Skip navigation links

MySQL Newsletter - Subscribe Today!

The world's most popular open source database

MySQL 5.1: Field_str Class Reference

Field_str Class Reference

#include <field.h>

Inheritance diagram for Field_str:

Inheritance graph
[legend]
Collaboration diagram for Field_str:

Collaboration graph
[legend]
List of all members.

Public Member Functions

 Field_str (char *ptr_arg, uint32 len_arg, uchar *null_ptr_arg, uchar null_bit_arg, utype unireg_check_arg, const char *field_name_arg, CHARSET_INFO *charset)
Item_result result_type () const
uint decimals () const
int store (double nr)
int store (longlong nr, bool unsigned_val)=0
int store_decimal (const my_decimal *)
int store (const char *to, uint length, CHARSET_INFO *cs)=0
uint size_of () const
CHARSET_INFO * charset (void) const
void set_charset (CHARSET_INFO *charset)
bool binary () const
uint32 max_length ()
my_decimal * val_decimal (my_decimal *)
virtual bool str_needs_quotes ()
uint is_equal (create_field *new_field)

Protected Attributes

CHARSET_INFO * field_charset

Friends

class create_field

Detailed Description

Definition at line 405 of file field.h.

Constructor & Destructor Documentation

Field_str::Field_str ( char *  ptr_arg,
uint32  len_arg,
uchar *  null_ptr_arg,
uchar  null_bit_arg,
utype  unireg_check_arg,
const char *  field_name_arg,
CHARSET_INFO *  charset 
)

Definition at line 1411 of file field.cc.

References BINARY_FLAG, charset(), field_charset, Field::flags, MY_CS_BINSORT, and charset_info_st::state.

01414   :Field(ptr_arg, len_arg, null_ptr_arg, null_bit_arg,
01415          unireg_check_arg, field_name_arg)
01416 {
01417   field_charset=charset;
01418   if (charset->state & MY_CS_BINSORT)
01419     flags|=BINARY_FLAG;
01420 }

Here is the call graph for this function:

Member Function Documentation

bool Field_str::binary (  )  const [inline, virtual]

Reimplemented from Field.

Definition at line 421 of file field.h.

References field_charset, and my_charset_bin.

Referenced by Field_blob::key_type(), Field_string::key_type(), Field_varstring::key_type(), Field_varstring::store(), and Field_string::store().

00421 { return field_charset == &my_charset_bin; }

Here is the caller graph for this function:

CHARSET_INFO* Field_str::charset ( void   )  const [inline, virtual]

Reimplemented from Field.

Definition at line 419 of file field.h.

References field_charset.

Referenced by Field_blob::copy(), Field_str(), Field_blob::has_charset(), Field_varstring::has_charset(), Field_string::has_charset(), Field_varstring::hash(), Field_blob::key_cmp(), Field_string::new_field(), Field_string::reset(), set_charset(), Field_set::sql_type(), Field_enum::sql_type(), Field_blob::sql_type(), Field_varstring::sql_type(), Field_string::sql_type(), Field_blob::store(), Field_string::store(), store(), Field_blob::val_decimal(), Field_varstring::val_decimal(), Field_string::val_decimal(), Field_blob::val_int(), Field_string::val_int(), Field_blob::val_real(), and Field_string::val_real().

00419 { return field_charset; }

Here is the caller graph for this function:

uint Field_str::decimals (  )  const [inline, virtual]

Reimplemented from Field.

Reimplemented in Field_datetime.

Definition at line 413 of file field.h.

References NOT_FIXED_DEC.

00413 { return NOT_FIXED_DEC; }

uint Field_str::is_equal ( create_field *  new_field  )  [virtual]

Reimplemented from Field.

Reimplemented in Field_varstring.

Definition at line 6046 of file field.cc.

References BINARY_FLAG, BINCMP_FLAG, Field::charset(), field_charset, Field::flags, max_length(), Field::new_field(), Field::real_type(), and Field::sql_type().

06047 {
06048   if (((new_field->flags & (BINCMP_FLAG | BINARY_FLAG)) &&
06049        !(flags & (BINCMP_FLAG | BINARY_FLAG))) ||
06050       (!(new_field->flags & (BINCMP_FLAG | BINARY_FLAG)) &&
06051         (flags & (BINCMP_FLAG | BINARY_FLAG))))
06052     return 0; /* One of the fields is binary and the other one isn't */
06053 
06054   return ((new_field->sql_type == real_type()) &&
06055           new_field->charset == field_charset &&
06056           new_field->length == max_length());
06057 }

Here is the call graph for this function:

uint32 Field_str::max_length (  )  [inline, virtual]

Implements Field.

Reimplemented in Field_null, and Field_blob.

Definition at line 422 of file field.h.

References Field::field_length.

Referenced by Field_varstring::is_equal(), and is_equal().

00422 { return field_length; }

Here is the caller graph for this function:

Item_result Field_str::result_type (  )  const [inline, virtual]

Implements Field.

Definition at line 412 of file field.h.

References STRING_RESULT.

00412 { return STRING_RESULT; }

void Field_str::set_charset ( CHARSET_INFO *  charset  )  [inline, virtual]

Reimplemented from Field.

Definition at line 420 of file field.h.

References charset(), and field_charset.

00420 { field_charset=charset; }

Here is the call graph for this function:

uint Field_str::size_of (  )  const [inline, virtual]

Implements Field.

Reimplemented in Field_null, Field_string, Field_varstring, Field_blob, and Field_enum.

Definition at line 418 of file field.h.

00418 { return sizeof(*this); }

int Field_str::store ( const char *  to,
uint  length,
CHARSET_INFO *  cs 
) [pure virtual]

Implements Field.

