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MySQL 5.1: DTCollation Class Reference

DTCollation Class Reference

#include <item.h>

Collaboration diagram for DTCollation:

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List of all members.

Public Member Functions

 DTCollation ()
 DTCollation (CHARSET_INFO *collation_arg, Derivation derivation_arg)
void set (DTCollation &dt)
void set (CHARSET_INFO *collation_arg, Derivation derivation_arg)
void set (CHARSET_INFO *collation_arg)
void set (Derivation derivation_arg)
bool aggregate (DTCollation &dt, uint flags=0)
bool set (DTCollation &dt1, DTCollation &dt2, uint flags=0)
const char * derivation_name () const

Public Attributes

CHARSET_INFO * collation
enum Derivation derivation

Detailed Description

Definition at line 61 of file item.h.

Constructor & Destructor Documentation

DTCollation::DTCollation (  )  [inline]

Definition at line 66 of file item.h.

References collation, derivation, DERIVATION_NONE, and my_charset_bin.

00067   {
00068     collation= &my_charset_bin;
00069     derivation= DERIVATION_NONE;
00070   }

DTCollation::DTCollation ( CHARSET_INFO *  collation_arg,
Derivation  derivation_arg 
) [inline]

Definition at line 71 of file item.h.

References collation, and derivation.

00072   {
00073     collation= collation_arg;
00074     derivation= derivation_arg;
00075   }

Member Function Documentation

bool DTCollation::aggregate ( DTCollation &  dt,
uint  flags = 0 
)

Definition at line 1229 of file item.cc.

References collation, charset_info_st::csname, derivation, DERIVATION_EXPLICIT, DERIVATION_NONE, DERIVATION_SYSCONST, get_charset_by_csname(), my_charset_bin, my_charset_same(), MY_COLL_ALLOW_COERCIBLE_CONV, MY_COLL_ALLOW_SUPERSET_CONV, MY_CS_BINSORT, MY_CS_UNICODE, MYF, set(), and charset_info_st::state.

Referenced by agg_item_collations(), Item_type_holder::join_types(), and set().

01230 {
01231   if (!my_charset_same(collation, dt.collation))
01232   {
01233     /* 
01234        We do allow to use binary strings (like BLOBS)
01235        together with character strings.
01236        Binaries have more precedence than a character
01237        string of the same derivation.
01238     */
01239     if (collation == &my_charset_bin)
01240     {
01241       if (derivation <= dt.derivation)
01242         ; // Do nothing
01243       else
01244       {
01245         set(dt); 
01246       }
01247     }
01248     else if (dt.collation == &my_charset_bin)
01249     {
01250       if (dt.derivation <= derivation)
01251       {
01252         set(dt);
01253       }
01254       else
01255        ; // Do nothing
01256     }
01257     else if ((flags & MY_COLL_ALLOW_SUPERSET_CONV) &&
01258              collation->state & MY_CS_UNICODE &&
01259              (derivation < dt.derivation ||
01260              (derivation == dt.derivation &&
01261              !(dt.collation->state & MY_CS_UNICODE))))
01262     {
01263       // Do nothing
01264     }
01265     else if ((flags & MY_COLL_ALLOW_SUPERSET_CONV) &&
01266              dt.collation->state & MY_CS_UNICODE &&
01267              (dt.derivation < derivation ||
01268               (dt.derivation == derivation &&
01269              !(collation->state & MY_CS_UNICODE))))
01270     {
01271       set(dt);
01272     }
01273     else if ((flags & MY_COLL_ALLOW_COERCIBLE_CONV) &&
01274              derivation < dt.derivation &&
01275              dt.derivation >= DERIVATION_SYSCONST)
01276     {
01277       // Do nothing;
01278     }
01279     else if ((flags & MY_COLL_ALLOW_COERCIBLE_CONV) &&
01280              dt.derivation < derivation &&
01281              derivation >= DERIVATION_SYSCONST)
01282     {
01283       set(dt);
01284     }
01285     else
01286     {
01287       // Cannot apply conversion
01288       set(0, DERIVATION_NONE);
01289       return 1;
01290     }
01291   }
01292   else if (derivation < dt.derivation)
01293   {
01294     // Do nothing
01295   }
01296   else if (dt.derivation < derivation)
01297   {
01298     set(dt);
01299   }
01300   else
01301   { 
01302     if (collation == dt.collation)
01303     {
01304       // Do nothing
01305     }
01306     else 
01307     {
01308       if (derivation == DERIVATION_EXPLICIT)
01309       {
01310         set(0, DERIVATION_NONE);
01311         return 1;
01312       }
01313       if (collation->state & MY_CS_BINSORT)
01314         return 0;
01315       if (dt.collation->state & MY_CS_BINSORT)
01316       {
01317         set(dt);
01318         return 0;
01319       }
01320       CHARSET_INFO *bin= get_charset_by_csname(collation->csname, 
01321                                                MY_CS_BINSORT,MYF(0));
01322       set(bin, DERIVATION_NONE);
01323     }
01324   }
01325   return 0;
01326 }

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const char* DTCollation::derivation_name (  )  const [inline]

Definition at line 93 of file item.h.

