Fix test results that may change from run to run

Added comments (from code review on pull)


mysql-test/r/heap.result:
  Fix results that may change from run to run
mysql-test/r/ps_5merge.result:
  Fix wrong result
mysql-test/t/heap.test:
  Make results predictable
sql/sql_show.cc:
  Add comments
  Fixed typo

mysql-test/r/heap.result

@@ -622,7 +622,7 @@ qq
 *a         *a*a         *
 explain select * from t1 where v='a';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	v	v	13	const	7	Using where
+1	SIMPLE	t1	ref	v	v	13	const	#	Using where
 drop table t1;
 create table t1 (a char(10), unique using btree (a)) engine=heap;
 insert into t1 values ('a');

mysql-test/r/ps_5merge.result

@@ -1698,7 +1698,7 @@ t5	CREATE TABLE `t5` (
   `param03` double default NULL,
   `const04` varchar(3) NOT NULL default '',
   `param04` longtext,
-  `const05` binary(3) NOT NULL default '',
+  `const05` varbinary(3) NOT NULL default '',
   `param05` longblob,
   `const06` varchar(10) NOT NULL default '',
   `param06` longtext,
@@ -4707,7 +4707,7 @@ t5	CREATE TABLE `t5` (
   `param03` double default NULL,
   `const04` varchar(3) NOT NULL default '',
   `param04` longtext,
-  `const05` varchar(3) NOT NULL default '',
+  `const05` varbinary(3) NOT NULL default '',
   `param05` longblob,
   `const06` varchar(10) NOT NULL default '',
   `param06` longtext,

mysql-test/t/heap.test

@@ -360,6 +360,8 @@ explain select count(*) from t1 where v between 'a' and 'a ' and v between 'a  '
 --error 1062
 alter table t1 add unique(v);
 select concat('*',v,'*',c,'*',t,'*') as qq from t1 where v='a' order by length(concat('*',v,'*',c,'*',t,'*'));
+# Number of rows is not constant for b-trees keys
+--replace_column 9 #
 explain select * from t1 where v='a';
 
 drop table t1;

sql/sql_show.cc

@@ -2135,6 +2135,10 @@ int get_all_tables(THD *thd, TABLE_LIST *tables, COND *cond)
           }
         }
       }
+      /*
+        If we have information schema its always the first table and only
+        the first table. Reset for other tables.
+      */
       with_i_schema= 0;
     }
   }
@@ -2838,7 +2842,7 @@ static int get_schema_views_record(THD *thd, struct st_table_list *tables,
 }
 
 
-void store_constarints(TABLE *table, const char*db, const char *tname,
+void store_constraints(TABLE *table, const char*db, const char *tname,
                        const char *key_name, uint key_len,
                        const char *con_type, uint con_len)
 {
@@ -2874,10 +2878,10 @@ static int get_schema_constarints_record(THD *thd, struct st_table_list *tables,
         continue;
 
       if (i == primary_key && !strcmp(key_info->name, primary_key_name))
-        store_constarints(table, base_name, file_name, key_info->name,
+        store_constraints(table, base_name, file_name, key_info->name,
                           strlen(key_info->name), "PRIMARY KEY", 11);
       else if (key_info->flags & HA_NOSAME)
-        store_constarints(table, base_name, file_name, key_info->name,
+        store_constraints(table, base_name, file_name, key_info->name,
                           strlen(key_info->name), "UNIQUE", 6);        
     }
 
@@ -2886,7 +2890,7 @@ static int get_schema_constarints_record(THD *thd, struct st_table_list *tables,
     List_iterator_fast<FOREIGN_KEY_INFO> it(f_key_list);
     while ((f_key_info=it++))
     {
-      store_constarints(table, base_name, file_name, f_key_info->forein_id->str,
+      store_constraints(table, base_name, file_name, f_key_info->forein_id->str,
                         strlen(f_key_info->forein_id->str), "FOREIGN KEY", 11);
     }
   }