removed old way to prevent using stack tables for caching Items in PS

fixed error code in union test


mysql-test/t/union.test:
  right code worr 4.1 error
sql/log_event.cc:
  assign non-cachable for Item status for all stack tables for safety
sql/repl_failsafe.cc:
  assign non-cachable for Item status for all stack tables for safety
sql/slave.cc:
  assign non-cachable for Item status for all stack tables for safety
sql/sql_acl.cc:
  assign non-cachable for Item status for all stack tables for safety
sql/sql_base.cc:
  assign non-cachable for Item status for all stack tables for safety
  non-cachable status processing
sql/sql_cache.cc:
  assign non-cachable for Item status for all stack tables for safety
sql/sql_class.cc:
  removed ald way to prevent using stack tables for caching Items in PS
sql/sql_class.h:
  removed old way to prevent using stack tables for caching Items in PS
sql/sql_help.cc:
  assign non-cachable for Item status for all stack tables for safety
sql/sql_insert.cc:
  assign non-cachable for Item status for all stack tables for safety
  removed old way to prevent using stack tables for caching Items in PS
sql/table.h:
  non-cachable for Item status for tables

1 files changed, 1 insertions, 0 deletions

diff --git a/sql/table.h b/sql/table.h
index 7761f610f21..0a4cd48c79e 100644
--- a/sql/table.h
+++ b/sql/table.h
@@ -193,6 +193,7 @@ typedef struct st_table_list
   bool          updating;               /* for replicate-do/ignore table */
   bool		force_index;		/* Prefer index over table scan */
   bool          ignore_leaves;          /* Preload only non-leaf nodes */
+  bool		non_cachable_table;	/* stop PS caching */
 } TABLE_LIST;
 
 typedef struct st_changed_table_list