1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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*
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1999.6.1
by kalebral at gmail
update Copyright strings to a more common format to help with creating the master debian copyright file |
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* Copyright (C) 2008-2009 Sun Microsystems, Inc.
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1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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||
2173.2.1
by Monty Taylor
Fixes incorrect usage of include |
20 |
#include <config.h> |
21 |
#include <drizzled/optimizer/range.h> |
|
22 |
#include <drizzled/optimizer/range_param.h> |
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23 |
#include <drizzled/optimizer/sel_arg.h> |
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24 |
#include <drizzled/util/test.h> |
|
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
25 |
|
1280.1.10
by Monty Taylor
Put everything in drizzled into drizzled namespace. |
26 |
namespace drizzled |
27 |
{
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|
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
28 |
|
29 |
/* Functions to fix up the tree after insert and delete */
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30 |
static void left_rotate(optimizer::SEL_ARG **root, optimizer::SEL_ARG *leaf) |
|
31 |
{
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optimizer::SEL_ARG *y= leaf->right; |
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33 |
leaf->right= y->left; |
|
34 |
if (y->left != &optimizer::null_element) |
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35 |
y->left->parent= leaf; |
|
36 |
if (! (y->parent=leaf->parent)) |
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37 |
*root= y; |
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38 |
else
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39 |
*leaf->parent_ptr()= y; |
|
40 |
y->left= leaf; |
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41 |
leaf->parent= y; |
|
42 |
}
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43 |
||
44 |
||
45 |
static void right_rotate(optimizer::SEL_ARG **root, optimizer::SEL_ARG *leaf) |
|
46 |
{
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optimizer::SEL_ARG *y= leaf->left; |
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48 |
leaf->left= y->right; |
|
49 |
if (y->right != &optimizer::null_element) |
|
50 |
y->right->parent= leaf; |
|
51 |
if (! (y->parent=leaf->parent)) |
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52 |
*root= y; |
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53 |
else
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*leaf->parent_ptr()= y; |
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55 |
y->right= leaf; |
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56 |
leaf->parent= y; |
|
57 |
}
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58 |
||
59 |
||
60 |
/* Get overlapping range */
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61 |
optimizer::SEL_ARG *optimizer::SEL_ARG::clone_and(optimizer::SEL_ARG *arg) |
|
1240.3.1
by Brian Aker
Merge Padraig. |
62 |
{
|
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
63 |
unsigned char *new_min= NULL; |
64 |
unsigned char *new_max= NULL; |
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65 |
uint8_t flag_min= 0; |
|
66 |
uint8_t flag_max= 0; |
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67 |
||
68 |
if (cmp_min_to_min(arg) >= 0) |
|
69 |
{
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new_min= min_value; |
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71 |
flag_min= min_flag; |
