calloc replaced with alloc in st_select_lex_node 'new' operator (SCRUM?)

sql/sql_lex.cc:
  initialization of all need field
sql/sql_lex.h:
  calloc replaced with alloc
sql/sql_parse.cc:
  no need full initialization here
sql/sql_yacc.yy:
  removed initialization which will be done in init_qiery method

sql/sql_lex.cc

@@ -999,6 +999,8 @@ int yylex(void *arg, void *yythd)
 
 void st_select_lex_node::init_query()
 {
+  options= 0;
+  linkage= UNSPECIFIED_TYPE;
   no_table_names_allowed= uncacheable= dependent= 0;
   ref_pointer_array= 0;
 }
@@ -1016,8 +1018,8 @@ void st_select_lex_node::init_select()
 
 void st_select_lex_unit::init_query()
 {
-  linkage= GLOBAL_OPTIONS_TYPE;
   st_select_lex_node::init_query();
+  linkage= GLOBAL_OPTIONS_TYPE;
   global_parameters= this;
   select_limit_cnt= HA_POS_ERROR;
   offset_limit_cnt= 0;
@@ -1031,11 +1033,10 @@ void st_select_lex_unit::init_query()
 void st_select_lex::init_query()
 {
   st_select_lex_node::init_query();
-  table_list.elements= 0;
-  table_list.first= 0; 
-  table_list.next= (byte**) &table_list.first;
+  table_list.empty();
   item_list.empty();
   join= 0;
+  where= 0;
   olap= UNSPECIFIED_OLAP_TYPE;
   having_fix_field= 0;
   with_wild= 0;
@@ -1044,11 +1045,15 @@ void st_select_lex::init_query()
 void st_select_lex::init_select()
 {
   st_select_lex_node::init_select();
-  group_list.elements= 0;
-  group_list.first= 0;
-  group_list.next= (byte**) &group_list.first;
+  group_list.empty();
+  type= db= db1= table1= db2= table2= 0;
+  having= 0;
+  group_list.empty();
+  use_index_ptr= ignore_index_ptr= 0;
+  table_join_options= 0;
+  in_sum_expr= with_wild= 0;
   options= 0;
-  where= having= 0;
+  braces= 0;
   when_list.empty(); 
   expr_list.empty();
   interval_list.empty(); 

sql/sql_lex.h

@@ -221,8 +221,7 @@ class st_select_lex_node {
 
   static void *operator new(size_t size)
   {
-    // TODO: Change to alloc() and explicitely clear elements in constructors
-    return (void*) sql_calloc((uint) size);
+    return (void*) sql_alloc((uint) size);
   }
   static void operator delete(void *ptr,size_t size) {}
   st_select_lex_node(): linkage(UNSPECIFIED_TYPE) {}

sql/sql_parse.cc

@@ -3316,7 +3316,7 @@ void mysql_init_multi_delete(LEX *lex)
   lex->select_lex.select_limit= lex->unit.select_limit_cnt=
     HA_POS_ERROR;
   lex->auxilliary_table_list= lex->select_lex.table_list;
-  lex->select_lex.init_query();
+  lex->select_lex.table_list.empty();
 }
 
 

sql/sql_yacc.yy

@@ -3361,7 +3361,6 @@ delete:
 	{
 	  LEX *lex= Lex;
 	  lex->sql_command= SQLCOM_DELETE;
-	  lex->select_lex.options= 0;
 	  lex->lock_option= lex->thd->update_lock_default;
 	  lex->select_lex.init_order();
 	}