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type_blob.result, func_system.result, func_str.result, ctype_collate.result:

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fixing test results accordingly.
func_system.test:
  New test that illegal mix of collations does not happen anymore.
item_strfunc.h:
    safe_charset_converter() was added for system constants.
item_strfunc.cc:
  safe_charset_converter() was added for system constants.
item_func.cc, item.h, item.cc:
  Bug#8291: Illegal collation mix with USER() function.
  After discussion with PeterG and Serge, a new coercibility
  level for "system constants" was introduced, between
  COERRIBLE and IMPLICIT. Thus:
  SELECT col1 = USER() FROM t1; - is done according to col1 collation.
  SELECT 'string' = USER(); - is done according to USER() collation.
  At the same time, "nagg" and "strong" members were removed as unused.
item_create.cc:
  Version is a system constant too.


sql/item.cc:
  Bug#8291: Illegal collation mix with USER() function.
  After discussion with PeterG and Serge, a new coercibility
  level for "system constants" was introduced, between
  COERRIBLE and IMPLICIT. Thus:
  SELECT col1 = USER() FROM t1; - is done according to col1 collation.
  SELECT 'string' = USER(); - is done according to USER() collation.
  At the same time, "nagg" and "strong" members were removed as unused.
sql/item.h:
  Bug#8291: Illegal collation mix with USER() function.
  After discussion with PeterG and Serge, a new coercibility
  level for "system constants" was introduced, between
  COERRIBLE and IMPLICIT. Thus:
  SELECT col1 = USER() FROM t1; - is done according to col1 collation.
  SELECT 'string' = USER(); - is done according to USER() collation.
  At the same time, "nagg" and "strong" members were removed as unused.
sql/item_create.cc:
  Version is a system constant too.
sql/item_func.cc:
  Bug#8291: Illegal collation mix with USER() function.
  After discussion with PeterG and Serge, a new coercibility
  level for "system constants" was introduced, between
  COERRIBLE and IMPLICIT. Thus:
  SELECT col1 = USER() FROM t1; - is done according to col1 collation.
  SELECT 'string' = USER(); - is done according to USER() collation.
  At the same time, "nagg" and "strong" members were removed as unused.
sql/item_strfunc.cc:
  safe_charset_converter() was added for system constants.
sql/item_strfunc.h:
    safe_charset_converter() was added for system constants.
mysql-test/t/func_system.test:
  New test that illegal mix of collations does not happen anymore.
mysql-test/r/ctype_collate.result:
  fixing test results accordingly.
mysql-test/r/func_str.result:
  fixing test results accordingly.
mysql-test/r/func_system.result:
  fixing test results accordingly.
mysql-test/r/type_blob.result:
  fixing test results accordingly.
This commit is contained in:
unknown 2005-03-04 14:20:49 +04:00
parent e54b545a96
commit c56d0283dd
11 changed files with 87 additions and 57 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
mysql-test/r/ctype_collate.result
View File

@ -514,7 +514,7 @@ Variable_name Value
character_set_client latin1 character_set_client latin1
SELECT charset('a'),collation('a'),coercibility('a'),'a'='A'; SELECT charset('a'),collation('a'),coercibility('a'),'a'='A';
charset('a') collation('a') coercibility('a') 'a'='A' charset('a') collation('a') coercibility('a') 'a'='A'
latin1 latin1_swedish_ci 3 1 latin1 latin1_swedish_ci 4 1
explain extended SELECT charset('a'),collation('a'),coercibility('a'),'a'='A'; explain extended SELECT charset('a'),collation('a'),coercibility('a'),'a'='A';
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
@ -525,7 +525,7 @@ SHOW VARIABLES LIKE 'collation_client';
Variable_name Value Variable_name Value
SELECT charset('a'),collation('a'),coercibility('a'),'a'='A'; SELECT charset('a'),collation('a'),coercibility('a'),'a'='A';
charset('a') collation('a') coercibility('a') 'a'='A' charset('a') collation('a') coercibility('a') 'a'='A'
latin1 latin1_swedish_ci 3 1 latin1 latin1_swedish_ci 4 1
SET CHARACTER SET 'DEFAULT'; SET CHARACTER SET 'DEFAULT';
ERROR 42000: Unknown character set: 'DEFAULT' ERROR 42000: Unknown character set: 'DEFAULT'
DROP TABLE t1; DROP TABLE t1;

