),(7,"h"),(8,"i"),(9,"j");
-handler t1 open;
-handler t1 read a first;
-a	b
-0	a
-handler t1 read a next;
-a	b
-1	b
-flush tables;
-handler t1 read a next;
-a	b
-0	a
-handler t1 read a next;
-a	b
-1	b
-flush tables with read lock;
-handler t1 read a next;
-a	b
-0	a
-unlock tables;
-drop table t1;
-handler t1 read a next;
-ERROR 42S02: Unknown table 't1' in HANDLER
-drop table if exists t1;
-create table t1 (a int);
-insert into t1 values (1);
-handler t1 open;
-alter table t1 engine=memory;
-handler t1 read a next;
-ERROR HY000: Table storage engine for 't1' doesn't have this option
-handler t1 close;
-drop table t1;
-USE information_schema;
-HANDLER COLUMNS OPEN;
-ERROR HY000: Incorrect usage of HANDLER OPEN and information_schema
-USE test;
+#
+# BUG#51877 - HANDLER interface causes invalid memory read
+#
+CREATE TABLE t1(a INT, KEY  (a));
+HANDLER t1 OPEN;
+HANDLER t1 READ a FIRST;
+a
+INSERT INTO t1 VALUES(1);
+HANDLER t1 READ a NEXT;
+a
+HANDLER t1 CLOSE;
+DROP TABLE t1;
diff --git a/mysql-test/t/handler_innodb.test b/mysql-test/suite/handler/innodb.test
index 02982716f78..f4e4bf7cc3f 100644
--- a/mysql-test/t/handler_innodb.test
+++ b/mysql-test/suite/handler/innodb.test
@@ -5,16 +5,13 @@
 # Last update:
 # 2006-07-31 ML test refactored (MySQL 5.1)
 #               code of t/handler.test and t/innodb_handler.test united
-#               main testing code put into include/handler.inc
+#               main testing code put into handler.inc
 #               rename t/innodb_handler.test to t/handler_innodb.test
 #
 
-# should work in embedded server after mysqltest is fixed
---source include/not_embedded.inc
-
 --source include/have_innodb.inc
+
 let $engine_type= InnoDB;
-let $other_engine_type= MEMORY;
-let $other_handler_engine_type= MyISAM;
 
