1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
|
/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008-2009 Sun Microsystems, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file Implementation of CreateField class
*/
#include <config.h>
#include <errno.h>
#include <float.h>
#include <drizzled/sql_select.h>
#include <drizzled/error.h>
#include <drizzled/field.h>
#include <drizzled/create_field.h>
#include <drizzled/field/str.h>
#include <drizzled/field/num.h>
#include <drizzled/field/blob.h>
#include <drizzled/field/boolean.h>
#include <drizzled/field/enum.h>
#include <drizzled/field/null.h>
#include <drizzled/field/date.h>
#include <drizzled/field/decimal.h>
#include <drizzled/field/real.h>
#include <drizzled/field/double.h>
#include <drizzled/field/int32.h>
#include <drizzled/field/int64.h>
#include <drizzled/field/num.h>
#include <drizzled/field/epoch.h>
#include <drizzled/field/datetime.h>
#include <drizzled/field/varstring.h>
#include <drizzled/field/uuid.h>
#include <drizzled/field/ipv6.h>
#include <drizzled/temporal.h>
#include <drizzled/item/string.h>
#include <drizzled/table.h>
#include <drizzled/display.h>
#include <algorithm>
using namespace std;
namespace drizzled
{
/** Create a field suitable for create of table. */
CreateField::CreateField(Field *old_field, Field *orig_field)
{
field= old_field;
field_name= change= old_field->field_name;
length= old_field->field_length;
flags= old_field->flags;
unireg_check= old_field->unireg_check;
pack_length= old_field->pack_length();
key_length= old_field->key_length();
sql_type= old_field->real_type();
charset= old_field->charset(); // May be NULL ptr
comment= old_field->comment;
decimals= old_field->decimals();
/* Fix if the original table had 4 byte pointer blobs */
if (flags & BLOB_FLAG)
{
pack_length= (pack_length - old_field->getTable()->getShare()->sizeBlobPtr() + portable_sizeof_char_ptr);
}
switch (sql_type)
{
case DRIZZLE_TYPE_BLOB:
sql_type= DRIZZLE_TYPE_BLOB;
length/= charset->mbmaxlen;
key_length/= charset->mbmaxlen;
break;
case DRIZZLE_TYPE_ENUM:
case DRIZZLE_TYPE_VARCHAR:
/* This is corrected in create_length_to_internal_length */
length= (length+charset->mbmaxlen-1) / charset->mbmaxlen;
break;
default:
break;
}
if (flags & ENUM_FLAG)
interval= ((Field_enum*) old_field)->typelib;
else
interval= 0;
def= 0;
char_length= length;
if (!(flags & (NO_DEFAULT_VALUE_FLAG)) &&
!(flags & AUTO_INCREMENT_FLAG) &&
old_field->ptr && orig_field &&
(not old_field->is_timestamp() || /* set def only if */
old_field->getTable()->timestamp_field != old_field || /* timestamp field */
unireg_check == Field::TIMESTAMP_UN_FIELD)) /* has default val */
{
/* Get the value from default_values */
ptrdiff_t diff= (ptrdiff_t) (orig_field->getTable()->getDefaultValues() - orig_field->getTable()->getInsertRecord());
orig_field->move_field_offset(diff); // Points now at default_values
if (! orig_field->is_real_null())
{
char buff[MAX_FIELD_WIDTH];
String tmp(buff, sizeof(buff), charset);
String* res= orig_field->val_str_internal(&tmp);
char* pos= memory::sql_strdup(*res);
def= new Item_string(pos, res->length(), charset);
}
orig_field->move_field_offset(-diff); // Back to getInsertRecord()
}
}
/**
Convert CreateField::length from number of characters to number of bytes.
*/
void CreateField::create_length_to_internal_length(void)
{
switch (sql_type)
{
case DRIZZLE_TYPE_BLOB:
case DRIZZLE_TYPE_VARCHAR:
length*= charset->mbmaxlen;
key_length= length;
pack_length= calc_pack_length(sql_type, length);
break;
case DRIZZLE_TYPE_ENUM:
/* Pack_length already calculated in ::init() */
length*= charset->mbmaxlen;
key_length= pack_length;
break;
case DRIZZLE_TYPE_DECIMAL:
key_length= pack_length=
class_decimal_get_binary_size(class_decimal_length_to_precision(length,
decimals,
flags &
UNSIGNED_FLAG),
decimals);
break;
default:
key_length= pack_length= calc_pack_length(sql_type, length);
break;
}
}
/**
Init for a tmp table field. To be extended if need be.
