PS fixed to be compatible with derived tables (BUG#2641)

sql/mysql_priv.h:
  description moved to be accessable from sql_class.h
sql/sql_base.cc:
  put all derived table preparation in temporary memory pull
sql/sql_class.h:
  close tables to close derived tables before freeing memory pool where they are placed
sql/sql_prepare.cc:
  now temporary memory pool for prrepared statements registration is oppened in open_and_lock_tables
  thd->current_statement set only for tables preparation, because we do not need memory pool tricks for PS executing
tests/client_test.c:
  derived table added to test
  expression with aggregate functions added to test

1 files changed, 2 insertions, 1 deletions

diff --git a/sql/mysql_priv.h b/sql/mysql_priv.h
index 3e76a32577c..73cc8b9ce03 100644
--- a/sql/mysql_priv.h
+++ b/sql/mysql_priv.h
@@ -350,6 +350,8 @@ typedef Comp_creator* (*chooser_compare_func_creator)(bool invert);
 /* sql_parse.cc */
 void free_items(Item *item);
 void cleanup_items(Item *item);
+class THD;
+void close_thread_tables(THD *thd, bool locked=0, bool skip_derived=0);
 #include "sql_class.h"
 #include "opt_range.h"
 
@@ -687,7 +689,6 @@ bool rm_temporary_table(enum db_type base, char *path);
 void free_io_cache(TABLE *entry);
 void intern_close_table(TABLE *entry);
 bool close_thread_table(THD *thd, TABLE **table_ptr);
-void close_thread_tables(THD *thd, bool locked=0, bool skip_derived=0);
 void close_temporary_tables(THD *thd);
 TABLE_LIST * find_table_in_list(TABLE_LIST *table,
 				const char *db_name, const char *table_name);