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CAST(expr AS char) now supports character set with conversion:

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SELECT CAST(_latin1'string' AS CHAR CHARACTER SET latin2)
This commit is contained in:
unknown
2003-05-28 17:57:58 +05:00
parent 9166602342
commit 5f9d3e4276
5 changed files with 41 additions and 14 deletions
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13
mysql-test/r/cast.result
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@@ -28,6 +28,19 @@ cast("2001-1-1" as DATE) cast("2001-1-1" as DATETIME)
select cast("1:2:3" as TIME); select cast("1:2:3" as TIME);
cast("1:2:3" as TIME) cast("1:2:3" as TIME)
01:02:03 01:02:03
select cast(_latin1'test' as char character set latin2);
cast(_latin1'test' as char character set latin2)
test
select cast(_koi8r'<27><><EFBFBD><EFBFBD>' as char character set cp1251);
cast(_koi8r'<27><><EFBFBD><EFBFBD>' as char character set cp1251)
<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
create table t1 select cast(_koi8r'<27><><EFBFBD><EFBFBD>' as char character set cp1251) as t;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`t` char(4) character set cp1251 NOT NULL default ''
) TYPE=MyISAM CHARSET=latin1
drop table t1;
select cast("2001-1-1" as date) = "2001-01-01"; select cast("2001-1-1" as date) = "2001-01-01";
cast("2001-1-1" as date) = "2001-01-01" cast("2001-1-1" as date) = "2001-01-01"
0 0

9
mysql-test/t/cast.test
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@@ -13,6 +13,15 @@ select cast("A" as binary) = "a", cast(BINARY "a" as CHAR) = "A";
select cast("2001-1-1" as DATE), cast("2001-1-1" as DATETIME); select cast("2001-1-1" as DATE), cast("2001-1-1" as DATETIME);
select cast("1:2:3" as TIME); select cast("1:2:3" as TIME);
#
# Character set convertion
#
select cast(_latin1'test' as char character set latin2);
select cast(_koi8r'<27><><EFBFBD><EFBFBD>' as char character set cp1251);
create table t1 select cast(_koi8r'<27><><EFBFBD><EFBFBD>' as char character set cp1251) as t;
show create table t1;
drop table t1;
# #
# The following should be fixed in 4.1 # The following should be fixed in 4.1
# #

7
sql/item_create.cc
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@@ -457,13 +457,16 @@ Item *create_load_file(Item* a)
} }
Item *create_func_cast(Item *a, Item_cast cast_type) Item *create_func_cast(Item *a, Item_cast cast_type, CHARSET_INFO *cs)
{ {
Item *res; Item *res;
LINT_INIT(res); LINT_INIT(res);
switch (cast_type) { switch (cast_type) {
case ITEM_CAST_BINARY: res= new Item_func_binary(a); break; case ITEM_CAST_BINARY: res= new Item_func_binary(a); break;
case ITEM_CAST_CHAR: res= new Item_char_typecast(a); break; case ITEM_CAST_CHAR:
res= (cs == NULL) ? new Item_char_typecast(a) :
new Item_func_conv_charset(a,cs);
break;
case ITEM_CAST_SIGNED_INT: res= new Item_func_signed(a); break; case ITEM_CAST_SIGNED_INT: res= new Item_func_signed(a); break;
case ITEM_CAST_UNSIGNED_INT: res= new Item_func_unsigned(a); break; case ITEM_CAST_UNSIGNED_INT: res= new Item_func_unsigned(a); break;
case ITEM_CAST_DATE: res= new Item_date_typecast(a); break; case ITEM_CAST_DATE: res= new Item_date_typecast(a); break;

2
sql/item_create.h
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@@ -28,7 +28,7 @@ Item *create_func_bit_length(Item* a);
Item *create_func_coercibility(Item* a); Item *create_func_coercibility(Item* a);
Item *create_func_ceiling(Item* a); Item *create_func_ceiling(Item* a);
Item *create_func_char_length(Item* a); Item *create_func_char_length(Item* a);
Item *create_func_cast(Item *a, Item_cast cast_type); Item *create_func_cast(Item *a, Item_cast cast_type, CHARSET_INFO *cs);
Item *create_func_connection_id(void); Item *create_func_connection_id(void);
Item *create_func_conv(Item* a, Item *b, Item *c); Item *create_func_conv(Item* a, Item *b, Item *c);
Item *create_func_cos(Item* a); Item *create_func_cos(Item* a);

24
sql/sql_yacc.yy
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@@ -2233,10 +2233,12 @@ simple_expr:
$$= new Item_func_set_collation($2,new Item_string(binary_keyword, $$= new Item_func_set_collation($2,new Item_string(binary_keyword,
6, &my_charset_latin1)); 6, &my_charset_latin1));
} }
| CAST_SYM '(' expr AS cast_type ')' { $$= create_func_cast($3, $5); } | CAST_SYM '(' expr AS cast_type ')'
{ $$= create_func_cast($3, $5, Lex->charset); }
| CASE_SYM opt_expr WHEN_SYM when_list opt_else END | CASE_SYM opt_expr WHEN_SYM when_list opt_else END
{ $$= new Item_func_case(* $4, $2, $5 ); } { $$= new Item_func_case(* $4, $2, $5 ); }
| CONVERT_SYM '(' expr ',' cast_type ')' { $$= create_func_cast($3, $5); } | CONVERT_SYM '(' expr ',' cast_type ')'
{ $$= create_func_cast($3, $5, Lex->charset); }
| CONVERT_SYM '(' expr USING charset_name ')' | CONVERT_SYM '(' expr USING charset_name ')'
{ $$= new Item_func_conv_charset($3,$5); } { $$= new Item_func_conv_charset($3,$5); }
| CONVERT_SYM '(' expr ',' expr ',' expr ')' | CONVERT_SYM '(' expr ',' expr ',' expr ')'
@@ -2645,15 +2647,15 @@ in_sum_expr:
}; };
cast_type: cast_type:
BINARY { $$=ITEM_CAST_BINARY; } BINARY { $$=ITEM_CAST_BINARY; Lex->charset= NULL; }
| CHAR_SYM { $$=ITEM_CAST_CHAR; } | CHAR_SYM opt_binary { $$=ITEM_CAST_CHAR; }
| SIGNED_SYM { $$=ITEM_CAST_SIGNED_INT; } | SIGNED_SYM { $$=ITEM_CAST_SIGNED_INT; Lex->charset= NULL; }
| SIGNED_SYM INT_SYM { $$=ITEM_CAST_SIGNED_INT; } | SIGNED_SYM INT_SYM { $$=ITEM_CAST_SIGNED_INT; Lex->charset= NULL; }
| UNSIGNED { $$=ITEM_CAST_UNSIGNED_INT; } | UNSIGNED { $$=ITEM_CAST_UNSIGNED_INT; Lex->charset= NULL; }
| UNSIGNED INT_SYM { $$=ITEM_CAST_UNSIGNED_INT; } | UNSIGNED INT_SYM { $$=ITEM_CAST_UNSIGNED_INT; Lex->charset= NULL; }
| DATE_SYM { $$=ITEM_CAST_DATE; } | DATE_SYM { $$=ITEM_CAST_DATE; Lex->charset= NULL; }
| TIME_SYM { $$=ITEM_CAST_TIME; } | TIME_SYM { $$=ITEM_CAST_TIME; Lex->charset= NULL; }
| DATETIME { $$=ITEM_CAST_DATETIME; } | DATETIME { $$=ITEM_CAST_DATETIME; Lex->charset= NULL; }
; ;
expr_list: expr_list: