WL#7575 Remove ndbinfo's usage of other engine

 - improve comments

Author: blaudden

mysql-test/suite/ndb/r/ndbinfo.result

@@ -1297,7 +1297,7 @@ drop view frag_ops;
 drop table t1;
 drop table t2;
 
-## Check the new tables return data and exists.
+## Check that the new tables return data and exists.
 select count(*) > 10 from ndb$blocks;
 count(*) > 10
 1
@@ -1311,7 +1311,7 @@ type_id	type_name
 2	User table
 select * from ndb$dbtc_apiconnect_state;
 select * from ndb$dblqh_tcconnect_state;
-## Check the new views return data and exists.
+## Check that the new views return data and exists.
 select block_number from blocks where block_name = "DBTC";
 block_number
 245

mysql-test/suite/ndb/t/ndbinfo.test

@@ -686,7 +686,7 @@ drop table t2;
 # - three new views was added to preserve backwards compatibility
 #   for those tabes which was changed to prefix ndb$
 
-## Check the new tables return data and exists.
+## Check that the new tables return data and exists.
 select count(*) > 10 from ndb$blocks;
 select param_number, param_name from ndb$config_params
   where param_name = "DataMemory";
@@ -696,7 +696,7 @@ select * from ndb$dbtc_apiconnect_state;
 select * from ndb$dblqh_tcconnect_state;
 --enable_result_log
 
-## Check the new views return data and exists.
+## Check that the new views return data and exists.
 select block_number from blocks where block_name = "DBTC";
 select param_name from config_params where param_number = 101;
 select type_name from ndb$dict_obj_types where type_id = 3;

storage/ndb/tools/ndbinfo_sql.cpp

@@ -367,6 +367,12 @@ struct view {
     "ON name.parent_obj_id=parent_name.id AND "
     "name.parent_obj_type=parent_name.type"
   },
+  // The blocks, dict_obj_types and config_params used
+  // to be stored in a different engine but have now
+  // been folded into hardcoded ndbinfo tables whose
+  // name include the special prefix.
+  // These views are defined to provide backward compatibility
+  // for code using the old names.
   { "blocks",
     "SELECT block_number, block_name "
     "FROM `<NDBINFO_DB>`.`<TABLE_PREFIX>blocks`"