62
mysql-test/r/func_str.result
View File

@ -464,97 +464,97 @@ select _latin1'B' COLLATE latin1_general_ci in (_latin1'a',_latin1'b' COLLATE la
ERROR HY000: Illegal mix of collations (latin1_general_ci,EXPLICIT), (latin1_swedish_ci,COERCIBLE), (latin1_bin,EXPLICIT) for operation ' IN ' ERROR HY000: Illegal mix of collations (latin1_general_ci,EXPLICIT), (latin1_swedish_ci,COERCIBLE), (latin1_bin,EXPLICIT) for operation ' IN '
select collation(bin(130)), coercibility(bin(130)); select collation(bin(130)), coercibility(bin(130));
collation(bin(130)) coercibility(bin(130)) collation(bin(130)) coercibility(bin(130))
latin1_swedish_ci 3 latin1_swedish_ci 4
select collation(oct(130)), coercibility(oct(130)); select collation(oct(130)), coercibility(oct(130));
collation(oct(130)) coercibility(oct(130)) collation(oct(130)) coercibility(oct(130))
latin1_swedish_ci 3 latin1_swedish_ci 4
select collation(conv(130,16,10)), coercibility(conv(130,16,10)); select collation(conv(130,16,10)), coercibility(conv(130,16,10));
collation(conv(130,16,10)) coercibility(conv(130,16,10)) collation(conv(130,16,10)) coercibility(conv(130,16,10))
latin1_swedish_ci 3 latin1_swedish_ci 4
select collation(hex(130)), coercibility(hex(130)); select collation(hex(130)), coercibility(hex(130));
collation(hex(130)) coercibility(hex(130)) collation(hex(130)) coercibility(hex(130))
latin1_swedish_ci 3 latin1_swedish_ci 4
select collation(char(130)), coercibility(hex(130)); select collation(char(130)), coercibility(hex(130));
collation(char(130)) coercibility(hex(130)) collation(char(130)) coercibility(hex(130))
latin1_swedish_ci 3 latin1_swedish_ci 4
select collation(format(130,10)), coercibility(format(130,10)); select collation(format(130,10)), coercibility(format(130,10));
collation(format(130,10)) coercibility(format(130,10)) collation(format(130,10)) coercibility(format(130,10))
latin1_swedish_ci 3 latin1_swedish_ci 4
select collation(lcase(_latin2'a')), coercibility(lcase(_latin2'a')); select collation(lcase(_latin2'a')), coercibility(lcase(_latin2'a'));
collation(lcase(_latin2'a')) coercibility(lcase(_latin2'a')) collation(lcase(_latin2'a')) coercibility(lcase(_latin2'a'))
latin2_general_ci 3 latin2_general_ci 4
select collation(ucase(_latin2'a')), coercibility(ucase(_latin2'a')); select collation(ucase(_latin2'a')), coercibility(ucase(_latin2'a'));
collation(ucase(_latin2'a')) coercibility(ucase(_latin2'a')) collation(ucase(_latin2'a')) coercibility(ucase(_latin2'a'))
latin2_general_ci 3 latin2_general_ci 4
select collation(left(_latin2'a',1)), coercibility(left(_latin2'a',1)); select collation(left(_latin2'a',1)), coercibility(left(_latin2'a',1));
collation(left(_latin2'a',1)) coercibility(left(_latin2'a',1)) collation(left(_latin2'a',1)) coercibility(left(_latin2'a',1))
latin2_general_ci 3 latin2_general_ci 4
select collation(right(_latin2'a',1)), coercibility(right(_latin2'a',1)); select collation(right(_latin2'a',1)), coercibility(right(_latin2'a',1));
collation(right(_latin2'a',1)) coercibility(right(_latin2'a',1)) collation(right(_latin2'a',1)) coercibility(right(_latin2'a',1))
latin2_general_ci 3 latin2_general_ci 4
select collation(substring(_latin2'a',1,1)), coercibility(substring(_latin2'a',1,1)); select collation(substring(_latin2'a',1,1)), coercibility(substring(_latin2'a',1,1));
collation(substring(_latin2'a',1,1)) coercibility(substring(_latin2'a',1,1)) collation(substring(_latin2'a',1,1)) coercibility(substring(_latin2'a',1,1))
latin2_general_ci 3 latin2_general_ci 4
select collation(concat(_latin2'a',_latin2'b')), coercibility(concat(_latin2'a',_latin2'b')); select collation(concat(_latin2'a',_latin2'b')), coercibility(concat(_latin2'a',_latin2'b'));
collation(concat(_latin2'a',_latin2'b')) coercibility(concat(_latin2'a',_latin2'b')) collation(concat(_latin2'a',_latin2'b')) coercibility(concat(_latin2'a',_latin2'b'))