---source include/handler.inc
+--source init.inc
+--source handler.inc
diff --git a/mysql-test/suite/handler/interface.result b/mysql-test/suite/handler/interface.result
new file mode 100644
index 00000000000..0b5a4447739
--- /dev/null
+++ b/mysql-test/suite/handler/interface.result
@@ -0,0 +1,259 @@
+drop table if exists t1,t3,t4,t5;
+drop database if exists test_test;
+SET SESSION STORAGE_ENGINE = MyISAM;
+drop table if exists t1,t3,t4,t5;
+create table t1 (a int, b char(10), key a  (a), key b  (a,b));
+insert into t1 values
+(17,"ddd"),(18,"eee"),(19,"fff"),(19,"yyy"),
+(14,"aaa"),(16,"ccc"),(16,"xxx"),
+(20,"ggg"),(21,"hhh"),(22,"iii");
+handler t1 open;
+handler t1 read a=(SELECT 1);
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'SELECT 1)' at line 1
+handler t1 read a=(1) FIRST;
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'FIRST' at line 1
+handler t1 read a=(1) NEXT;
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'NEXT' at line 1
+handler t1 read last;
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
+handler t1 close;
+drop table t1;
+CREATE TABLE t1(a INT, PRIMARY KEY(a));
+insert into t1 values(1),(2);
+handler t1 open;
+handler t1 read primary=(1);
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'primary=(1)' at line 1
+handler t1 read `primary`=(1);
+a
+1
+handler t1 close;
+drop table t1;
+create database test_test;
+use test_test;
+create table t1(table_id char(20), primary key  (table_id));
+insert into t1 values ('test_test.t1');
+insert into t1 values ('');
+handler t1 open;
+handler t1 read first limit 9;
+table_id
+test_test.t1
+
+create table t2(table_id char(20), primary key  (table_id));
+insert into t2 values ('test_test.t2');
+insert into t2 values ('');
+handler t2 open;
+handler t2 read first limit 9;
+table_id
+test_test.t2
+
+use test;
+create table t1(table_id char(20), primary key  (table_id));
+insert into t1 values ('test.t1');
+insert into t1 values ('');
+handler t1 open;
+ERROR 42000: Not unique table/alias: 't1'
+use test;
+handler test.t1 read first limit 9;
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read first limit 9' at line 1
+handler test_test.t1 read first limit 9;
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read first limit 9' at line 1
+handler t1 read first limit 9;
+table_id
+test_test.t1
+
+handler test_test.t2 read first limit 9;
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read first limit 9' at line 1
+handler t2 read first limit 9;
+table_id
+test_test.t2
+
+handler test_test.t1 close;
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
+handler t1 close;
+drop table test_test.t1;
+handler test_test.t2 close;
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
+handler t2 close;
+drop table test_test.t2;
+drop database test_test;
+use test;
+handler test.t1 close;
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
+handler t1 close;
+ERROR 42S02: Unknown table 't1' in HANDLER
+drop table test.t1;
+create database test_test;
+use test_test;
+create table t1 (c1 char(20));
+insert into t1 values ('test_test.t1');
+create table t3 (c1 char(20));
+insert into t3 values ('test_test.t3');
+handler t1 open;
+handler t1 read first limit 9;
+c1
+test_test.t1
+handler t1 open h1;
+handler h1 read first limit 9;
+c1
+test_test.t1
+use test;
+create table t1 (c1 char(20));
+create table t2 (c1 char(20));
+create table t3 (c1 char(20));
+insert into t1 values ('t1');
+insert into t2 values ('t2');
+insert into t3 values ('t3');
+handler t1 open;
+ERROR 42000: Not unique table/alias: 't1'
+handler t2 open t1;
+ERROR 42000: Not unique table/alias: 't1'
+handler t3 open t1;
+ERROR 42000: Not unique table/alias: 't1'
+handler t1 read first limit 9;
+c1
+test_test.t1
+handler test.t1 close;
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
+handler test.t1 open h1;
+ERROR 42000: Not unique table/alias: 'h1'
+handler test_test.t1 open h1;
+ERROR 42000: Not unique table/alias: 'h1'
+handler test_test.t3 open h3;
+handler test.t1 open h2;
+handler t1 read first limit 9;
+c1
+test_test.t1
+handler h1 read first limit 9;
+c1
+test_test.t1
+handler h2 read first limit 9;
+c1
+t1
+handler h3 read first limit 9;
+c1
+test_test.t3
+handler h2 read first limit 9;
+c1
+t1
+handler test.h1 close;
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
+handler t1 close;
+handler h1 close;
+handler h2 close;
+handler t1 read first limit 9;
+ERROR 42S02: Unknown table 't1' in HANDLER
+handler h1 read first limit 9;
+ERROR 42S02: Unknown table 'h1' in HANDLER
+handler h2 read first limit 9;
+ERROR 42S02: Unknown table 'h2' in HANDLER
+handler h3 read first limit 9;
+c1
+test_test.t3
+handler h3 read first limit 9;
+c1
+test_test.t3
+use test_test;
+handler h3 read first limit 9;
+c1
+test_test.t3
+handler test.h3 read first limit 9;
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read first limit 9' at line 1
+handler h3 close;
+use test;
+drop table t3;
+drop table t2;
+drop table t1;
+drop database test_test;
+create table t1 (c1 int);
+create table t2 (c1 int);
+insert into t1 values (1);
+insert into t2 values (2);
+connection: default
+handler t1 open;
+handler t1 read first;
+c1
+1
+connection: flush
+flush tables;;
+connection: default
+handler t2 open;
+handler t2 read first;
+c1
+2
+handler t1 read next;
+c1
+1
+handler t1 close;
+handler t2 close;
+drop table t1,t2;
+create table t1 (a int);
+handler t1 open as t1_alias;
+drop table t1;
+create table t1 (a int);
+handler t1 open as t1_alias;
+flush tables;
+drop table t1;
+create table t1 (a int);
+handler t1 open as t1_alias;
+handler t1_alias close;
+drop table t1;
+create table t1 (a int);
+handler t1 open as t1_alias;
+handler t1_alias read first;
+a
+drop table t1;
+handler t1_alias read next;
+ERROR 42S02: Unknown table 't1_alias' in HANDLER
+create table t1 (c1 int);
+connection: default
+handler t1 open;
+handler t1 read first;
+c1
+connection: flush
+rename table t1 to t2;;
+connection: default
+handler t2 open;
+handler t2 read first;
+c1
+handler t1 read next;
+ERROR 42S02: Table 'test.t1' doesn't exist
+handler t1 close;
+handler t2 close;
+drop table t2;
+create table t1 (a int, b char(1), key a  (a), key b  (a,b));
+insert into t1 values (0,"a"),(1,"b"),(2,"c"),(3,"d"),(4,"e"),
+(5,"f"),(6,"g"),(7,"h"),(8,"i"),(9,"j");
+handler t1 open;
+handler t1 read a first;
+a	b
+0	a
+handler t1 read a next;
+a	b
+1	b
+flush tables;
+handler t1 read a next;
+a	b
+0	a
+handler t1 read a next;
+a	b
+1	b
+flush tables with read lock;
+handler t1 read a next;
+a	b
+0	a
+unlock tables;
+drop table t1;
+handler t1 read a next;
+ERROR 42S02: Unknown table 't1' in HANDLER
+drop table if exists t1;
+create table t1 (a int not null);
+insert into t1 values (1);
+handler t1 open;
+alter table t1 engine=csv;
+handler t1 read a next;
+ERROR HY000: Table storage engine for 't1' doesn't have this option
+handler t1 close;
+drop table t1;
+USE information_schema;
+HANDLER COLUMNS OPEN;
+ERROR HY000: Incorrect usage of HANDLER OPEN and information_schema
diff --git a/mysql-test/suite/handler/interface.test b/mysql-test/suite/handler/interface.test
new file mode 100644