|
72 |
}
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73 |
else
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{
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75 |
new_min=arg->min_value; flag_min=arg->min_flag; |
|
76 |
}
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|
77 |
if (cmp_max_to_max(arg) <= 0) |
|
78 |
{
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1240.3.1
by Brian Aker
Merge Padraig. |
79 |
new_max= max_value; |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
80 |
flag_max= max_flag; |
81 |
}
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|
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else
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{
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1240.3.1
by Brian Aker
Merge Padraig. |
84 |
new_max= arg->max_value; |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
85 |
flag_max= arg->max_flag; |
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}
|
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1240.3.1
by Brian Aker
Merge Padraig. |
87 |
return (new SEL_ARG(field, |
88 |
part, |
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new_min, |
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90 |
new_max, |
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flag_min, |
|
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
92 |
flag_max, |
93 |
test(maybe_flag && arg->maybe_flag))); |
|
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}
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95 |
||
96 |
||
97 |
/* min <= X , arg->min */
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optimizer::SEL_ARG *optimizer::SEL_ARG::clone_first(optimizer::SEL_ARG *arg) |
|
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{
|
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1240.3.1
by Brian Aker
Merge Padraig. |
100 |
return (new SEL_ARG(field,part, |
101 |
min_value, |
|
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
102 |
arg->min_value, |
1240.3.1
by Brian Aker
Merge Padraig. |
103 |
min_flag, |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
104 |
arg->min_flag & NEAR_MIN ? 0 : NEAR_MAX, |
105 |
maybe_flag | arg->maybe_flag)); |
|
106 |
}
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107 |
||
108 |
||
109 |
/* min <= X <= key_max */
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optimizer::SEL_ARG *optimizer::SEL_ARG::clone_last(optimizer::SEL_ARG *arg) |
|
111 |
{
|
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1240.3.1
by Brian Aker
Merge Padraig. |
112 |
return (new SEL_ARG(field, |
113 |
part, |
|
114 |
min_value, |
|
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
115 |
arg->max_value, |
1240.3.1
by Brian Aker
Merge Padraig. |
116 |
min_flag, |
117 |
arg->max_flag, |
|
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
118 |
maybe_flag | arg->maybe_flag)); |
119 |
}
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120 |
||
121 |
||
122 |
/* Get overlapping range */
|
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123 |
bool optimizer::SEL_ARG::copy_min(optimizer::SEL_ARG *arg) |
|
124 |
{
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125 |
if (cmp_min_to_min(arg) > 0) |
|
126 |
{
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127 |
min_value= arg->min_value; |
|
128 |
min_flag=arg->min_flag; |
|
129 |
if ((max_flag & (NO_MAX_RANGE | NO_MIN_RANGE)) == |
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130 |
(NO_MAX_RANGE | NO_MIN_RANGE)) |
|
131 |
{
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132 |
return 1; // Full range |
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133 |
}
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|
134 |
}
