merge with 3.23 to get bugfixes for <=> NULL and --bind-address

Build-tools/Do-compile

@@ -72,6 +72,12 @@ if (@config_env > 0)
 	$opt_config_env= join(" ", @config_env);
 }
 
+if (@config_env > 0)
+{
+	chomp(@config_env);
+	$opt_config_env= join(" ", @config_env);
+}
+
 chomp($host=`hostname`);
 $full_host_name=$host;
 $connect_option= ($opt_tcpip ? "--host=$host" : "");

bdb/dist/aclocal/mutex.m4

@@ -403,5 +403,7 @@ UTS/cc-assembly)	ADDITIONAL_OBJS="$ADDITIONAL_OBJS uts4.cc${o}"
 			AC_DEFINE(HAVE_MUTEX_UTS_CC_ASSEMBLY);;
 x86/gcc-assembly)	ADDITIONAL_OBJS="mut_tas${o} $ADDITIONAL_OBJS"
 			AC_DEFINE(HAVE_MUTEX_X86_GCC_ASSEMBLY);;
+x86_64/gcc-assembly)	ADDITIONAL_OBJS="mut_tas${o} $ADDITIONAL_OBJS"
+			AC_DEFINE(HAVE_MUTEX_X86_64_GCC_ASSEMBLY);;
 esac
 ])dnl

mysql-test/r/null_key.result

@@ -228,3 +228,20 @@ alter table t1 add key id (id);
 select * from t1, t2 where t1.id = t2.id;
 id	id
 drop table t1,t2;
+id	id2
+NULL	0
+1	1
+id	id2
+NULL	0
+id	id2
+NULL	0
+1	1
+id	id2
+NULL	0
+1	1
+id	id2
+1	1
+id	id2
+1	1
+id	id2
+1	1

mysql-test/t/func_time.test

@@ -166,6 +166,7 @@ select to_days("0000-00-00"),to_days(d),to_days(dt),to_days(t),to_days(c) from t
 select extract(MONTH FROM "0000-00-00"),extract(MONTH FROM d),extract(MONTH FROM dt),extract(MONTH FROM t),extract(MONTH FROM c) from t1;
 drop table t1;
 
+
 #
 # Test problem with TIMESTAMP and BETWEEN
 #

mysql-test/t/null_key.test

@@ -135,3 +135,24 @@ select * from t1, t2 where t1.id = t2.id;
 alter table t1 add key id (id);
 select * from t1, t2 where t1.id = t2.id;
 drop table t1,t2;
+
+#
+# Check bug when doing <=> NULL on an indexed null field
+#
+
+create table t1 (
+  id  integer,
+  id2 integer not null,
+  index (id),
+  index (id2)
+);
+insert into t1 values(null,null),(1,1);
+select * from t1;
+select * from t1 where id <=> null;
+select * from t1 where id <=> null or id > 0;
+select * from t1 where id is null or id > 0;
+select * from t1 where id2 <=> null or id2 > 0;
+select * from t1 where id2 is null or id2 > 0;
+delete from t1 where id <=> NULL;
+select * from t1;
+drop table t1;

sql/mysqld.cc

@@ -4228,7 +4228,7 @@ get_one_option(int optid, const struct my_option *opt __attribute__((unused)),
     else
     {
       struct hostent *ent;
-      if (!argument || !argument[0])
+      if (argument || argument[0])
 	ent=gethostbyname(argument);
       else
       {
@@ -4417,7 +4417,6 @@ get_one_option(int optid, const struct my_option *opt __attribute__((unused)),
   }
   return 0;
 }
-
 	/* Initiates DEBUG - but no debugging here ! */
 
 static void get_options(int argc,char **argv)

sql/opt_range.cc

@@ -936,8 +936,11 @@ get_mm_leaf(PARAM *param, Field *field, KEY_PART *key_part,
     if (!(res= value->val_str(&tmp)))
       DBUG_RETURN(&null_element);
 
-    // Check if this was a function. This should have be optimized away
-    // in the sql_select.cc
+    /*
+      TODO:
+      Check if this was a function. This should have be optimized away
+      in the sql_select.cc
+    */
     if (res != &tmp)
     {
       tmp.copy(*res);				// Get own copy
@@ -1017,8 +1020,10 @@ get_mm_leaf(PARAM *param, Field *field, KEY_PART *key_part,
       type != Item_func::EQUAL_FUNC)
     DBUG_RETURN(0);				// Can't optimize this
 
-  /* We can't always use indexes when comparing a string index to a number */
-  /* cmp_type() is checked to allow compare of dates to numbers */
+  /*
+    We can't always use indexes when comparing a string index to a number
+    cmp_type() is checked to allow compare of dates to numbers
+  */
   if (field->result_type() == STRING_RESULT &&
       value->result_type() != STRING_RESULT &&
       field->cmp_type() != value->result_type())
@@ -1026,6 +1031,7 @@ get_mm_leaf(PARAM *param, Field *field, KEY_PART *key_part,
 
   if (value->save_in_field(field))
   {
+    /* This happens when we try to insert a NULL field in a not null column */
     // TODO; Check if we can we remove the following block.
     if (type == Item_func::EQUAL_FUNC)
     {
@@ -1037,7 +1043,7 @@ get_mm_leaf(PARAM *param, Field *field, KEY_PART *key_part,
       *str = 1;
       DBUG_RETURN(new SEL_ARG(field,str,str));
     }
-    DBUG_RETURN(&null_element);			// NULL is never true
+    DBUG_RETURN(&null_element);			// cmp with NULL is never true
   }
   // Get local copy of key
   char *str= (char*) alloc_root(param->mem_root,
@@ -1045,7 +1051,7 @@ get_mm_leaf(PARAM *param, Field *field, KEY_PART *key_part,
   if (!str)
     DBUG_RETURN(0);
   if (maybe_null)
-    *str=0;					// Not NULL
+    *str= (char) field->is_real_null();		// Set to 1 if null
   field->get_key_image(str+maybe_null,key_part->part_length);
   if (!(tree=new SEL_ARG(field,str,str)))
     DBUG_RETURN(0);