index 00000000000..809f0228f98
--- /dev/null
+++ b/mysql-test/suite/handler/interface.test
@@ -0,0 +1,307 @@
+#
+# Tests of handler interface that are system independent
+#
+# Handler tests don't work yet with embedded server
+#
+-- source include/not_embedded.inc
+
+--disable_warnings
+drop table if exists t1,t3,t4,t5;
+drop database if exists test_test;
+--enable_warnings
+
+# Run tests with myisam (any engine should be ok)
+
+let $engine_type= MyISAM;
+
+--source init.inc
+
+#
+# Do some syntax checking
+#
+
+handler t1 open;
+--error ER_PARSE_ERROR
+handler t1 read a=(SELECT 1);
+--error ER_PARSE_ERROR
+handler t1 read a=(1) FIRST;
+--error ER_PARSE_ERROR
+handler t1 read a=(1) NEXT;
+--error ER_PARSE_ERROR
+handler t1 read last;
+handler t1 close;
+drop table t1;
+
+CREATE TABLE t1(a INT, PRIMARY KEY(a));
+insert into t1 values(1),(2);
+handler t1 open;
+--error ER_PARSE_ERROR
+handler t1 read primary=(1);
+handler t1 read `primary`=(1);
+handler t1 close;
+drop table t1;
+
+#
+# Check if two database names beginning the same are seen as different.
+#
+# This database begins like the usual 'test' database.
+#
+create database test_test;
+use test_test;
+eval create table t1(table_id char(20), primary key $key_type (table_id));
+insert into t1 values ('test_test.t1');
+insert into t1 values ('');
+handler t1 open;
+handler t1 read first limit 9;
+eval create table t2(table_id char(20), primary key $key_type (table_id));
+insert into t2 values ('test_test.t2');
+insert into t2 values ('');
+handler t2 open;
+handler t2 read first limit 9;
+#
+# This is the usual 'test' database.
+#
+use test;
+eval create table t1(table_id char(20), primary key $key_type (table_id));
+insert into t1 values ('test.t1');
+insert into t1 values ('');
+--error 1066
+handler t1 open;
+#
+# Check accessibility of all the tables.
+#
+use test;
+--error 1064
+handler test.t1 read first limit 9;
+--error 1064
+handler test_test.t1 read first limit 9;
+handler t1 read first limit 9;
+--error 1064
+handler test_test.t2 read first limit 9;
+handler t2 read first limit 9;
+
+#
+# Cleanup.
+#
+
+--error 1064
+handler test_test.t1 close;
+handler t1 close;
+drop table test_test.t1;
+--error 1064
+handler test_test.t2 close;
+handler t2 close;
+drop table test_test.t2;
+drop database test_test;
+
+#
+use test;
+--error 1064
+handler test.t1 close;
+--error 1109
+handler t1 close;
+drop table test.t1;
+
+#
+# BUG#4335 one name can be handler open'ed many times
+#
+
+create database test_test;
+use test_test;
+create table t1 (c1 char(20));
+insert into t1 values ('test_test.t1');
+create table t3 (c1 char(20));
+insert into t3 values ('test_test.t3');
+handler t1 open;
+handler t1 read first limit 9;
+handler t1 open h1;
+handler h1 read first limit 9;
+use test;
+create table t1 (c1 char(20));
+create table t2 (c1 char(20));
+create table t3 (c1 char(20));
+insert into t1 values ('t1');
+insert into t2 values ('t2');
+insert into t3 values ('t3');
+--error 1066
+handler t1 open;
+--error 1066
+handler t2 open t1;
+--error 1066
+handler t3 open t1;
+handler t1 read first limit 9;
+--error 1064
+handler test.t1 close;
+--error 1066
+handler test.t1 open h1;
+--error 1066
+handler test_test.t1 open h1;
+handler test_test.t3 open h3;
+handler test.t1 open h2;
+handler t1 read first limit 9;
+handler h1 read first limit 9;
+handler h2 read first limit 9;
+handler h3 read first limit 9;
+handler h2 read first limit 9;
+--error 1064
+handler test.h1 close;
+handler t1 close;
+handler h1 close;
+handler h2 close;
+--error 1109
+handler t1 read first limit 9;
+--error 1109
+handler h1 read first limit 9;
+--error 1109
+handler h2 read first limit 9;
+handler h3 read first limit 9;
+handler h3 read first limit 9;
+use test_test;
+handler h3 read first limit 9;
+--error 1064
+handler test.h3 read first limit 9;
+handler h3 close;
+use test;
+drop table t3;
+drop table t2;
+drop table t1;
+drop database test_test;
+
+#
+# Bug#21587 FLUSH TABLES causes server crash when used with HANDLER statements
+#
+
+create table t1 (c1 int);
+create table t2 (c1 int);
+insert into t1 values (1);
+insert into t2 values (2);
+--echo connection: default
+handler t1 open;
+handler t1 read first;
+connect (flush,localhost,root,,);
+connection flush;
+--echo connection: flush
+--send flush tables;
+connection default;
+--echo connection: default
+let $wait_condition=
+  select count(*) = 1 from information_schema.processlist
+  where state = "Flushing tables";
+--source include/wait_condition.inc
+handler t2 open;
+handler t2 read first;
+handler t1 read next;
+handler t1 close;
+handler t2 close;
+connection flush;
+reap;
+connection default;
+drop table t1,t2;
+disconnect flush;
+
+#
+# Bug#31397 Inconsistent drop table behavior of handler tables.
+#
+
+create table t1 (a int);
+handler t1 open as t1_alias;
+drop table t1;
+create table t1 (a int);
+handler t1 open as t1_alias;
+flush tables;
+drop table t1;
+create table t1 (a int);
+handler t1 open as t1_alias;
+handler t1_alias close;
+drop table t1;
+create table t1 (a int);
+handler t1 open as t1_alias;
+handler t1_alias read first;
+drop table t1;
+--error ER_UNKNOWN_TABLE
+handler t1_alias read next;
+
+#
+# Bug#31409 RENAME TABLE causes server crash or deadlock when used with
+# HANDLER statements
+#
+
+create table t1 (c1 int);
+--echo connection: default
+handler t1 open;
+handler t1 read first;
+connect (flush,localhost,root,,);
+connection flush;
+--echo connection: flush
+--send rename table t1 to t2;
+connection default;
+--echo connection: default
+let $wait_condition=
+  select count(*) = 1 from information_schema.processlist
+  where state = "Waiting for table" and info = "rename table t1 to t2";
+--source include/wait_condition.inc
+handler t2 open;
+handler t2 read first;
+--error ER_NO_SUCH_TABLE
+handler t1 read next;
+handler t1 close;
+handler t2 close;
+connection flush;
+reap;
+connection default;
+drop table t2;
+disconnect flush;
+
+# Flush tables causes handlers reopen
+
+eval create table t1 (a int, b char(1), key a $key_type (a), key b $key_type (a,b));
+insert into t1 values (0,"a"),(1,"b"),(2,"c"),(3,"d"),(4,"e"),
+                      (5,"f"),(6,"g"),(7,"h"),(8,"i"),(9,"j");
+handler t1 open;
+handler t1 read a first;
+handler t1 read a next;
+flush tables;
+handler t1 read a next;
+handler t1 read a next;
+flush tables with read lock;
+handler t1 read a next;
+unlock tables;
+drop table t1;
+--error ER_UNKNOWN_TABLE
+handler t1 read a next;
+
+#
+# Bug#41110: crash with handler command when used concurrently with alter table
+# Bug#41112: crash in mysql_ha_close_table/get_lock_data with alter table
+#
+
+--disable_warnings
+drop table if exists t1;
+--enable_warnings
+create table t1 (a int not null);
+insert into t1 values (1);
+handler t1 open;
+connect(con1,localhost,root,,);
+send alter table t1 engine=csv;
+connection default;
+let $wait_condition=
+  select count(*) = 1 from information_schema.processlist
+  where state = "rename result table" and info = "alter table t1 engine=csv";
+--source include/wait_condition.inc
+--error ER_ILLEGAL_HA
+handler t1 read a next;
+handler t1 close;
+connection con1;
