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054d7c9abfc965f9fd8dbc45fc424d46b74c9ff9
mariadb/sql/field.h
monty@donna.mysql.com 4496d43faa Quoting of TIMESTAMP columns and small optimizations
2000-09-02 07:58:42 +03:00

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/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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; either version 2 of the License, or
(at your option) any later version.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/*
** Because of the function new_field all field classes that have static
** variables must declare the size_of() member function.
*/
#ifdef __GNUC__
#pragma interface /* gcc class implementation */
#endif
#define NOT_FIXED_DEC 31
class Send_field;
struct st_cache_field;
class Field {
Field(const Item &); /* Prevent use of theese */
void operator=(Field &);
public:
static void *operator new(size_t size) {return (void*) sql_alloc((uint) size); }
static void operator delete(void *ptr_arg, size_t size) {} /*lint -e715 */
enum utype { NONE,DATE,SHIELD,NOEMPTY,CASEUP,PNR,BGNR,PGNR,YES,NO,REL,
CHECK,EMPTY,UNKNOWN,CASEDN,NEXT_NUMBER,INTERVAL_FIELD,BIT_FIELD,
TIMESTAMP_FIELD,CAPITALIZE,BLOB_FIELD};
char *ptr; // Position to field in record
uchar *null_ptr; // Byte where null_bit is
uint8 null_bit; // And position to it
struct st_table *table; // Pointer for table
ulong query_id; // For quick test of used fields
key_map key_start,part_of_key; // Which keys a field is in
const char *table_name,*field_name;
utype unireg_check;
uint32 field_length; // Length of field
uint16 flags;
Field(char *ptr_arg,uint32 length_arg,uchar *null_ptr_arg,uint null_bit_arg,
utype unireg_check_arg, const char *field_name_arg,
struct st_table *table_arg);
virtual ~Field() {}
virtual void store(const char *to,uint length)=0;
virtual void store(double nr)=0;
virtual void store(longlong nr)=0;
virtual void store_time(TIME *ltime,timestamp_type t_type);
virtual double val_real(void)=0;
virtual longlong val_int(void)=0;
virtual String *val_str(String*,String *)=0;
virtual Item_result result_type () const=0;
virtual Item_result cmp_type () const { return result_type(); }
bool eq(Field *field) { return ptr == field->ptr; }
virtual bool eq_def(Field *field);
virtual uint32 pack_length() const { return (uint32) field_length; }
virtual void reset(void) { bzero(ptr,pack_length()); }
virtual void reset_fields() {}
virtual bool binary() const { return 1; }
virtual bool zero_pack() const { return 1; }
virtual enum ha_base_keytype key_type() const { return HA_KEYTYPE_BINARY; }
virtual uint32 key_length() const { return pack_length(); }
virtual enum_field_types type() const =0;
virtual enum_field_types real_type() const { return type(); }
inline int cmp(const char *str) { return cmp(ptr,str); }
virtual int cmp(const char *,const char *)=0;
virtual int cmp_binary(const char *a,const char *b, ulong max_length=~0L)
{ return memcmp(a,b,pack_length()); }
virtual int cmp_offset(uint row_offset)
{ return memcmp(ptr,ptr+row_offset,pack_length()); }
virtual int cmp_binary_offset(uint row_offset)
{ return memcmp(ptr,ptr+row_offset,pack_length()); }
virtual int key_cmp(const byte *a,const byte *b)
{ return cmp((char*) a,(char*) b); }
virtual int key_cmp(const byte *str, uint length)
{ return cmp(ptr,(char*) str); }
virtual uint decimals() const { return 0; }
virtual void sql_type(String &str) const =0;
// Caller beware: sql_type can change str.Ptr, so check
// ptr() to see if it changed if you are using your own buffer
// in str and restore it with set() if needed
virtual uint size_of() const =0; // For new field
inline bool is_null(uint row_offset=0)
{ return null_ptr ? (null_ptr[row_offset] & null_bit ? 1 : 0) : table->null_row; }
inline bool is_real_null(uint row_offset=0)
{ return null_ptr ? (null_ptr[row_offset] & null_bit ? 1 : 0) : 0; }
inline void set_null(int row_offset=0)
{ if (null_ptr) null_ptr[row_offset]|= null_bit; }
inline void set_notnull(int row_offset=0)
{ if (null_ptr) null_ptr[row_offset]&= ~null_bit; }
inline bool maybe_null(void) { return null_ptr != 0 || table->maybe_null; }
inline bool real_maybe_null(void) { return null_ptr != 0; }
virtual void make_field(Send_field *)=0;
virtual void sort_string(char *buff,uint length)=0;
virtual bool optimize_range();
virtual bool store_for_compare() { return 0; }
inline Field *new_field(struct st_table *new_table)
{
Field *tmp= (Field*) sql_memdup((char*) this,size_of());
if (tmp)
{
tmp->table=new_table;
tmp->key_start=tmp->part_of_key=0;
tmp->unireg_check=Field::NONE;
tmp->flags&= (NOT_NULL_FLAG | BLOB_FLAG | UNSIGNED_FLAG | ZEROFILL_FLAG | BINARY_FLAG | ENUM_FLAG | SET_FLAG);
tmp->reset_fields();
}
return tmp;
}
inline void move_field(char *ptr_arg,uchar *null_ptr_arg,uint null_bit_arg)