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135 |
maybe_flag|= arg->maybe_flag; |
|
136 |
return 0; |
|
137 |
}
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138 |
||
139 |
/* Get overlapping range */
|
|
140 |
bool optimizer::SEL_ARG::copy_max(optimizer::SEL_ARG *arg) |
|
141 |
{
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142 |
if (cmp_max_to_max(arg) <= 0) |
|
143 |
{
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144 |
max_value= arg->max_value; |
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145 |
max_flag= arg->max_flag; |
|
146 |
if ((max_flag & (NO_MAX_RANGE | NO_MIN_RANGE)) == |
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147 |
(NO_MAX_RANGE | NO_MIN_RANGE)) |
|
148 |
{
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149 |
return 1; // Full range |
|
150 |
}
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151 |
}
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152 |
maybe_flag|= arg->maybe_flag; |
|
153 |
return 0; |
|
154 |
}
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155 |
||
156 |
void optimizer::SEL_ARG::copy_min_to_min(optimizer::SEL_ARG *arg) |
|
157 |
{
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158 |
min_value= arg->min_value; |
|
159 |
min_flag= arg->min_flag; |
|
160 |
}
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161 |
||
162 |
||
163 |
void optimizer::SEL_ARG::copy_min_to_max(optimizer::SEL_ARG *arg) |
|
164 |
{
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165 |
max_value= arg->min_value; |
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166 |
max_flag= arg->min_flag & NEAR_MIN ? 0 : NEAR_MAX; |
|
167 |
}
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168 |
||
169 |
void optimizer::SEL_ARG::copy_max_to_min(optimizer::SEL_ARG *arg) |
|
170 |
{
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171 |
min_value= arg->max_value; |
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172 |
min_flag= arg->max_flag & NEAR_MAX ? 0 : NEAR_MIN; |
|
173 |
}
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174 |
||
175 |
||
176 |
int optimizer::SEL_ARG::store_min(uint32_t length, unsigned char **min_key, uint32_t min_key_flag) |
|
177 |
{
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/* "(kp1 > c1) AND (kp2 OP c2) AND ..." -> (kp1 > c1) */
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179 |
if ((! (min_flag & NO_MIN_RANGE) && |
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180 |
! (min_key_flag & (NO_MIN_RANGE | NEAR_MIN)))) |
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181 |
{
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182 |
if (maybe_null && *min_value) |
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183 |
{
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**min_key= 1; |
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memset(*min_key+1, 0, length-1); |
|
186 |
}
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187 |
else
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{
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memcpy(*min_key,min_value,length); |
|
190 |
}
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(*min_key)+= length; |
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192 |
return 1; |
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}
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194 |
return 0; |
|
195 |
}
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196 |
||
197 |
||
198 |
int optimizer::SEL_ARG::store_max(uint32_t length, unsigned char **max_key, uint32_t max_key_flag) |
|
199 |
{
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200 |
if (! (max_flag & NO_MAX_RANGE) && |
|
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! (max_key_flag & (NO_MAX_RANGE | NEAR_MAX))) |
