Revert "MDEV-11016 wsrep_node_is_ready() check is too strict"

This reverts commit 7ed5563b.

mysql-test/suite/galera/r/galera_var_dirty_reads.result

@@ -18,19 +18,6 @@ SET @@session.wsrep_dirty_reads=ON;
 SELECT * FROM t1;
 i
 1
-SET @@session.wsrep_dirty_reads=OFF;
-SELECT 2;
-2
-2
-SELECT @@max_allowed_packet;
-@@max_allowed_packet
-4194304
-SELECT 2+2 from DUAL;
-2+2
-4
-SELECT sysdate() from DUAL;
-sysdate()
-2016-10-28 23:13:06
 SELECT * FROM t1;
 i
 1

mysql-test/suite/galera/t/galera_var_dirty_reads.test

@@ -36,13 +36,6 @@ SET @@session.wsrep_dirty_reads=ON;
 
 SELECT * FROM t1;
 
-#Select query which does not access table should be allowed MDEV-11016
-SET @@session.wsrep_dirty_reads=OFF;
-SELECT 2;
-SELECT @@max_allowed_packet;
-SELECT 2+2 from DUAL;
-SELECT sysdate() from DUAL;
-
 --disable_query_log
 --eval SET @@global.wsrep_cluster_address = '$wsrep_cluster_address_saved'
 --enable_query_log

sql/sql_parse.cc

@@ -2650,15 +2650,12 @@ mysql_execute_command(THD *thd)
 
     /*
       Bail out if DB snapshot has not been installed. We however, allow SET,
-      SHOW and SELECT queries (only if wsrep_dirty_reads is set or when it
-      does not access any table).
+      SHOW and SELECT queries (only if wsrep_dirty_reads is set).
     */
     if (lex->sql_command != SQLCOM_SET_OPTION  &&
         !wsrep_is_show_query(lex->sql_command) &&
         !(thd->variables.wsrep_dirty_reads     &&
           lex->sql_command == SQLCOM_SELECT)   &&
-        !(lex->sql_command == SQLCOM_SELECT    &&
-          !all_tables)                         &&
         !wsrep_node_is_ready(thd))
       goto error;
   }