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Initial patch for the implementation of window functions (MDEV-6115):

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- All parsing problems look like resolved
- Stub performing name resolution of window functions
in simplest queries has been added.
This commit is contained in:
Igor Babaev
2016-02-12 20:33:56 -08:00
parent 2cfc450bf7
commit 9d9c60fb12
15 changed files with 768 additions and 6 deletions
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47
sql/sql_parse.cc
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@@ -7816,6 +7816,53 @@ TABLE_LIST *st_select_lex::convert_right_join()
DBUG_RETURN(tab1);
}
void st_select_lex::prepare_add_window_spec(THD *thd)
{
LEX *lex= thd->lex;
lex->save_group_list= group_list;
lex->save_order_list= order_list;
lex->win_ref= NULL;
lex->win_frame= NULL;
lex->frame_top_bound= NULL;
lex->frame_bottom_bound= NULL;
group_list.empty();
order_list.empty();
}
bool st_select_lex::add_window_def(THD *thd,
LEX_STRING *win_name,
LEX_STRING *win_ref,
SQL_I_List<ORDER> win_partition_list,
SQL_I_List<ORDER> win_order_list,
Window_frame *win_frame)
{
Window_def *win_def= new (thd->mem_root) Window_def(win_name,
win_ref,
win_partition_list,
win_order_list,
win_frame);
group_list= thd->lex->save_group_list;
order_list= thd->lex->save_order_list;
return (win_def == NULL || window_specs.push_back(win_def));
}
bool st_select_lex::add_window_spec(THD *thd,
LEX_STRING *win_ref,
SQL_I_List<ORDER> win_partition_list,
SQL_I_List<ORDER> win_order_list,
Window_frame *win_frame)
{
Window_spec *win_spec= new (thd->mem_root) Window_spec(win_ref,
win_partition_list,
win_order_list,
win_frame);
group_list= thd->lex->save_group_list;
order_list= thd->lex->save_order_list;
thd->lex->win_spec= win_spec;
return (win_spec == NULL || window_specs.push_back(win_spec));
}
/**
Set lock for all tables in current select level.