|
202 |
{
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203 |
if (maybe_null && *max_value) |
|
204 |
{
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**max_key= 1; |
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memset(*max_key + 1, 0, length-1); |
|
207 |
}
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else
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209 |
{
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210 |
memcpy(*max_key,max_value,length); |
|
211 |
}
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(*max_key)+= length; |
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213 |
return 1; |
|
214 |
}
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215 |
return 0; |
|
216 |
}
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217 |
||
218 |
||
219 |
int optimizer::SEL_ARG::store_min_key(KEY_PART *key, unsigned char **range_key, uint32_t *range_key_flag) |
|
220 |
{
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221 |
optimizer::SEL_ARG *key_tree= first(); |
|
222 |
uint32_t res= key_tree->store_min(key[key_tree->part].store_length, |
|
1240.3.1
by Brian Aker
Merge Padraig. |
223 |
range_key, |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
224 |
*range_key_flag); |
225 |
*range_key_flag|= key_tree->min_flag; |
|
226 |
||
227 |
if (key_tree->next_key_part && |
|
228 |
key_tree->next_key_part->part == key_tree->part+1 && |
|
229 |
! (*range_key_flag & (NO_MIN_RANGE | NEAR_MIN)) && |
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230 |
key_tree->next_key_part->type == optimizer::SEL_ARG::KEY_RANGE) |
|
231 |
{
|
|
1240.3.1
by Brian Aker
Merge Padraig. |
232 |
res+= key_tree->next_key_part->store_min_key(key, |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
233 |
range_key, |
234 |
range_key_flag); |
|
235 |
}
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236 |
return res; |
|
237 |
}
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238 |
||
239 |
int optimizer::SEL_ARG::store_max_key(KEY_PART *key, unsigned char **range_key, uint32_t *range_key_flag) |
|
240 |
{
|
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241 |
SEL_ARG *key_tree= last(); |
|
242 |
uint32_t res= key_tree->store_max(key[key_tree->part].store_length, |
|
1240.3.1
by Brian Aker
Merge Padraig. |
243 |
range_key, |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
244 |
*range_key_flag); |
245 |
(*range_key_flag)|= key_tree->max_flag; |
|
246 |
if (key_tree->next_key_part && |
|
247 |
key_tree->next_key_part->part == key_tree->part+1 && |
|
248 |
! (*range_key_flag & (NO_MAX_RANGE | NEAR_MAX)) && |
|
249 |
key_tree->next_key_part->type == SEL_ARG::KEY_RANGE) |
|
1240.3.1
by Brian Aker
Merge Padraig. |
250 |
res+= key_tree->next_key_part->store_max_key(key, |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
251 |
range_key, |
252 |
range_key_flag); |
|
253 |
return res; |
|
254 |
}
|
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255 |
||
256 |
optimizer::SEL_ARG::SEL_ARG(optimizer::SEL_ARG &arg) |
|
257 |
:
|
|
1280.1.10
by Monty Taylor
Put everything in drizzled into drizzled namespace. |
258 |
memory::SqlAlloc() |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
259 |
{
|
260 |
type= arg.type; |
|
261 |
min_flag= arg.min_flag; |
|
262 |
max_flag= arg.max_flag; |
|
263 |
maybe_flag= arg.maybe_flag; |
|
264 |
maybe_null= arg.maybe_null; |
|
265 |
part= arg.part; |
|
266 |
field= arg.field; |
|
267 |
min_value= arg.min_value; |
|
268 |
max_value= arg.max_value; |
|
269 |
next_key_part= arg.next_key_part; |
|
1240.3.1
by Brian Aker
Merge Padraig. |
270 |
use_count=1; |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
271 |
elements=1; |
272 |
}
|
