|
851
by Brian Aker
Class rewrite of Session (aka get all of the junk out) |
1 |
/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
|
2 |
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
|
|
3 |
*
|
|
4 |
* Copyright (C) 2008 Sun Microsystems
|
|
5 |
*
|
|
6 |
* This program is free software; you can redistribute it and/or modify
|
|
7 |
* it under the terms of the GNU General Public License as published by
|
|
8 |
* the Free Software Foundation; version 2 of the License.
|
|
9 |
*
|
|
10 |
* This program is distributed in the hope that it will be useful,
|
|
11 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
12 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
13 |
* GNU General Public License for more details.
|
|
14 |
*
|
|
15 |
* You should have received a copy of the GNU General Public License
|
|
16 |
* along with this program; if not, write to the Free Software
|
|
17 |
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
18 |
*/
|
|
19 |
||
20 |
||
21 |
#ifndef DRIZZLED_TMP_TABLE_PARAM_H
|
|
22 |
#define DRIZZLED_TMP_TABLE_PARAM_H
|
|
23 |
||
24 |
/*
|
|
25 |
Param to create temporary tables when doing SELECT:s
|
|
26 |
NOTE
|
|
27 |
This structure is copied using memcpy as a part of JOIN.
|
|
28 |
*/
|
|
29 |
||
30 |
class Tmp_Table_Param :public Sql_alloc |
|
31 |
{
|
|
32 |
private: |
|
33 |
/* Prevent use of these (not safe because of lists and copy_field) */
|
|
34 |
Tmp_Table_Param(const Tmp_Table_Param &); |
|
35 |
void operator=(Tmp_Table_Param &); |
|
36 |
||
37 |
public: |
|
38 |
List<Item> copy_funcs; |
|
39 |
List<Item> save_copy_funcs; |
|
40 |
Copy_field *copy_field, *copy_field_end; |
|
41 |
Copy_field *save_copy_field, *save_copy_field_end; |
|
42 |
unsigned char *group_buff; |
|
43 |
Item **items_to_copy; /* Fields in tmp table */ |
|
44 |
MI_COLUMNDEF *recinfo,*start_recinfo; |
|
45 |
KEY *keyinfo; |
|
46 |
ha_rows end_write_records; |
|
47 |
uint field_count,sum_func_count,func_count; |
|
48 |
uint32_t hidden_field_count; |
|
49 |
uint group_parts,group_length,group_null_parts; |
|
50 |
uint quick_group; |
|
51 |
bool using_indirect_summary_function; |
|
52 |
/* If >0 convert all blob fields to varchar(convert_blob_length) */
|
|
53 |
uint32_t convert_blob_length; |
|
54 |
const CHARSET_INFO *table_charset; |
|
55 |
bool schema_table; |
|
56 |
/*
|
|
57 |
True if GROUP BY and its aggregate functions are already computed
|
|
58 |
by a table access method (e.g. by loose index scan). In this case
|
|
59 |
query execution should not perform aggregation and should treat
|
|
60 |
aggregate functions as normal functions.
|
|
61 |
*/
|
|
62 |
bool precomputed_group_by; |
|
63 |
bool force_copy_fields; |
|
64 |
/*
|
|
65 |
If true, create_tmp_field called from create_tmp_table will convert
|
|
66 |
all BIT fields to 64-bit longs. This is a workaround the limitation
|
|
67 |
that MEMORY tables cannot index BIT columns.
|
|
68 |
*/
|
|
69 |
bool bit_fields_as_long; |
|
70 |
||
71 |
Tmp_Table_Param() |
|
72 |
:copy_field(0), group_parts(0), |
|
73 |
group_length(0), group_null_parts(0), convert_blob_length(0), |
|
74 |
schema_table(0), precomputed_group_by(0), force_copy_fields(0), |
|
75 |
bit_fields_as_long(0) |
|
76 |
{}
|
|
77 |
~Tmp_Table_Param() |
|
78 |
{
|
|
79 |
cleanup(); |
|
80 |
}
|
|
81 |
void init(void); |
|
82 |
void cleanup(void); |
|
83 |
};
|
|
84 |
||
85 |
#endif /* DRIZZLED_TMP_TABLE_PARAM_H */ |