{
ptr=ptr_arg; null_ptr=null_ptr_arg; null_bit=null_bit_arg;
}
inline void move_field(char *ptr_arg) { ptr=ptr_arg; }
inline void move_field(my_ptrdiff_t ptr_diff)
{
ptr=ADD_TO_PTR(ptr,ptr_diff,char*);
if (null_ptr)
null_ptr=ADD_TO_PTR(null_ptr,ptr_diff,uchar*);
}
inline void get_image(char *buff,uint length)
{ memcpy(buff,ptr,length); }
inline void set_image(char *buff,uint length)
{ memcpy(ptr,buff,length); }
virtual void get_key_image(char *buff,uint length)
{ get_image(buff,length); }
virtual void set_key_image(char *buff,uint length)
{ set_image(buff,length); }
inline int cmp_image(char *buff,uint length)
{
if (binary())
return memcmp(ptr,buff,length);
else
return my_casecmp(ptr,buff,length);
}
inline longlong val_int_offset(uint row_offset)
{
ptr+=row_offset;
longlong tmp=val_int();
ptr-=row_offset;
return tmp;
}
bool send(String *packet);
virtual char *pack(char* to, const char *from, uint max_length=~(uint) 0)
{
uint length=pack_length();
memcpy(to,from,length);
return to+length;
}
virtual const char *unpack(char* to, const char *from)
{
uint length=pack_length();
memcpy(to,from,length);
return from+length;
}
virtual char *keypack(char* to, const char *from, uint max_length=~(uint) 0)
{
return pack(to,from,max_length);
}
virtual uint packed_col_length(const char *to)
{ return pack_length();}
virtual uint max_packed_col_length(uint max_length)
{ return pack_length();}
virtual int pack_cmp(const char *a,const char *b, uint key_length_arg)
{ return cmp(a,b); }
uint offset(); // Should be inline ...
void copy_from_tmp(int offset);
uint fill_cache_field(struct st_cache_field *copy);
virtual bool get_date(TIME *ltime,bool fuzzydate);
virtual bool get_time(TIME *ltime);
friend bool reopen_table(THD *,struct st_table *,bool);
friend int cre_myisam(my_string name, register TABLE *form, uint options,
ulonglong auto_increment_value);
friend class Copy_field;
friend class Item_avg_field;
friend class Item_std_field;
friend class Item_sum_num;
friend class Item_sum_sum;
friend class Item_sum_str;
friend class Item_sum_count;
friend class Item_sum_avg;
friend class Item_sum_std;
friend class Item_sum_min;
friend class Item_sum_max;
};
class Field_num :public Field {
public:
const uint8 dec;
bool zerofill,unsigned_flag; // Purify cannot handle bit fields
Field_num(char *ptr_arg,uint32 len_arg, uchar *null_ptr_arg,
uint null_bit_arg, utype unireg_check_arg,
const char *field_name_arg,
struct st_table *table_arg,
uint dec_arg,bool zero_arg,bool unsigned_arg)
:Field(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
unireg_check_arg, field_name_arg, table_arg),
dec(dec_arg),zerofill(zero_arg),unsigned_flag(unsigned_arg)
{
if (zerofill)
flags|=ZEROFILL_FLAG;
if (unsigned_flag)
flags|=UNSIGNED_FLAG;
}
Item_result result_type () const { return REAL_RESULT; }
void prepend_zeros(String *value);
void add_zerofill_and_unsigned(String &res) const;
friend class create_field;
void make_field(Send_field *);
uint decimals() const { return dec; }
uint size_of() const { return sizeof(*this); }
bool eq_def(Field *field);
};
class Field_str :public Field {
public:
Field_str(char *ptr_arg,uint32 len_arg, uchar *null_ptr_arg,
uint null_bit_arg, utype unireg_check_arg,
const char *field_name_arg,
struct st_table *table_arg)
:Field(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
unireg_check_arg, field_name_arg, table_arg)
{}
Item_result result_type () const { return STRING_RESULT; }
uint decimals() const { return NOT_FIXED_DEC; }
friend class create_field;
void make_field(Send_field *);
uint size_of() const { return sizeof(*this); }
};
class Field_decimal :public Field_num {
public:
Field_decimal(char *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
uint null_bit_arg,
enum utype unireg_check_arg, const char *field_name_arg,
struct st_table *table_arg,
uint dec_arg,bool zero_arg,bool unsigned_arg)
:Field_num(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
unireg_check_arg, field_name_arg, table_arg,
dec_arg, zero_arg,unsigned_arg)
{}
enum_field_types type() const { return FIELD_TYPE_DECIMAL;}
enum ha_base_keytype key_type() const
{ return zerofill ? HA_KEYTYPE_BINARY : HA_KEYTYPE_NUM; }
void reset(void);
void store(const char *to,uint length);
void store(double nr);
void store(longlong nr);
double val_real(void);
longlong val_int(void);
String *val_str(String*,String *);
int cmp(const char *,const char*);
void sort_string(char *buff,uint length);
void overflow(bool negative);
bool zero_pack() const { return 0; }
void sql_type(String &str) const;
};
class Field_tiny :public Field_num {
public:
Field_tiny(char *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
uint null_bit_arg,
enum utype unireg_check_arg, const char *field_name_arg,
struct st_table *table_arg,
bool zero_arg, bool unsigned_arg)
