332
195
@return Maximum data length of the field when packed using the
333
196
Field::pack() function.
335
virtual uint32_t max_data_length() const;
336
virtual int reset(void);
337
virtual void reset_fields();
338
virtual void set_default();
339
virtual bool binary() const;
340
virtual bool zero_pack() const;
341
virtual enum ha_base_keytype key_type() const;
342
virtual uint32_t key_length() const;
198
virtual uint32 max_data_length() const {
199
return pack_length();
202
virtual int reset(void) { bzero(ptr,pack_length()); return 0; }
203
virtual void reset_fields() {}
204
virtual void set_default()
206
my_ptrdiff_t l_offset= (my_ptrdiff_t) (table->s->default_values - table->record[0]);
207
memcpy(ptr, ptr + l_offset, pack_length());
209
*null_ptr= ((*null_ptr & (uchar) ~null_bit) | (null_ptr[l_offset] & null_bit));
211
virtual bool binary() const { return 1; }
212
virtual bool zero_pack() const { return 1; }
213
virtual enum ha_base_keytype key_type() const { return HA_KEYTYPE_BINARY; }
214
virtual uint32 key_length() const { return pack_length(); }
343
215
virtual enum_field_types type() const =0;
344
virtual enum_field_types real_type() const;
345
virtual int cmp_max(const unsigned char *a, const unsigned char *b, uint32_t max_len);
346
virtual int cmp(const unsigned char *,const unsigned char *)=0;
347
int cmp_internal(const unsigned char *str) { return cmp(ptr,str); }
348
virtual int cmp_binary(const unsigned char *a,const unsigned char *b,
349
uint32_t max_length=UINT32_MAX);
350
virtual int cmp_offset(uint32_t row_offset);
351
virtual int cmp_binary_offset(uint32_t row_offset);
352
virtual int key_cmp(const unsigned char *a,const unsigned char *b);
353
virtual int key_cmp(const unsigned char *str, uint32_t length);
354
virtual uint32_t decimals() const;
216
virtual enum_field_types real_type() const { return type(); }
217
inline int cmp(const uchar *str) { return cmp(ptr,str); }
218
virtual int cmp_max(const uchar *a, const uchar *b,
219
uint max_len __attribute__((__unused__)))
220
{ return cmp(a, b); }
221
virtual int cmp(const uchar *,const uchar *)=0;
222
virtual int cmp_binary(const uchar *a,const uchar *b,
223
uint32 __attribute__((__unused__)) max_length=~0)
224
{ return memcmp(a,b,pack_length()); }
225
virtual int cmp_offset(uint row_offset)
226
{ return cmp(ptr,ptr+row_offset); }
227
virtual int cmp_binary_offset(uint row_offset)
228
{ return cmp_binary(ptr, ptr+row_offset); };
229
virtual int key_cmp(const uchar *a,const uchar *b)
230
{ return cmp(a, b); }
231
virtual int key_cmp(const uchar *str, uint length __attribute__((__unused__)))
232
{ return cmp(ptr,str); }
233
virtual uint decimals() const { return 0; }
357
235
Caller beware: sql_type can change str.Ptr, so check
358
236
ptr() to see if it changed if you are using your own buffer
359
237
in str and restore it with set() if needed
361
239
virtual void sql_type(String &str) const =0;
364
virtual uint32_t size_of() const =0;
366
bool is_null(ptrdiff_t row_offset= 0) const;
367
bool is_real_null(ptrdiff_t row_offset= 0) const;
368
bool is_null_in_record(const unsigned char *record) const;
369
bool is_null_in_record_with_offset(ptrdiff_t offset) const;
370
void set_null(ptrdiff_t row_offset= 0);
371
void set_notnull(ptrdiff_t row_offset= 0);
372
bool maybe_null(void) const;
373
bool real_maybe_null(void) const;
375
virtual void make_field(SendField *);
376
virtual void sort_string(unsigned char *buff,uint32_t length)=0;
377
virtual bool optimize_range(uint32_t idx, uint32_t part);
379
* Returns true for fields which, when compared with constant
380
* items, can be casted to int64_t. In this case we will at 'fix_fields'
381
* stage cast the constant items to int64_ts and at the execution stage
382
* use field->val_int() for comparison. Used to optimize clauses like
383
* 'a_column BETWEEN date_const AND date_const'.
240
virtual uint size_of() const =0; // For new field
241
inline bool is_null(my_ptrdiff_t row_offset= 0)
242
{ return null_ptr ? (null_ptr[row_offset] & null_bit ? 1 : 0) : table->null_row; }
243
inline bool is_real_null(my_ptrdiff_t row_offset= 0)
244
{ return null_ptr ? (null_ptr[row_offset] & null_bit ? 1 : 0) : 0; }
245
inline bool is_null_in_record(const uchar *record)
249
return test(record[(uint) (null_ptr -table->record[0])] &
252
inline bool is_null_in_record_with_offset(my_ptrdiff_t offset)
256
return test(null_ptr[offset] & null_bit);
258
inline void set_null(my_ptrdiff_t row_offset= 0)
259
{ if (null_ptr) null_ptr[row_offset]|= null_bit; }
260
inline void set_notnull(my_ptrdiff_t row_offset= 0)
261
{ if (null_ptr) null_ptr[row_offset]&= (uchar) ~null_bit; }
262
inline bool maybe_null(void) { return null_ptr != 0 || table->maybe_null; }
263
inline bool real_maybe_null(void) { return null_ptr != 0; }
266
LAST_NULL_BYTE_UNDEF= 0
270
Find the position of the last null byte for the field.
276
Return a pointer to the last byte of the null bytes where the
277
field conceptually is placed.
280
The position of the last null byte relative to the beginning of
281
the record. If the field does not use any bits of the null
282
bytes, the value 0 (LAST_NULL_BYTE_UNDEF) is returned.
385
virtual bool can_be_compared_as_int64_t() const
284
size_t last_null_byte() const {
285
size_t bytes= do_last_null_byte();
286
assert(bytes <= table->s->null_bytes);
290
virtual void make_field(Send_field *);
291
virtual void sort_string(uchar *buff,uint length)=0;
292
virtual bool optimize_range(uint idx, uint part);
294
This should be true for fields which, when compared with constant
295
items, can be casted to int64_t. In this case we will at 'fix_fields'
296
stage cast the constant items to int64_ts and at the execution stage
297
use field->val_int() for comparison. Used to optimize clauses like
298
'a_column BETWEEN date_const, date_const'.
300
virtual bool can_be_compared_as_int64_t() const { return false; }
389
301
virtual void free() {}
390
virtual Field *new_field(memory::Root *root,
302
virtual Field *new_field(MEM_ROOT *root, struct st_table *new_table,
393
virtual Field *new_key_field(memory::Root *root, Table *new_table,
394
unsigned char *new_ptr,
395
unsigned char *new_null_ptr,
396
uint32_t new_null_bit);
397
/** This is used to generate a field in Table from TableShare */
398
Field *clone(memory::Root *mem_root, Table *new_table);
399
void move_field(unsigned char *ptr_arg,unsigned char *null_ptr_arg,unsigned char null_bit_arg)
304
virtual Field *new_key_field(MEM_ROOT *root, struct st_table *new_table,
305
uchar *new_ptr, uchar *new_null_ptr,
307
Field *clone(MEM_ROOT *mem_root, struct st_table *new_table);
308
inline void move_field(uchar *ptr_arg,uchar *null_ptr_arg,uchar null_bit_arg)
402
null_ptr= null_ptr_arg;
403
null_bit= null_bit_arg;
310
ptr=ptr_arg; null_ptr=null_ptr_arg; null_bit=null_bit_arg;
405
void move_field(unsigned char *ptr_arg) { ptr=ptr_arg; }
406
virtual void move_field_offset(ptrdiff_t ptr_diff)
312
inline void move_field(uchar *ptr_arg) { ptr=ptr_arg; }
313
virtual void move_field_offset(my_ptrdiff_t ptr_diff)
408
ptr= ADD_TO_PTR(ptr,ptr_diff, unsigned char*);
315
ptr=ADD_TO_PTR(ptr,ptr_diff, uchar*);
410
null_ptr= ADD_TO_PTR(null_ptr,ptr_diff,unsigned char*);
412
virtual void get_image(unsigned char *buff, uint32_t length, const CHARSET_INFO * const)
414
memcpy(buff,ptr,length);
416
virtual void get_image(std::basic_string<unsigned char> &buff, uint32_t length, const CHARSET_INFO * const)
418
buff.append(ptr,length);
420
virtual void set_image(const unsigned char *buff,uint32_t length, const CHARSET_INFO * const)
422
memcpy(ptr,buff,length);
426
* Copy a field part into an output buffer.
430
* This function makes a copy of field part of size equal to or
431
* less than "length" parameter value.
432
* For fields of string types (VARCHAR, TEXT) the rest of buffer
433
* is padded by zero byte.
435
* @param output buffer
436
* @param output buffer size
440
* For variable length character fields (i.e. UTF-8) the "length"
441
* parameter means a number of output buffer bytes as if all field
442
* characters have maximal possible size (mbmaxlen). In the other words,
443
* "length" parameter is a number of characters multiplied by
444
* field_charset->mbmaxlen.
447
* Number of copied bytes (excluding padded zero bytes -- see above).