Implemented in Field_null, Field_timestamp, Field_date, Field_newdate, Field_time, Field_datetime, Field_string, Field_varstring, Field_blob, Field_enum, and Field_set.

int Field_str::store ( longlong  nr,
bool  unsigned_val 
) [pure virtual]

Implements Field.

Implemented in Field_null, Field_timestamp, Field_date, Field_newdate, Field_time, Field_datetime, Field_string, Field_varstring, Field_blob, Field_enum, and Field_set.

int Field_str::store ( double  nr  )  [virtual]

Implements Field.

Reimplemented in Field_null, Field_timestamp, Field_date, Field_newdate, Field_time, Field_datetime, Field_string, Field_varstring, Field_blob, Field_enum, and Field_set.

Definition at line 6004 of file field.cc.

References ASSERT_COLUMN_MARKED_FOR_WRITE, Field::char_length(), charset(), DBUG_ASSERT, DOUBLE_TO_STRING_CONVERSION_BUFFER_SIZE, FALSE, Field::field_length, log_10, max, charset_info_st::mbmaxlen, my_sprintf, and TRUE.

Referenced by Field_varstring::store(), Field_string::store(), Field_longstr::store_decimal(), and store_decimal().

06005 {
06006   ASSERT_COLUMN_MARKED_FOR_WRITE;
06007   char buff[DOUBLE_TO_STRING_CONVERSION_BUFFER_SIZE];
06008   uint length;
06009   bool use_scientific_notation= TRUE;
06010   uint char_length= field_length / charset()->mbmaxlen;
06011   /*
06012     Check fabs(nr) against longest value that can be stored in field,
06013     which depends on whether the value is < 1 or not, and negative or not
06014   */
06015   double anr= fabs(nr);
06016   int neg= (nr < 0.0) ? 1 : 0;
06017   if (char_length > 4 && char_length < 32 &&
06018       (anr < 1.0 ? anr > 1/(log_10[max(0,(int) char_length-neg-2)]) /* -2 for "0." */
06019                  : anr < log_10[char_length-neg]-1))
06020     use_scientific_notation= FALSE;
06021 
06022   length= (uint) my_sprintf(buff, (buff, "%-.*g",
06023                                    (use_scientific_notation ?
06024                                     max(0, (int)char_length-neg-5) :
06025                                     char_length),
06026                                    nr));
06027   /*
06028     +1 below is because "precision" in %g above means the
06029     max. number of significant digits, not the output width.
06030     Thus the width can be larger than number of significant digits by 1
06031     (for decimal point)
06032     the test for char_length < 5 is for extreme cases,
06033     like inserting 500.0 in char(1)
06034   */
06035   DBUG_ASSERT(char_length < 5 || length <= char_length+1);
06036   return store((const char *) buff, length, charset());
06037 }

Here is the call graph for this function:

Here is the caller graph for this function:

int Field_str::store_decimal ( const my_decimal *   )  [virtual]

Implements Field.

Reimplemented in Field_longstr, and Field_null.

Definition at line 1447 of file field.cc.

References ASSERT_COLUMN_MARKED_FOR_WRITE, E_DEC_FATAL_ERROR, E_DEC_OVERFLOW, err, my_decimal2double(), store(), and Field::warn_if_overflow().

01448 {
01449   ASSERT_COLUMN_MARKED_FOR_WRITE;
01450   double val;
01451   /* TODO: use decimal2string? */
01452   int err= warn_if_overflow(my_decimal2double(E_DEC_FATAL_ERROR &
01453                                             ~E_DEC_OVERFLOW, d, &val));
01454   return err | store(val);
01455 }

Here is the call graph for this function:

virtual bool Field_str::str_needs_quotes (  )  [inline, virtual]

Reimplemented from Field.

Definition at line 425 of file field.h.

References TRUE.

00425 { return TRUE; }

my_decimal * Field_str::val_decimal ( my_decimal *   )  [virtual]

Reimplemented from Field.

Reimplemented in Field_null, Field_string, Field_varstring, and Field_blob.

Definition at line 1458 of file field.cc.

References ASSERT_COLUMN_MARKED_FOR_READ, E_DEC_FATAL_ERROR, int2my_decimal(), and Field::val_int().

01459 {
01460   ASSERT_COLUMN_MARKED_FOR_READ;
01461   longlong nr= val_int();
01462   int2my_decimal(E_DEC_FATAL_ERROR, nr, 0, decimal_value);
01463   return decimal_value;
01464 }

Here is the call graph for this function:

Friends And Related Function Documentation

friend class create_field [friend]

Definition at line 423 of file field.h.

Member Data Documentation

CHARSET_INFO* Field_str::field_charset [protected]

Definition at line 407 of file field.h.

Referenced by binary(), charset(), Field_blob::cmp(), Field_string::cmp(), Field_varstring::cmp_max(), Field_enum::eq_def(), Field_str(), Field_blob::get_key_image(), Field_varstring::get_key_image(), Field_varstring::is_equal(), is_equal(), Field_varstring::key_cmp(), Field_blob::max_length(), Field_string::pack(), Field_blob::pack_cmp(), Field_varstring::pack_cmp(), Field_string::pack_cmp(), Field_blob::pack_key(), Field_varstring::pack_key(), set_charset(), Field_blob::set_key_image(), Field_varstring::set_key_image(), Field_varstring::sort_length(), Field_blob::sort_length(), Field_blob::sort_string(), Field_varstring::sort_string(), Field_string::sort_string(), Field_set::store(), Field_enum::store(), Field_blob::store(), Field_varstring::store(), Field_string::store(), Field_varstring::val_int(), and Field_varstring::val_real().

The documentation for this class was generated from the following files:
Generated on Sat Sep 9 21:05:23 2006 for MySQL 5.1 by  doxygen 1.4.7