:Field_num(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
unireg_check_arg, field_name_arg, table_arg,
0, zero_arg,unsigned_arg)
{}
enum Item_result result_type () const { return INT_RESULT; }
enum_field_types type() const { return FIELD_TYPE_TINY;}
enum ha_base_keytype key_type() const
{ return unsigned_flag ? HA_KEYTYPE_BINARY : HA_KEYTYPE_INT8; }
void store(const char *to,uint length);
void store(double nr);
void store(longlong nr);
double val_real(void);
longlong val_int(void);
String *val_str(String*,String *);
int cmp(const char *,const char*);
void sort_string(char *buff,uint length);
uint32 pack_length() const { return 1; }
void sql_type(String &str) const;
};
class Field_short :public Field_num {
public:
Field_short(char *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
uint null_bit_arg,
enum utype unireg_check_arg, const char *field_name_arg,
struct st_table *table_arg,
bool zero_arg, bool unsigned_arg)
:Field_num(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
unireg_check_arg, field_name_arg, table_arg,
0, zero_arg,unsigned_arg)
{}
enum Item_result result_type () const { return INT_RESULT; }
enum_field_types type() const { return FIELD_TYPE_SHORT;}
enum ha_base_keytype key_type() const
{ return unsigned_flag ? HA_KEYTYPE_USHORT_INT : HA_KEYTYPE_SHORT_INT;}
void store(const char *to,uint length);
void store(double nr);
void store(longlong nr);
double val_real(void);
longlong val_int(void);
String *val_str(String*,String *);
int cmp(const char *,const char*);
void sort_string(char *buff,uint length);
uint32 pack_length() const { return 2; }
void sql_type(String &str) const;
};
class Field_medium :public Field_num {
public:
Field_medium(char *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
uint null_bit_arg,
enum utype unireg_check_arg, const char *field_name_arg,
struct st_table *table_arg,
bool zero_arg, bool unsigned_arg)
:Field_num(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
unireg_check_arg, field_name_arg, table_arg,
0, zero_arg,unsigned_arg)
{}
enum Item_result result_type () const { return INT_RESULT; }
enum_field_types type() const { return FIELD_TYPE_INT24;}
enum ha_base_keytype key_type() const
{ return unsigned_flag ? HA_KEYTYPE_UINT24 : HA_KEYTYPE_INT24; }
void store(const char *to,uint length);
void store(double nr);
void store(longlong nr);
double val_real(void);
longlong val_int(void);
String *val_str(String*,String *);
int cmp(const char *,const char*);
void sort_string(char *buff,uint length);
uint32 pack_length() const { return 3; }
void sql_type(String &str) const;
};
class Field_long :public Field_num {
public:
Field_long(char *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
uint null_bit_arg,
enum utype unireg_check_arg, const char *field_name_arg,
struct st_table *table_arg,
bool zero_arg, bool unsigned_arg)
:Field_num(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
unireg_check_arg, field_name_arg, table_arg,
0, zero_arg,unsigned_arg)
{}
Field_long(uint32 len_arg,bool maybe_null_arg, const char *field_name_arg,
struct st_table *table_arg,bool unsigned_arg)
:Field_num((char*) 0, len_arg, maybe_null_arg ? (uchar*) "": 0,0,
NONE, field_name_arg, table_arg,0,0,unsigned_arg)
{}
enum Item_result result_type () const { return INT_RESULT; }
enum_field_types type() const { return FIELD_TYPE_LONG;}
enum ha_base_keytype key_type() const
{ return unsigned_flag ? HA_KEYTYPE_ULONG_INT : HA_KEYTYPE_LONG_INT; }
void store(const char *to,uint length);
void store(double nr);
void store(longlong nr);
double val_real(void);
longlong val_int(void);
String *val_str(String*,String *);
int cmp(const char *,const char*);
void sort_string(char *buff,uint length);
uint32 pack_length() const { return 4; }
void sql_type(String &str) const;
};
#ifdef HAVE_LONG_LONG
class Field_longlong :public Field_num {
public:
Field_longlong(char *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
uint null_bit_arg,
enum utype unireg_check_arg, const char *field_name_arg,
struct st_table *table_arg,
bool zero_arg, bool unsigned_arg)
:Field_num(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
unireg_check_arg, field_name_arg, table_arg,
0, zero_arg,unsigned_arg)
{}
Field_longlong(uint32 len_arg,bool maybe_null_arg, const char *field_name_arg,
struct st_table *table_arg)
:Field_num((char*) 0, len_arg, maybe_null_arg ? (uchar*) "": 0,0,
NONE, field_name_arg, table_arg,0,0,0)
{}
enum Item_result result_type () const { return INT_RESULT; }
enum_field_types type() const { return FIELD_TYPE_LONGLONG;}
enum ha_base_keytype key_type() const
{ return unsigned_flag ? HA_KEYTYPE_ULONGLONG : HA_KEYTYPE_LONGLONG; }
void store(const char *to,uint length);
void store(double nr);
void store(longlong nr);
double val_real(void);
longlong val_int(void);
String *val_str(String*,String *);