449
virtual uint32_t get_key_image(unsigned char *buff, uint32_t length)
451
get_image(buff, length, &my_charset_bin);
454
virtual uint32_t get_key_image(std::basic_string<unsigned char> &buff, uint32_t length)
456
get_image(buff, length, &my_charset_bin);
459
virtual void set_key_image(const unsigned char *buff,uint32_t length)
461
set_image(buff,length, &my_charset_bin);
463
int64_t val_int_offset(uint32_t row_offset)
466
int64_t tmp=val_int();
471
int64_t val_int_internal(const unsigned char *new_ptr)
473
unsigned char *old_ptr= ptr;
474
ptr= const_cast<unsigned char*>(new_ptr);
475
int64_t return_value= val_int();
317
null_ptr=ADD_TO_PTR(null_ptr,ptr_diff,uchar*);
319
virtual void get_image(uchar *buff, uint length,
320
CHARSET_INFO *cs __attribute__((__unused__)))
321
{ memcpy(buff,ptr,length); }
322
virtual void set_image(const uchar *buff,uint length,
323
CHARSET_INFO *cs __attribute__((__unused__)))
324
{ memcpy(ptr,buff,length); }
328
Copy a field part into an output buffer.
331
Field::get_key_image()
332
buff [out] output buffer
333
length output buffer size
334
type itMBR for geometry blobs, otherwise itRAW
337
This function makes a copy of field part of size equal to or
338
less than "length" parameter value.
339
For fields of string types (CHAR, VARCHAR, TEXT) the rest of buffer
340
is padded by zero byte.
343
For variable length character fields (i.e. UTF-8) the "length"
344
parameter means a number of output buffer bytes as if all field
345
characters have maximal possible size (mbmaxlen). In the other words,
346
"length" parameter is a number of characters multiplied by
347
field_charset->mbmaxlen.
350
Number of copied bytes (excluding padded zero bytes -- see above).
353
virtual uint get_key_image(uchar *buff, uint length,
354
imagetype type __attribute__((__unused__)))
356
get_image(buff, length, &my_charset_bin);
359
virtual void set_key_image(const uchar *buff,uint length)
360
{ set_image(buff,length, &my_charset_bin); }
361
inline int64_t val_int_offset(uint row_offset)
364
int64_t tmp=val_int();
368
inline int64_t val_int(const uchar *new_ptr)
371
int64_t return_value;
372
ptr= (uchar*) new_ptr;
373
return_value= val_int();
477
375
return return_value;
480
String *val_str_internal(String *str, const unsigned char *new_ptr)
377
inline String *val_str(String *str, const uchar *new_ptr)
482
unsigned char *old_ptr= ptr;
483
ptr= const_cast<unsigned char*>(new_ptr);
484
val_str_internal(str);
380
ptr= (uchar*) new_ptr;
490
Pack the field into a format suitable for storage and transfer.
492
To implement packing functionality, only the virtual function
493
should be overridden. The other functions are just convenience
494
functions and hence should not be overridden.
496
The value of <code>low_byte_first</code> is dependent on how the
497
packed data is going to be used: for local use, e.g., temporary
498
store on disk or in memory, use the native format since that is
499
faster. For data that is going to be transfered to other machines
500
(e.g., when writing data to the binary log), data should always be
501
stored in little-endian format.
503
@note The default method for packing fields just copy the raw bytes
504
of the record into the destination, but never more than
505
<code>max_length</code> characters.
508
Pointer to memory area where representation of field should be put.
511
Pointer to memory area where record representation of field is
515
Maximum length of the field, as given in the column definition. For
516
example, for <code>CHAR(1000)</code>, the <code>max_length</code>
517
is 1000. This information is sometimes needed to decide how to pack
520
@param low_byte_first
521
@c true if integers should be stored little-endian, @c false if
522
native format should be used. Note that for little-endian machines,
523
the value of this flag is a moot point since the native format is
526
virtual unsigned char *pack(unsigned char *to,
527
const unsigned char *from,
529
bool low_byte_first);
531
unsigned char *pack(unsigned char *to, const unsigned char *from);
534
Unpack a field from row data.
536
This method is used to unpack a field from a master whose size of
537
the field is less than that of the slave.
539
The <code>param_data</code> parameter is a two-byte integer (stored
540
in the least significant 16 bits of the unsigned integer) usually
541
consisting of two parts: the real type in the most significant byte
542
and a original pack length in the least significant byte.
544
The exact layout of the <code>param_data</code> field is given by
545
the <code>Table_map_log_event::save_field_metadata()</code>.
547
This is the default method for unpacking a field. It just copies
548
the memory block in byte order (of original pack length bytes or
549
length of field, whichever is smaller).
551
@param to Destination of the data
552
@param from Source of the data
553
@param param_data Real type and original pack length of the field
556
@param low_byte_first
557
If this flag is @c true, all composite entities (e.g., lengths)
558
should be unpacked in little-endian format; otherwise, the entities
559
are unpacked in native order.
561
@return New pointer into memory based on from + length of the data
563
virtual const unsigned char *unpack(unsigned char* to,
564
const unsigned char *from,
566
bool low_byte_first);
568
@overload Field::unpack(unsigned char*, const unsigned char*,
571
const unsigned char *unpack(unsigned char* to,
572
const unsigned char *from);
574
virtual unsigned char *pack_key(unsigned char* to,
575
const unsigned char *from,
579
return pack(to, from, max_length, low_byte_first);
581
virtual const unsigned char *unpack_key(unsigned char* to,
582
const unsigned char *from,
385
virtual bool send_binary(Protocol *protocol);
387
virtual uchar *pack(uchar *to, const uchar *from,
388
uint max_length, bool low_byte_first);
390
@overload Field::pack(uchar*, const uchar*, uint, bool)
392
uchar *pack(uchar *to, const uchar *from)
394
uchar *result= this->pack(to, from, UINT_MAX, table->s->db_low_byte_first);
398
virtual const uchar *unpack(uchar* to, const uchar *from,
399
uint param_data, bool low_byte_first);
401
@overload Field::unpack(uchar*, const uchar*, uint, bool)
403
const uchar *unpack(uchar* to, const uchar *from)
405
const uchar *result= unpack(to, from, 0U, table->s->db_low_byte_first);
409
virtual uchar *pack_key(uchar* to, const uchar *from,
410
uint max_length, bool low_byte_first)
412
return pack(to, from, max_length, low_byte_first);
414
virtual uchar *pack_key_from_key_image(uchar* to, const uchar *from,
415
uint max_length, bool low_byte_first)
417
return pack(to, from, max_length, low_byte_first);
419
virtual const uchar *unpack_key(uchar* to, const uchar *from,
420
uint max_length, bool low_byte_first)
586
422
return unpack(to, from, max_length, low_byte_first);
588
virtual uint32_t max_packed_col_length(uint32_t max_length)
424
virtual uint packed_col_length(const uchar *to __attribute__((__unused__)),
427
virtual uint max_packed_col_length(uint max_length)
428
{ return max_length;}
593
uint32_t offset(const unsigned char *record)
430
virtual int pack_cmp(const uchar *a,const uchar *b,
431
uint key_length_arg __attribute__((__unused__)),
432
my_bool insert_or_update __attribute__((__unused__)))
434
virtual int pack_cmp(const uchar *b,
435
uint key_length_arg __attribute__((__unused__)),
436
my_bool insert_or_update __attribute__((__unused__)))
437
{ return cmp(ptr,b); }
438
uint offset(uchar *record)
595
return (uint32_t) (ptr - record);
440
return (uint) (ptr - record);
597
442
void copy_from_tmp(int offset);
598
uint32_t fill_cache_field(CacheField *copy);
599
virtual bool get_date(type::Time <ime,uint32_t fuzzydate) const;
600
virtual bool get_time(type::Time <ime) const;
601
virtual const CHARSET_INFO *charset(void) const { return &my_charset_bin; }
602
virtual const CHARSET_INFO *sort_charset(void) const { return charset(); }
443
uint fill_cache_field(struct st_cache_field *copy);
444
virtual bool get_date(MYSQL_TIME *ltime,uint fuzzydate);
445
virtual bool get_time(MYSQL_TIME *ltime);
446
virtual CHARSET_INFO *charset(void) const { return &my_charset_bin; }
447
virtual CHARSET_INFO *sort_charset(void) const { return charset(); }
603
448
virtual bool has_charset(void) const { return false; }
604
virtual void set_charset(const CHARSET_INFO * const)
449
virtual void set_charset(CHARSET_INFO *charset_arg __attribute__((__unused__)))
606
451
virtual enum Derivation derivation(void) const
608
return DERIVATION_IMPLICIT;
610
virtual void set_derivation(enum Derivation)
613
Produce warning or note about data saved into field.
615
@param level - level of message (Note/Warning/Error)
616
@param code - error code of message to be produced
617
@param cuted_increment - whenever we should increase cut fields count or not
620
This function won't produce warning and increase cut fields counter
621
if count_cuted_fields == CHECK_FIELD_IGNORE for current thread.
623
if count_cuted_fields == CHECK_FIELD_IGNORE then we ignore notes.
624
This allows us to avoid notes in optimisation, like convert_constant_item().
627
1 if count_cuted_fields == CHECK_FIELD_IGNORE and error level is not NOTE
631
bool set_warning(DRIZZLE_ERROR::enum_warning_level,
632
drizzled::error_t code,
452
{ return DERIVATION_IMPLICIT; }
453
virtual void set_derivation(enum Derivation derivation_arg __attribute__((__unused__)))
455
bool set_warning(MYSQL_ERROR::enum_warning_level, unsigned int code,
633
456
int cuted_increment);
635
Produce warning or note about datetime string data saved into field.
637
@param level level of message (Note/Warning/Error)
638
@param code error code of message to be produced
639
@param str string value which we tried to save
640
@param str_length length of string which we tried to save
641
@param ts_type type of datetime value (datetime/date/time)
642
@param cuted_increment whenever we should increase cut fields count or not
645
This function will always produce some warning but won't increase cut
646
fields counter if count_cuted_fields ==FIELD_CHECK_IGNORE for current
649
void set_datetime_warning(DRIZZLE_ERROR::enum_warning_level,
650
drizzled::error_t code,
653
type::timestamp_t ts_type,
654
int cuted_increment);
656
Produce warning or note about integer datetime value saved into field.
