BUG#18581 (Creation of system tables recorded in binlog causing slave failure):

Not replicating the mysql database *at all* any more. All changes to
mysql tables are replicated by replicating the statements that do
the changes.


mysql-test/r/rpl_do_grant.result:
  Result change
mysql-test/t/rpl_do_grant.test:
  Deleting grants on both master and server since the mysql
  database is not replicated any more.
sql/handler.cc:
  Removing code that selectively checks what tables in the mysql
  database to ignore. The entire mysql database is not replicated
  any more.
sql/log_event.cc:
  Disabling code to reload grants and access when certain tables are
  touched.
sql/rpl_rli.h:
  Removing unused code.
sql/slave.cc:
  Removing unused code.
sql/sql_class.cc:
  Mysql queries (i.e., queries that affects tables in the mysql database)
  are now replicated by statement instead of replicating the tables in
  the mysql database.

7 files changed, 22 insertions, 136 deletions

diff --git a/mysql-test/r/rpl_do_grant.result b/mysql-test/r/rpl_do_grant.result
index 8bf8e615448..50d181be0ca 100644
--- a/mysql-test/r/rpl_do_grant.result
+++ b/mysql-test/r/rpl_do_grant.result
@@ -23,6 +23,8 @@ password<>_binary''
 delete from mysql.user where user=_binary'rpl_do_grant';
 delete from mysql.db where user=_binary'rpl_do_grant';
 flush privileges;
+delete from mysql.user where user=_binary'rpl_do_grant';
+delete from mysql.db where user=_binary'rpl_do_grant';
 flush privileges;
 show grants for rpl_do_grant@localhost;
 ERROR 42000: There is no such grant defined for user 'rpl_do_grant' on host 'localhost'
diff --git a/mysql-test/t/rpl_do_grant.test b/mysql-test/t/rpl_do_grant.test
index 8d6f99e4bf1..4e398114269 100644
--- a/mysql-test/t/rpl_do_grant.test
+++ b/mysql-test/t/rpl_do_grant.test
@@ -39,11 +39,11 @@ connection master;
 delete from mysql.user where user=_binary'rpl_do_grant';
 delete from mysql.db where user=_binary'rpl_do_grant';
 flush privileges;
-save_master_pos;
-connection slave;
-sync_with_master;
-# no need to delete manually, as the DELETEs must have done some real job on
-# master (updated binlog)
+sync_slave_with_master;
+# The mysql database is not replicated, so we have to do the deletes
+# manually on the slave as well. 
+delete from mysql.user where user=_binary'rpl_do_grant';
+delete from mysql.db where user=_binary'rpl_do_grant';
 flush privileges;
 
 # End of 4.1 tests
diff --git a/sql/handler.cc b/sql/handler.cc
index ccf1a1ef8d9..fc8bc939961 100644
--- a/sql/handler.cc
+++ b/sql/handler.cc
@@ -3456,38 +3456,15 @@ bool ha_show_status(THD *thd, handlerton *db_type, enum ha_stat_type stat)
    declared static, but it works by putting it into an anonymous
    namespace. */
 namespace {
-  struct st_table_data {
-    char const *db;
-    char const *name;
-  };
-
-  static int table_name_compare(void const *a, void const *b)
-  {
-    st_table_data const *x = (st_table_data const*) a;
-    st_table_data const *y = (st_table_data const*) b;
-
-    /* Doing lexical compare in order (db,name) */
-    int const res= strcmp(x->db, y->db);
-    return res != 0 ? res : strcmp(x->name, y->name);
-  }
-
   bool check_table_binlog_row_based(THD *thd, TABLE *table)
   {
-    static st_table_data const ignore[] = {
-      { "mysql", "event" },
-      { "mysql", "general_log" },
-      { "mysql", "slow_log" }
-    };
-
-    my_size_t const ignore_size = sizeof(ignore)/sizeof(*ignore);
-    st_table_data const item = { table->s->db.str, table->s->table_name.str };
-
     if (table->s->cached_row_logging_check == -1)
-      table->s->cached_row_logging_check=
-        (table->s->tmp_table == NO_TMP_TABLE) &&
-        binlog_filter->db_ok(table->s->db.str) &&
-        bsearch(&item, ignore, ignore_size,
-                sizeof(st_table_data), table_name_compare) == NULL;
+    {
+      int const check(table->s->tmp_table == NO_TMP_TABLE &&
+                      binlog_filter->db_ok(table->s->db.str) &&
+                      strcmp("mysql", table->s->db.str) != 0);
+      table->s->cached_row_logging_check= check;
+    }
 