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273 |
||
274 |
||
275 |
void optimizer::SEL_ARG::make_root() |
|
276 |
{
|
|
277 |
left= right= &optimizer::null_element; |
|
278 |
color= BLACK; |
|
279 |
next= prev =0; |
|
1240.3.1
by Brian Aker
Merge Padraig. |
280 |
use_count= 0; |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
281 |
elements= 1; |
282 |
}
|
|
283 |
||
284 |
optimizer::SEL_ARG::SEL_ARG(Field *f, |
|
285 |
const unsigned char *min_value_arg, |
|
286 |
const unsigned char *max_value_arg) |
|
287 |
:
|
|
1240.3.1
by Brian Aker
Merge Padraig. |
288 |
min_flag(0), |
289 |
max_flag(0), |
|
290 |
maybe_flag(0), |
|
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
291 |
maybe_null(f->real_maybe_null()), |
1240.3.1
by Brian Aker
Merge Padraig. |
292 |
elements(1), |
293 |
use_count(1), |
|
294 |
field(f), |
|
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
295 |
min_value((unsigned char*) min_value_arg), |
1240.3.1
by Brian Aker
Merge Padraig. |
296 |
max_value((unsigned char*) max_value_arg), |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
297 |
next(0), |
298 |
prev(0), |
|
299 |
next_key_part(0), |
|
300 |
color(BLACK), |
|
301 |
type(KEY_RANGE) |
|
302 |
{
|
|
303 |
left= right= &optimizer::null_element; |
|
304 |
}
|
|
305 |
||
306 |
optimizer::SEL_ARG::SEL_ARG(Field *field_, |
|
307 |
uint8_t part_, |
|
1240.3.1
by Brian Aker
Merge Padraig. |
308 |
unsigned char *min_value_, |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
309 |
unsigned char *max_value_, |
310 |
uint8_t min_flag_, |
|
311 |
uint8_t max_flag_, |
|
312 |
uint8_t maybe_flag_) |
|
313 |
:
|
|
314 |
min_flag(min_flag_), |
|
315 |
max_flag(max_flag_), |
|
316 |
maybe_flag(maybe_flag_), |
|
317 |
part(part_), |
|
1240.3.1
by Brian Aker
Merge Padraig. |
318 |
maybe_null(field_->real_maybe_null()), |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
319 |
elements(1), |
320 |
use_count(1), |
|
1240.3.1
by Brian Aker
Merge Padraig. |
321 |
field(field_), |
322 |
min_value(min_value_), |
|
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
323 |
max_value(max_value_), |
324 |
next(0), |
|
325 |
prev(0), |
|
326 |
next_key_part(0), |
|
327 |
color(BLACK), |
|
328 |
type(KEY_RANGE) |
|
329 |
{
|
|
330 |
left= right= &optimizer::null_element; |
|
331 |
}
|
|
332 |
||
1240.3.1
by Brian Aker
Merge Padraig. |
333 |
optimizer::SEL_ARG *optimizer::SEL_ARG::clone(RangeParameter *param, |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
334 |
optimizer::SEL_ARG *new_parent, |
335 |
optimizer::SEL_ARG **next_arg) |
|
336 |
{
|
|
337 |
optimizer::SEL_ARG *tmp= NULL; |
|
338 |
||
339 |
/* Bail out if we have already generated too many SEL_ARGs */
|
|
340 |
if (++param->alloced_sel_args > MAX_SEL_ARGS) |
|
341 |
return 0; |
|
342 |
||
343 |
if (type != KEY_RANGE) |
|
344 |
{
|
|
345 |
if (! (tmp= new (param->mem_root) optimizer::SEL_ARG(type))) |
|
346 |
return 0; // out of memory |
|
347 |
tmp->prev= *next_arg; // Link into next/prev chain |
|
348 |
(*next_arg)->next= tmp; |
|
349 |
(*next_arg)= tmp; |
|
350 |
}
|
|
351 |
else
|
|
352 |
{
|
|
353 |
if (! (tmp= new (param->mem_root) optimizer::SEL_ARG(field, |
|
1240.3.1
by Brian Aker
Merge Padraig. |
354 |
part, |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
355 |
min_value, |
356 |
max_value, |
|
1240.3.1
by Brian Aker
Merge Padraig. |
357 |
min_flag, |
358 |
max_flag, |
|
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
359 |
maybe_flag))) |
360 |
return 0; // OOM |
|
361 |
tmp->parent= new_parent; |
|
362 |
tmp->next_key_part= next_key_part; |
|
363 |
if (left != &optimizer::null_element) |
|
364 |
if (! (tmp->left= left->clone(param, tmp, next_arg))) |
|
365 |
return 0; // OOM |
|
366 |
||
367 |