int cmp(const char *,const char*);
void sort_string(char *buff,uint length);
uint32 pack_length() const { return 8; }
void sql_type(String &str) const;
};
#endif
class Field_float :public Field_num {
public:
Field_float(char *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
uint null_bit_arg,
enum utype unireg_check_arg, const char *field_name_arg,
struct st_table *table_arg,
uint dec_arg,bool zero_arg,bool unsigned_arg)
:Field_num(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
unireg_check_arg, field_name_arg, table_arg,
dec_arg, zero_arg,unsigned_arg)
{}
enum_field_types type() const { return FIELD_TYPE_FLOAT;}
enum ha_base_keytype key_type() const { return HA_KEYTYPE_FLOAT; }
void store(const char *to,uint length);
void store(double nr);
void store(longlong nr);
double val_real(void);
longlong val_int(void);
String *val_str(String*,String *);
int cmp(const char *,const char*);
void sort_string(char *buff,uint length);
uint32 pack_length() const { return sizeof(float); }
void sql_type(String &str) const;
};
class Field_double :public Field_num {
public:
Field_double(char *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
uint null_bit_arg,
enum utype unireg_check_arg, const char *field_name_arg,
struct st_table *table_arg,
uint dec_arg,bool zero_arg,bool unsigned_arg)
:Field_num(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
unireg_check_arg, field_name_arg, table_arg,
dec_arg, zero_arg,unsigned_arg)
{}
Field_double(uint32 len_arg, bool maybe_null_arg, const char *field_name_arg,
struct st_table *table_arg, uint dec_arg)
:Field_num((char*) 0, len_arg, maybe_null_arg ? (uchar*) "": 0, (uint) 0,
NONE, field_name_arg, table_arg,dec_arg,0,0)
{}
enum_field_types type() const { return FIELD_TYPE_DOUBLE;}
enum ha_base_keytype key_type() const { return HA_KEYTYPE_DOUBLE; }
void store(const char *to,uint length);
void store(double nr);
void store(longlong nr);
double val_real(void);
longlong val_int(void);
String *val_str(String*,String *);
int cmp(const char *,const char*);
void sort_string(char *buff,uint length);
uint32 pack_length() const { return sizeof(double); }
void sql_type(String &str) const;
};
/* Everything saved in this will disapper. It will always return NULL */
class Field_null :public Field_str {
static uchar null[1];
public:
Field_null(char *ptr_arg, uint32 len_arg,
enum utype unireg_check_arg, const char *field_name_arg,
struct st_table *table_arg)
:Field_str(ptr_arg, len_arg, null, 1,
unireg_check_arg, field_name_arg, table_arg)
{}
enum_field_types type() const { return FIELD_TYPE_NULL;}
void store(const char *to, uint length) { null[0]=1; }
void store(double nr) { null[0]=1; }
void store(longlong nr) { null[0]=1; }
double val_real(void) { return 0.0;}
longlong val_int(void) { return 0;}
String *val_str(String *value,String *value2)
{ value2->length(0); return value2;}
int cmp(const char *a, const char *b) { return 0;}
void sort_string(char *buff, uint length) {}
uint32 pack_length() const { return 0; }
void sql_type(String &str) const { str.set("null",4); }
uint size_of() const { return sizeof(*this); }
};
class Field_timestamp :public Field_num {
public:
Field_timestamp(char *ptr_arg, uint32 len_arg,
enum utype unireg_check_arg, const char *field_name_arg,
struct st_table *table_arg);
enum Item_result result_type () const { return field_length == 8 || field_length == 14 ? INT_RESULT : STRING_RESULT; }
enum_field_types type() const { return FIELD_TYPE_TIMESTAMP;}
enum ha_base_keytype key_type() const { return HA_KEYTYPE_ULONG_INT; }
void store(const char *to,uint length);
void store(double nr);
void store(longlong nr);
double val_real(void);
longlong val_int(void);
String *val_str(String*,String *);
int cmp(const char *,const char*);
void sort_string(char *buff,uint length);
uint32 pack_length() const { return 4; }
void sql_type(String &str) const;
bool store_for_compare() { return 1; }
bool zero_pack() const { return 0; }
void set_time();
inline long get_timestamp()
{
#ifdef WORDS_BIGENDIAN
if (table->db_low_byte_first)
return sint4korr(ptr);
#endif
long tmp;
longget(tmp,ptr);
return tmp;
}
void fill_and_store(char *from,uint len);
bool get_date(TIME *ltime,bool fuzzydate);
bool get_time(TIME *ltime);
};
class Field_year :public Field_tiny {
public:
Field_year(char *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
uint null_bit_arg,
enum utype unireg_check_arg, const char *field_name_arg,
struct st_table *table_arg)
:Field_tiny(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
unireg_check_arg, field_name_arg, table_arg, 1, 1)
{}
enum_field_types type() const { return FIELD_TYPE_YEAR;}
void store(const char *to,uint length);
void store(double nr);
void store(longlong nr);
double val_real(void);
longlong val_int(void);
String *val_str(String*,String *);