latin2_general_ci 3 latin2_general_ci 4
select collation(lpad(_latin2'a',4,_latin2'b')), coercibility(lpad(_latin2'a',4,_latin2'b')); select collation(lpad(_latin2'a',4,_latin2'b')), coercibility(lpad(_latin2'a',4,_latin2'b'));
collation(lpad(_latin2'a',4,_latin2'b')) coercibility(lpad(_latin2'a',4,_latin2'b')) collation(lpad(_latin2'a',4,_latin2'b')) coercibility(lpad(_latin2'a',4,_latin2'b'))
latin2_general_ci 3 latin2_general_ci 4
select collation(rpad(_latin2'a',4,_latin2'b')), coercibility(rpad(_latin2'a',4,_latin2'b')); select collation(rpad(_latin2'a',4,_latin2'b')), coercibility(rpad(_latin2'a',4,_latin2'b'));
collation(rpad(_latin2'a',4,_latin2'b')) coercibility(rpad(_latin2'a',4,_latin2'b')) collation(rpad(_latin2'a',4,_latin2'b')) coercibility(rpad(_latin2'a',4,_latin2'b'))
latin2_general_ci 3 latin2_general_ci 4
select collation(concat_ws(_latin2'a',_latin2'b')), coercibility(concat_ws(_latin2'a',_latin2'b')); select collation(concat_ws(_latin2'a',_latin2'b')), coercibility(concat_ws(_latin2'a',_latin2'b'));
collation(concat_ws(_latin2'a',_latin2'b')) coercibility(concat_ws(_latin2'a',_latin2'b')) collation(concat_ws(_latin2'a',_latin2'b')) coercibility(concat_ws(_latin2'a',_latin2'b'))
latin2_general_ci 3 latin2_general_ci 4
select collation(make_set(255,_latin2'a',_latin2'b',_latin2'c')), coercibility(make_set(255,_latin2'a',_latin2'b',_latin2'c')); select collation(make_set(255,_latin2'a',_latin2'b',_latin2'c')), coercibility(make_set(255,_latin2'a',_latin2'b',_latin2'c'));
collation(make_set(255,_latin2'a',_latin2'b',_latin2'c')) coercibility(make_set(255,_latin2'a',_latin2'b',_latin2'c')) collation(make_set(255,_latin2'a',_latin2'b',_latin2'c')) coercibility(make_set(255,_latin2'a',_latin2'b',_latin2'c'))
latin2_general_ci 3 latin2_general_ci 4
select collation(export_set(255,_latin2'y',_latin2'n',_latin2' ')), coercibility(export_set(255,_latin2'y',_latin2'n',_latin2' ')); select collation(export_set(255,_latin2'y',_latin2'n',_latin2' ')), coercibility(export_set(255,_latin2'y',_latin2'n',_latin2' '));
collation(export_set(255,_latin2'y',_latin2'n',_latin2' ')) coercibility(export_set(255,_latin2'y',_latin2'n',_latin2' ')) collation(export_set(255,_latin2'y',_latin2'n',_latin2' ')) coercibility(export_set(255,_latin2'y',_latin2'n',_latin2' '))
binary 3 binary 4
select collation(trim(_latin2' a ')), coercibility(trim(_latin2' a ')); select collation(trim(_latin2' a ')), coercibility(trim(_latin2' a '));
collation(trim(_latin2' a ')) coercibility(trim(_latin2' a ')) collation(trim(_latin2' a ')) coercibility(trim(_latin2' a '))
latin2_general_ci 3 latin2_general_ci 4
select collation(ltrim(_latin2' a ')), coercibility(ltrim(_latin2' a ')); select collation(ltrim(_latin2' a ')), coercibility(ltrim(_latin2' a '));
collation(ltrim(_latin2' a ')) coercibility(ltrim(_latin2' a ')) collation(ltrim(_latin2' a ')) coercibility(ltrim(_latin2' a '))
latin2_general_ci 3 latin2_general_ci 4
select collation(rtrim(_latin2' a ')), coercibility(rtrim(_latin2' a ')); select collation(rtrim(_latin2' a ')), coercibility(rtrim(_latin2' a '));
collation(rtrim(_latin2' a ')) coercibility(rtrim(_latin2' a ')) collation(rtrim(_latin2' a ')) coercibility(rtrim(_latin2' a '))
latin2_general_ci 3 latin2_general_ci 4
select collation(trim(LEADING _latin2' ' FROM _latin2'a')), coercibility(trim(LEADING _latin2'a' FROM _latin2'a')); select collation(trim(LEADING _latin2' ' FROM _latin2'a')), coercibility(trim(LEADING _latin2'a' FROM _latin2'a'));
collation(trim(LEADING _latin2' ' FROM _latin2'a')) coercibility(trim(LEADING _latin2'a' FROM _latin2'a')) collation(trim(LEADING _latin2' ' FROM _latin2'a')) coercibility(trim(LEADING _latin2'a' FROM _latin2'a'))
latin2_general_ci 3 latin2_general_ci 4
