Manual merge from mysql-trunk-merge.

Conflicts:
  - configure.in
  - include/m_string.h
  - mysql-test/extra/rpl_tests/rpl_row_func003.test
  - mysql-test/r/mysqlbinlog.result
  - mysql-test/r/union.result
  - mysql-test/suite/binlog/r/binlog_killed_simulate.result
  - mysql-test/suite/binlog/r/binlog_row_mix_innodb_myisam.result
  - mysql-test/suite/binlog/r/binlog_unsafe.result
  - mysql-test/suite/binlog/t/binlog_unsafe.test
  - mysql-test/suite/rpl/r/rpl_loaddata_fatal.result
  - mysql-test/suite/rpl/r/rpl_loaddata_map.result
  - mysql-test/suite/rpl/r/rpl_stm_loaddata_concurrent.result
  - mysql-test/suite/rpl/r/rpl_stm_log.result
  - mysql-test/suite/rpl/t/rpl_optimize.test
  - mysql-test/t/mysqlbinlog.test
  - mysql-test/t/union.test
  - sql/rpl_utility.h
  - sql/sql_union.cc
  - strings/Makefile.am

1 files changed, 24 insertions, 0 deletions

diff --git a/sql/item.h b/sql/item.h
index 4dc65c52843..b7e6cc6c204 100644
--- a/sql/item.h
+++ b/sql/item.h
@@ -514,6 +514,13 @@ public:
   char * name;			/* Name from select */
   /* Original item name (if it was renamed)*/
   char * orig_name;
+  /**
+     Intrusive list pointer for free list. If not null, points to the next
+     Item on some Query_arena's free list. For instance, stored procedures
+     have their own Query_arena's.
+
+     @see Query_arena::free_list
+   */
   Item *next;
   uint32 max_length;
   uint name_length;                     /* Length of name */
@@ -987,6 +994,23 @@ public:
     return FALSE;
   }
 
+  /**
+    Find a function of a given type
+
+    @param   arg     the function type to search (enum Item_func::Functype)
+    @return
+      @retval TRUE   the function type we're searching for is found
+      @retval FALSE  the function type wasn't found
+
+    @description
+      This function can be used (together with Item::walk()) to find functions
+      in an item tree fragment.
+  */
+  virtual bool find_function_processor (uchar *arg)
+  {
+    return FALSE;
+  }
+
   /*
     For SP local variable returns pointer to Item representing its
     current value and pointer to current Item otherwise.