tmp->prev= *next_arg; // Link into next/prev chain |
|
368 |
(*next_arg)->next= tmp; |
|
369 |
(*next_arg)= tmp; |
|
370 |
||
371 |
if (right != &optimizer::null_element) |
|
372 |
if (! (tmp->right= right->clone(param, tmp, next_arg))) |
|
373 |
return 0; // OOM |
|
374 |
}
|
|
375 |
increment_use_count(1); |
|
376 |
tmp->color= color; |
|
377 |
tmp->elements= this->elements; |
|
378 |
return tmp; |
|
379 |
}
|
|
380 |
||
381 |
optimizer::SEL_ARG *optimizer::SEL_ARG::first() |
|
382 |
{
|
|
383 |
optimizer::SEL_ARG *next_arg= this; |
|
384 |
if (! next_arg->left) |
|
385 |
return 0; // MAYBE_KEY |
|
386 |
while (next_arg->left != &optimizer::null_element) |
|
387 |
next_arg= next_arg->left; |
|
388 |
return next_arg; |
|
389 |
}
|
|
390 |
||
391 |
optimizer::SEL_ARG *optimizer::SEL_ARG::last() |
|
392 |
{
|
|
393 |
SEL_ARG *next_arg= this; |
|
394 |
if (! next_arg->right) |
|
395 |
return 0; // MAYBE_KEY |
|
396 |
while (next_arg->right != &optimizer::null_element) |
|
397 |
next_arg=next_arg->right; |
|
398 |
return next_arg; |
|
399 |
}
|
|
400 |
||
401 |
||
1237.13.7
by Padraig O'Sullivan
Renamed PARAM to Parameter and RANGE_OPT_PARAM to RangeParameter. |
402 |
optimizer::SEL_ARG *optimizer::SEL_ARG::clone_tree(RangeParameter *param) |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
403 |
{
|
404 |
optimizer::SEL_ARG tmp_link; |
|
405 |
optimizer::SEL_ARG*next_arg= NULL; |
|
406 |
optimizer::SEL_ARG *root= NULL; |
|
407 |
next_arg= &tmp_link; |
|
408 |
if (! (root= clone(param, (SEL_ARG *) 0, &next_arg))) |
|
409 |
return 0; |
|
410 |
next_arg->next= 0; // Fix last link |
|
411 |
tmp_link.next->prev= 0; // Fix first link |
|
412 |
if (root) // If not OOM |
|
413 |
root->use_count= 0; |
|
414 |
return root; |
|
415 |
}
|
|
416 |
||
417 |
||
418 |
optimizer::SEL_ARG * |
|
419 |
optimizer::SEL_ARG::insert(optimizer::SEL_ARG *key) |
|
420 |
{
|
|
421 |
optimizer::SEL_ARG *element= NULL; |
|
422 |
optimizer::SEL_ARG **par= NULL; |
|
423 |
optimizer::SEL_ARG *last_element= NULL; |
|
424 |
||
425 |
for (element= this; element != &optimizer::null_element; ) |
|
426 |
{
|
|
427 |
last_element= element; |
|
428 |
if (key->cmp_min_to_min(element) > 0) |
|
429 |
{
|
|
430 |
par= &element->right; element= element->right; |
|
431 |
}
|
|
432 |
else
|
|
433 |
{
|
|
434 |
par= &element->left; element= element->left; |
|
435 |
}
|
|
436 |
}
|
|
437 |
*par= key; |
|
438 |
key->parent= last_element; |
|
439 |
/* Link in list */
|
|
440 |
if (par == &last_element->left) |
|
441 |
{
|
|
442 |
key->next= last_element; |
|
443 |
if ((key->prev=last_element->prev)) |
|
444 |
key->prev->next= key; |
|
445 |
last_element->prev= key; |
|
446 |
}
|
|
447 |
else
|
|
448 |
{
|
|
449 |
if ((key->next= last_element->next)) |
|
450 |
key->next->prev= key; |
|
451 |
key->prev= last_element; |
|
452 |
last_element->next= key; |
|
453 |
}
|
|
454 |
key->left= key->right= &optimizer::null_element; |
|
455 |
optimizer::SEL_ARG *root= rb_insert(key); // rebalance tree |
|
456 |
root->use_count= this->use_count; // copy root info |
|
457 |
root->elements= this->elements+1; |
|
458 |
root->maybe_flag= this->maybe_flag; |
|
459 |
return root; |
|
460 |
}
|
|
461 |
||
462 |
||
463 |
/*
|
|
464 |
** Find best key with min <= given key
|
|
465 |
** Because the call context this should never return 0 to get_range
|
|
466 |
*/
|
|
467 |
optimizer::SEL_ARG * |
|
468 |
optimizer::SEL_ARG::find_range(optimizer::SEL_ARG *key) |
|
469 |
{
|
|
470 |
optimizer::SEL_ARG *element= this; |
|
471 |
optimizer::SEL_ARG *found= NULL; |
|
472 |
||
473 |
for (;;) |
|
474 |
{
|
|
475 |
if (element == &optimizer::null_element) |
|
476 |
return found; |
|
477 |
int cmp= element->cmp_min_to_min(key); |
|
478 |
if (cmp == 0) |
|
479 |