     DBUG_ASSERT(table->s->cached_row_logging_check == 0 ||
                 table->s->cached_row_logging_check == 1);
diff --git a/sql/log_event.cc b/sql/log_event.cc
index 4a6346bf57c..09f0678f64b 100644
--- a/sql/log_event.cc
+++ b/sql/log_event.cc
@@ -5694,7 +5694,6 @@ int Rows_log_event::exec_event(st_relay_log_info *rli)
     for (ptr= rli->tables_to_lock ; ptr ; ptr= ptr->next_global)
     {
       rli->m_table_map.set_table(ptr->table_id, ptr->table);
-      rli->touching_table(ptr->db, ptr->table_name, ptr->table_id);
     }
 #ifdef HAVE_QUERY_CACHE
     query_cache.invalidate_locked_for_write(rli->tables_to_lock);
diff --git a/sql/rpl_rli.h b/sql/rpl_rli.h
index 392f12c2a71..38c51dc9d56 100644
--- a/sql/rpl_rli.h
+++ b/sql/rpl_rli.h
@@ -289,22 +289,6 @@ typedef struct st_relay_log_info
   void cached_charset_invalidate();
   bool cached_charset_compare(char *charset);
 
-  /*
-    To reload special tables when they are changes, we introduce a set
-    of functions that will mark whenever special functions need to be
-    called after modifying tables.  Right now, the tables are either
-    ACL tables or grants tables.
-  */
-  enum enum_reload_flag
-  {
-    RELOAD_NONE_F   = 0UL,
-    RELOAD_GRANT_F  = (1UL << 0), 
-    RELOAD_ACCESS_F = (1UL << 1)
-  };
-
-  ulong m_reload_flags;
-
-  void touching_table(char const* db, char const* table, ulong table_id);
   void transaction_end(THD*);
 
   void cleanup_context(THD *, bool);
diff --git a/sql/slave.cc b/sql/slave.cc
index 1852ff68070..26853fd514c 100644
--- a/sql/slave.cc
+++ b/sql/slave.cc
@@ -2373,7 +2373,6 @@ st_relay_log_info::st_relay_log_info()
    inited(0), abort_slave(0), slave_running(0), until_condition(UNTIL_NONE),
    until_log_pos(0), retried_trans(0),
    tables_to_lock(0), tables_to_lock_count(0),
-   m_reload_flags(RELOAD_NONE_F),
    unsafe_to_stop_at(0)
 {
   DBUG_ENTER("st_relay_log_info::st_relay_log_info");
@@ -4989,87 +4988,12 @@ end:
   DBUG_VOID_RETURN;
 }
 