*/
void CreateField::init_for_tmp_table(enum_field_types sql_type_arg,
uint32_t length_arg,
uint32_t decimals_arg,
bool maybe_null)
{
field_name= "";
sql_type= sql_type_arg;
char_length= length= length_arg;;
unireg_check= Field::NONE;
interval= 0;
charset= &my_charset_bin;
decimals= decimals_arg & FIELDFLAG_MAX_DEC;
flags= maybe_null ? 0 : NOT_NULL_FLAG;
}
bool CreateField::init(Session *,
const char *fld_name,
enum_field_types fld_type,
const char *fld_length,
const char *fld_decimals,
uint32_t fld_type_modifier,
lex_string_t *fld_comment,
const char *fld_change,
List<String> *fld_interval_list,
const charset_info_st* fld_charset,
uint32_t,
column_format_type column_format_in)
{
uint32_t sign_len= 0;
uint32_t allowed_type_modifier= 0;
uint32_t max_field_charlength= MAX_FIELD_CHARLENGTH;
field= 0;
field_name= fld_name;
flags= fld_type_modifier;
flags|= (((uint32_t)column_format_in & COLUMN_FORMAT_MASK) << COLUMN_FORMAT_FLAGS);
unireg_check= (fld_type_modifier & AUTO_INCREMENT_FLAG ?
Field::NEXT_NUMBER : Field::NONE);
decimals= fld_decimals ? (uint32_t)atoi(fld_decimals) : 0;
if (decimals >= NOT_FIXED_DEC)
{
my_error(ER_TOO_BIG_SCALE, MYF(0), decimals, fld_name,
NOT_FIXED_DEC-1);
return true;
}
sql_type= fld_type;
length= 0;
change= fld_change;
interval= 0;
pack_length= key_length= 0;
charset= fld_charset;
interval_list.clear();
comment= *fld_comment;
if (fld_length && !(length= (uint32_t) atoi(fld_length)))
fld_length= 0;
sign_len= fld_type_modifier & UNSIGNED_FLAG ? 0 : 1;
switch (fld_type)
{
case DRIZZLE_TYPE_LONG:
if (!fld_length)
length= MAX_INT_WIDTH+sign_len;
allowed_type_modifier= AUTO_INCREMENT_FLAG;
break;
case DRIZZLE_TYPE_LONGLONG:
if (!fld_length)
length= MAX_BIGINT_WIDTH;
allowed_type_modifier= AUTO_INCREMENT_FLAG;
break;
case DRIZZLE_TYPE_NULL:
break;
case DRIZZLE_TYPE_DECIMAL:
class_decimal_trim(&length, &decimals);
if (length > DECIMAL_MAX_PRECISION)
{
my_error(ER_TOO_BIG_PRECISION, MYF(0), length, fld_name,
DECIMAL_MAX_PRECISION);
return true;
}
if (length < decimals)
{
my_error(ER_M_BIGGER_THAN_D, MYF(0), fld_name);
return true;
}
length= class_decimal_precision_to_length(length, decimals, fld_type_modifier & UNSIGNED_FLAG);
pack_length= class_decimal_get_binary_size(length, decimals);
break;
case DRIZZLE_TYPE_VARCHAR:
/*
Long VARCHAR's are automaticly converted to blobs in mysql_prepare_table
if they don't have a default value
*/
max_field_charlength= MAX_FIELD_VARCHARLENGTH;
break;
case DRIZZLE_TYPE_BLOB:
flags|= BLOB_FLAG;
break;
case DRIZZLE_TYPE_DOUBLE:
allowed_type_modifier= AUTO_INCREMENT_FLAG;
if (!fld_length && !fld_decimals)
{
length= DBL_DIG+7;
decimals= NOT_FIXED_DEC;
}
if (length < decimals &&
decimals != NOT_FIXED_DEC)
{
my_error(ER_M_BIGGER_THAN_D, MYF(0), fld_name);
return true;
}
break;
case DRIZZLE_TYPE_MICROTIME:
/*
This assert() should be correct due to absence of length
specifiers for timestamp. Previous manipulation also wasn't
ever called (from examining lcov)
*/
assert(fld_type);
case DRIZZLE_TYPE_TIMESTAMP:
length= MicroTimestamp::MAX_STRING_LENGTH;
break;
case DRIZZLE_TYPE_DATE:
length= Date::MAX_STRING_LENGTH;
break;
case DRIZZLE_TYPE_UUID:
length= field::Uuid::max_string_length();
break;
case DRIZZLE_TYPE_IPV6:
length= field::IPv6::max_string_length();
break;
case DRIZZLE_TYPE_BOOLEAN:
length= field::Boolean::max_string_length();
break;
case DRIZZLE_TYPE_DATETIME:
length= DateTime::MAX_STRING_LENGTH;
break;
case DRIZZLE_TYPE_TIME:
length= DateTime::MAX_STRING_LENGTH;
break;
case DRIZZLE_TYPE_ENUM:
{
/* Should be safe. */
pack_length= 4;
List<String>::iterator it(fld_interval_list->begin());
String *tmp;
while ((tmp= it++))
interval_list.push_back(tmp);
length= 1;
break;
}
}
/* Remember the value of length */
char_length= length;
if (!(flags & BLOB_FLAG) &&
((length > max_field_charlength &&
fld_type != DRIZZLE_TYPE_ENUM &&
(fld_type != DRIZZLE_TYPE_VARCHAR)) ||
(!length && fld_type != DRIZZLE_TYPE_VARCHAR)))
{
my_error((fld_type == DRIZZLE_TYPE_VARCHAR) ? ER_TOO_BIG_FIELDLENGTH : ER_TOO_BIG_DISPLAYWIDTH,
MYF(0),
fld_name, max_field_charlength / (charset? charset->mbmaxlen : 1));
return true;
}
fld_type_modifier&= AUTO_INCREMENT_FLAG;
if ((~allowed_type_modifier) & fld_type_modifier)
{
my_error(ER_WRONG_FIELD_SPEC, MYF(0), fld_name);
return true;
}
return false; /* success */
}
bool CreateField::setDefaultValue(Item *default_value_item,
Item *on_update_item)
{
def= default_value_item;
/*
Set NO_DEFAULT_VALUE_FLAG if this field doesn't have a default value and
it is NOT NULL, not an AUTO_INCREMENT field and not a TIMESTAMP.