658
@param level level of message (Note/Warning/Error)
659
@param code error code of message to be produced
660
@param nr numeric value which we tried to save
661
@param ts_type type of datetime value (datetime/date/time)
662
@param cuted_increment whenever we should increase cut fields count or not
665
This function will always produce some warning but won't increase cut
666
fields counter if count_cuted_fields == FIELD_CHECK_IGNORE for current
669
void set_datetime_warning(DRIZZLE_ERROR::enum_warning_level,
670
drizzled::error_t code,
672
type::timestamp_t ts_type,
673
int cuted_increment);
675
Produce warning or note about double datetime data saved into field.
677
@param level level of message (Note/Warning/Error)
678
@param code error code of message to be produced
679
@param nr double value which we tried to save
680
@param ts_type type of datetime value (datetime/date/time)
683
This function will always produce some warning but won't increase cut
684
fields counter if count_cuted_fields == FIELD_CHECK_IGNORE for current
687
void set_datetime_warning(DRIZZLE_ERROR::enum_warning_level,
688
const drizzled::error_t code,
690
type::timestamp_t ts_type);
691
bool check_overflow(int op_result)
457
void set_datetime_warning(MYSQL_ERROR::enum_warning_level, uint code,
458
const char *str, uint str_len,
459
timestamp_type ts_type, int cuted_increment);
460
void set_datetime_warning(MYSQL_ERROR::enum_warning_level, uint code,
461
int64_t nr, timestamp_type ts_type,
462
int cuted_increment);
463
void set_datetime_warning(MYSQL_ERROR::enum_warning_level, const uint code,
464
double nr, timestamp_type ts_type);
465
inline bool check_overflow(int op_result)
693
467
return (op_result == E_DEC_OVERFLOW);
696
Process decimal library return codes and issue warnings for overflow and
699
@param op_result decimal library return code (E_DEC_* see include/decimal.h)
702
E_DEC_OVERFLOW there was overflow
703
E_DEC_TRUNCATED there was truncation
705
0 no error or there was some other error except overflow or truncation
707
469
int warn_if_overflow(int op_result);
708
void init(Table *table_arg);
470
void init(TABLE *table_arg)
472
orig_table= table= table_arg;
473
table_name= &table_arg->alias;
710
476
/* maximum possible display length */
711
virtual uint32_t max_display_length()= 0;
713
virtual uint32_t is_equal(CreateField *new_field);
715
Conversion from decimal to int64_t with checking overflow and
716
setting correct value (min/max) in case of overflow.
718
@param val value which have to be converted
719
@param unsigned_flag type of integer in which we convert val
720
@param err variable to pass error code
723
value converted from val
725
int64_t convert_decimal2int64_t(const type::Decimal *val,
477
virtual uint32 max_display_length()= 0;
479
virtual uint is_equal(Create_field *new_field);
480
/* convert decimal to int64_t with overflow check */
481
int64_t convert_decimal2int64_t(const my_decimal *val, bool unsigned_flag,
728
483
/* The max. number of characters */
729
uint32_t char_length() const
484
inline uint32 char_length() const
731
486
return field_length / charset()->mbmaxlen;
734
enum column_format_type column_format() const
489
inline enum column_format_type column_format() const
736
491
return (enum column_format_type)
737
492
((flags >> COLUMN_FORMAT_FLAGS) & COLUMN_FORMAT_MASK);
741
virtual void hash(uint32_t *nr, uint32_t *nr2) const;
742
friend bool reopen_table(Session *,Table *,bool);
744
friend class CopyField;
496
virtual void hash(ulong *nr, ulong *nr2);
497
friend bool reopen_table(THD *,struct st_table *,bool);
498
friend int cre_myisam(char * name, register TABLE *form, uint options,
499
uint64_t auto_increment_value);
500
friend class Copy_field;
745
501
friend class Item_avg_field;
746
502
friend class Item_std_field;
747
503
friend class Item_sum_num;
754
510
friend class Item_sum_max;
755
511
friend class Item_func_group_concat;
757
bool isReadSet() const;
759
void setReadSet(bool arg= true);
760
void setWriteSet(bool arg= true);
764
void pack_num(uint64_t arg, unsigned char *destination= NULL);
765
void pack_num(uint32_t arg, unsigned char *destination= NULL);
766
uint64_t unpack_num(uint64_t &destination, const unsigned char *arg= NULL) const;
767
uint32_t unpack_num(uint32_t &destination, const unsigned char *arg= NULL) const;
772
inline bool isDateTime(const enum_field_types &arg)
776
case DRIZZLE_TYPE_DATE:
777
case DRIZZLE_TYPE_DATETIME:
778
case DRIZZLE_TYPE_MICROTIME:
779
case DRIZZLE_TYPE_TIME:
780
case DRIZZLE_TYPE_TIMESTAMP:
783
case DRIZZLE_TYPE_BLOB:
784
case DRIZZLE_TYPE_BOOLEAN:
785
case DRIZZLE_TYPE_DECIMAL:
786
case DRIZZLE_TYPE_DOUBLE:
787
case DRIZZLE_TYPE_ENUM:
788
case DRIZZLE_TYPE_LONG:
789
case DRIZZLE_TYPE_LONGLONG:
790
case DRIZZLE_TYPE_NULL:
791
case DRIZZLE_TYPE_UUID:
792
case DRIZZLE_TYPE_VARCHAR:
802
std::ostream& operator<<(std::ostream& output, const Field &field);
804
} /* namespace drizzled */
806
/** @TODO Why is this in the middle of the file???*/
807
#include <drizzled/create_field.h>
515
Primitive for implementing last_null_byte().
521
Primitive for the implementation of the last_null_byte()
522
function. This represents the inheritance interface and can be
523
overridden by subclasses.
525
virtual size_t do_last_null_byte() const;
813
* A class for sending field information to a client.
817
* Send_field is basically a stripped-down POD class for
818
* representing basic information about a field...
528
Retrieve the field metadata for fields.
530
This default implementation returns 0 and saves 0 in the metadata_ptr
533
@param metadata_ptr First byte of field metadata
535
@returns 0 no bytes written.
537
virtual int do_save_field_metadata(uchar *metadata_ptr __attribute__((__unused__)))
542
class Field_num :public Field {
545
bool zerofill,unsigned_flag; // Purify cannot handle bit fields
546
Field_num(uchar *ptr_arg,uint32 len_arg, uchar *null_ptr_arg,
547
uchar null_bit_arg, utype unireg_check_arg,
548
const char *field_name_arg,
549
uint8 dec_arg, bool zero_arg, bool unsigned_arg);
550
Item_result result_type () const { return REAL_RESULT; }
551
void prepend_zeros(String *value);
552
void add_zerofill_and_unsigned(String &res) const;
553
friend class Create_field;
554
void make_field(Send_field *);
555
uint decimals() const { return (uint) dec; }
556
uint size_of() const { return sizeof(*this); }
557
bool eq_def(Field *field);
558
int store_decimal(const my_decimal *);
559
my_decimal *val_decimal(my_decimal *);
560
uint is_equal(Create_field *new_field);
561
int check_int(CHARSET_INFO *cs, const char *str, int length,
562
const char *int_end, int error);
563
bool get_int(CHARSET_INFO *cs, const char *from, uint len,
564
int64_t *rnd, uint64_t unsigned_max,
565
int64_t signed_min, int64_t signed_max);
569
class Field_str :public Field {
571
CHARSET_INFO *field_charset;
572
enum Derivation field_derivation;
574
Field_str(uchar *ptr_arg,uint32 len_arg, uchar *null_ptr_arg,
575
uchar null_bit_arg, utype unireg_check_arg,
576
const char *field_name_arg, CHARSET_INFO *charset);
577
Item_result result_type () const { return STRING_RESULT; }
578
uint decimals() const { return NOT_FIXED_DEC; }
579
int store(double nr);
580
int store(int64_t nr, bool unsigned_val)=0;
581
int store_decimal(const my_decimal *);
582
int store(const char *to,uint length,CHARSET_INFO *cs)=0;
583
uint size_of() const { return sizeof(*this); }
584
CHARSET_INFO *charset(void) const { return field_charset; }
585
void set_charset(CHARSET_INFO *charset_arg) { field_charset= charset_arg; }
586
enum Derivation derivation(void) const { return field_derivation; }
587
virtual void set_derivation(enum Derivation derivation_arg)
588
{ field_derivation= derivation_arg; }
589
bool binary() const { return field_charset == &my_charset_bin; }
590
uint32 max_display_length() { return field_length; }
591
friend class Create_field;
592
my_decimal *val_decimal(my_decimal *);
593
virtual bool str_needs_quotes() { return true; }
594
bool compare_str_field_flags(Create_field *new_field, uint32 flags);
595
uint is_equal(Create_field *new_field);
599
/* base class for Field_string, Field_varstring and Field_blob */
601
class Field_longstr :public Field_str
604
int report_if_important_data(const char *ptr, const char *end);
606
Field_longstr(uchar *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
607
uchar null_bit_arg, utype unireg_check_arg,
608
const char *field_name_arg, CHARSET_INFO *charset_arg)
609
:Field_str(ptr_arg, len_arg, null_ptr_arg, null_bit_arg, unireg_check_arg,
610
field_name_arg, charset_arg)
613
int store_decimal(const my_decimal *d);
614
uint32 max_data_length() const;
617
/* base class for float and double and decimal (old one) */
618
class Field_real :public Field_num {
622
Field_real(uchar *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
623
uchar null_bit_arg, utype unireg_check_arg,
624
const char *field_name_arg,
625
uint8 dec_arg, bool zero_arg, bool unsigned_arg)
626
:Field_num(ptr_arg, len_arg, null_ptr_arg, null_bit_arg, unireg_check_arg,
627
field_name_arg, dec_arg, zero_arg, unsigned_arg),
628
not_fixed(dec_arg >= NOT_FIXED_DEC)
630
int store_decimal(const my_decimal *);
631
my_decimal *val_decimal(my_decimal *);
632
int truncate(double *nr, double max_length);
633
uint32 max_display_length() { return field_length; }
634
uint size_of() const { return sizeof(*this); }
635
virtual const uchar *unpack(uchar* to, const uchar *from,
636
uint param_data, bool low_byte_first);
637
virtual uchar *pack(uchar* to, const uchar *from,
638
uint max_length, bool low_byte_first);
642
/* New decimal/numeric field which use fixed point arithmetic */
643
class Field_new_decimal :public Field_num {
645
int do_save_field_metadata(uchar *first_byte);
647
/* The maximum number of decimal digits can be stored */
651
Constructors take max_length of the field as a parameter - not the
652
precision as the number of decimal digits allowed.