+--reap
+drop table t1;
+disconnect con1;
+--source include/wait_until_disconnected.inc
+connection default;
+
+#
+# Bug#44151 using handler commands on information_schema tables crashes server
+#
+
+USE information_schema;
+--error ER_WRONG_USAGE
+HANDLER COLUMNS OPEN;
diff --git a/mysql-test/r/handler_myisam.result b/mysql-test/suite/handler/myisam.result
index b20b8dbb138..bd356d6e81d 100644
--- a/mysql-test/r/handler_myisam.result
+++ b/mysql-test/suite/handler/myisam.result
@@ -1,25 +1,23 @@
 SET SESSION STORAGE_ENGINE = MyISAM;
 drop table if exists t1,t3,t4,t5;
-create table t1 (a int, b char(10), key a(a), key b(a,b));
+create table t1 (a int, b char(10), key a  (a), key b  (a,b));
 insert into t1 values
 (17,"ddd"),(18,"eee"),(19,"fff"),(19,"yyy"),
-(14,"aaa"),(15,"bbb"),(16,"ccc"),(16,"xxx"),
+(14,"aaa"),(16,"ccc"),(16,"xxx"),
 (20,"ggg"),(21,"hhh"),(22,"iii");
 handler t1 open as t2;
-handler t2 read a=(SELECT 1);
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'SELECT 1)' at line 1
 handler t2 read a first;
 a	b
 14	aaa
 handler t2 read a next;
 a	b
-15	bbb
+16	ccc
 handler t2 read a next;
 a	b
-16	ccc
+16	xxx
 handler t2 read a prev;
 a	b
-15	bbb
+16	ccc
 handler t2 read a last;
 a	b
 22	iii
@@ -47,7 +45,6 @@ handler t2 read a next;
 a	b
 handler t2 read a=(15);
 a	b
-15	bbb
 handler t2 read a=(16);
 a	b
 16	ccc
@@ -84,26 +81,64 @@ a	b
 handler t2 read a<(18);
 a	b
 17	ddd
+handler t2 read a=(15);
+a	b
+handler t2 read a>=(15);
+a	b
+16	ccc
+handler t2 read a>(15);
+a	b
+16	ccc
+handler t2 read a<=(15);
+a	b
+14	aaa
+handler t2 read a<(15);
+a	b
+14	aaa
+handler t2 read a=(54);
+a	b
+handler t2 read a>=(54);
+a	b
+handler t2 read a>(54);
+a	b
+handler t2 read a<=(54);
+a	b
+22	iii
+handler t2 read a<(54);
+a	b
+22	iii
+handler t2 read a=(1);
+a	b
+handler t2 read a>=(1);
+a	b
+14	aaa
+handler t2 read a>(1);
+a	b
+14	aaa
+handler t2 read a<=(1);
+a	b
+handler t2 read a<(1);
+a	b
 handler t2 read a first limit 5;
 a	b
 14	aaa
-15	bbb
 16	ccc
 16	xxx
 17	ddd
+18	eee
 handler t2 read a next  limit 3;
 a	b
-18	eee
 19	fff
 19	yyy
+20	ggg
 handler t2 read a prev  limit 10;
 a	b
+19	yyy
 19	fff
 18	eee
 17	ddd
 16	xxx
 16	ccc
-15	bbb
 14	aaa
 handler t2 read a>=(16) limit 4;
 a	b
@@ -135,8 +170,6 @@ a	b
 handler t2 read next;
 a	b
 19	fff
-handler t2 read last;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
 handler t2 close;
 handler t1 open;
 handler t1 read a next;
@@ -144,7 +177,7 @@ a	b
 14	aaa
 handler t1 read a next;
 a	b
-15	bbb
+16	ccc
 handler t1 close;
 handler t1 open;
 handler t1 read a prev;
@@ -163,12 +196,12 @@ handler t2 read first;
 ERROR 42S02: Unknown table 't2' in HANDLER
 handler t1 open as t2;
 drop table t1;
-create table t1 (a int);
+create table t1 (a int not null);
 insert into t1 values (17);
 handler t2 read first;
 ERROR 42S02: Unknown table 't2' in HANDLER
 handler t1 open as t2;
-alter table t1 engine=MEMORY;
+alter table t1 engine=CSV;
 handler t2 read first;
 ERROR 42S02: Unknown table 't2' in HANDLER
 drop table t1;
@@ -191,7 +224,7 @@ handler t1 read first;
 a
 6
 drop table t1;
-create table t1(a int, index(a));
+create table t1(a int, index  (a));
 insert into t1 values (1), (2), (3);
 handler t1 open;
 handler t1 read a=(W);
@@ -217,7 +250,7 @@ Ok
 handler t close;
 use test;
 drop table t1;
-create table t1 ( a int, b int, INDEX a (a) );
+create table t1 ( a int, b int, INDEX a  (a) );
 insert into t1 values (1,2), (2,1);
 handler t1 open;
 handler t1 read a=(1) where b=2;
@@ -229,148 +262,6 @@ handler t1 read a=(1) where b=1;
 a	b
 handler t1 close;
 drop table t1;
-drop database if exists test_test;
-create database test_test;
-use test_test;
-create table t1(table_id char(20) primary key);
-insert into t1 values ('test_test.t1');
-insert into t1 values ('');
-handler t1 open;
-handler t1 read first limit 9;
-table_id
-test_test.t1
-
-create table t2(table_id char(20) primary key);
-insert into t2 values ('test_test.t2');
-insert into t2 values ('');
-handler t2 open;
-handler t2 read first limit 9;
-table_id
-test_test.t2
-
-use test;
-drop table if exists t1;
-create table t1(table_id char(20) primary key);
-insert into t1 values ('test.t1');
-insert into t1 values ('');
-handler t1 open;
-ERROR 42000: Not unique table/alias: 't1'
-use test;
-handler test.t1 read first limit 9;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read first limit 9' at line 1
-handler test_test.t1 read first limit 9;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read first limit 9' at line 1
-handler t1 read first limit 9;
-table_id
-test_test.t1
-
-handler test_test.t2 read first limit 9;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read first limit 9' at line 1
-handler t2 read first limit 9;
-table_id
-test_test.t2
-
-handler test_test.t1 close;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
-handler t1 close;
-drop table test_test.t1;
-handler test_test.t2 close;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
-handler t2 close;
-drop table test_test.t2;
-drop database test_test;
-use test;
-handler test.t1 close;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
-handler t1 close;
-ERROR 42S02: Unknown table 't1' in HANDLER
-drop table test.t1;
-drop database if exists test_test;
-drop table if exists t1;
-drop table if exists t2;
-drop table if exists t3;
-create database test_test;
-use test_test;
-create table t1 (c1 char(20));
-insert into t1 values ('test_test.t1');
-create table t3 (c1 char(20));
-insert into t3 values ('test_test.t3');
-handler t1 open;
-handler t1 read first limit 9;
-c1
-test_test.t1
-handler t1 open h1;
-handler h1 read first limit 9;
-c1
-test_test.t1
-use test;
-create table t1 (c1 char(20));
-create table t2 (c1 char(20));
-create table t3 (c1 char(20));
-insert into t1 values ('t1');
-insert into t2 values ('t2');
-insert into t3 values ('t3');
-handler t1 open;
-ERROR 42000: Not unique table/alias: 't1'
-handler t2 open t1;
-ERROR 42000: Not unique table/alias: 't1'
-handler t3 open t1;
-ERROR 42000: Not unique table/alias: 't1'
-handler t1 read first limit 9;
-c1
-test_test.t1
-handler test.t1 close;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
-handler test.t1 open h1;
-ERROR 42000: Not unique table/alias: 'h1'
-handler test_test.t1 open h1;
-ERROR 42000: Not unique table/alias: 'h1'
-handler test_test.t3 open h3;
-handler test.t1 open h2;
-handler t1 read first limit 9;
-c1
-test_test.t1
-handler h1 read first limit 9;
-c1
-test_test.t1
-handler h2 read first limit 9;
-c1
-t1
-handler h3 read first limit 9;
-c1
-test_test.t3
-handler h2 read first limit 9;
-c1
-t1
-handler test.h1 close;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'close' at line 1
-handler t1 close;
-handler h1 close;
-handler h2 close;
-handler t1 read first limit 9;
-ERROR 42S02: Unknown table 't1' in HANDLER
-handler h1 read first limit 9;
-ERROR 42S02: Unknown table 'h1' in HANDLER
-handler h2 read first limit 9;
-ERROR 42S02: Unknown table 'h2' in HANDLER
-handler h3 read first limit 9;
-c1
-test_test.t3
-handler h3 read first limit 9;
-c1
-test_test.t3
-use test_test;
-handler h3 read first limit 9;
-c1
-test_test.t3