void sql_type(String &str) const;
};
class Field_date :public Field_str {
public:
Field_date(char *ptr_arg, uchar *null_ptr_arg, uint null_bit_arg,
enum utype unireg_check_arg, const char *field_name_arg,
struct st_table *table_arg)
:Field_str(ptr_arg, 10, null_ptr_arg, null_bit_arg,
unireg_check_arg, field_name_arg, table_arg)
{}
enum_field_types type() const { return FIELD_TYPE_DATE;}
enum ha_base_keytype key_type() const { return HA_KEYTYPE_ULONG_INT; }
enum Item_result cmp_type () const { return INT_RESULT; }
void store(const char *to,uint length);
void store(double nr);
void store(longlong nr);
double val_real(void);
longlong val_int(void);
String *val_str(String*,String *);
int cmp(const char *,const char*);
void sort_string(char *buff,uint length);
uint32 pack_length() const { return 4; }
void sql_type(String &str) const;
bool store_for_compare() { return 1; }
bool zero_pack() const { return 1; }
};
class Field_newdate :public Field_str {
public:
Field_newdate(char *ptr_arg, uchar *null_ptr_arg, uint null_bit_arg,
enum utype unireg_check_arg, const char *field_name_arg,
struct st_table *table_arg)
:Field_str(ptr_arg, 10, null_ptr_arg, null_bit_arg,
unireg_check_arg, field_name_arg, table_arg)
{}
enum_field_types type() const { return FIELD_TYPE_DATE;}
enum_field_types real_type() const { return FIELD_TYPE_NEWDATE; }
enum ha_base_keytype key_type() const { return HA_KEYTYPE_UINT24; }
enum Item_result cmp_type () const { return INT_RESULT; }
void store(const char *to,uint length);
void store(double nr);
void store(longlong nr);
void store_time(TIME *ltime,timestamp_type type);
double val_real(void);
longlong val_int(void);
String *val_str(String*,String *);
int cmp(const char *,const char*);
void sort_string(char *buff,uint length);
uint32 pack_length() const { return 3; }
void sql_type(String &str) const;
bool store_for_compare() { return 1; }
bool zero_pack() const { return 1; }
bool get_date(TIME *ltime,bool fuzzydate);
bool get_time(TIME *ltime);
};
class Field_time :public Field_str {
public:
Field_time(char *ptr_arg, uchar *null_ptr_arg, uint null_bit_arg,
enum utype unireg_check_arg, const char *field_name_arg,
struct st_table *table_arg)
:Field_str(ptr_arg, 8, null_ptr_arg, null_bit_arg,
unireg_check_arg, field_name_arg, table_arg)
{}
enum_field_types type() const { return FIELD_TYPE_TIME;}
enum ha_base_keytype key_type() const { return HA_KEYTYPE_INT24; }
enum Item_result cmp_type () const { return INT_RESULT; }
void store(const char *to,uint length);
void store(double nr);
void store(longlong nr);
double val_real(void);
longlong val_int(void);
String *val_str(String*,String *);
bool get_time(TIME *ltime);
int cmp(const char *,const char*);
void sort_string(char *buff,uint length);
uint32 pack_length() const { return 3; }
void sql_type(String &str) const;
bool store_for_compare() { return 1; }
bool zero_pack() const { return 1; }
};
class Field_datetime :public Field_str {
public:
Field_datetime(char *ptr_arg, uchar *null_ptr_arg, uint null_bit_arg,
enum utype unireg_check_arg, const char *field_name_arg,
struct st_table *table_arg)
:Field_str(ptr_arg, 19, null_ptr_arg, null_bit_arg,
unireg_check_arg, field_name_arg, table_arg)
{}
enum_field_types type() const { return FIELD_TYPE_DATETIME;}
#ifdef HAVE_LONG_LONG
enum ha_base_keytype key_type() const { return HA_KEYTYPE_ULONGLONG; }
#endif
enum Item_result cmp_type () const { return INT_RESULT; }
void store(const char *to,uint length);
void store(double nr);
void store(longlong nr);
void store_time(TIME *ltime,timestamp_type type);
double val_real(void);
longlong val_int(void);
String *val_str(String*,String *);
int cmp(const char *,const char*);
void sort_string(char *buff,uint length);
uint32 pack_length() const { return 8; }
void sql_type(String &str) const;
bool store_for_compare() { return 1; }
bool zero_pack() const { return 1; }
bool get_date(TIME *ltime,bool fuzzydate);
bool get_time(TIME *ltime);
};
class Field_string :public Field_str {
bool binary_flag;
public:
Field_string(char *ptr_arg, uint32 len_arg,uchar *null_ptr_arg,
uint null_bit_arg,
enum utype unireg_check_arg, const char *field_name_arg,
struct st_table *table_arg,bool binary_arg)
:Field_str(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
unireg_check_arg, field_name_arg, table_arg),
binary_flag(binary_arg)
{
if (binary_arg)
flags|=BINARY_FLAG;
}
Field_string(uint32 len_arg,bool maybe_null_arg, const char *field_name_arg,
struct st_table *table_arg, bool binary_arg)
:Field_str((char*) 0,len_arg, maybe_null_arg ? (uchar*) "": 0,0,
NONE, field_name_arg, table_arg),
binary_flag(binary_arg)
{
if (binary_arg)
flags|=BINARY_FLAG;
}
enum_field_types type() const
{
return ((table && table->db_create_options & HA_OPTION_PACK_RECORD &&
field_length >= 4) ?