-/*
-  Some system tables needed to be re-read by the MySQL server after it has
-  updated them; in statement-based replication, the GRANT and other commands
-  are sent verbatim to the slave which then reloads; in row-based replication,
-  changes to these tables are done through ordinary Rows binlog events, so
-  master must add some flag for the slave to know it has to reload the tables.
-*/
-struct st_reload_entry
-{
-  char const *table;
-  st_relay_log_info::enum_reload_flag flag;
-};
-
-/*
-  Sorted array of table names, please keep it sorted since we are
-  using bsearch() on it below.
- */
-static st_reload_entry s_mysql_tables[] =
-{
-  { "columns_priv", st_relay_log_info::RELOAD_GRANT_F },
-  { "db",           st_relay_log_info::RELOAD_ACCESS_F },
-  { "host",         st_relay_log_info::RELOAD_ACCESS_F },
-  { "procs_priv",   st_relay_log_info::RELOAD_GRANT_F },
-  { "tables_priv",  st_relay_log_info::RELOAD_GRANT_F },
-  { "user",         st_relay_log_info::RELOAD_ACCESS_F }
-};
-
-static const my_size_t s_mysql_tables_size =
-  sizeof(s_mysql_tables)/sizeof(*s_mysql_tables);
-
-static int reload_entry_compare(const void *lhs, const void *rhs)
-{
-  const char *lstr = static_cast<const char *>(lhs);
-  const char *rstr = static_cast<const st_reload_entry*>(rhs)->table;
-  DBUG_ENTER("reload_entry_compare");
-
-  DBUG_RETURN(strcmp(lstr, rstr));
-}
-
-void st_relay_log_info::touching_table(char const* db, char const* table,
-                                       ulong table_id)
-{
-  DBUG_ENTER("st_relay_log_info::touching_table");
-
-  if (strcmp(db,"mysql") == 0)
-  {
-#if defined(HAVE_BSEARCH) && defined(HAVE_SIZE_T)
-    void *const ptr= bsearch(table, s_mysql_tables,
-                             s_mysql_tables_size,
-                             sizeof(*s_mysql_tables), reload_entry_compare);
-    st_reload_entry const *const entry= static_cast<st_reload_entry*>(ptr);
-#else
-    /*
-      Fall back to full scan, there are few rows anyway and updating the
-      "mysql" database is rare.
-    */
-    st_reload_entry const *entry= s_mysql_tables;
-    for ( ; entry < s_mysql_tables + s_mysql_tables_size ; entry++)
-      if (reload_entry_compare(table, entry) == 0)
-        break;
-#endif
-    if (entry)
-      m_reload_flags|= entry->flag;
-  }
-  DBUG_VOID_RETURN;
-}
-
 void st_relay_log_info::transaction_end(THD* thd)
 {
   DBUG_ENTER("st_relay_log_info::transaction_end");
-
-  if (m_reload_flags != RELOAD_NONE_F)
-  {
-    if (m_reload_flags & RELOAD_ACCESS_F)
-      acl_reload(thd);
-
-    if (m_reload_flags & RELOAD_GRANT_F)
-      grant_reload(thd);
-
-    m_reload_flags= RELOAD_NONE_F;
-  }
+  /*
+    Nothing to do here. Maybe remove the function?
+   */
   DBUG_VOID_RETURN;
 }
 
diff --git a/sql/sql_class.cc b/sql/sql_class.cc
index 3fd0e621422..618d1a2e112 100644
--- a/sql/sql_class.cc
+++ b/sql/sql_class.cc
@@ -2778,6 +2778,12 @@ int THD::binlog_query(THD::enum_binlog_query_type qtype,
 #endif /*HAVE_ROW_BASED_REPLICATION*/
 
   switch (qtype) {
+  case THD::ROW_QUERY_TYPE:
+#ifdef HAVE_ROW_BASED_REPLICATION
+    if (current_stmt_binlog_row_based)
+      DBUG_RETURN(0);
+#endif
+    /* Otherwise, we fall through */
   case THD::MYSQL_QUERY_TYPE:
     /*
       Using this query type is a conveniece hack, since we have been
@@ -2787,12 +2793,6 @@ int THD::binlog_query(THD::enum_binlog_query_type qtype,
       Make sure to change in check_table_binlog_row_based() according
       to how you treat this.
     */
-  case THD::ROW_QUERY_TYPE:
-#ifdef HAVE_ROW_BASED_REPLICATION
-    if (current_stmt_binlog_row_based)
-      DBUG_RETURN(0);
-#endif
-    /* Otherwise, we fall through */
   case THD::STMT_QUERY_TYPE:
     /*
       The MYSQL_LOG::write() function will set the STMT_END_F flag and