Manually merged

myisam/mi_check.c:
  Auto merged
myisam/myisamchk.c:
  Auto merged
mysql-test/r/myisam.result:
  Auto merged
mysql-test/t/func_in.test:
  Auto merged
sql/ha_myisam.cc:
  Auto merged
sql/mysqld.cc:
  Auto merged
sql/sql_select.cc:
  Manually merged.

myisam/mi_check.c

@@ -3994,7 +3994,7 @@ void update_auto_increment_key(MI_CHECK *param, MI_INFO *info,
     ...
     The 'unique' array is collected in one sequential scan through the entire
     index. This is done in two places: in chk_index() and in sort_key_write().
-    Statistics collection may consider NULLs as either equal or inequal (see
+    Statistics collection may consider NULLs as either equal or unequal (see
     SEARCH_NULL_ARE_NOT_EQUAL, MI_STATS_METHOD_*).
 
     Output is an array:

myisam/myisamchk.c

@@ -67,7 +67,7 @@ static const char *field_pack[]=
  "no zeros", "blob", "constant", "table-lockup",
  "always zero","varchar","unique-hash","?","?"};
 
-static const char *myisam_stats_method_str="nulls_inequal";
+static const char *myisam_stats_method_str="nulls_unequal";
 
 static void get_options(int *argc,char * * *argv);
 static void print_version(void);
@@ -339,7 +339,7 @@ static struct my_option my_long_options[] =
     REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
   {"stats_method", OPT_STATS_METHOD,
    "Specifies how index statistics collection code should threat NULLs. "
-   "Possible values of name are \"nulls_inequal\" (default behavior for 4.1/5.0), and \"nulls_equal\" (emulate 4.0 behavior).",
+   "Possible values of name are \"nulls_unequal\" (default behavior for 4.1/5.0), and \"nulls_equal\" (emulate 4.0 behavior).",
    (gptr*) &myisam_stats_method_str, (gptr*) &myisam_stats_method_str, 0,
     GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
   { 0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}
@@ -471,7 +471,7 @@ static void usage(void)
 
 #include <help_end.h>
 
-const char *myisam_stats_method_names[] = {"nulls_inequal", "nulls_equal",
+const char *myisam_stats_method_names[] = {"nulls_unequal", "nulls_equal",
                                            NullS};
 TYPELIB myisam_stats_method_typelib= {
   array_elements(myisam_stats_method_names) - 1, "",

mysql-test/r/func_in.result

@@ -193,6 +193,15 @@ select * from t1 where a in (NULL, 'aa');
 a
 aa
 drop table t1;
+create table t1 (id int, key(id));
+insert into t1 values (1),(2),(3);
+select count(*) from t1 where id not in (1);
+count(*)
+2
+select count(*) from t1 where id not in (1,2);
+count(*)
+1
+drop table t1;
 CREATE TABLE t1 (a int PRIMARY KEY);
 INSERT INTO t1 VALUES (44), (45), (46);
 SELECT * FROM t1 WHERE a IN (45);

mysql-test/r/myisam.result

@@ -610,7 +610,7 @@ test.t2	984116287
 drop table t1, t2;
 show variables like 'myisam_stats_method';
 Variable_name	Value
-myisam_stats_method	nulls_inequal
+myisam_stats_method	nulls_unequal
 create table t1 (a int, key(a));
 insert into t1 values (0),(1),(2),(3),(4);
 insert into t1 select NULL from t1;
@@ -651,7 +651,7 @@ t1	1	a	1	a	A	5	NULL	NULL	YES	BTREE
 set myisam_stats_method=DEFAULT;
 show variables like 'myisam_stats_method';
 Variable_name	Value
-myisam_stats_method	nulls_inequal
+myisam_stats_method	nulls_unequal
 insert into t1 values (11);
 delete from t1 where a=11;
 analyze table t1;

mysql-test/t/func_in.test

@@ -102,6 +102,13 @@ insert into t1 values ('aa'), ('bb');
 select * from t1 where a in (NULL, 'aa');
 drop table t1;
 
+# BUG#13419
+create table t1 (id int, key(id));
+insert into t1 values (1),(2),(3);
+select count(*) from t1 where id not in (1);
+select count(*) from t1 where id not in (1,2);
+drop table t1;
+
 # End of 4.1 tests
 
 #

sql/ha_myisam.cc

@@ -39,7 +39,7 @@ const char *myisam_recover_names[] =
 TYPELIB myisam_recover_typelib= {array_elements(myisam_recover_names)-1,"",
 				 myisam_recover_names, NULL};
 
-const char *myisam_stats_method_names[] = {"nulls_inequal", "nulls_equal",
+const char *myisam_stats_method_names[] = {"nulls_unequal", "nulls_equal",
                                            NullS};
 TYPELIB myisam_stats_method_typelib= {
   array_elements(myisam_stats_method_names) - 1, "",

sql/mysqld.cc

@@ -432,7 +432,7 @@ char server_version[SERVER_VERSION_LENGTH];
 char *mysqld_unix_port, *opt_mysql_tmpdir;
 const char **errmesg;			/* Error messages */
 const char *myisam_recover_options_str="OFF";
-const char *myisam_stats_method_str="nulls_inequal";
+const char *myisam_stats_method_str="nulls_unequal";
 /* name of reference on left espression in rewritten IN subquery */
 const char *in_left_expr_name= "<left expr>";
 /* name of additional condition */
@@ -5519,7 +5519,7 @@ The minimum value for this variable is 4096.",
    GET_ULONG, REQUIRED_ARG, 8192*1024, 4, ~0L, 0, 1, 0},
   {"myisam_stats_method", OPT_MYISAM_STATS_METHOD,
    "Specifies how MyISAM index statistics collection code should threat NULLs. "
-   "Possible values of name are \"nulls_inequal\" (default behavior for 4.1/5.0), and \"nulls_equal\" (emulate 4.0 behavior).",
+   "Possible values of name are \"nulls_unequal\" (default behavior for 4.1/5.0), and \"nulls_equal\" (emulate 4.0 behavior).",
    (gptr*) &myisam_stats_method_str, (gptr*) &myisam_stats_method_str, 0,
     GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
   {"net_buffer_length", OPT_NET_BUFFER_LENGTH,
@@ -6106,7 +6106,7 @@ static void mysql_init_variables(void)
   query_id= thread_id= 1L;
   strmov(server_version, MYSQL_SERVER_VERSION);
   myisam_recover_options_str= sql_mode_str= "OFF";
-  myisam_stats_method_str= "nulls_inequal";
+  myisam_stats_method_str= "nulls_unequal";
   my_bind_addr = htonl(INADDR_ANY);
   threads.empty();
   thread_cache.empty();
@@ -6157,7 +6157,7 @@ static void mysql_init_variables(void)
   global_system_variables.old_passwords= 0;
   
   /*
-    Default behavior for 4.1 and 5.0 is to treat NULL values as inequal
+    Default behavior for 4.1 and 5.0 is to treat NULL values as unequal
     when collecting index statistics for MyISAM tables.
   */
   global_system_variables.myisam_stats_method= MI_STATS_METHOD_NULLS_NOT_EQUAL;

sql/sql_select.cc

@@ -2386,7 +2386,6 @@ merge_key_fields(KEY_FIELD *start,KEY_FIELD *new_fields,KEY_FIELD *end,
     field			Field used in comparision
     eq_func			True if we used =, <=> or IS NULL
     value			Value used for comparison with field
-                                Is NULL for BETWEEN and IN
     usable_tables		Tables which can be used for key optimization
 
   NOTES