FIELD_TYPE_VAR_STRING : FIELD_TYPE_STRING);
}
enum ha_base_keytype key_type() const
{ return binary_flag ? HA_KEYTYPE_BINARY : HA_KEYTYPE_TEXT; }
bool zero_pack() const { return 0; }
bool binary() const { return binary_flag; }
void reset(void) { bfill(ptr,field_length,' '); }
void store(const char *to,uint length);
void store(double nr);
void store(longlong nr);
double val_real(void);
longlong val_int(void);
String *val_str(String*,String *);
int cmp(const char *,const char*);
void sort_string(char *buff,uint length);
void sql_type(String &str) const;
char *pack(char *to, const char *from, uint max_length=~(uint) 0);
const char *unpack(char* to, const char *from);
int pack_cmp(const char *a,const char *b,uint key_length);
uint packed_col_length(const char *to);
uint max_packed_col_length(uint max_length);
uint size_of() const { return sizeof(*this); }
enum_field_types real_type() const { return FIELD_TYPE_STRING; }
};
class Field_varstring :public Field_str {
bool binary_flag;
public:
Field_varstring(char *ptr_arg, uint32 len_arg,uchar *null_ptr_arg,
uint null_bit_arg,
enum utype unireg_check_arg, const char *field_name_arg,
struct st_table *table_arg,bool binary_arg)
:Field_str(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
unireg_check_arg, field_name_arg, table_arg),
binary_flag(binary_arg)
{
if (binary_arg)
flags|=BINARY_FLAG;
}
Field_varstring(uint32 len_arg,bool maybe_null_arg, const char *field_name_arg,
struct st_table *table_arg, bool binary_arg)
:Field_str((char*) 0,len_arg, maybe_null_arg ? (uchar*) "": 0,0,
NONE, field_name_arg, table_arg),
binary_flag(binary_arg)
{
if (binary_arg)
flags|=BINARY_FLAG;
}
enum_field_types type() const { return FIELD_TYPE_VAR_STRING; }
enum ha_base_keytype key_type() const
{ return binary_flag ? HA_KEYTYPE_VARBINARY : HA_KEYTYPE_VARTEXT; }
bool zero_pack() const { return 0; }
bool binary() const { return binary_flag; }
void reset(void) { bzero(ptr,field_length+2); }
uint32 pack_length() const { return (uint32) field_length+2; }
uint32 key_length() const { return (uint32) field_length; }
void store(const char *to,uint length);
void store(double nr);
void store(longlong nr);
double val_real(void);
longlong val_int(void);
String *val_str(String*,String *);
int cmp(const char *,const char*);
void sort_string(char *buff,uint length);
void sql_type(String &str) const;
char *pack(char *to, const char *from, uint max_length=~(uint) 0);
const char *unpack(char* to, const char *from);
int pack_cmp(const char *a, const char *b, uint key_length);
uint packed_col_length(const char *to);
uint max_packed_col_length(uint max_length);
uint size_of() const { return sizeof(*this); }
enum_field_types real_type() const { return FIELD_TYPE_VAR_STRING; }
};
class Field_blob :public Field_str {
uint packlength;
String value; // For temporaries
bool binary_flag;
public:
Field_blob(char *ptr_arg, uchar *null_ptr_arg, uint null_bit_arg,
enum utype unireg_check_arg, const char *field_name_arg,
struct st_table *table_arg,uint blob_pack_length,
bool binary_arg);
Field_blob(uint32 len_arg,bool maybe_null_arg, const char *field_name_arg,
struct st_table *table_arg, bool binary_arg)
:Field_str((char*) 0,len_arg, maybe_null_arg ? (uchar*) "": 0,0,
NONE, field_name_arg, table_arg),
packlength(3),binary_flag(binary_arg)
{
flags|= BLOB_FLAG;
if (binary_arg)
flags|=BINARY_FLAG;
}
enum_field_types type() const { return FIELD_TYPE_BLOB;}
enum ha_base_keytype key_type() const
{ return binary_flag ? HA_KEYTYPE_VARBINARY : HA_KEYTYPE_VARTEXT; }
void store(const char *to,uint length);
void store(double nr);
void store(longlong nr);
double val_real(void);
longlong val_int(void);
String *val_str(String*,String *);
int cmp(const char *,const char*);
int cmp(const char *a, ulong a_length, const char *b, ulong b_length);
int cmp_offset(uint offset);
int cmp_binary(const char *a,const char *b, ulong max_length=~0L);
int cmp_binary_offset(uint row_offset);
int key_cmp(const byte *,const byte*);