return element; |
|
480 |
if (cmp < 0) |
|
481 |
{
|
|
482 |
found= element; |
|
483 |
element= element->right; |
|
484 |
}
|
|
485 |
else
|
|
486 |
element= element->left; |
|
487 |
}
|
|
488 |
}
|
|
489 |
||
490 |
||
491 |
/*
|
|
492 |
Remove a element from the tree
|
|
493 |
||
494 |
SYNOPSIS
|
|
495 |
tree_delete()
|
|
496 |
key Key that is to be deleted from tree (this)
|
|
497 |
||
498 |
NOTE
|
|
499 |
This also frees all sub trees that is used by the element
|
|
500 |
||
501 |
RETURN
|
|
502 |
root of new tree (with key deleted)
|
|
503 |
*/
|
|
504 |
optimizer::SEL_ARG * |
|
505 |
optimizer::SEL_ARG::tree_delete(optimizer::SEL_ARG *key) |
|
506 |
{
|
|
507 |
enum leaf_color remove_color; |
|
508 |
optimizer::SEL_ARG *root= NULL; |
|
509 |
optimizer::SEL_ARG *nod= NULL; |
|
510 |
optimizer::SEL_ARG **par= NULL; |
|
511 |
optimizer::SEL_ARG *fix_par= NULL; |
|
512 |
||
513 |
root= this; |
|
514 |
this->parent= 0; |
|
515 |
||
516 |
/* Unlink from list */
|
|
517 |
if (key->prev) |
|
518 |
key->prev->next= key->next; |
|
519 |
if (key->next) |
|
520 |
key->next->prev= key->prev; |
|
521 |
key->increment_use_count(-1); |
|
522 |
if (! key->parent) |
|
523 |
par= &root; |
|
524 |
else
|
|
525 |
par= key->parent_ptr(); |
|
526 |
||
527 |
if (key->left == &optimizer::null_element) |
|
528 |
{
|
|
529 |
*par= nod= key->right; |
|
530 |
fix_par= key->parent; |
|
531 |
if (nod != &optimizer::null_element) |
|
532 |
nod->parent= fix_par; |
|
533 |
remove_color= key->color; |
|
534 |
}
|
|
535 |
else if (key->right == &optimizer::null_element) |
|
536 |
{
|
|
537 |
*par= nod= key->left; |
|
538 |
nod->parent= fix_par= key->parent; |
|
539 |
remove_color= key->color; |
|
540 |
}
|
|
541 |
else
|
|
542 |
{
|
|
543 |
optimizer::SEL_ARG *tmp= key->next; // next bigger key (exist!) |
|
544 |
nod= *tmp->parent_ptr()= tmp->right; // unlink tmp from tree |
|
545 |
fix_par= tmp->parent; |
|
546 |
if (nod != &optimizer::null_element) |
|
547 |
nod->parent= fix_par; |
|
548 |
remove_color= tmp->color; |
|
549 |
||
550 |
tmp->parent= key->parent; // Move node in place of key |
|
551 |
(tmp->left= key->left)->parent= tmp; |
|
552 |
if ((tmp->right=key->right) != &optimizer::null_element) |
|
553 |
tmp->right->parent= tmp; |
|
554 |
tmp->color= key->color; |
|
555 |
*par= tmp; |
|
556 |
if (fix_par == key) // key->right == key->next |
|
557 |
fix_par= tmp; // new parent of nod |
|
558 |
}
|
|
559 |
||
560 |
if (root == &optimizer::null_element) |
|
561 |
return 0; // Maybe root later |
|
562 |
if (remove_color == BLACK) |
|
563 |
root= rb_delete_fixup(root, nod, fix_par); |
|
564 |
||
565 |
root->use_count= this->use_count; // Fix root counters |
|
566 |
root->elements= this->elements-1; |
|
567 |
root->maybe_flag= this->maybe_flag; |
|
568 |
return root; |
|
569 |
}
|
|
570 |
||
571 |
||
572 |
optimizer::SEL_ARG * |
|
573 |
optimizer::SEL_ARG::rb_insert(optimizer::SEL_ARG *leaf) |
|
574 |
{
|
|
575 |
optimizer::SEL_ARG *y= NULL; |
|
576 |
optimizer::SEL_ARG *par= NULL; |
|
577 |
optimizer::SEL_ARG *par2= NULL; |
|
578 |
optimizer::SEL_ARG *root= NULL; |
|
579 |
||
1240.3.1
by Brian Aker
Merge Padraig. |
580 |
root= this; |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
581 |
root->parent= 0; |
582 |
||
583 |
leaf->color= RED; |
|
584 |
while (leaf != root && (par= leaf->parent)->color == RED) |
|
585 |
{ // This can't be root or 1 level under |
|
586 |
if (par == (par2= leaf->parent->parent)->left) |
|
587 |
{
|
|
588 |
y= par2->right; |
|
589 |
if (y->color == RED) |
|
590 |
{
|
|
591 |
par->color= BLACK; |
|
592 |
y->color= BLACK; |
|
593 |
leaf= par2; |
|
594 |
leaf->color= RED; /* And the loop continues */ |
|
595 |
}
|
|
596 |
else
|
|
597 |
{
|
|
598 |
if (leaf == par->right) |