select collation(trim(TRAILING _latin2' ' FROM _latin2'a')), coercibility(trim(TRAILING _latin2'a' FROM _latin2'a')); select collation(trim(TRAILING _latin2' ' FROM _latin2'a')), coercibility(trim(TRAILING _latin2'a' FROM _latin2'a'));
collation(trim(TRAILING _latin2' ' FROM _latin2'a')) coercibility(trim(TRAILING _latin2'a' FROM _latin2'a')) collation(trim(TRAILING _latin2' ' FROM _latin2'a')) coercibility(trim(TRAILING _latin2'a' FROM _latin2'a'))
latin2_general_ci 3 latin2_general_ci 4
select collation(trim(BOTH _latin2' ' FROM _latin2'a')), coercibility(trim(BOTH _latin2'a' FROM _latin2'a')); select collation(trim(BOTH _latin2' ' FROM _latin2'a')), coercibility(trim(BOTH _latin2'a' FROM _latin2'a'));
collation(trim(BOTH _latin2' ' FROM _latin2'a')) coercibility(trim(BOTH _latin2'a' FROM _latin2'a')) collation(trim(BOTH _latin2' ' FROM _latin2'a')) coercibility(trim(BOTH _latin2'a' FROM _latin2'a'))
latin2_general_ci 3 latin2_general_ci 4
select collation(repeat(_latin2'a',10)), coercibility(repeat(_latin2'a',10)); select collation(repeat(_latin2'a',10)), coercibility(repeat(_latin2'a',10));
collation(repeat(_latin2'a',10)) coercibility(repeat(_latin2'a',10)) collation(repeat(_latin2'a',10)) coercibility(repeat(_latin2'a',10))
latin2_general_ci 3 latin2_general_ci 4
select collation(reverse(_latin2'ab')), coercibility(reverse(_latin2'ab')); select collation(reverse(_latin2'ab')), coercibility(reverse(_latin2'ab'));
collation(reverse(_latin2'ab')) coercibility(reverse(_latin2'ab')) collation(reverse(_latin2'ab')) coercibility(reverse(_latin2'ab'))
latin2_general_ci 3 latin2_general_ci 4
select collation(quote(_latin2'ab')), coercibility(quote(_latin2'ab')); select collation(quote(_latin2'ab')), coercibility(quote(_latin2'ab'));
collation(quote(_latin2'ab')) coercibility(quote(_latin2'ab')) collation(quote(_latin2'ab')) coercibility(quote(_latin2'ab'))
latin2_general_ci 3 latin2_general_ci 4
select collation(soundex(_latin2'ab')), coercibility(soundex(_latin2'ab')); select collation(soundex(_latin2'ab')), coercibility(soundex(_latin2'ab'));
collation(soundex(_latin2'ab')) coercibility(soundex(_latin2'ab')) collation(soundex(_latin2'ab')) coercibility(soundex(_latin2'ab'))
latin2_general_ci 3 latin2_general_ci 4
select collation(substring(_latin2'ab',1)), coercibility(substring(_latin2'ab',1)); select collation(substring(_latin2'ab',1)), coercibility(substring(_latin2'ab',1));
collation(substring(_latin2'ab',1)) coercibility(substring(_latin2'ab',1)) collation(substring(_latin2'ab',1)) coercibility(substring(_latin2'ab',1))
latin2_general_ci 3 latin2_general_ci 4
select collation(insert(_latin2'abcd',2,3,_latin2'ef')), coercibility(insert(_latin2'abcd',2,3,_latin2'ef')); select collation(insert(_latin2'abcd',2,3,_latin2'ef')), coercibility(insert(_latin2'abcd',2,3,_latin2'ef'));
collation(insert(_latin2'abcd',2,3,_latin2'ef')) coercibility(insert(_latin2'abcd',2,3,_latin2'ef')) collation(insert(_latin2'abcd',2,3,_latin2'ef')) coercibility(insert(_latin2'abcd',2,3,_latin2'ef'))
latin2_general_ci 3 latin2_general_ci 4
select collation(replace(_latin2'abcd',_latin2'b',_latin2'B')), coercibility(replace(_latin2'abcd',_latin2'b',_latin2'B')); select collation(replace(_latin2'abcd',_latin2'b',_latin2'B')), coercibility(replace(_latin2'abcd',_latin2'b',_latin2'B'));
collation(replace(_latin2'abcd',_latin2'b',_latin2'B')) coercibility(replace(_latin2'abcd',_latin2'b',_latin2'B')) collation(replace(_latin2'abcd',_latin2'b',_latin2'B')) coercibility(replace(_latin2'abcd',_latin2'b',_latin2'B'))
latin2_general_ci 3 latin2_general_ci 4
select collation(encode('abcd','ab')), coercibility(encode('abcd','ab')); select collation(encode('abcd','ab')), coercibility(encode('abcd','ab'));
collation(encode('abcd','ab')) coercibility(encode('abcd','ab')) collation(encode('abcd','ab')) coercibility(encode('abcd','ab'))
binary 3 binary 4
create table t1 create table t1
select select
bin(130), bin(130),