int key_cmp(const byte *str, uint length);
uint32 key_length() const { return 0; }
void sort_string(char *buff,uint length);
uint32 pack_length() const { return (uint32) (packlength+table->blob_ptr_size); }
void reset(void) { bzero(ptr,packlength+sizeof(char*)); }
void reset_fields() { bzero((char*) &value,sizeof(value)); }
void store_length(ulong number);
inline ulong get_length(uint row_offset=0)
{ return get_length(ptr+row_offset); }
ulong get_length(const char *ptr);
bool binary() const { return binary_flag; }
inline void get_ptr(char **str)
{
memcpy_fixed(str,ptr+packlength,sizeof(char*));
}
inline void set_ptr(char *length,char *data)
{
memcpy(ptr,length,packlength);
memcpy_fixed(ptr+packlength,&data,sizeof(char*));
}
inline void set_ptr(ulong length,char *data)
{
store_length(length);
memcpy_fixed(ptr+packlength,&data,sizeof(char*));
}
void get_key_image(char *buff,uint length);
void set_key_image(char *buff,uint length);
void sql_type(String &str) const;
inline bool copy()
{ char *tmp;
get_ptr(&tmp);
if (value.copy(tmp,get_length()))
{
Field_blob::reset();
return 1;
}
tmp=(char*) value.ptr(); memcpy_fixed(ptr+packlength,&tmp,sizeof(char*));
return 0;
}
char *pack(char *to, const char *from, uint max_length= ~(uint) 0)
{
ulong length=get_length();
if (length > max_length)
{
length=max_length;
char *save=ptr;
ptr=to;
store_length(length);
ptr=save;
}
else
memcpy(to,from,packlength);
if (length)
{
get_ptr((char**) &from);
memcpy(to+packlength, from,length);
return to+packlength+length;
}
return to+packlength;
}
const char *unpack(char *to, const char *from)
{
memcpy(to,from,packlength);
from+=packlength;
ulong length=get_length();
if (length)
memcpy_fixed(to+packlength, &from, sizeof(from));
else
bzero(to+packlength,sizeof(from));
return from+length;
}
char *pack_key(char *to, const char *from, uint max_length=~(uint) 0);
int pack_cmp(const char *a, const char *b, uint key_length);
uint packed_col_length(const char *col_ptr)
{ return get_length(col_ptr)+packlength;}
virtual uint max_packed_col_length(uint max_length)
{ return packlength+max_length; }
inline void free() { value.free(); }
inline void clear_temporary() { bzero((char*) &value,sizeof(value)); }
friend void field_conv(Field *to,Field *from);
uint size_of() const { return sizeof(*this); }
};
class Field_enum :public Field_str {
protected:
uint packlength;
public:
TYPELIB *typelib;
Field_enum(char *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
uint null_bit_arg,
enum utype unireg_check_arg, const char *field_name_arg,
struct st_table *table_arg,uint packlength_arg,
TYPELIB *typelib_arg)
:Field_str(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
unireg_check_arg, field_name_arg, table_arg),
packlength(packlength_arg),typelib(typelib_arg)
{
flags|=ENUM_FLAG;
}
enum_field_types type() const { return FIELD_TYPE_STRING; }
enum Item_result cmp_type () const { return INT_RESULT; }
enum ha_base_keytype key_type() const;
void store(const char *to,uint length);
void store(double nr);
void store(longlong nr);
double val_real(void);
longlong val_int(void);
String *val_str(String*,String *);
int cmp(const char *,const char*);
void sort_string(char *buff,uint length);
uint32 pack_length() const { return (uint32) packlength; }
void store_type(ulonglong value);
void sql_type(String &str) const;
uint size_of() const { return sizeof(*this); }
enum_field_types real_type() const { return FIELD_TYPE_ENUM; }
virtual bool zero_pack() const { return 0; }
bool optimize_range() { return 0; }
bool binary() const { return 0; }
bool eq_def(Field *field);
};
class Field_set :public Field_enum {
public:
Field_set(char *ptr_arg, uint32 len_arg, uchar *null_ptr_arg,
uint null_bit_arg,
enum utype unireg_check_arg, const char *field_name_arg,
struct st_table *table_arg,uint32 packlength_arg,
TYPELIB *typelib_arg)
:Field_enum(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
unireg_check_arg, field_name_arg,