|
599 |
{
|
|
600 |
left_rotate(&root,leaf->parent); |
|
601 |
par= leaf; /* leaf is now parent to old leaf */ |
|
602 |
}
|
|
603 |
par->color= BLACK; |
|
604 |
par2->color= RED; |
|
605 |
right_rotate(&root, par2); |
|
606 |
break; |
|
607 |
}
|
|
608 |
}
|
|
609 |
else
|
|
610 |
{
|
|
611 |
y= par2->left; |
|
612 |
if (y->color == RED) |
|
613 |
{
|
|
614 |
par->color= BLACK; |
|
615 |
y->color= BLACK; |
|
616 |
leaf= par2; |
|
617 |
leaf->color= RED; /* And the loop continues */ |
|
618 |
}
|
|
619 |
else
|
|
620 |
{
|
|
621 |
if (leaf == par->left) |
|
622 |
{
|
|
623 |
right_rotate(&root,par); |
|
624 |
par= leaf; |
|
625 |
}
|
|
626 |
par->color= BLACK; |
|
627 |
par2->color= RED; |
|
628 |
left_rotate(&root, par2); |
|
629 |
break; |
|
630 |
}
|
|
631 |
}
|
|
632 |
}
|
|
633 |
root->color= BLACK; |
|
634 |
||
635 |
return root; |
|
636 |
}
|
|
637 |
||
638 |
||
639 |
optimizer::SEL_ARG *optimizer::rb_delete_fixup(optimizer::SEL_ARG *root, |
|
640 |
optimizer::SEL_ARG *key, |
|
641 |
optimizer::SEL_ARG *par) |
|
642 |
{
|
|
643 |
optimizer::SEL_ARG *x= NULL; |
|
644 |
optimizer::SEL_ARG *w= NULL; |
|
645 |
root->parent= 0; |
|
646 |
||
647 |
x= key; |
|
648 |
while (x != root && x->color == optimizer::SEL_ARG::BLACK) |
|
649 |
{
|
|
650 |
if (x == par->left) |
|
651 |
{
|
|
652 |
w= par->right; |
|
653 |
if (w->color == optimizer::SEL_ARG::RED) |
|
654 |
{
|
|
655 |
w->color= optimizer::SEL_ARG::BLACK; |
|
656 |
par->color= optimizer::SEL_ARG::RED; |
|
657 |
left_rotate(&root, par); |
|
658 |
w= par->right; |
|
659 |
}
|
|
1240.3.1
by Brian Aker
Merge Padraig. |
660 |
if (w->left->color == optimizer::SEL_ARG::BLACK && |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
661 |
w->right->color == optimizer::SEL_ARG::BLACK) |
662 |
{
|
|
663 |
w->color= optimizer::SEL_ARG::RED; |
|
664 |
x= par; |
|
665 |
}
|
|
666 |
else
|
|
667 |
{
|
|
668 |
if (w->right->color == optimizer::SEL_ARG::BLACK) |
|
669 |
{
|
|
670 |
w->left->color= optimizer::SEL_ARG::BLACK; |
|
671 |
w->color= optimizer::SEL_ARG::RED; |
|
672 |
right_rotate(&root, w); |
|
673 |
w= par->right; |
|
674 |
}
|
|
675 |
w->color= par->color; |
|
676 |
par->color= optimizer::SEL_ARG::BLACK; |
|
677 |
w->right->color= optimizer::SEL_ARG::BLACK; |
|
678 |
left_rotate(&root, par); |
|
679 |
x= root; |
|
680 |
break; |
|
681 |
}
|
|
682 |
}
|
|
683 |
else
|
|
684 |
{
|
|
685 |
w= par->left; |
|
686 |
if (w->color == optimizer::SEL_ARG::RED) |
|
687 |
{
|
|
688 |
w->color= optimizer::SEL_ARG::BLACK; |
|
689 |
par->color= optimizer::SEL_ARG::RED; |
|
690 |
right_rotate(&root, par); |
|
691 |
w= par->left; |
|
692 |
}
|
|
1240.3.1
by Brian Aker
Merge Padraig. |
693 |
if (w->right->color == optimizer::SEL_ARG::BLACK && |
1237.13.6
by Padraig O'Sullivan
Moved the SEL_ARG class into its own header and implementation files. Cleaned up a bunch of style |
694 |
w->left->color == optimizer::SEL_ARG::BLACK) |
695 |
{
|
|
696 |
w->color= optimizer::SEL_ARG::RED; |
|
697 |
x= par; |
|
698 |
}
|
|
699 |
else
|
|
700 |
{
|
|
701 |
if (w->left->color == SEL_ARG::BLACK) |
|
702 |
{
|
|
703 |
w->right->color= optimizer::SEL_ARG::BLACK; |
|
704 |
w->color= optimizer::SEL_ARG::RED; |
|
705 |
left_rotate(&root, w); |
|
706 |
w= par->left; |
|
707 |
}
|
|
708 |
w->color= par->color; |
|
709 |
par->color= optimizer::SEL_ARG::BLACK; |
|
710 |
w->left->color= optimizer::SEL_ARG::BLACK; |
|
711 |
right_rotate(&root, par); |
|
712 |
x= root; |
|
713 |
break; |
|
714 |
}
|
|
715 |
}
|
|
716 |
par= x->parent; |
|
717 |
}
|
|
718 |
x->color= optimizer::SEL_ARG::BLACK; |
|
719 |
return root; |
|
720 |
}
|
|
721 |
||
722 |
||
1280.1.10
by Monty Taylor
Put everything in drizzled into drizzled namespace. |
723 |
} /* namespace drizzled */ |