653
So for example we need to count length from precision handling
654
CREATE TABLE ( DECIMAL(x,y))
656
Field_new_decimal(uchar *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
658
enum utype unireg_check_arg, const char *field_name_arg,
659
uint8 dec_arg, bool zero_arg, bool unsigned_arg);
660
Field_new_decimal(uint32 len_arg, bool maybe_null_arg,
661
const char *field_name_arg, uint8 dec_arg,
663
enum_field_types type() const { return MYSQL_TYPE_NEWDECIMAL;}
664
enum ha_base_keytype key_type() const { return HA_KEYTYPE_BINARY; }
665
Item_result result_type () const { return DECIMAL_RESULT; }
667
bool store_value(const my_decimal *decimal_value);
668
void set_value_on_overflow(my_decimal *decimal_value, bool sign);
669
int store(const char *to, uint length, CHARSET_INFO *charset);
670
int store(double nr);
671
int store(int64_t nr, bool unsigned_val);
672
int store_time(MYSQL_TIME *ltime, timestamp_type t_type);
673
int store_decimal(const my_decimal *);
674
double val_real(void);
675
int64_t val_int(void);
676
my_decimal *val_decimal(my_decimal *);
677
String *val_str(String*, String *);
678
int cmp(const uchar *, const uchar *);
679
void sort_string(uchar *buff, uint length);
680
bool zero_pack() const { return 0; }
681
void sql_type(String &str) const;
682
uint32 max_display_length() { return field_length; }
683
uint size_of() const { return sizeof(*this); }
684
uint32 pack_length() const { return (uint32) bin_size; }
685
uint pack_length_from_metadata(uint field_metadata);
686
uint row_pack_length() { return pack_length(); }
687
int compatible_field_size(uint field_metadata);
688
uint is_equal(Create_field *new_field);
689
virtual const uchar *unpack(uchar* to, const uchar *from,
690
uint param_data, bool low_byte_first);
694
class Field_tiny :public Field_num {
696
Field_tiny(uchar *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
698
enum utype unireg_check_arg, const char *field_name_arg,
699
bool zero_arg, bool unsigned_arg)
700
:Field_num(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
701
unireg_check_arg, field_name_arg,
702
0, zero_arg,unsigned_arg)
704
enum Item_result result_type () const { return INT_RESULT; }
705
enum_field_types type() const { return MYSQL_TYPE_TINY;}
706
enum ha_base_keytype key_type() const
707
{ return unsigned_flag ? HA_KEYTYPE_BINARY : HA_KEYTYPE_INT8; }
708
int store(const char *to,uint length,CHARSET_INFO *charset);
709
int store(double nr);
710
int store(int64_t nr, bool unsigned_val);
711
int reset(void) { ptr[0]=0; return 0; }
712
double val_real(void);
713
int64_t val_int(void);
714
String *val_str(String*,String *);
715
bool send_binary(Protocol *protocol);
716
int cmp(const uchar *,const uchar *);
717
void sort_string(uchar *buff,uint length);
718
uint32 pack_length() const { return 1; }
719
void sql_type(String &str) const;
720
uint32 max_display_length() { return 4; }
722
virtual uchar *pack(uchar* to, const uchar *from,
723
uint max_length __attribute__((__unused__)),
724
bool low_byte_first __attribute__((__unused__)))
730
virtual const uchar *unpack(uchar* to, const uchar *from,
731
uint param_data __attribute__((__unused__)),
732
bool low_byte_first __attribute__((__unused__)))
740
class Field_short :public Field_num {
742
Field_short(uchar *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
744
enum utype unireg_check_arg, const char *field_name_arg,
745
bool zero_arg, bool unsigned_arg)
746
:Field_num(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
747
unireg_check_arg, field_name_arg,
748
0, zero_arg,unsigned_arg)
750
Field_short(uint32 len_arg,bool maybe_null_arg, const char *field_name_arg,
752
:Field_num((uchar*) 0, len_arg, maybe_null_arg ? (uchar*) "": 0,0,
753
NONE, field_name_arg, 0, 0, unsigned_arg)
755
enum Item_result result_type () const { return INT_RESULT; }
756
enum_field_types type() const { return MYSQL_TYPE_SHORT;}
757
enum ha_base_keytype key_type() const
758
{ return unsigned_flag ? HA_KEYTYPE_USHORT_INT : HA_KEYTYPE_SHORT_INT;}
759
int store(const char *to,uint length,CHARSET_INFO *charset);
760
int store(double nr);
761
int store(int64_t nr, bool unsigned_val);
762
int reset(void) { ptr[0]=ptr[1]=0; return 0; }
763
double val_real(void);
764
int64_t val_int(void);
765
String *val_str(String*,String *);
766
bool send_binary(Protocol *protocol);
767
int cmp(const uchar *,const uchar *);
768
void sort_string(uchar *buff,uint length);
769
uint32 pack_length() const { return 2; }
770
void sql_type(String &str) const;
771
uint32 max_display_length() { return 6; }
773
virtual uchar *pack(uchar* to, const uchar *from,
774
uint max_length __attribute__((__unused__)),
775
bool low_byte_first __attribute__((__unused__)))
778
#ifdef WORDS_BIGENDIAN
779
if (table->s->db_low_byte_first)
780
val = sint2korr(from);
785
#ifdef WORDS_BIGENDIAN
791
return to + sizeof(val);
794
virtual const uchar *unpack(uchar* to, const uchar *from,
795
uint param_data __attribute__((__unused__)),
796
bool low_byte_first __attribute__((__unused__)))
799
#ifdef WORDS_BIGENDIAN
801
val = sint2korr(from);
806
#ifdef WORDS_BIGENDIAN
807
if (table->s->db_low_byte_first)
812
return from + sizeof(val);
816
class Field_long :public Field_num {
818
Field_long(uchar *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
820
enum utype unireg_check_arg, const char *field_name_arg,
821
bool zero_arg, bool unsigned_arg)
822
:Field_num(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
823
unireg_check_arg, field_name_arg,
824
0, zero_arg,unsigned_arg)
826
Field_long(uint32 len_arg,bool maybe_null_arg, const char *field_name_arg,
828
:Field_num((uchar*) 0, len_arg, maybe_null_arg ? (uchar*) "": 0,0,
829
NONE, field_name_arg,0,0,unsigned_arg)
831
enum Item_result result_type () const { return INT_RESULT; }
832
enum_field_types type() const { return MYSQL_TYPE_LONG;}
833
enum ha_base_keytype key_type() const
834
{ return unsigned_flag ? HA_KEYTYPE_ULONG_INT : HA_KEYTYPE_LONG_INT; }
835
int store(const char *to,uint length,CHARSET_INFO *charset);
836
int store(double nr);
837
int store(int64_t nr, bool unsigned_val);
838
int reset(void) { ptr[0]=ptr[1]=ptr[2]=ptr[3]=0; return 0; }
839
double val_real(void);
840
int64_t val_int(void);
841
bool send_binary(Protocol *protocol);
842
String *val_str(String*,String *);
843
int cmp(const uchar *,const uchar *);
844
void sort_string(uchar *buff,uint length);
845
uint32 pack_length() const { return 4; }
846
void sql_type(String &str) const;
847
uint32 max_display_length() { return MY_INT32_NUM_DECIMAL_DIGITS; }
848
virtual uchar *pack(uchar* to, const uchar *from,
849
uint max_length __attribute__((__unused__)),
850
bool low_byte_first __attribute__((__unused__)))
853
#ifdef WORDS_BIGENDIAN
854
if (table->s->db_low_byte_first)
855
val = sint4korr(from);
860
#ifdef WORDS_BIGENDIAN
866
return to + sizeof(val);
869
virtual const uchar *unpack(uchar* to, const uchar *from,
870
uint param_data __attribute__((__unused__)),
871
bool low_byte_first __attribute__((__unused__)))
874
#ifdef WORDS_BIGENDIAN
876
val = sint4korr(from);
881
#ifdef WORDS_BIGENDIAN
882
if (table->s->db_low_byte_first)
887
return from + sizeof(val);
892
class Field_int64_t :public Field_num {
894
Field_int64_t(uchar *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
896
enum utype unireg_check_arg, const char *field_name_arg,
897
bool zero_arg, bool unsigned_arg)
898
:Field_num(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
899
unireg_check_arg, field_name_arg,
900
0, zero_arg,unsigned_arg)
902
Field_int64_t(uint32 len_arg,bool maybe_null_arg,
903
const char *field_name_arg,
905
:Field_num((uchar*) 0, len_arg, maybe_null_arg ? (uchar*) "": 0,0,
906
NONE, field_name_arg,0,0,unsigned_arg)
908
enum Item_result result_type () const { return INT_RESULT; }
909
enum_field_types type() const { return MYSQL_TYPE_LONGLONG;}