8
mysql-test/r/func_system.result
View File

@ -68,3 +68,11 @@ drop table t1;
select TRUE,FALSE,NULL; select TRUE,FALSE,NULL;
TRUE FALSE NULL TRUE FALSE NULL
1 0 NULL 1 0 NULL
create table t1 (a char(10)) character set latin1;
select * from t1 where a=version();
a
select * from t1 where a=database();
a
select * from t1 where a=user();
a
drop table t1;

2
mysql-test/r/type_blob.result
View File

@ -499,7 +499,7 @@ charset(load_file('../../std_data/words.dat')),
collation(load_file('../../std_data/words.dat')), collation(load_file('../../std_data/words.dat')),
coercibility(load_file('../../std_data/words.dat')); coercibility(load_file('../../std_data/words.dat'));
charset(load_file('../../std_data/words.dat')) collation(load_file('../../std_data/words.dat')) coercibility(load_file('../../std_data/words.dat')) charset(load_file('../../std_data/words.dat')) collation(load_file('../../std_data/words.dat')) coercibility(load_file('../../std_data/words.dat'))
binary binary 3 binary binary 4
explain extended select explain extended select
charset(load_file('../../std_data/words.dat')), charset(load_file('../../std_data/words.dat')),
collation(load_file('../../std_data/words.dat')), collation(load_file('../../std_data/words.dat')),