-handler test.h3 read first limit 9;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'read first limit 9' at line 1
-handler h3 close;
-use test;
-drop table t3;
-drop table t2;
-drop table t1;
-drop database test_test;
 create table t1 (c1 char(20));
 insert into t1 values ("t1");
 handler t1 open as h1;
@@ -495,6 +386,11 @@ no1	no2
 HANDLER t1 READ `primary` PREV;
 no1	no2
 1	275
+HANDLER t1 READ `primary` = (1, 1000);
+no1	no2
+HANDLER t1 READ `primary` NEXT;
+no1	no2
+2	6
 DROP TABLE t1;
 create table t1 (c1 int);
 insert into t1 values (14397);
@@ -515,14 +411,12 @@ ERROR 42S02: Table 'test.t1' doesn't exist
 drop table if exists t1;
 Warnings:
 Note	1051	Unknown table 't1'
-drop table if exists t1;
-create table t1 (a int) ENGINE=MEMORY;
+create table t1 (a int not null) ENGINE=CSV;
 --> client 2
 handler t1 open;
 ERROR HY000: Table storage engine for 't1' doesn't have this option
 --> client 1
 drop table t1;
-drop table if exists t1;
 create table t1 (a int);
 handler t1 open as t1_alias;
 handler t1_alias read a next;
@@ -535,50 +429,9 @@ handler t1_alias READ a next where inexistent > 0;
 ERROR 42S22: Unknown column 'inexistent' in 'field list'
 handler t1_alias close;
 drop table t1;
-drop table if exists t1,t2;
-create table t1 (c1 int);
-create table t2 (c1 int);
-insert into t1 values (1);
-insert into t2 values (2);
-connection: default
-handler t1 open;
-handler t1 read first;
-c1
-1
-connection: flush
-flush tables;;
-connection: default
-handler t2 open;
-handler t2 read first;
-c1
-2
-handler t1 read next;
-c1
-1
-handler t1 close;
-handler t2 close;
-drop table t1,t2;
-drop table if exists t1,t2;
-create table t1 (c1 int);
-connection: default
-handler t1 open;
-handler t1 read first;
-c1
-connection: flush
-rename table t1 to t2;;
-connection: default
-handler t2 open;
-handler t2 read first;
-c1
-handler t1 read next;
-ERROR 42S02: Table 'test.t1' doesn't exist
-handler t1 close;
-handler t2 close;
-drop table t2;
-drop table if exists t1;
-create temporary table t1 (a int, b char(1), key a(a), key b(a,b));
+create temporary table t1 (a int, b char(1), key a  (a), key b(a,b));
 insert into t1 values (0,"a"),(1,"b"),(2,"c"),(3,"d"),(4,"e"),
-(5,"f"),(6,"g"),(7,"h"),(8,"i"),(9,"j");
+(5,"f"),(6,"g"),(7,"h"),(8,"i"),(9,"j"),(9,'k');
 select a,b from t1;
 a	b
 0	a
@@ -591,24 +444,25 @@ a	b
 7	h
 8	i
 9	j
+9	k
 handler t1 open as a1;
-handler a1 read a first;
-a	b
-0	a
-handler a1 read a next;
+handler a1 read a=(1);
 a	b
 1	b
 handler a1 read a next;
 a	b
 2	c
+handler a1 read a next;
+a	b
+3	d
 select a,b from t1;
 ERROR HY000: Can't reopen table: 'a1'
 handler a1 read a prev;
 a	b
-1	b
+2	c
 handler a1 read a prev;
 a	b
-0	a
+1	b
 handler a1 read a=(6) where b="g";
 a	b
 6	g
@@ -625,39 +479,28 @@ a	b
 7	h
 8	i
 9	j
+9	k
 handler t1 open as a2;
-handler a2 read a first;
+handler a2 read a=(9);
 a	b
-0	a
-handler a2 read a last;
+9	j
+handler a2 read a next;
+a	b
+9	k
+handler a2 read a prev limit 2;
 a	b
 9	j
+8	i
+handler a2 read a last;
+a	b
+9	k
 handler a2 read a prev;
 a	b
-8	i
+9	j
 handler a2 close;
 drop table t1;
-drop table if exists t1,t2;
-create table t1 (a int);
-handler t1 open as t1_alias;
-drop table t1;
-create table t1 (a int);
-handler t1 open as t1_alias;
-flush tables;
-drop table t1;
-create table t1 (a int);
-handler t1 open as t1_alias;
-handler t1_alias close;
-drop table t1;
-create table t1 (a int);
-handler t1 open as t1_alias;
-handler t1_alias read first;
-a
-drop table t1;
-handler t1_alias read next;
-ERROR 42S02: Unknown table 't1_alias' in HANDLER
 create table t1 (a int);
-create temporary table t2 (a int, key(a));
+create temporary table t2 (a int, key  (a));
 handler t1 open as a1;
 handler t2 open as a2;
 handler a2 read a first;
@@ -667,7 +510,7 @@ handler a2 read a next;
 ERROR 42S02: Unknown table 'a2' in HANDLER
 handler a1 close;
 ERROR 42S02: Unknown table 'a1' in HANDLER
-create table t1 (a int, key(a));
+create table t1 (a int, key  (a));
 create table t2 like t1;
 handler t1 open as a1;
 handler t2 open as a2;
@@ -680,7 +523,7 @@ handler a1 close;
 ERROR 42S02: Unknown table 'a1' in HANDLER
 handler a2 close;
 drop table t1, t2;
-create table t1 (a int, key(a));
+create table t1 (a int, key  (a));
 handler t1 open as a1;
 handler a1 read a first;
 a
@@ -688,7 +531,7 @@ rename table t1 to t2;
 handler a1 read a first;
 ERROR 42S02: Unknown table 'a1' in HANDLER
 drop table t2;
-create table t1 (a int, key(a));
+create table t1 (a int, key  (a));
 create table t2 like t1;
 handler t1 open as a1;
 handler t2 open as a2;
@@ -703,44 +546,19 @@ handler a1 close;
 ERROR 42S02: Unknown table 'a1' in HANDLER
 handler a2 close;
 drop table t1, t2;
-create table t1 (a int, b char(1), key a(a), key b(a,b));
-insert into t1 values (0,"a"),(1,"b"),(2,"c"),(3,"d"),(4,"e"),
-(5,"f"),(6,"g"),(7,"h"),(8,"i"),(9,"j");
-handler t1 open;
-handler t1 read a first;
-a	b
-0	a
-handler t1 read a next;
-a	b
-1	b
-flush tables;
-handler t1 read a next;
-a	b
-0	a
-handler t1 read a next;
-a	b
-1	b
-flush tables with read lock;
-handler t1 read a next;
-a	b
-0	a
-unlock tables;
-drop table t1;
-handler t1 read a next;
-ERROR 42S02: Unknown table 't1' in HANDLER
-drop table if exists t1;
-create table t1 (a int);
-insert into t1 values (1);
-handler t1 open;
-alter table t1 engine=memory;
-handler t1 read a next;
-ERROR HY000: Table storage engine for 't1' doesn't have this option
-handler t1 close;
-drop table t1;
-USE information_schema;
-HANDLER COLUMNS OPEN;
-ERROR HY000: Incorrect usage of HANDLER OPEN and information_schema
-USE test;
+#
+# BUG#51877 - HANDLER interface causes invalid memory read
+#
+CREATE TABLE t1(a INT, KEY  (a));
+HANDLER t1 OPEN;
+HANDLER t1 READ a FIRST;
+a
+INSERT INTO t1 VALUES(1);
+HANDLER t1 READ a NEXT;
+a
+1
+HANDLER t1 CLOSE;
+DROP TABLE t1;
 #
 # BUG #46456: HANDLER OPEN + TRUNCATE + DROP (temporary) TABLE, crash 
 #
@@ -757,19 +575,6 @@ HANDLER t1 READ FIRST;
 ERROR 42S02: Unknown table 't1' in HANDLER
 DROP TABLE t1;
 #
-# BUG#51877 - HANDLER interface causes invalid memory read
-#
-CREATE TABLE t1(a INT, KEY(a));
-HANDLER t1 OPEN;
-HANDLER t1 READ a FIRST;
-a
-INSERT INTO t1 VALUES(1);
-HANDLER t1 READ a NEXT;
-a
-1
-HANDLER t1 CLOSE;
-DROP TABLE t1;
-#
 # Bug #54007: assert in ha_myisam::index_next , HANDLER
 #
 CREATE TABLE t1(a INT, b INT, PRIMARY KEY(a), KEY b(b), KEY ab(a, b));
@@ -821,12 +626,13 @@ HANDLER t1 READ b NEXT;
 a	b
 HANDLER t1 READ NEXT;
 a	b
-4	40
+2	20
 HANDLER t1 READ NEXT;
 a	b
-3	30
+1	10
 HANDLER t1 READ NEXT;
 a	b
+4	40
 HANDLER t1 CLOSE;
 HANDLER t1 OPEN;
 HANDLER t1 READ FIRST;
diff --git a/mysql-test/t/handler_myisam.test b/mysql-test/suite/handler/myisam.test
index e78072ef8a0..c6acf1e822c 100644
--- a/mysql-test/t/handler_myisam.test
+++ b/mysql-test/suite/handler/myisam.test
@@ -5,20 +5,14 @@
 # Last update:
 # 2006-07-31 ML test refactored (MySQL 5.1)
 #               code of t/handler.test and t/innodb_handler.test united
-#               main testing code put into include/handler.inc
+#               main testing code put into handler.inc
 #               rename t/handler.test to t/handler_myisam.test
 #
 