910
enum ha_base_keytype key_type() const
911
{ return unsigned_flag ? HA_KEYTYPE_ULONGLONG : HA_KEYTYPE_LONGLONG; }
912
int store(const char *to,uint length,CHARSET_INFO *charset);
913
int store(double nr);
914
int store(int64_t nr, bool unsigned_val);
917
ptr[0]=ptr[1]=ptr[2]=ptr[3]=ptr[4]=ptr[5]=ptr[6]=ptr[7]=0;
920
double val_real(void);
921
int64_t val_int(void);
922
String *val_str(String*,String *);
923
bool send_binary(Protocol *protocol);
924
int cmp(const uchar *,const uchar *);
925
void sort_string(uchar *buff,uint length);
926
uint32 pack_length() const { return 8; }
927
void sql_type(String &str) const;
928
bool can_be_compared_as_int64_t() const { return true; }
929
uint32 max_display_length() { return 20; }
930
virtual uchar *pack(uchar* to, const uchar *from,
931
uint max_length __attribute__((__unused__)),
932
bool low_byte_first __attribute__((__unused__)))
935
#ifdef WORDS_BIGENDIAN
936
if (table->s->db_low_byte_first)
937
val = sint8korr(from);
940
int64_tget(val, from);
942
#ifdef WORDS_BIGENDIAN
947
int64_tstore(to, val);
948
return to + sizeof(val);
951
virtual const uchar *unpack(uchar* to, const uchar *from,
952
uint param_data __attribute__((__unused__)),
953
bool low_byte_first __attribute__((__unused__)))
956
#ifdef WORDS_BIGENDIAN
958
val = sint8korr(from);
961
int64_tget(val, from);
963
#ifdef WORDS_BIGENDIAN
964
if (table->s->db_low_byte_first)
968
int64_tstore(to, val);
969
return from + sizeof(val);
973
class Field_double :public Field_real {
975
Field_double(uchar *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
977
enum utype unireg_check_arg, const char *field_name_arg,
978
uint8 dec_arg,bool zero_arg,bool unsigned_arg)
979
:Field_real(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
980
unireg_check_arg, field_name_arg,
981
dec_arg, zero_arg, unsigned_arg)
983
Field_double(uint32 len_arg, bool maybe_null_arg, const char *field_name_arg,
985
:Field_real((uchar*) 0, len_arg, maybe_null_arg ? (uchar*) "" : 0, (uint) 0,
986
NONE, field_name_arg, dec_arg, 0, 0)
988
Field_double(uint32 len_arg, bool maybe_null_arg, const char *field_name_arg,
989
uint8 dec_arg, my_bool not_fixed_arg)
990
:Field_real((uchar*) 0, len_arg, maybe_null_arg ? (uchar*) "" : 0, (uint) 0,
991
NONE, field_name_arg, dec_arg, 0, 0)
992
{not_fixed= not_fixed_arg; }
993
enum_field_types type() const { return MYSQL_TYPE_DOUBLE;}
994
enum ha_base_keytype key_type() const { return HA_KEYTYPE_DOUBLE; }
995
int store(const char *to,uint length,CHARSET_INFO *charset);
996
int store(double nr);
997
int store(int64_t nr, bool unsigned_val);
998
int reset(void) { bzero(ptr,sizeof(double)); return 0; }
999
double val_real(void);
1000
int64_t val_int(void);
1001
String *val_str(String*,String *);
1002
bool send_binary(Protocol *protocol);
1003
int cmp(const uchar *,const uchar *);
1004
void sort_string(uchar *buff,uint length);
1005
uint32 pack_length() const { return sizeof(double); }
1006
uint row_pack_length() { return pack_length(); }
1007
void sql_type(String &str) const;
1009
int do_save_field_metadata(uchar *first_byte);
1013
/* Everything saved in this will disappear. It will always return NULL */
1015
class Field_null :public Field_str {
1016
static uchar null[1];
1018
Field_null(uchar *ptr_arg, uint32 len_arg,
1019
enum utype unireg_check_arg, const char *field_name_arg,
1021
:Field_str(ptr_arg, len_arg, null, 1,
1022
unireg_check_arg, field_name_arg, cs)
1024
enum_field_types type() const { return MYSQL_TYPE_NULL;}
1025
int store(const char *to __attribute__((__unused__)),
1026
uint length __attribute__((__unused__)),
1027
CHARSET_INFO *cs __attribute__((__unused__)))
1028
{ null[0]=1; return 0; }
1029
int store(double nr __attribute__((__unused__)))
1030
{ null[0]=1; return 0; }
1031
int store(int64_t nr __attribute__((__unused__)),
1032
bool unsigned_val __attribute__((__unused__)))
1033
{ null[0]=1; return 0; }
1034
int store_decimal(const my_decimal *d __attribute__((__unused__)))
1035
{ null[0]=1; return 0; }
1038
double val_real(void)
1040
int64_t val_int(void)
1042
my_decimal *val_decimal(my_decimal *) { return 0; }
1043
String *val_str(String *value __attribute__((__unused__)),
1045
{ value2->length(0); return value2;}
1046
int cmp(const uchar *a __attribute__((__unused__)),
1047
const uchar *b __attribute__((__unused__))) { return 0;}
1048
void sort_string(uchar *buff __attribute__((__unused__)),
1049
uint length __attribute__((__unused__))) {}
1050
uint32 pack_length() const { return 0; }
1051
void sql_type(String &str) const;
1052
uint size_of() const { return sizeof(*this); }
1053
uint32 max_display_length() { return 4; }
1057
class Field_timestamp :public Field_str {
1059
Field_timestamp(uchar *ptr_arg, uint32 len_arg,
1060
uchar *null_ptr_arg, uchar null_bit_arg,
1061
enum utype unireg_check_arg, const char *field_name_arg,
1062
TABLE_SHARE *share, CHARSET_INFO *cs);
1063
Field_timestamp(bool maybe_null_arg, const char *field_name_arg,
1065
enum_field_types type() const { return MYSQL_TYPE_TIMESTAMP;}
1066
enum ha_base_keytype key_type() const { return HA_KEYTYPE_ULONG_INT; }
1067
enum Item_result cmp_type () const { return INT_RESULT; }
1068
int store(const char *to,uint length,CHARSET_INFO *charset);
1069
int store(double nr);
1070
int store(int64_t nr, bool unsigned_val);
1071
int reset(void) { ptr[0]=ptr[1]=ptr[2]=ptr[3]=0; return 0; }
1072
double val_real(void);
1073
int64_t val_int(void);
1074
String *val_str(String*,String *);
1075
bool send_binary(Protocol *protocol);
1076
int cmp(const uchar *,const uchar *);
1077
void sort_string(uchar *buff,uint length);
1078
uint32 pack_length() const { return 4; }
1079
void sql_type(String &str) const;
1080
bool can_be_compared_as_int64_t() const { return true; }
1081
bool zero_pack() const { return 0; }
1083
virtual void set_default()
1085
if (table->timestamp_field == this &&
1086
unireg_check != TIMESTAMP_UN_FIELD)
1089
Field::set_default();
1091
/* Get TIMESTAMP field value as seconds since begging of Unix Epoch */
1092
inline long get_timestamp(my_bool *null_value)
1094
if ((*null_value= is_null()))
1096
#ifdef WORDS_BIGENDIAN
1097
if (table && table->s->db_low_byte_first)
1098
return sint4korr(ptr);
1104
inline void store_timestamp(my_time_t timestamp)
1106
#ifdef WORDS_BIGENDIAN
1107
if (table && table->s->db_low_byte_first)
1109
int4store(ptr,timestamp);
1113
longstore(ptr,(uint32) timestamp);
1115
bool get_date(MYSQL_TIME *ltime,uint fuzzydate);
1116
bool get_time(MYSQL_TIME *ltime);
1117
timestamp_auto_set_type get_auto_set_type() const;
1121
class Field_year :public Field_tiny {
1123
Field_year(uchar *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
1125
enum utype unireg_check_arg, const char *field_name_arg)
1126
:Field_tiny(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
1127
unireg_check_arg, field_name_arg, 1, 1)
1129
enum_field_types type() const { return MYSQL_TYPE_YEAR;}
1130
int store(const char *to,uint length,CHARSET_INFO *charset);
1131
int store(double nr);
1132
int store(int64_t nr, bool unsigned_val);
1133
double val_real(void);
1134
int64_t val_int(void);
1135
String *val_str(String*,String *);
1136
bool send_binary(Protocol *protocol);
1137
void sql_type(String &str) const;
1138
bool can_be_compared_as_int64_t() const { return true; }
1142
class Field_newdate :public Field_str {
1144
Field_newdate(uchar *ptr_arg, uchar *null_ptr_arg, uchar null_bit_arg,
1145
enum utype unireg_check_arg, const char *field_name_arg,
1147
:Field_str(ptr_arg, 10, null_ptr_arg, null_bit_arg,
1148
unireg_check_arg, field_name_arg, cs)
1150
Field_newdate(bool maybe_null_arg, const char *field_name_arg,
1152
:Field_str((uchar*) 0,10, maybe_null_arg ? (uchar*) "": 0,0,
1153
NONE, field_name_arg, cs) {}
1154
enum_field_types type() const { return MYSQL_TYPE_NEWDATE;}