References derivation, DERIVATION_COERCIBLE, DERIVATION_EXPLICIT, DERIVATION_IGNORABLE, DERIVATION_IMPLICIT, DERIVATION_NONE, and DERIVATION_SYSCONST.

Referenced by Item_type_holder::join_types(), and my_coll_agg_error().

00094   {
00095     switch(derivation)
00096     {
00097       case DERIVATION_IGNORABLE: return "IGNORABLE";
00098       case DERIVATION_COERCIBLE: return "COERCIBLE";
00099       case DERIVATION_IMPLICIT:  return "IMPLICIT";
00100       case DERIVATION_SYSCONST:  return "SYSCONST";
00101       case DERIVATION_EXPLICIT:  return "EXPLICIT";
00102       case DERIVATION_NONE:      return "NONE";
00103       default: return "UNKNOWN";
00104     }
00105   }

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bool DTCollation::set ( DTCollation &  dt1,
DTCollation &  dt2,
uint  flags = 0 
) [inline]

Definition at line 91 of file item.h.

References aggregate(), flags, and set().

00092   { set(dt1); return aggregate(dt2, flags); }

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void DTCollation::set ( Derivation  derivation_arg  )  [inline]

Definition at line 88 of file item.h.

References derivation.

00089   { derivation= derivation_arg; }

void DTCollation::set ( CHARSET_INFO *  collation_arg  )  [inline]

Definition at line 86 of file item.h.

References collation.

00087   { collation= collation_arg; }

void DTCollation::set ( CHARSET_INFO *  collation_arg,
Derivation  derivation_arg 
) [inline]

Definition at line 81 of file item.h.

References collation, and derivation.

00082   {
00083     collation= collation_arg;
00084     derivation= derivation_arg;
00085   }

void DTCollation::set ( DTCollation &  dt  )  [inline]

Definition at line 76 of file item.h.

References collation, and derivation.

Referenced by agg_item_collations(), aggregate(), Item_param::convert_str_value(), Item_sum_hybrid::fix_fields(), Item_func_set_user_var::fix_fields(), Item_sp_variable::fix_fields(), Item_date_typecast::fix_length_and_dec(), Item_typecast_maybe_null::fix_length_and_dec(), Item_typecast::fix_length_and_dec(), Item_func_sec_to_time::fix_length_and_dec(), Item_date::fix_length_and_dec(), Item_func_dayname::fix_length_and_dec(), Item_func_weekday::fix_length_and_dec(), Item_func_monthname::fix_length_and_dec(), Item_func_month::fix_length_and_dec(), Item_char_typecast::fix_length_and_dec(), Item_date_add_interval::fix_length_and_dec(), Item_func_convert_tz::fix_length_and_dec(), Item_func_from_unixtime::fix_length_and_dec(), Item_func_date_format::fix_length_and_dec(), Item_func_sysdate_local::fix_length_and_dec(), Item_func_now::fix_length_and_dec(), Item_func_curtime::fix_length_and_dec(), Item_func_curdate::fix_length_and_dec(), subselect_union_engine::fix_length_and_dec(), subselect_single_select_engine::fix_length_and_dec(), Item_func_uuid::fix_length_and_dec(), Item_func_collation::fix_length_and_dec(), Item_func_charset::fix_length_and_dec(), Item_func_quote::fix_length_and_dec(), Item_load_file::fix_length_and_dec(), Item_func_binary::fix_length_and_dec(), Item_func_unhex::fix_length_and_dec(), Item_func_hex::fix_length_and_dec(), Item_func_conv::fix_length_and_dec(), Item_func_format::fix_length_and_dec(), Item_func_ucase::fix_length_and_dec(), Item_func_lcase::fix_length_and_dec(), Item_func_set_collation::fix_length_and_dec(), Item_func_conv_charset::fix_length_and_dec(), Item_func_repeat::fix_length_and_dec(), Item_func_soundex::fix_length_and_dec(), Item_func_encode::fix_length_and_dec(), Item_func_trim::fix_length_and_dec(), Item_func_substr::fix_length_and_dec(), Item_func_right::fix_length_and_dec(), Item_func_left::fix_length_and_dec(), Item_func_reverse::fix_length_and_dec(), Item_func_sha::fix_length_and_dec(), Item_func_md5::fix_length_and_dec(), Item_func_sp::fix_length_and_dec(), Item_func_get_user_var::fix_length_and_dec(), Item_func_set_user_var::fix_length_and_dec(), Item_func_if::fix_length_and_dec(), sys_var::item(), Item_bin_string::Item_bin_string(), Item_field::Item_field(), Item_func_char::Item_func_char(), Item_func_sysconst::Item_func_sysconst(), Item_hex_string::Item_hex_string(), Item_null::Item_null(), Item_string::Item_string(), Item_sum_hybrid::Item_sum_hybrid(), Item_type_holder::Item_type_holder(), Item_param::reset(), Item_null::safe_charset_converter(), set(), Arg_comparator::set_compare_func(), Item_field::set_field(), Item_ref::set_properties(), and Item_cache::setup().