table_arg, packlength_arg,
typelib_arg)
{
flags=(flags & ~ENUM_FLAG) | SET_FLAG;
}
void store(const char *to,uint length);
void store(double nr) { Field_set::store((longlong) nr); }
void store(longlong nr);
virtual bool zero_pack() const { return 1; }
String *val_str(String*,String *);
void sql_type(String &str) const;
enum_field_types real_type() const { return FIELD_TYPE_SET; }
};
/*
** Create field class for CREATE TABLE
*/
class create_field :public Sql_alloc {
public:
const char *field_name;
const char *change; // If done with alter table
const char *after; // Put column after this one
Item *def; // Default value
enum enum_field_types sql_type;
uint32 length;
uint decimals,flags,pack_length;
Field::utype unireg_check;
TYPELIB *interval; // Which interval to use
Field *field; // For alter table
uint8 row,col,sc_length,interval_id; // For rea_create_table
uint offset,pack_flag;
create_field() :after(0) {}
create_field(Field *field,bool ignore_default=0);
};
/*
** A class for sending info to the client
*/
class Send_field {
public:
const char *table_name,*col_name;
uint length,flags,decimals;
enum_field_types type;
Send_field() {}
};
/*
** A class for quick copying data to fields
*/
class Copy_field :public Sql_alloc {
void (*get_copy_func(Field *to,Field *from))(Copy_field *);
public:
char *from_ptr,*to_ptr;
uchar *from_null_ptr,*to_null_ptr;
my_bool *null_row;
uint from_bit,to_bit;
uint from_length,to_length;
Field *from_field,*to_field;
String tmp; // For items
Copy_field() {}
~Copy_field() {}
void set(Field *to,Field *from,bool save); // Field to field
void set(char *to,Field *from); // Field to string
void (*do_copy)(Copy_field *);
void (*do_copy2)(Copy_field *); // Used to handle null values
};
Field *make_field(char *ptr, uint32 field_length,
uchar *null_pos, uint null_bit,
uint pack_flag, Field::utype unireg_check,
TYPELIB *interval, const char *field_name,
struct st_table *table);
uint pack_length_to_packflag(uint type);
uint32 calc_pack_length(enum_field_types type,uint32 length);
bool set_field_to_null(Field *field);
uint find_enum(TYPELIB *typelib,const char *x, uint length);
ulonglong find_set(TYPELIB *typelib,const char *x, uint length);
bool test_if_int(const char *str,int length);
/*
** The following are for the interface with the .frm file
*/
#define FIELDFLAG_DECIMAL 1
#define FIELDFLAG_BINARY 1 // Shares same flag
#define FIELDFLAG_NUMBER 2
#define FIELDFLAG_ZEROFILL 4
#define FIELDFLAG_PACK 120 // Bits used for packing
#define FIELDFLAG_INTERVAL 256
#define FIELDFLAG_BITFIELD 512 // mangled with dec!
#define FIELDFLAG_BLOB 1024 // mangled with dec!
#define FIELDFLAG_LEFT_FULLSCREEN 8192
#define FIELDFLAG_RIGHT_FULLSCREEN 16384
#define FIELDFLAG_FORMAT_NUMBER 16384 // predit: ###,,## in output
#define FIELDFLAG_SUM ((uint) 32768)// predit: +#fieldflag
#define FIELDFLAG_MAYBE_NULL ((uint) 32768)// sql
#define FIELDFLAG_PACK_SHIFT 3
#define FIELDFLAG_DEC_SHIFT 8
#define FIELDFLAG_MAX_DEC 31
#define FIELDFLAG_NUM_SCREEN_TYPE 0x7F01
#define FIELDFLAG_ALFA_SCREEN_TYPE 0x7800
#define FIELD_SORT_REVERSE 16384
#define MTYP_TYPENR(type) (type & 127) /* Remove bits from type */
#define f_is_dec(x) ((x) & FIELDFLAG_DECIMAL)
#define f_is_num(x) ((x) & FIELDFLAG_NUMBER)
#define f_is_zerofill(x) ((x) & FIELDFLAG_ZEROFILL)
#define f_is_packed(x) ((x) & FIELDFLAG_PACK)
#define f_packtype(x) (((x) >> FIELDFLAG_PACK_SHIFT) & 15)
#define f_decimals(x) (((x) >> FIELDFLAG_DEC_SHIFT) & FIELDFLAG_MAX_DEC)
#define f_is_alpha(x) (!f_is_num(x))
#define f_is_binary(x) ((x) & FIELDFLAG_BINARY)
#define f_is_enum(x) ((x) & FIELDFLAG_INTERVAL)
#define f_is_bitfield(x) ((x) & FIELDFLAG_BITFIELD)
#define f_is_blob(x) (((x) & (FIELDFLAG_BLOB | FIELDFLAG_NUMBER)) == FIELDFLAG_BLOB)
#define f_is_equ(x) ((x) & (1+2+FIELDFLAG_PACK+31*256))
#define f_settype(x) (((int) x) << FIELDFLAG_PACK_SHIFT)
#define f_maybe_null(x) (x & FIELDFLAG_MAYBE_NULL)
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