-# should work in embedded server after mysqltest is fixed
---source include/not_embedded.inc
-
 let $engine_type= MyISAM;
-let $other_engine_type= MEMORY;
-# There is unfortunately no other all time available storage engine
-# which supports the handler interface
-let $other_handler_engine_type= MyISAM;
 
---source include/handler.inc
+--source init.inc
+--source handler.inc
 
 --echo #
 --echo # BUG #46456: HANDLER OPEN + TRUNCATE + DROP (temporary) TABLE, crash 
@@ -38,18 +32,6 @@ HANDLER t1 READ FIRST;
 DROP TABLE t1;
 
 --echo #
---echo # BUG#51877 - HANDLER interface causes invalid memory read
---echo #
-CREATE TABLE t1(a INT, KEY(a));
-HANDLER t1 OPEN;
-HANDLER t1 READ a FIRST;
-INSERT INTO t1 VALUES(1);
-HANDLER t1 READ a NEXT;
-HANDLER t1 CLOSE;
-DROP TABLE t1;
-
-
---echo #
 --echo # Bug #54007: assert in ha_myisam::index_next , HANDLER
 --echo #
 CREATE TABLE t1(a INT, b INT, PRIMARY KEY(a), KEY b(b), KEY ab(a, b));
diff --git a/mysql-test/t/lock_multi.test b/mysql-test/t/lock_multi.test
index 4df1a0f3478..742a83f7bad 100644
--- a/mysql-test/t/lock_multi.test
+++ b/mysql-test/t/lock_multi.test
@@ -484,22 +484,6 @@ unlock tables;
 connection default;
 drop table t1;
 