00077   { 
00078     collation= dt.collation;
00079     derivation= dt.derivation;
00080   }

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Member Data Documentation

CHARSET_INFO* DTCollation::collation

Definition at line 63 of file item.h.

Referenced by field_str::add(), Item_sum_max::add(), Item_sum_min::add(), agg_item_charsets(), aggregate(), change_cond_ref_to_const(), Cached_item_str::cmp(), Item_equal::compare_collation(), Item_func_isnotnull::compare_collation(), Item_func_isnull::compare_collation(), Item_func_in::compare_collation(), Item_func_case::compare_collation(), Item_func_between::compare_collation(), Item_bool_func2::compare_collation(), Arg_comparator::compare_e_string(), Arg_comparator::compare_string(), Item_sum_hybrid::create_tmp_field(), Item_sum::create_tmp_field(), create_tmp_field_for_schema(), create_tmp_field_from_item(), DTCollation(), Item_func_set_collation::eq(), Item_hex_string::eq(), Item_param::eq(), Item_string::eq(), Item_func_group_concat::field_type(), Item_func_case::find_item(), Item_func_set_user_var::fix_fields(), Item_func_like::fix_fields(), Item_sp_variable::fix_fields(), Item_xml_str_func::fix_length_and_dec(), Item_nodeset_func::fix_length_and_dec(), Item_char_typecast::fix_length_and_dec(), Item_func_collation::fix_length_and_dec(), Item_func_charset::fix_length_and_dec(), Item_func_hex::fix_length_and_dec(), Item_func_char::fix_length_and_dec(), Item_func_format::fix_length_and_dec(), Item_func_ucase::fix_length_and_dec(), Item_func_lcase::fix_length_and_dec(), Item_func_set_collation::fix_length_and_dec(), Item_func_lpad::fix_length_and_dec(), Item_func_rpad::fix_length_and_dec(), Item_func_trim::fix_length_and_dec(), Item_func_substr::fix_length_and_dec(), Item_func_concat::fix_length_and_dec(), Item_func_sha::fix_length_and_dec(), Item_func_md5::fix_length_and_dec(), Item_func_set_user_var::fix_length_and_dec(), Item_equal::fix_length_and_dec(), Item_func_in::fix_length_and_dec(), Item_func_if::fix_length_and_dec(), field_str::get_opt_type(), Item::init_make_field(), Item_func_match::init_search(), Item_func_conv_charset::Item_func_conv_charset(), Item_type_holder::join_types(), Item_str_func::left_right_max_length(), Item_type_holder::make_field_by_type(), make_sortkey(), Item::make_string_field(), Item_sum_hybrid::min_max_update_str_field(), my_coll_agg_error(), mysql_prepare_table(), Item_string::new_item(), Item_string::print(), Item_hex_string::save_in_field(), Item_string::save_in_field(), Item::save_in_field(), Item_copy_string::save_in_field(), Protocol::send_fields(), in_string::set(), set(), Arg_comparator::set_compare_func(), Item_string::set_str_with_copy(), Item_cache_str::store(), cmp_item_row::store_value(), Item_func_ifnull::str_op(), Item::tmp_table_field_from_field_type(), Item_func_like::turboBM_compute_bad_character_shifts(), Item_func_like::turboBM_compute_suffixes(), Item_func_like::turboBM_matches(), Item_nodeset_to_const_comparator::val_int(), Item_func_find_in_set::val_int(), Item_func_field::val_int(), Item_func_locate::val_int(), Item_func_like::val_int(), Item_func_between::val_int(), Item_func_strcmp::val_int(), Item_func_xpath_sum::val_real(), Item_func_xml_update::val_str(), Item_nodeset_func::val_str(), Item_typecast::val_str(), Item_func_quote::val_str(), Item_func_export_set::val_str(), Item_func_collation::val_str(), Item_func_charset::val_str(), Item_func_set_collation::val_str(), Item_func_lpad::val_str(), Item_func_rpad::val_str(), Item_func_char::val_str(), Item_func_elt::val_str(), Item_func_soundex::val_str(), Item_func_substr_index::val_str(), Item_str_conv::val_str(), Item_func_replace::val_str(), Item_func_concat_ws::val_str(), Item_func_concat::val_str(), Item_func_min_max::val_str(), and Item_func_if::val_str().

enum Derivation DTCollation::derivation

Definition at line 64 of file item.h.

Referenced by agg_item_collations(), aggregate(), derivation_name(), DTCollation(), Item_sp_variable::fix_fields(), Item_func_sysconst::safe_charset_converter(), Item_static_string_func::safe_charset_converter(), Item_string::safe_charset_converter(), set(), Arg_comparator::set_compare_func(), and Item_func_coercibility::val_int().

The documentation for this class was generated from the following files:
Generated on Sat Sep 9 20:52:08 2006 for MySQL 5.1 by  doxygen 1.4.7