1155
enum_field_types real_type() const { return MYSQL_TYPE_NEWDATE; }
1156
enum ha_base_keytype key_type() const { return HA_KEYTYPE_UINT24; }
1157
enum Item_result cmp_type () const { return INT_RESULT; }
1158
int store(const char *to,uint length,CHARSET_INFO *charset);
1159
int store(double nr);
1160
int store(int64_t nr, bool unsigned_val);
1161
int store_time(MYSQL_TIME *ltime, timestamp_type type);
1162
int reset(void) { ptr[0]=ptr[1]=ptr[2]=0; return 0; }
1163
double val_real(void);
1164
int64_t val_int(void);
1165
String *val_str(String*,String *);
1166
bool send_binary(Protocol *protocol);
1167
int cmp(const uchar *,const uchar *);
1168
void sort_string(uchar *buff,uint length);
1169
uint32 pack_length() const { return 3; }
1170
void sql_type(String &str) const;
1171
bool can_be_compared_as_int64_t() const { return true; }
1172
bool zero_pack() const { return 1; }
1173
bool get_date(MYSQL_TIME *ltime,uint fuzzydate);
1174
bool get_time(MYSQL_TIME *ltime);
1178
class Field_time :public Field_str {
1180
Field_time(uchar *ptr_arg, uchar *null_ptr_arg, uchar null_bit_arg,
1181
enum utype unireg_check_arg, const char *field_name_arg,
1183
:Field_str(ptr_arg, 8, null_ptr_arg, null_bit_arg,
1184
unireg_check_arg, field_name_arg, cs)
1186
Field_time(bool maybe_null_arg, const char *field_name_arg,
1188
:Field_str((uchar*) 0,8, maybe_null_arg ? (uchar*) "": 0,0,
1189
NONE, field_name_arg, cs) {}
1190
enum_field_types type() const { return MYSQL_TYPE_TIME;}
1191
enum ha_base_keytype key_type() const { return HA_KEYTYPE_INT24; }
1192
enum Item_result cmp_type () const { return INT_RESULT; }
1193
int store_time(MYSQL_TIME *ltime, timestamp_type type);
1194
int store(const char *to,uint length,CHARSET_INFO *charset);
1195
int store(double nr);
1196
int store(int64_t nr, bool unsigned_val);
1197
int reset(void) { ptr[0]=ptr[1]=ptr[2]=0; return 0; }
1198
double val_real(void);
1199
int64_t val_int(void);
1200
String *val_str(String*,String *);
1201
bool get_date(MYSQL_TIME *ltime, uint fuzzydate);
1202
bool send_binary(Protocol *protocol);
1203
bool get_time(MYSQL_TIME *ltime);
1204
int cmp(const uchar *,const uchar *);
1205
void sort_string(uchar *buff,uint length);
1206
uint32 pack_length() const { return 3; }
1207
void sql_type(String &str) const;
1208
bool can_be_compared_as_int64_t() const { return true; }
1209
bool zero_pack() const { return 1; }
1213
class Field_datetime :public Field_str {
1215
Field_datetime(uchar *ptr_arg, uchar *null_ptr_arg, uchar null_bit_arg,
1216
enum utype unireg_check_arg, const char *field_name_arg,
1218
:Field_str(ptr_arg, 19, null_ptr_arg, null_bit_arg,
1219
unireg_check_arg, field_name_arg, cs)
1221
Field_datetime(bool maybe_null_arg, const char *field_name_arg,
1223
:Field_str((uchar*) 0,19, maybe_null_arg ? (uchar*) "": 0,0,
1224
NONE, field_name_arg, cs) {}
1225
enum_field_types type() const { return MYSQL_TYPE_DATETIME;}
1226
enum ha_base_keytype key_type() const { return HA_KEYTYPE_ULONGLONG; }
1227
enum Item_result cmp_type () const { return INT_RESULT; }
1228
uint decimals() const { return DATETIME_DEC; }
1229
int store(const char *to,uint length,CHARSET_INFO *charset);
1230
int store(double nr);
1231
int store(int64_t nr, bool unsigned_val);
1232
int store_time(MYSQL_TIME *ltime, timestamp_type type);
1235
ptr[0]=ptr[1]=ptr[2]=ptr[3]=ptr[4]=ptr[5]=ptr[6]=ptr[7]=0;
1238
double val_real(void);
1239
int64_t val_int(void);
1240
String *val_str(String*,String *);
1241
bool send_binary(Protocol *protocol);
1242
int cmp(const uchar *,const uchar *);
1243
void sort_string(uchar *buff,uint length);
1244
uint32 pack_length() const { return 8; }
1245
void sql_type(String &str) const;
1246
bool can_be_compared_as_int64_t() const { return true; }
1247
bool zero_pack() const { return 1; }
1248
bool get_date(MYSQL_TIME *ltime,uint fuzzydate);
1249
bool get_time(MYSQL_TIME *ltime);
1253
class Field_string :public Field_longstr {
1255
bool can_alter_field_type;
1256
Field_string(uchar *ptr_arg, uint32 len_arg,uchar *null_ptr_arg,
1258
enum utype unireg_check_arg, const char *field_name_arg,
1260
:Field_longstr(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
1261
unireg_check_arg, field_name_arg, cs),
1262
can_alter_field_type(1) {};
1263
Field_string(uint32 len_arg,bool maybe_null_arg, const char *field_name_arg,
1265
:Field_longstr((uchar*) 0, len_arg, maybe_null_arg ? (uchar*) "": 0, 0,
1266
NONE, field_name_arg, cs),
1267
can_alter_field_type(1) {};
1269
enum_field_types type() const
1271
return MYSQL_TYPE_STRING;
1273
enum ha_base_keytype key_type() const
1274
{ return binary() ? HA_KEYTYPE_BINARY : HA_KEYTYPE_TEXT; }
1275
bool zero_pack() const { return 0; }
1278
charset()->cset->fill(charset(),(char*) ptr, field_length,
1279
(has_charset() ? ' ' : 0));
1282
int store(const char *to,uint length,CHARSET_INFO *charset);
1283
int store(int64_t nr, bool unsigned_val);
1284
int store(double nr) { return Field_str::store(nr); } /* QQ: To be deleted */
1285
double val_real(void);
1286
int64_t val_int(void);
1287
String *val_str(String*,String *);
1288
my_decimal *val_decimal(my_decimal *);
1289
int cmp(const uchar *,const uchar *);
1290
void sort_string(uchar *buff,uint length);
1291
void sql_type(String &str) const;
1292
virtual uchar *pack(uchar *to, const uchar *from,
1293
uint max_length, bool low_byte_first);
1294
virtual const uchar *unpack(uchar* to, const uchar *from,
1295
uint param_data, bool low_byte_first);
1296
uint pack_length_from_metadata(uint field_metadata)
1297
{ return (field_metadata & 0x00ff); }
1298
uint row_pack_length() { return (field_length + 1); }
1299
int pack_cmp(const uchar *a,const uchar *b,uint key_length,
1300
my_bool insert_or_update);
1301
int pack_cmp(const uchar *b,uint key_length,my_bool insert_or_update);
1302
uint packed_col_length(const uchar *to, uint length);
1303
uint max_packed_col_length(uint max_length);
1304
uint size_of() const { return sizeof(*this); }
1305
enum_field_types real_type() const { return MYSQL_TYPE_STRING; }
1306
bool has_charset(void) const
1307
{ return charset() == &my_charset_bin ? false : true; }
1308
Field *new_field(MEM_ROOT *root, struct st_table *new_table, bool keep_type);
1309
virtual uint get_key_image(uchar *buff,uint length, imagetype type);
1311
int do_save_field_metadata(uchar *first_byte);
1315
class Field_varstring :public Field_longstr {
1318
The maximum space available in a Field_varstring, in bytes. See
1321
static const uint MAX_SIZE;
1322
/* Store number of bytes used to store length (1 or 2) */
1323
uint32 length_bytes;
1324
Field_varstring(uchar *ptr_arg,
1325
uint32 len_arg, uint length_bytes_arg,
1326
uchar *null_ptr_arg, uchar null_bit_arg,
1327
enum utype unireg_check_arg, const char *field_name_arg,
1328
TABLE_SHARE *share, CHARSET_INFO *cs)
1329
:Field_longstr(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
1330
unireg_check_arg, field_name_arg, cs),
1331
length_bytes(length_bytes_arg)
1333
share->varchar_fields++;
1335
Field_varstring(uint32 len_arg,bool maybe_null_arg,
1336
const char *field_name_arg,
1337
TABLE_SHARE *share, CHARSET_INFO *cs)
1338
:Field_longstr((uchar*) 0,len_arg, maybe_null_arg ? (uchar*) "": 0, 0,
1339
NONE, field_name_arg, cs),
1340
length_bytes(len_arg < 256 ? 1 :2)
1342
share->varchar_fields++;
1345
enum_field_types type() const { return MYSQL_TYPE_VARCHAR; }
1346
enum ha_base_keytype key_type() const;
1347
uint row_pack_length() { return field_length; }
1348
bool zero_pack() const { return 0; }
1349
int reset(void) { bzero(ptr,field_length+length_bytes); return 0; }
1350
uint32 pack_length() const { return (uint32) field_length+length_bytes; }
1351
uint32 key_length() const { return (uint32) field_length; }
1352
uint32 sort_length() const
1354
return (uint32) field_length + (field_charset == &my_charset_bin ?