9
mysql-test/t/func_system.test
View File

@ -30,3 +30,12 @@ show create table t1;
drop table t1; drop table t1;
select TRUE,FALSE,NULL; select TRUE,FALSE,NULL;
#
# Bug#8291 Illegal collation mix with USER() function
#
create table t1 (a char(10)) character set latin1;
select * from t1 where a=version();
select * from t1 where a=database();
select * from t1 where a=user();
drop table t1;

10
sql/item.cc
View File

@ -384,7 +384,6 @@ void Item::split_sum_func2(THD *thd, Item **ref_pointer_array,
*/ */
bool DTCollation::aggregate(DTCollation &dt, uint flags) bool DTCollation::aggregate(DTCollation &dt, uint flags)
{ {
nagg++;
if (!my_charset_same(collation, dt.collation)) if (!my_charset_same(collation, dt.collation))
{ {
/* /*
@ -400,7 +399,6 @@ bool DTCollation::aggregate(DTCollation &dt, uint flags)
else else
{ {
set(dt); set(dt);
strong= nagg;
} }
} }
else if (dt.collation == &my_charset_bin) else if (dt.collation == &my_charset_bin)
@ -408,7 +406,6 @@ bool DTCollation::aggregate(DTCollation &dt, uint flags)
if (dt.derivation <= derivation) if (dt.derivation <= derivation)
{ {
set(dt); set(dt);
strong= nagg;
} }
else else
; // Do nothing ; // Do nothing
@ -424,20 +421,18 @@ bool DTCollation::aggregate(DTCollation &dt, uint flags)
dt.collation->state & MY_CS_UNICODE) dt.collation->state & MY_CS_UNICODE)
{ {
set(dt); set(dt);
strong= nagg;
} }
else if ((flags & MY_COLL_ALLOW_COERCIBLE_CONV) && else if ((flags & MY_COLL_ALLOW_COERCIBLE_CONV) &&
derivation < dt.derivation && derivation < dt.derivation &&
dt.derivation >= DERIVATION_COERCIBLE) dt.derivation >= DERIVATION_SYSCONST)
{ {
// Do nothing; // Do nothing;
} }
else if ((flags & MY_COLL_ALLOW_COERCIBLE_CONV) && else if ((flags & MY_COLL_ALLOW_COERCIBLE_CONV) &&
dt.derivation < derivation && dt.derivation < derivation &&
derivation >= DERIVATION_COERCIBLE) derivation >= DERIVATION_SYSCONST)
{ {
set(dt); set(dt);
strong= nagg;
} }
else else
{ {
@ -453,7 +448,6 @@ bool DTCollation::aggregate(DTCollation &dt, uint flags)
else if (dt.derivation < derivation) else if (dt.derivation < derivation)
{ {
set(dt); set(dt);
strong= nagg;
} }
else else
{ {

