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WL#2486 - Natural/using join according to SQL:2003.

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Post-review fixes according to Monty's review.


sql/item.h:
  Unite all code that stores and restores the state of a name resolution context
  into a class to represent the state, and methods to save/restore that
  state.
sql/mysql_priv.h:
  Reorder parameters so that length is after the name of a field,
  and database is before table name.
sql/sql_acl.cc:
  Reorder parameters so that length is after the name of a field,
  and database is before table name.
sql/sql_base.cc:
  * Reorder parameters so that length is after the name of a field,
    and database is before table name.
  * Added new method - Field_iterator_table_ref::get_natural_column_ref
    to avoid unnecessary code when it is knwon that no new columns will
    be created when accessing natural join columns.
sql/sql_insert.cc:
  Unite all code that stores and restores the state of a name resolution context
  into a class to represent the state, and methods to save/restore that
  state.
sql/sql_lex.cc:
  Removed obsolete comment.
sql/sql_lex.h:
  Return error from push_contex() if there is no memory.
sql/sql_list.h:
  Extended base_list_iterator, List_iterator, and List_iterator_fast with an
  empty constructor, and init() methods, so that one doesn't have to construct
  a new iterator object every time one needs to iterate over a new list.
sql/sql_parse.cc:
  Moved common functionality from the parser into one function, and renamed
  the function to better reflect what it does.
sql/sql_yacc.yy:
  Moved common functionality from the parser into one function, and renamed
  the function to better reflect what it does.
sql/table.cc:
  * Extended base_list_iterator, List_iterator, and List_iterator_fast with an
    empty constructor, and init() methods, so that one doesn't have to construct
    a new iterator object every time one needs to iterate over a new list.
  * Added new method Field_iterator_table_ref::get_natural_column_ref to be
    used in cases when it is known for sure that no new columns should be
    created.
sql/table.h:
  - column_ref_it no longer allocated for each new list of columns
  - new method get_natural_join_column for faster/simpler access
    to natural join columns.
This commit is contained in:
unknown
2005-11-28 21:57:50 +02:00
parent 97bfd41fe1
commit 4fd41f7c0b
12 changed files with 189 additions and 183 deletions
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19
sql/sql_list.h
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@@ -266,10 +266,21 @@ protected:
ls.elements= elm;
}
public:
base_list_iterator(base_list &list_par)
:list(&list_par), el(&list_par.first), prev(0), current(0)
base_list_iterator()
:list(0), el(0), prev(0), current(0)
{}
base_list_iterator(base_list &list_par)
{ init(list_par); }
inline void init(base_list &list_par)
{
list= &list_par;
el= &list_par.first;
prev= 0;
current= 0;
}
inline void *next(void)
{
prev=el;
@@ -364,6 +375,8 @@ template <class T> class List_iterator :public base_list_iterator
{
public:
List_iterator(List<T> &a) : base_list_iterator(a) {}
List_iterator() : base_list_iterator() {}
inline void init(List<T> &a) { base_list_iterator::init(a); }
inline T* operator++(int) { return (T*) base_list_iterator::next(); }
inline T *replace(T *a) { return (T*) base_list_iterator::replace(a); }
inline T *replace(List<T> &a) { return (T*) base_list_iterator::replace(a); }
@@ -385,6 +398,8 @@ protected:
public:
inline List_iterator_fast(List<T> &a) : base_list_iterator(a) {}
inline List_iterator_fast() : base_list_iterator() {}
inline void init(List<T> &a) { base_list_iterator::init(a); }
inline T* operator++(int) { return (T*) base_list_iterator::next_fast(); }
inline void rewind(void) { base_list_iterator::rewind(); }
void sublist(List<T> &list_arg, uint el_arg)