Merge 10.6 into 10.10

Author: dr-m

include/m_ctype.h

@@ -1865,6 +1865,9 @@ my_well_formed_length(CHARSET_INFO *cs, const char *b, const char *e,
 #include "t_ctype.h"
 #endif
 
+int my_wc_mb_utf8mb4_bmp_only(CHARSET_INFO *cs, my_wc_t wc, uchar *r,
+                              uchar *e);
+
 #ifdef	__cplusplus
 }
 #endif

libmariadb

@@ -51,6 +51,7 @@ ENDIF()
 SET(SQL_EMBEDDED_SOURCES emb_qcache.cc libmysqld.c lib_sql.cc 
            libmysql.c ../sql-common/errmsg.c
            ../sql-common/client.c
+           ../sql/cset_narrowing.cc
            ../sql-common/my_user.c ../sql-common/pack.c
            ../sql-common/client_plugin.c
            ../sql/password.c ../sql/discover.cc ../sql/derror.cc 

libmysqld/CMakeLists.txt

@@ -417,5 +417,31 @@ test	t1	B	1	NULL
 test	t1	B	2	NULL
 drop table t1;
 #
+# Crash inis_eits_usable()
+#
+CREATE TABLE t1 (a int) ENGINE=MyISAM;
+CREATE TABLE t2 (b int) ENGINE=MyISAM;
+INSERT INTO t1 (a) VALUES (4), (6);
+INSERT INTO t2 (b) VALUES (0), (8);
+set @save_join_cache_level=@@join_cache_level;
+set @save_optimizer_switch=@@optimizer_switch;
+SET join_cache_level=3;
+SET optimizer_switch='join_cache_hashed=on';
+SET optimizer_switch='join_cache_bka=on';
+set optimizer_switch='hash_join_cardinality=on';
+select benchmark(1,1);
+benchmark(1,1)
+0
+EXPLAIN
+SELECT * FROM t1, t2 WHERE b=a;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
+1	SIMPLE	t2	hash_ALL	NULL	#hash#$hj	5	test.t1.a	2	Using where; Using join buffer (flat, BNLH join)
+SELECT * FROM t1, t2 WHERE b=a;
+a	b
+DROP TABLE t1,t2;
+set @@optimizer_switch=@save_optimizer_switch;
+set @@join_cache_level=@save_join_cache_level;
+#
 # End of 10.6 tests
 #

mysql-test/main/analyze.result

@@ -269,6 +269,33 @@ alter ignore table t1 rename key `b` to `B`, LOCK=shared;
 select * from mysql.index_stats where table_name= "t1";
 drop table t1;
 
+--echo #
+--echo # Crash inis_eits_usable()
+--echo #
+
+CREATE TABLE t1 (a int) ENGINE=MyISAM;
+
+CREATE TABLE t2 (b int) ENGINE=MyISAM;
+
+INSERT INTO t1 (a) VALUES (4), (6);
+INSERT INTO t2 (b) VALUES (0), (8);
+
+set @save_join_cache_level=@@join_cache_level;
+set @save_optimizer_switch=@@optimizer_switch;
+SET join_cache_level=3;
+SET optimizer_switch='join_cache_hashed=on';
+SET optimizer_switch='join_cache_bka=on';
+set optimizer_switch='hash_join_cardinality=on';
+
+select benchmark(1,1);
+EXPLAIN
+SELECT * FROM t1, t2 WHERE b=a;
+SELECT * FROM t1, t2 WHERE b=a;
+DROP TABLE t1,t2;
+
+set @@optimizer_switch=@save_optimizer_switch;
+set @@join_cache_level=@save_join_cache_level;
+
 --echo #
 --echo # End of 10.6 tests
 --echo #