-#
-# Bug#25856 HANDLER table OPEN in one connection lock DROP TABLE in another one
-#
---disable_warnings
-drop table if exists t1;
---enable_warnings
-create table t1 (a int) ENGINE=MEMORY;
---echo --> client 2
-connection locker;
---error ER_ILLEGAL_HA
-handler t1 open;
---echo --> client 1
-connection default;
-drop table t1;
-
-
 # Disconnect sessions used in many subtests above
 disconnect locker;
 disconnect reader;
diff --git a/mysys/tree.c b/mysys/tree.c
index e4854581204..68eaecbb27b 100644
--- a/mysys/tree.c
+++ b/mysys/tree.c
@@ -375,6 +375,7 @@ void *tree_search_key(TREE *tree, const void *key,
       case HA_READ_KEY_EXACT:
       case HA_READ_KEY_OR_NEXT:
       case HA_READ_BEFORE_KEY:
+      case HA_READ_KEY_OR_PREV:
 	last_equal_element= parents;
 	cmp= 1;
 	break;
@@ -418,6 +419,9 @@ void *tree_search_key(TREE *tree, const void *key,
   case HA_READ_BEFORE_KEY:
     *last_pos= last_right_step_parent;
     break;
+  case HA_READ_KEY_OR_PREV:
+    *last_pos= last_equal_element ? last_equal_element : last_right_step_parent;
+    break;
   default:
     return NULL;
   }
diff --git a/sql/handler.cc b/sql/handler.cc
index e851d9248c2..e1808e8d460 100644
--- a/sql/handler.cc
+++ b/sql/handler.cc
@@ -2736,7 +2736,10 @@ void handler::print_error(int error, myf errflag)
     textno=ER_DUP_UNIQUE;
     break;
   case HA_ERR_RECORD_CHANGED:
-    SET_FATAL_ERROR;
+    /*
+      This is not fatal error when using HANDLER interface
+      SET_FATAL_ERROR;
+    */
     textno=ER_CHECKREAD;
     break;
   case HA_ERR_CRASHED:
diff --git a/sql/handler.h b/sql/handler.h
index 7e39ead5029..b7bc188b2ad 100644
--- a/sql/handler.h
+++ b/sql/handler.h
@@ -1753,6 +1753,7 @@ public:
   { return(NULL);}  /* gets tablespace name from handler */
   /** used in ALTER TABLE; 1 if changing storage engine is allowed */
   virtual bool can_switch_engines() { return 1; }
+  virtual int can_continue_handler_scan() { return 0; }
   /** used in REPLACE; is > 0 if table is referred by a FOREIGN KEY */
   virtual int get_foreign_key_list(THD *thd, List<FOREIGN_KEY_INFO> *f_key_list)
   { return 0; }
diff --git a/sql/sql_handler.cc b/sql/sql_handler.cc
index 69be8c8e9b4..85b7e46a313 100644
--- a/sql/sql_handler.cc
+++ b/sql/sql_handler.cc
@@ -548,6 +548,12 @@ retry:
         mode= RLAST;
     }
   }
+  else if (table->file->inited != handler::RND)
+  {
+    /* Convert RNEXT to RFIRST if we haven't started row scan */
+    if (mode == RNEXT)
+      mode= RFIRST;
+  }
 
   if (insert_fields(thd, &thd->lex->select_lex.context,
                     tables->db, tables->alias, &it, 0))
@@ -569,6 +575,8 @@ retry:
     case RNEXT:
       if (table->file->inited != handler::NONE)
       {
+        if ((error= table->file->can_continue_handler_scan()))
+          break;
         if (keyname)
         {
           /* Check if we read from the same index. */
@@ -603,7 +611,9 @@ retry:
       DBUG_ASSERT((uint) keyno == table->file->get_index());
       if (table->file->inited != handler::NONE)
       {
-        error=table->file->ha_index_prev(table->record[0]);
+        if ((error= table->file->can_continue_handler_scan()))
+          break;
+        error= table->file->ha_index_prev(table->record[0]);
         break;
       }
       /* else fall through */
@@ -673,8 +683,11 @@ retry:
         continue;
       if (error != HA_ERR_KEY_NOT_FOUND && error != HA_ERR_END_OF_FILE)
       {
-        sql_print_error("mysql_ha_read: Got error %d when reading table '%s'",
-                        error, tables->table_name);
+        /* Don't give error in the log file for some expected problems */
+        if (error != HA_ERR_RECORD_CHANGED && error != HA_ERR_WRONG_COMMAND)
+          sql_print_error("mysql_ha_read: Got error %d when reading "
+                          "table '%s'",
+                          error, tables->table_name);
         table->file->print_error(error,MYF(0));
         goto err;
       }
diff --git a/storage/maria/ma_extra.c b/storage/maria/ma_extra.c
index 81f3789523f..e436a51248a 100644
--- a/storage/maria/ma_extra.c
+++ b/storage/maria/ma_extra.c
@@ -50,7 +50,7 @@ int maria_extra(MARIA_HA *info, enum ha_extra_function function,
 
   switch (function) {
   case HA_EXTRA_RESET_STATE:		/* Reset state (don't free buffers) */
-    info->lastinx= 0;			/* Use first index as def */
+    info->lastinx= ~0;			/* Detect index changes */
     info->last_search_keypage= info->cur_row.lastpos= HA_OFFSET_ERROR;
     info->page_changed= 1;
 					/* Next/prev gives first/last */
@@ -545,7 +545,7 @@ int maria_reset(MARIA_HA *info)
 #endif
   info->opt_flag&= ~(KEY_READ_USED | REMEMBER_OLD_POS);
   info->quick_mode= 0;
-  info->lastinx= 0;			/* Use first index as def */
+  info->lastinx= ~0;			/* detect index changes */
   info->last_search_keypage= info->cur_row.lastpos= HA_OFFSET_ERROR;
   info->page_changed= 1;
   info->update= ((info->update & HA_STATE_CHANGED) | HA_STATE_NEXT_FOUND |
diff --git a/storage/maria/ma_ft_boolean_search.c b/storage/maria/ma_ft_boolean_search.c
index d302892ce05..40b0623adb1 100644
--- a/storage/maria/ma_ft_boolean_search.c
+++ b/storage/maria/ma_ft_boolean_search.c
@@ -356,7 +356,7 @@ static int _ft2_search(FTB *ftb, FTB_WORD *ftbw, my_bool init_search)
   {
     ftbw->key_root=info->s->state.key_root[ftb->keynr];
     ftbw->keyinfo=info->s->keyinfo+ftb->keynr;
-    key.keyinfo= ftbw->keyinfo;
+    info->last_key.keyinfo= key.keyinfo= ftbw->keyinfo;
     key.data= ftbw->word;
     key.data_length= ftbw->len;
     key.ref_length= 0;
@@ -380,7 +380,7 @@ static int _ft2_search(FTB *ftb, FTB_WORD *ftbw, my_bool init_search)
                    max_docid);
     }
 
-    key.keyinfo= ftbw->keyinfo;
+    info->last_key.keyinfo= key.keyinfo= ftbw->keyinfo;
     key.data= lastkey_buf;
     key.data_length= USE_WHOLE_KEY;
     key.ref_length= 0;
diff --git a/storage/maria/ma_open.c b/storage/maria/ma_open.c
index 63e1801a39a..0890ff7e000 100644
--- a/storage/maria/ma_open.c
+++ b/storage/maria/ma_open.c
@@ -130,6 +130,8 @@ static MARIA_HA *maria_clone_internal(MARIA_SHARE *share, const char *name,
 
   info.s=share;
   info.cur_row.lastpos= HA_OFFSET_ERROR;
+  /* Impossible first index to force initialization in _ma_check_index() */
+  info.lastinx= ~0;
   info.update= (short) (HA_STATE_NEXT_FOUND+HA_STATE_PREV_FOUND);
   info.opt_flag=READ_CHECK_USED;
   info.this_unique= (ulong) info.dfile.file; /* Uniq number in process */
diff --git a/storage/maria/ma_rkey.c b/storage/maria/ma_rkey.c
index daf1fd5a60c..85b3b463f49 100644
--- a/storage/maria/ma_rkey.c
+++ b/storage/maria/ma_rkey.c
@@ -43,7 +43,7 @@ int maria_rkey(MARIA_HA *info, uchar *buf, int inx, const uchar *key_data,
 