12
sql/item.h
View File

@ -31,8 +31,9 @@ void item_init(void); /* Init item functions */
enum Derivation enum Derivation
{ {
DERIVATION_IGNORABLE= 4, DERIVATION_IGNORABLE= 5,
DERIVATION_COERCIBLE= 3, DERIVATION_COERCIBLE= 4,
DERIVATION_SYSCONST= 3,
DERIVATION_IMPLICIT= 2, DERIVATION_IMPLICIT= 2,
DERIVATION_NONE= 1, DERIVATION_NONE= 1,
DERIVATION_EXPLICIT= 0 DERIVATION_EXPLICIT= 0
@ -61,22 +62,16 @@ class DTCollation {
public: public:
CHARSET_INFO *collation; CHARSET_INFO *collation;
enum Derivation derivation; enum Derivation derivation;
uint nagg; // Total number of aggregated collations.
uint strong; // Number of the strongest collation.
DTCollation() DTCollation()
{ {
collation= &my_charset_bin; collation= &my_charset_bin;
derivation= DERIVATION_NONE; derivation= DERIVATION_NONE;
nagg= 0;
strong= 0;
} }
DTCollation(CHARSET_INFO *collation_arg, Derivation derivation_arg) DTCollation(CHARSET_INFO *collation_arg, Derivation derivation_arg)
{ {
collation= collation_arg; collation= collation_arg;
derivation= derivation_arg; derivation= derivation_arg;
nagg= 0;
strong= 0;
} }
void set(DTCollation &dt) void set(DTCollation &dt)
{ {
@ -102,6 +97,7 @@ public:
case DERIVATION_IGNORABLE: return "IGNORABLE"; case DERIVATION_IGNORABLE: return "IGNORABLE";
case DERIVATION_COERCIBLE: return "COERCIBLE"; case DERIVATION_COERCIBLE: return "COERCIBLE";
case DERIVATION_IMPLICIT: return "IMPLICIT"; case DERIVATION_IMPLICIT: return "IMPLICIT";
case DERIVATION_SYSCONST: return "SYSCONST";
case DERIVATION_EXPLICIT: return "EXPLICIT"; case DERIVATION_EXPLICIT: return "EXPLICIT";
case DERIVATION_NONE: return "NONE"; case DERIVATION_NONE: return "NONE";
default: return "UNKNOWN"; default: return "UNKNOWN";

2
sql/item_create.cc
View File

@ -441,7 +441,7 @@ Item *create_func_version(void)
{ {
return new Item_string(NullS,server_version, return new Item_string(NullS,server_version,
(uint) strlen(server_version), (uint) strlen(server_version),
system_charset_info, DERIVATION_IMPLICIT); system_charset_info, DERIVATION_SYSCONST);
} }
Item *create_func_weekday(Item* a) Item *create_func_weekday(Item* a)

2
sql/item_func.cc
View File

@ -79,8 +79,6 @@ bool Item_func::agg_arg_collations(DTCollation &c, Item **av, uint count,
uint flags) uint flags)
{ {
uint i; uint i;
c.nagg= 0;
c.strong= 0;
c.set(av[0]->collation); c.set(av[0]->collation);
for (i= 1; i < count; i++) for (i= 1; i < count; i++)
{ {

17
sql/item_strfunc.cc
View File

@ -1509,6 +1509,23 @@ String *Item_func_decode::val_str(String *str)
} }
Item *Item_func_sysconst::safe_charset_converter(CHARSET_INFO *tocs)
{
Item_string *conv;
uint conv_errors;
String tmp, cstr, *ostr= val_str(&tmp);
cstr.copy(ostr->ptr(), ostr->length(), ostr->charset(), tocs, &conv_errors);
if (conv_errors || !(conv= new Item_string(cstr.ptr(), cstr.length(),
cstr.charset(),
collation.derivation)))
{
return NULL;
}
conv->str_value.copy();
return conv;
}
String *Item_func_database::val_str(String *str) String *Item_func_database::val_str(String *str)
{ {
DBUG_ASSERT(fixed == 1); DBUG_ASSERT(fixed == 1);

16
sql/item_strfunc.h
View File

@ -337,10 +337,18 @@ public:
}; };
class Item_func_database :public Item_str_func class Item_func_sysconst :public Item_str_func
{ {
public: public:
Item_func_database() { collation.set(system_charset_info,DERIVATION_IMPLICIT); } Item_func_sysconst()
{ collation.set(system_charset_info,DERIVATION_SYSCONST); }
Item *safe_charset_converter(CHARSET_INFO *tocs);
};
class Item_func_database :public Item_func_sysconst
{
public:
Item_func_database() :Item_func_sysconst() {}
String *val_str(String *); String *val_str(String *);
void fix_length_and_dec() void fix_length_and_dec()
{ {
@ -350,10 +358,10 @@ public:
const char *func_name() const { return "database"; } const char *func_name() const { return "database"; }
}; };
class Item_func_user :public Item_str_func class Item_func_user :public Item_func_sysconst
{ {
public: public:
Item_func_user() { collation.set(system_charset_info, DERIVATION_IMPLICIT); } Item_func_user() :Item_func_sysconst() {}
String *val_str(String *); String *val_str(String *);
void fix_length_and_dec() void fix_length_and_dec()
{ {