fix according to review

client/mysqldump.c

@@ -1936,7 +1936,7 @@ static int dump_databases(char **db_names)
 static int init_dumping(char *database)
 {
   if (mysql_get_server_version(sock) >= 50003 &&
-      !strcmp(database, "information_schema"))
+      !my_strcasecmp(&my_charset_latin1, database, "information_schema"))
     return 1; 
 
   if (mysql_select_db(sock, database))

sql/sql_acl.cc

@@ -4673,6 +4673,10 @@ int fill_schema_table_privileges(THD *thd, TABLE_LIST *tables, COND *cond)
     if (table_access)
     {
       ulong test_access= table_access & ~GRANT_ACL;
+      /*
+        We should skip 'usage' privilege on table if
+        we have any privileges on column(s) of this table
+      */
       if (!test_access && grant_table->cols)
         continue;
       if (!(table_access & GRANT_ACL))

sql/sql_show.cc

@@ -1941,13 +1941,33 @@ static COND * make_cond_for_info_schema(COND *cond, TABLE_LIST *table)
 }
 
 
-int schema_db_add(THD *thd, List<char> *files, const char *wild)
+/*
+  Add 'information_schema' name to db_names list
+
+  SYNOPSIS
+    schema_db_add()
+    thd                   thread handler
+    files                 list of db names
+    wild                  wild string
+    with_i_schema         returns 1 if we added 'IS' name to list
+                          otherwise returns 0
+
+  RETURN
+    1	                  error
+    0	                  success
+*/
+
+int schema_db_add(THD *thd, List<char> *files,
+                  const char *wild, bool *with_i_schema)
 {
-  if (wild && wild_compare(information_schema_name.str, wild, 0))
-    return 0;
+  *with_i_schema= 0;
+  if (!wild || !wild_compare(information_schema_name.str, wild, 0))
+  {
+    *with_i_schema= 1;
     if (files->push_back(thd->strdup(information_schema_name.str)))
-    return -1;
       return 1;
+  }
+  return 0;
 }
 
 
@@ -2006,7 +2026,7 @@ int get_all_tables(THD *thd, TABLE_LIST *tables, COND *cond)
   INDEX_FIELD_VALUES idx_field_vals;
   char path[FN_REFLEN], *end= 0, *base_name, *file_name;
   uint len= 0;
-  int with_i_schema;
+  bool with_i_schema;
   List<char> bases;
   lex->all_selects_list= &sel;
   enum enum_schema_tables schema_table_idx=
@@ -2017,8 +2037,7 @@ int get_all_tables(THD *thd, TABLE_LIST *tables, COND *cond)
   get_index_field_values(lex, &idx_field_vals);
 
   /* information schema name always is first in list */
-  with_i_schema= schema_db_add(thd, &bases, idx_field_vals.db_value);
-  if (with_i_schema < 0)
+  if (schema_db_add(thd, &bases, idx_field_vals.db_value, &with_i_schema))
     return 1;
 
   if (mysql_find_files(thd, &bases, NullS, mysql_data_home,
@@ -2142,13 +2161,13 @@ int fill_schema_shemata(THD *thd, TABLE_LIST *tables, COND *cond)
   List<char> files;
   char *file_name;
   uint length;
-  int with_i_schema;
+  bool with_i_schema;
   HA_CREATE_INFO create;
   TABLE *table= tables->table;
 
   get_index_field_values(thd->lex, &idx_field_vals);
-  with_i_schema= schema_db_add(thd, &files, idx_field_vals.db_value);
-  if (with_i_schema < 0)
+  /* information schema name always is first in list */
+  if (schema_db_add(thd, &files, idx_field_vals.db_value, &with_i_schema))
     return 1;
   if (mysql_find_files(thd, &files, NullS, mysql_data_home,
                        idx_field_vals.db_value, 1))