   info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED);
   info->last_key_func= search_flag;
-  keyinfo= share->keyinfo + inx;
+  keyinfo= info->last_key.keyinfo;
 
   key_buff= info->lastkey_buff+info->s->base.max_key_length;
 
diff --git a/storage/maria/ma_rnext.c b/storage/maria/ma_rnext.c
index be960eccfe0..c49bbb19e83 100644
--- a/storage/maria/ma_rnext.c
+++ b/storage/maria/ma_rnext.c
@@ -30,6 +30,7 @@ int maria_rnext(MARIA_HA *info, uchar *buf, int inx)
   uint flag;
   MARIA_SHARE *share= info->s;
   MARIA_KEYDEF *keyinfo;
+  uint update_mask= HA_STATE_NEXT_FOUND;
   DBUG_ENTER("maria_rnext");
 
   if ((inx = _ma_check_index(info,inx)) < 0)
@@ -61,6 +62,20 @@ int maria_rnext(MARIA_HA *info, uchar *buf, int inx)
       error= _ma_search_first(info, keyinfo, share->state.key_root[inx]);
       break;
     }
+    /*
+      "search first" failed. This means we have no pivot for
+      "search next", or in other words MI_INFO::lastkey is
+      likely uninitialized.
+
+      Normally SQL layer would never request "search next" if
+      "search first" failed. But HANDLER may do anything.
+
+      As mi_rnext() without preceeding mi_rkey()/mi_rfirst()
+      equals to mi_rfirst(), we must restore original state
+      as if failing mi_rfirst() was not called.
+    */
+    if (error)
+      update_mask|= HA_STATE_PREV_FOUND;
   }
   else
   {
@@ -104,7 +119,7 @@ int maria_rnext(MARIA_HA *info, uchar *buf, int inx)
 
 	/* Don't clear if database-changed */
   info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED);
-  info->update|= HA_STATE_NEXT_FOUND;
+  info->update|= update_mask;
 
   if (error)
   {
diff --git a/storage/maria/ma_rsame.c b/storage/maria/ma_rsame.c
index 4bdbfd526ba..4bd218a01df 100644
--- a/storage/maria/ma_rsame.c
+++ b/storage/maria/ma_rsame.c
@@ -36,7 +36,7 @@ int maria_rsame(MARIA_HA *info, uchar *record, int inx)
 {
   DBUG_ENTER("maria_rsame");
 
-  if (inx != -1 && ! maria_is_key_active(info->s->state.key_map, inx))
+  if (inx >= 0 && !_ma_check_index(info, inx))
   {
     DBUG_PRINT("error", ("wrong index usage"));
     DBUG_RETURN(my_errno=HA_ERR_WRONG_INDEX);
@@ -55,8 +55,7 @@ int maria_rsame(MARIA_HA *info, uchar *record, int inx)
 
   if (inx >= 0)
   {
-    MARIA_KEYDEF *keyinfo= info->s->keyinfo + inx;
-    info->lastinx= inx;
+    MARIA_KEYDEF *keyinfo= info->last_key.keyinfo;
     (*keyinfo->make_key)(info, &info->last_key, (uint) inx,
                          info->lastkey_buff, record,
                          info->cur_row.lastpos,
diff --git a/storage/maria/ma_search.c b/storage/maria/ma_search.c
index 9f1e8e2554b..61ac1c6c23b 100644
--- a/storage/maria/ma_search.c
+++ b/storage/maria/ma_search.c
@@ -38,6 +38,8 @@ int _ma_check_index(MARIA_HA *info, int inx)
   if (info->lastinx != inx)             /* Index changed */
   {
     info->lastinx = inx;
+    info->last_key.keyinfo= info->s->keyinfo + inx;
+    info->last_key.flag= 0;
     info->page_changed=1;
     info->update= ((info->update & (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED)) |
                    HA_STATE_NEXT_FOUND | HA_STATE_PREV_FOUND);
@@ -180,7 +182,6 @@ static int _ma_search_no_save(register MARIA_HA *info, MARIA_KEY *key,
     }
   }
 
-  info->last_key.keyinfo= keyinfo;
   if ((nextflag & (SEARCH_SMALLER | SEARCH_LAST)) && flag != 0)
   {
     uint not_used[2];
@@ -1696,7 +1697,7 @@ int _ma_search_next(register MARIA_HA *info, MARIA_KEY *key,
   }
 
   tmp_key.data=   lastkey;
-  info->last_key.keyinfo= tmp_key.keyinfo= keyinfo;
+  tmp_key.keyinfo= keyinfo;
 
   if (nextflag & SEARCH_BIGGER)                                 /* Next key */
   {
@@ -1778,8 +1779,6 @@ int _ma_search_first(MARIA_HA *info, MARIA_KEYDEF *keyinfo,
     first_pos= page.buff + share->keypage_header + page.node;
   } while ((pos= _ma_kpos(page.node, first_pos)) != HA_OFFSET_ERROR);
 
-  info->last_key.keyinfo= keyinfo;
-
   if (!(*keyinfo->get_key)(&info->last_key, page.flag, page.node, &first_pos))
     DBUG_RETURN(-1);                            /* Crashed */
 
@@ -1830,8 +1829,6 @@ int _ma_search_last(MARIA_HA *info, MARIA_KEYDEF *keyinfo,
     end_of_page= page.buff + page.size;
   } while ((pos= _ma_kpos(page.node, end_of_page)) != HA_OFFSET_ERROR);
 
-  info->last_key.keyinfo= keyinfo;
-
   if (!_ma_get_last_key(&info->last_key, &page, end_of_page))
     DBUG_RETURN(-1);
   info->cur_row.lastpos= _ma_row_pos_from_key(&info->last_key);
diff --git a/storage/maria/ma_unique.c b/storage/maria/ma_unique.c
index a90578c2162..6090c624f36 100644
--- a/storage/maria/ma_unique.c
+++ b/storage/maria/ma_unique.c
@@ -43,6 +43,7 @@ my_bool _ma_check_unique(MARIA_HA *info, MARIA_UNIQUEDEF *def, uchar *record,
 
   /* The above changed info->lastkey_buff2. Inform maria_rnext_same(). */
   info->update&= ~HA_STATE_RNEXT_SAME;
+  info->last_key.keyinfo= keyinfo;
 
   DBUG_ASSERT(key.data_length == MARIA_UNIQUE_HASH_LENGTH);
   if (_ma_search(info, &key, SEARCH_FIND, info->s->state.key_root[def->key]))