*/
if (! default_value_item
&& ! (flags & AUTO_INCREMENT_FLAG)
&& (flags & NOT_NULL_FLAG)
&& (sql_type != DRIZZLE_TYPE_TIMESTAMP
and sql_type != DRIZZLE_TYPE_MICROTIME))
{
flags|= NO_DEFAULT_VALUE_FLAG;
}
else
{
flags&= ~NO_DEFAULT_VALUE_FLAG;
}
if (sql_type == DRIZZLE_TYPE_BLOB && default_value_item)
{
/* Allow empty as default value. */
String str,*res;
res= default_value_item->val_str(&str);
if (res->length())
{
my_error(ER_BLOB_CANT_HAVE_DEFAULT, MYF(0), field_name);
return true;
}
}
if (sql_type == DRIZZLE_TYPE_TIMESTAMP
|| sql_type == DRIZZLE_TYPE_MICROTIME)
{
bool on_update_now= on_update_item
|| (unireg_check == Field::TIMESTAMP_DNUN_FIELD
|| unireg_check == Field::TIMESTAMP_UN_FIELD);
if (default_value_item)
{
/* Grammar allows only NOW() value for ON UPDATE clause */
if (default_value_item->type() == Item::FUNC_ITEM &&
((Item_func*)default_value_item)->functype() == Item_func::NOW_FUNC)
{
unireg_check= (on_update_now ? Field::TIMESTAMP_DNUN_FIELD:
Field::TIMESTAMP_DN_FIELD);
/*
We don't need default value any longer moreover it is dangerous.
Everything handled by unireg_check further.
*/
def= 0;
}
else
{
unireg_check= (on_update_now ? Field::TIMESTAMP_UN_FIELD:
Field::NONE);
}
}
else
{
/*
If we have default TIMESTAMP NOT NULL column without explicit DEFAULT
or ON UPDATE values then for the sake of compatiblity we should treat
this column as having DEFAULT NOW() ON UPDATE NOW() (when we don't
have another TIMESTAMP column with auto-set option before this one)
or DEFAULT 0 (in other cases).
So here we are setting TIMESTAMP_OLD_FIELD only temporary, and will
replace this value by TIMESTAMP_DNUN_FIELD or NONE later when
information about all TIMESTAMP fields in table will be availiable.
If we have TIMESTAMP NULL column without explicit DEFAULT value
we treat it as having DEFAULT NULL attribute.
*/
unireg_check= (on_update_now ? Field::TIMESTAMP_UN_FIELD :
(flags & NOT_NULL_FLAG ? Field::TIMESTAMP_OLD_FIELD :
Field::NONE));
}
}
return false;
}
std::ostream& operator<<(std::ostream& output, const CreateField &field)
{
output << "CreateField:(";
output << field.field_name;
output << ", ";
output << display::type(field.type());
output << ", { ";
if (field.flags & NOT_NULL_FLAG)
output << " NOT_NULL";
if (field.flags & PRI_KEY_FLAG)
output << ", PRIMARY KEY";
if (field.flags & UNIQUE_KEY_FLAG)
output << ", UNIQUE KEY";
if (field.flags & MULTIPLE_KEY_FLAG)
output << ", MULTIPLE KEY";
if (field.flags & BLOB_FLAG)
output << ", BLOB";
if (field.flags & UNSIGNED_FLAG)
output << ", UNSIGNED";
if (field.flags & BINARY_FLAG)
output << ", BINARY";
output << "}, ";
if (field.field)
output << *field.field;
output << ")";
return output; // for multiple << operators.
}
} /* namespace drizzled */
|