Fix for BUG#12335 (SP replication) : New binlogging strategy for stored PROCEDUREs/FUNCTIONs.

"Interleaved SPs execution is now binlogged properly, "SELECT spfunc()" is binlogged too.
The known remaining issue is binlogging/replication of "a routine is deleted while it is executed" scenario.


mysql-test/r/rpl_sp.result:
  Fix for BUG#12335: updated test cases/results
mysql-test/t/rpl_sp.test:
  Fix for BUG#12335: updated test cases/results
sql/item.cc:
  Fix for BUG#12335 (SP replication): 
   - Added Item_name_const 'function'
   - Addede 'delete reuse' to call dtor on item reuse
sql/item.h:
  Fix for BUG#12335 (SP replication) : Added Item_name_const 'function' + code cleanup
sql/item_create.cc:
   Fix for BUG#12335 (SP replication) : Added Item_name_const 'function'
sql/item_create.h:
   Fix for BUG#12335 (SP replication) : Added Item_name_const 'function'
sql/item_func.cc:
  Fix for BUG#12335 (SP replication) : binary log is now constrolled from within execute_function.
sql/lex.h:
  Fix for BUG#12335 (SP replication) : Added Item_name_const 'function'
sql/log.cc:
  Fix for BUG#12335 (SP replication) : Added MYSQL_LOG::{start|stop}_union_events to allow
  one to temporary disable binlogging but collect a 'union' information about binlog write
  calls.
sql/mysql_priv.h:
  Fix for BUG#12335 (SP replication)
sql/sp_head.cc:
  Fix for BUG#12335 (SP replication) : Now we use different SP binlogging strategy, grep for 
  StoredRoutinesBinlogging for details
sql/sp_head.h:
  Comments added
sql/sp_pcontext.h:
  Comments added
sql/sp_rcontext.h:
  Comments added
sql/sql_class.cc:
  Fix for BUG#12335 (SP replication) : Now we use different SP binlogging strategy, grep for 
  StoredRoutinesBinlogging for details
sql/sql_class.h:
  Fix for BUG#12335 (SP replication) : Added MYSQL_LOG::{start|stop}_union_events to allow
  one to temporary disable binlogging but collect a 'union' information about binlog write
  calls.
sql/sql_delete.cc:
  Fix for BUG#12335: check THD::query_str_binlog_unsuitable when writing to binlog.
sql/sql_insert.cc:
  Fix for BUG#12335: check THD::query_str_binlog_unsuitable when writing to binlog.
sql/sql_lex.cc:
  Fix for BUG#12335 (SP replication): Add ability to extract previous returned token from
  the tokenizer.
sql/sql_lex.h:
  Fix for BUG#12335 (SP replication): Add ability to extract previous returned token from
  the tokenizer.
sql/sql_parse.cc:
  Fix for BUG#12335 (SP replication) : Now we use different SP binlogging strategy, grep for 
  StoredRoutinesBinlogging for details
sql/sql_update.cc:
  Fix for BUG#12335: check THD::query_str_binlog_unsuitable when writing to binlog.
sql/sql_yacc.yy:
  Fix for BUG#12335 (SP replication) : When creating Item_splocal, remember where it is located
  in the query.

sql/sql_class.h

@@ -311,6 +311,9 @@ public:
   bool write(Log_event* event_info); // binary log write
   bool write(THD *thd, IO_CACHE *cache, Log_event *commit_event);
 
+  void start_union_events(THD *thd);
+  void stop_union_events(THD *thd);
+
   /*
     v stands for vector
     invoked as appendv(buf1,len1,buf2,len2,...,bufn,lenn,0)
@@ -1346,7 +1349,34 @@ public:
     my_bool my_bool_value;
     long    long_value;
   } sys_var_tmp;
-
+  
+  /*
+    If true, thd->query is not a suitable query to write to binary log. This
+    is not handled everywhere currently - we check it only in statements
+    that can have SP variable references.
+  */
+  bool query_str_binlog_unsuitable;
+  
+  struct {
+    /* 
+      If true, mysql_bin_log::write(Log_event) call will not write events to 
+      binlog, and maintain 2 below variables instead (use
+      mysql_bin_log.start_union_events to turn this on)
+    */
+    bool do_union;
+    /*
+      If TRUE, at least one mysql_bin_log::write(Log_event) call has been
+      made after last mysql_bin_log.start_union_events() call.
+    */
+    bool unioned_events;
+    /*
+      If TRUE, at least one mysql_bin_log::write(Log_event e), where 
+      e.cache_stmt == TRUE call has been made after last 
+      mysql_bin_log.start_union_events() call.
+    */
+    bool unioned_events_trans;
+  } binlog_evt_union;
+  
   THD();
   ~THD();
 
@@ -1968,7 +1998,12 @@ class multi_delete :public select_result_interceptor
   ha_rows deleted, found;
   uint num_of_tables;
   int error;
-  bool do_delete, transactional_tables, normal_tables, delete_while_scanning;
+  bool do_delete;
+  /* True if at least one table we delete from is transactional */
+  bool transactional_tables;
+  /* True if at least one table we delete from is not transactional */
+  bool normal_tables;
+  bool delete_while_scanning;
 
 public:
   multi_delete(TABLE_LIST *dt, uint num_of_tables);
@@ -1995,7 +2030,10 @@ class multi_update :public select_result_interceptor
   uint table_count;
   Copy_field *copy_field;
   enum enum_duplicates handle_duplicates;
-  bool do_update, trans_safe, transactional_tables, ignore;
+  bool do_update, trans_safe;
+  /* True if the update operation has made a change in a transactional table */
+  bool transactional_tables;
+  bool ignore;
 
 public:
   multi_update(TABLE_LIST *ut, TABLE_LIST *leaves_list,