1357
int store(const char *to,uint length,CHARSET_INFO *charset);
1358
int store(int64_t nr, bool unsigned_val);
1359
int store(double nr) { return Field_str::store(nr); } /* QQ: To be deleted */
1360
double val_real(void);
1361
int64_t val_int(void);
1362
String *val_str(String*,String *);
1363
my_decimal *val_decimal(my_decimal *);
1364
int cmp_max(const uchar *, const uchar *, uint max_length);
1365
int cmp(const uchar *a,const uchar *b)
1367
return cmp_max(a, b, ~0L);
1369
void sort_string(uchar *buff,uint length);
1370
uint get_key_image(uchar *buff,uint length, imagetype type);
1371
void set_key_image(const uchar *buff,uint length);
1372
void sql_type(String &str) const;
1373
virtual uchar *pack(uchar *to, const uchar *from,
1374
uint max_length, bool low_byte_first);
1375
uchar *pack_key(uchar *to, const uchar *from, uint max_length, bool low_byte_first);
1376
uchar *pack_key_from_key_image(uchar* to, const uchar *from,
1377
uint max_length, bool low_byte_first);
1378
virtual const uchar *unpack(uchar* to, const uchar *from,
1379
uint param_data, bool low_byte_first);
1380
const uchar *unpack_key(uchar* to, const uchar *from,
1381
uint max_length, bool low_byte_first);
1382
int pack_cmp(const uchar *a, const uchar *b, uint key_length,
1383
my_bool insert_or_update);
1384
int pack_cmp(const uchar *b, uint key_length,my_bool insert_or_update);
1385
int cmp_binary(const uchar *a,const uchar *b, uint32 max_length=~0L);
1386
int key_cmp(const uchar *,const uchar*);
1387
int key_cmp(const uchar *str, uint length);
1388
uint packed_col_length(const uchar *to, uint length);
1389
uint max_packed_col_length(uint max_length);
1390
uint32 data_length();
1391
uint32 used_length();
1392
uint size_of() const { return sizeof(*this); }
1393
enum_field_types real_type() const { return MYSQL_TYPE_VARCHAR; }
1394
bool has_charset(void) const
1395
{ return charset() == &my_charset_bin ? false : true; }
1396
Field *new_field(MEM_ROOT *root, struct st_table *new_table, bool keep_type);
1397
Field *new_key_field(MEM_ROOT *root, struct st_table *new_table,
1398
uchar *new_ptr, uchar *new_null_ptr,
1400
uint is_equal(Create_field *new_field);
1401
void hash(ulong *nr, ulong *nr2);
1403
int do_save_field_metadata(uchar *first_byte);
1407
class Field_blob :public Field_longstr {
1410
String value; // For temporaries
1412
Field_blob(uchar *ptr_arg, uchar *null_ptr_arg, uchar null_bit_arg,
1413
enum utype unireg_check_arg, const char *field_name_arg,
1414
TABLE_SHARE *share, uint blob_pack_length, CHARSET_INFO *cs);
1415
Field_blob(uint32 len_arg,bool maybe_null_arg, const char *field_name_arg,
1417
:Field_longstr((uchar*) 0, len_arg, maybe_null_arg ? (uchar*) "": 0, 0,
1418
NONE, field_name_arg, cs),
1423
Field_blob(uint32 len_arg,bool maybe_null_arg, const char *field_name_arg,
1424
CHARSET_INFO *cs, bool set_packlength)
1425
:Field_longstr((uchar*) 0,len_arg, maybe_null_arg ? (uchar*) "": 0, 0,
1426
NONE, field_name_arg, cs)
1432
uint32 l_char_length= len_arg/cs->mbmaxlen;
1433
packlength= l_char_length <= 255 ? 1 :
1434
l_char_length <= 65535 ? 2 :
1435
l_char_length <= 16777215 ? 3 : 4;
1438
Field_blob(uint32 packlength_arg)
1439
:Field_longstr((uchar*) 0, 0, (uchar*) "", 0, NONE, "temp", system_charset_info),
1440
packlength(packlength_arg) {}
1441
enum_field_types type() const { return MYSQL_TYPE_BLOB;}
1442
enum ha_base_keytype key_type() const
1443
{ return binary() ? HA_KEYTYPE_VARBINARY2 : HA_KEYTYPE_VARTEXT2; }
1444
int store(const char *to,uint length,CHARSET_INFO *charset);
1445
int store(double nr);
1446
int store(int64_t nr, bool unsigned_val);
1447
double val_real(void);
1448
int64_t val_int(void);
1449
String *val_str(String*,String *);
1450
my_decimal *val_decimal(my_decimal *);
1451
int cmp_max(const uchar *, const uchar *, uint max_length);
1452
int cmp(const uchar *a,const uchar *b)
1453
{ return cmp_max(a, b, ~0L); }
1454
int cmp(const uchar *a, uint32 a_length, const uchar *b, uint32 b_length);
1455
int cmp_binary(const uchar *a,const uchar *b, uint32 max_length=~0L);
1456
int key_cmp(const uchar *,const uchar*);
1457
int key_cmp(const uchar *str, uint length);
1458
uint32 key_length() const { return 0; }
1459
void sort_string(uchar *buff,uint length);
1460
uint32 pack_length() const
1461
{ return (uint32) (packlength+table->s->blob_ptr_size); }
1464
Return the packed length without the pointer size added.
1466
This is used to determine the size of the actual data in the row
1469
@returns The length of the raw data itself without the pointer.
1471
uint32 pack_length_no_ptr() const
1472
{ return (uint32) (packlength); }
1473
uint row_pack_length() { return pack_length_no_ptr(); }
1474
uint32 sort_length() const;
1475
virtual uint32 max_data_length() const
1477
return (uint32) (((uint64_t) 1 << (packlength*8)) -1);
1479
int reset(void) { bzero(ptr, packlength+sizeof(uchar*)); return 0; }
1480
void reset_fields() { bzero((uchar*) &value,sizeof(value)); }
1481
#ifndef WORDS_BIGENDIAN
1484
void store_length(uchar *i_ptr, uint i_packlength, uint32 i_number, bool low_byte_first);
1485
void store_length(uchar *i_ptr, uint i_packlength, uint32 i_number)
1487
store_length(i_ptr, i_packlength, i_number, table->s->db_low_byte_first);
1489
inline void store_length(uint32 number)
1491
store_length(ptr, packlength, number);
1495
Return the packed length plus the length of the data.
1497
This is used to determine the size of the data plus the
1498
packed length portion in the row data.
1500
@returns The length in the row plus the size of the data.
1502
uint32 get_packed_size(const uchar *ptr_arg, bool low_byte_first)
1503
{return packlength + get_length(ptr_arg, packlength, low_byte_first);}
1505
inline uint32 get_length(uint row_offset= 0)
1506
{ return get_length(ptr+row_offset, this->packlength, table->s->db_low_byte_first); }
1507
uint32 get_length(const uchar *ptr, uint packlength, bool low_byte_first);
1508
uint32 get_length(const uchar *ptr_arg)
1509
{ return get_length(ptr_arg, this->packlength, table->s->db_low_byte_first); }
1510
void put_length(uchar *pos, uint32 length);
1511
inline void get_ptr(uchar **str)
1513
memcpy_fixed((uchar*) str,ptr+packlength,sizeof(uchar*));
1515
inline void get_ptr(uchar **str, uint row_offset)
1517
memcpy_fixed((uchar*) str,ptr+packlength+row_offset,sizeof(char*));
1519
inline void set_ptr(uchar *length, uchar *data)
1521
memcpy(ptr,length,packlength);
1522
memcpy_fixed(ptr+packlength,&data,sizeof(char*));
1524
void set_ptr_offset(my_ptrdiff_t ptr_diff, uint32 length, uchar *data)
1526
uchar *ptr_ofs= ADD_TO_PTR(ptr,ptr_diff,uchar*);
1527
store_length(ptr_ofs, packlength, length);
1528
memcpy_fixed(ptr_ofs+packlength,&data,sizeof(char*));
1530
inline void set_ptr(uint32 length, uchar *data)
1532
set_ptr_offset(0, length, data);
1534
uint get_key_image(uchar *buff,uint length, imagetype type);
1535
void set_key_image(const uchar *buff,uint length);
1536
void sql_type(String &str) const;
1541
if (value.copy((char*) tmp, get_length(), charset()))
1543
Field_blob::reset();
1546
tmp=(uchar*) value.ptr();
1547
memcpy_fixed(ptr+packlength,&tmp,sizeof(char*));
1550
virtual uchar *pack(uchar *to, const uchar *from,
1551
uint max_length, bool low_byte_first);
1552
uchar *pack_key(uchar *to, const uchar *from,
1553
uint max_length, bool low_byte_first);
1554
uchar *pack_key_from_key_image(uchar* to, const uchar *from,
1555
uint max_length, bool low_byte_first);
1556
virtual const uchar *unpack(uchar *to, const uchar *from,
1557
uint param_data, bool low_byte_first);
1558
const uchar *unpack_key(uchar* to, const uchar *from,
1559
uint max_length, bool low_byte_first);
1560
int pack_cmp(const uchar *a, const uchar *b, uint key_length,
1561
my_bool insert_or_update);
1562
int pack_cmp(const uchar *b, uint key_length,my_bool insert_or_update);
1563
uint packed_col_length(const uchar *col_ptr, uint length);
1564
uint max_packed_col_length(uint max_length);
1565
void free() { value.free(); }
1566
inline void clear_temporary() { bzero((uchar*) &value,sizeof(value)); }
1567
friend int field_conv(Field *to,Field *from);
1568
uint size_of() const { return sizeof(*this); }
1569
bool has_charset(void) const
1570
{ return charset() == &my_charset_bin ? false : true; }
1571
uint32 max_display_length();
1572
uint is_equal(Create_field *new_field);
1573
inline bool in_read_set() { return bitmap_is_set(table->read_set, field_index); }
1574
inline bool in_write_set() { return bitmap_is_set(table->write_set, field_index); }
1576
int do_save_field_metadata(uchar *first_byte);
1580
class Field_enum :public Field_str {
1585
Field_enum(uchar *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
1587
enum utype unireg_check_arg, const char *field_name_arg,
1588
uint packlength_arg,
1589
TYPELIB *typelib_arg,
1590
CHARSET_INFO *charset_arg)
1591
:Field_str(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
1592
unireg_check_arg, field_name_arg, charset_arg),
1593
packlength(packlength_arg),typelib(typelib_arg)
1597
Field *new_field(MEM_ROOT *root, struct st_table *new_table, bool keep_type);
1598
enum_field_types type() const { return MYSQL_TYPE_STRING; }
1599
enum Item_result cmp_type () const { return INT_RESULT; }
1600
enum Item_result cast_to_int_type () const { return INT_RESULT; }
1601
enum ha_base_keytype key_type() const;
1602
int store(const char *to,uint length,CHARSET_INFO *charset);
1603
int store(double nr);
1604
int store(int64_t nr, bool unsigned_val);
1605
double val_real(void);
1606
int64_t val_int(void);
1607
String *val_str(String*,String *);
1608
int cmp(const uchar *,const uchar *);
1609
void sort_string(uchar *buff,uint length);
1610
uint32 pack_length() const { return (uint32) packlength; }
1611
void store_type(uint64_t value);
1612
void sql_type(String &str) const;
1613
uint size_of() const { return sizeof(*this); }
1614
enum_field_types real_type() const { return MYSQL_TYPE_ENUM; }
1615
uint pack_length_from_metadata(uint field_metadata)
1616
{ return (field_metadata & 0x00ff); }
1617
uint row_pack_length() { return pack_length(); }
1618
virtual bool zero_pack() const { return 0; }
1619
bool optimize_range(uint idx __attribute__((__unused__)),
1620
uint part __attribute__((__unused__)))
1622
bool eq_def(Field *field);
1623
bool has_charset(void) const { return true; }
1624
/* enum and set are sorted as integers */
1625
CHARSET_INFO *sort_charset(void) const { return &my_charset_bin; }
1627
int do_save_field_metadata(uchar *first_byte);
1631
class Field_set :public Field_enum {
1633
Field_set(uchar *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
1635
enum utype unireg_check_arg, const char *field_name_arg,
1636
uint32 packlength_arg,
1637
TYPELIB *typelib_arg, CHARSET_INFO *charset_arg)
1638
:Field_enum(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
1639
unireg_check_arg, field_name_arg,
1641
typelib_arg,charset_arg)
1643
flags=(flags & ~ENUM_FLAG) | SET_FLAG;
1645
int store(const char *to,uint length,CHARSET_INFO *charset);
1646
int store(double nr) { return Field_set::store((int64_t) nr, false); }
1647
int store(int64_t nr, bool unsigned_val);
1649
virtual bool zero_pack() const { return 1; }
1650
String *val_str(String*,String *);
1651
void sql_type(String &str) const;
1652
enum_field_types real_type() const { return MYSQL_TYPE_SET; }
1653
bool has_charset(void) const { return true; }
1658
Create field class for CREATE TABLE
1661
class Create_field :public Sql_alloc
1664
const char *field_name;
1665
const char *change; // If done with alter table
1666
const char *after; // Put column after this one
1667
LEX_STRING comment; // Comment for field
1668
Item *def; // Default value
1669
enum enum_field_types sql_type;
1671
At various stages in execution this can be length of field in bytes or
1672
max number of characters.
1676
The value of `length' as set by parser: is the number of characters
1677
for most of the types, or of bytes for BLOBs or numeric types.
1680
uint decimals, flags, pack_length, key_length;
1681
Field::utype unireg_check;
1682
TYPELIB *interval; // Which interval to use
1683
TYPELIB *save_interval; // Temporary copy for the above
1684
// Used only for UCS2 intervals
1685
List<String> interval_list;
1686
CHARSET_INFO *charset;
1687
Field *field; // For alter table
1689
uint8 row,col,sc_length,interval_id; // For rea_create_table
1690
uint offset,pack_flag;
1691
Create_field() :after(0) {}
1692
Create_field(Field *field, Field *orig_field);
1693
/* Used to make a clone of this object for ALTER/CREATE TABLE */
1694
Create_field *clone(MEM_ROOT *mem_root) const
1695
{ return new (mem_root) Create_field(*this); }
1696
void create_length_to_internal_length(void);
1698
inline enum column_format_type column_format() const
1700
return (enum column_format_type)
1701
((flags >> COLUMN_FORMAT_FLAGS) & COLUMN_FORMAT_MASK);
1704
/* Init for a tmp table field. To be extended if need be. */
1705
void init_for_tmp_table(enum_field_types sql_type_arg,
1706
uint32 max_length, uint32 decimals,
1707
bool maybe_null, bool is_unsigned);
1709
bool init(THD *thd, char *field_name, enum_field_types type, char *length,
1710
char *decimals, uint type_modifier, Item *default_value,
1711
Item *on_update_value, LEX_STRING *comment, char *change,
1712
List<String> *interval_list, CHARSET_INFO *cs,
1713
uint uint_geom_type,
1714
enum column_format_type column_format);
1719
A class for sending info to the client
823
1724
const char *db_name;
824
const char *table_name;
825
const char *org_table_name;
826
const char *col_name;
827
const char *org_col_name;
1725
const char *table_name,*org_table_name;
1726
const char *col_name,*org_col_name;
1728
uint charsetnr, flags, decimals;
832
1729
enum_field_types type;
836
uint32_t pack_length_to_packflag(uint32_t type);
837
uint32_t calc_pack_length(enum_field_types type,uint32_t length);
1735
A class for quick copying data to fields
1738
class Copy_field :public Sql_alloc {
1740
Convenience definition of a copy function returned by
1743
typedef void Copy_func(Copy_field*);
1744
Copy_func *get_copy_func(Field *to, Field *from);
1746
uchar *from_ptr,*to_ptr;
1747
uchar *from_null_ptr,*to_null_ptr;
1749
uint from_bit,to_bit;
1750
uint from_length,to_length;
1751
Field *from_field,*to_field;
1752
String tmp; // For items
1756
void set(Field *to,Field *from,bool save); // Field to field
1757
void set(uchar *to,Field *from); // Field to string
1758
void (*do_copy)(Copy_field *);
1759
void (*do_copy2)(Copy_field *); // Used to handle null values
1763
Field *make_field(TABLE_SHARE *share, uchar *ptr, uint32 field_length,
1764
uchar *null_pos, uchar null_bit,
1765
uint pack_flag, enum_field_types field_type,
1767
Field::utype unireg_check,
1768
TYPELIB *interval, const char *field_name);
1769
uint pack_length_to_packflag(uint type);
1770
enum_field_types get_blob_type_from_length(ulong length);
1771
uint32 calc_pack_length(enum_field_types type,uint32 length);
838
1772
int set_field_to_null(Field *field);
839
1773
int set_field_to_null_with_conversions(Field *field, bool no_conversions);
842
* Tests if the given string contains important data:
843
* not spaces for character string, or any data for binary string.
845
* @param pointer to the character set to use
846
* @param String to test
850
* false - If string does not have important data
852
* true - If string has some important data
854
bool test_if_important_data(const CHARSET_INFO * const cs,
858
} /* namespace drizzled */
860
#endif /* DRIZZLED_FIELD_H */
1776
The following are for the interface with the .frm file
1779
#define FIELDFLAG_DECIMAL 1
1780
#define FIELDFLAG_BINARY 1 // Shares same flag
1781
#define FIELDFLAG_NUMBER 2
1782
#define FIELDFLAG_ZEROFILL 4
1783
#define FIELDFLAG_PACK 120 // Bits used for packing
1784
#define FIELDFLAG_INTERVAL 256 // mangled with decimals!
1785
#define FIELDFLAG_BITFIELD 512 // mangled with decimals!
1786
#define FIELDFLAG_BLOB 1024 // mangled with decimals!
1787
#define FIELDFLAG_GEOM 2048 // mangled with decimals!
1789
#define FIELDFLAG_TREAT_BIT_AS_CHAR 4096 /* use Field_bit_as_char */
1791
#define FIELDFLAG_LEFT_FULLSCREEN 8192
1792
#define FIELDFLAG_RIGHT_FULLSCREEN 16384
1793
#define FIELDFLAG_FORMAT_NUMBER 16384 // predit: ###,,## in output
1794
#define FIELDFLAG_NO_DEFAULT 16384 /* sql */
1795
#define FIELDFLAG_SUM ((uint) 32768)// predit: +#fieldflag
1796
#define FIELDFLAG_MAYBE_NULL ((uint) 32768)// sql
1797
#define FIELDFLAG_HEX_ESCAPE ((uint) 0x10000)
1798
#define FIELDFLAG_PACK_SHIFT 3
1799
#define FIELDFLAG_DEC_SHIFT 8
1800
#define FIELDFLAG_MAX_DEC 31
1801
#define FIELDFLAG_NUM_SCREEN_TYPE 0x7F01
1802
#define FIELDFLAG_ALFA_SCREEN_TYPE 0x7800
1804
#define MTYP_TYPENR(type) (type & 127) /* Remove bits from type */
1806
#define f_is_dec(x) ((x) & FIELDFLAG_DECIMAL)
1807
#define f_is_num(x) ((x) & FIELDFLAG_NUMBER)
1808
#define f_is_zerofill(x) ((x) & FIELDFLAG_ZEROFILL)
1809
#define f_is_packed(x) ((x) & FIELDFLAG_PACK)
1810
#define f_packtype(x) (((x) >> FIELDFLAG_PACK_SHIFT) & 15)
1811
#define f_decimals(x) ((uint8) (((x) >> FIELDFLAG_DEC_SHIFT) & FIELDFLAG_MAX_DEC))
1812
#define f_is_alpha(x) (!f_is_num(x))
1813
#define f_is_binary(x) ((x) & FIELDFLAG_BINARY) // 4.0- compatibility
1814
#define f_is_enum(x) (((x) & (FIELDFLAG_INTERVAL | FIELDFLAG_NUMBER)) == FIELDFLAG_INTERVAL)
1815
#define f_is_bitfield(x) (((x) & (FIELDFLAG_BITFIELD | FIELDFLAG_NUMBER)) == FIELDFLAG_BITFIELD)
1816
#define f_is_blob(x) (((x) & (FIELDFLAG_BLOB | FIELDFLAG_NUMBER)) == FIELDFLAG_BLOB)
1817
#define f_is_equ(x) ((x) & (1+2+FIELDFLAG_PACK+31*256))
1818
#define f_settype(x) (((int) x) << FIELDFLAG_PACK_SHIFT)
1819
#define f_maybe_null(x) (x & FIELDFLAG_MAYBE_NULL)
1820
#define f_no_default(x) (x & FIELDFLAG_NO_DEFAULT)
1821
#define f_bit_as_char(x) ((x) & FIELDFLAG_TREAT_BIT_AS_CHAR)
1822
#define f_is_hex_escape(x) ((x) & FIELDFLAG_HEX_ESCAPE)