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MDEV-7231 Field ROUTINE_DEFINITION in INFORMATION_SCHEMA.ROUTINES

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contains broken procedure body when used shielding quotes inside.
This commit is contained in:
Alexander Barkov 2016-02-24 13:12:03 +04:00
parent 28a36f617f
commit ff2d92b17d
8 changed files with 516 additions and 45 deletions
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13
include/m_ctype.h
View file

@ -533,6 +533,7 @@ struct my_charset_handler_st
extern MY_CHARSET_HANDLER my_charset_8bit_handler;
extern MY_CHARSET_HANDLER my_charset_ucs2_handler;
extern MY_CHARSET_HANDLER my_charset_utf8_handler;
/*
@ -889,6 +890,18 @@ uint32 my_convert(char *to, uint32 to_length, CHARSET_INFO *to_cs,
const char *from, uint32 from_length,
CHARSET_INFO *from_cs, uint *errors);
/**
An extended version of my_convert(), to pass non-default mb_wc() and wc_mb().
For example, String::copy_printable() which is used in
Protocol::store_warning() uses this to escape control
and non-convertable characters.
*/
uint32 my_convert_using_func(char *to, uint32 to_length, CHARSET_INFO *to_cs,
my_charset_conv_wc_mb mb_wc,
const char *from, uint32 from_length,
CHARSET_INFO *from_cs,
my_charset_conv_mb_wc wc_mb,
uint *errors);
/*
Convert a string between two character sets.
Bad byte sequences as well as characters that cannot be

141
mysql-test/r/ctype_utf8.result
View file

@ -10259,5 +10259,146 @@ Warnings:
Note 1003 select `test`.`t1`.`c` AS `c` from `test`.`t1` where (`test`.`t1`.`c` = 'A')
DROP TABLE t1;
#
# MDEV-7231 Field ROUTINE_DEFINITION in INFORMATION_SCHEMA.`ROUTINES` contains broken procedure body when used shielding quotes inside.
#
CREATE PROCEDURE p1()
BEGIN
SELECT CONCAT('ABC = ''',1,''''), CONCAT('ABC = ',2);
SELECT '''', """", '\'', "\"";
SELECT '<tab> <tab>\t<tab>';
SELECT '<nl>
<nl>\n<nl>';
SELECT 'test';
SELECT 'tëst';
SELECT 'test\0';
SELECT 'tëst\0';
SELECT _binary'test';
SELECT _binary'test\0';
SELECT N'''', N"""", N'\'', N"\"";
SELECT N'<tab> <tab>\t<tab>';
SELECT N'<nl>
<nl>\n<nl>';
SELECT N'test';
SELECT N'tëst';
SELECT N'test\0';
SELECT N'tëst\0';
END$$
SELECT ROUTINE_DEFINITION FROM INFORMATION_SCHEMA.ROUTINES
WHERE ROUTINE_SCHEMA='test' AND SPECIFIC_NAME ='p1';
ROUTINE_DEFINITION
BEGIN
SELECT CONCAT('ABC = ''',1,''''), CONCAT('ABC = ',2);
SELECT '''', """", '''', """";
SELECT '<tab>\t<tab>\t<tab>';
SELECT '<nl>\n<nl>\n<nl>';
SELECT 'test';
SELECT 'tëst';
SELECT 'test\0';
SELECT 'tëst\0';
SELECT 'test';
SELECT 'test\0';
SELECT N'''', N"""", N'''', N"""";
SELECT N'<tab>\t<tab>\t<tab>';
SELECT N'<nl>\n<nl>\n<nl>';
SELECT N'test';
SELECT N'tëst';
SELECT N'test\0';
SELECT N'tëst\0';
END
SELECT body_utf8 FROM mysql.proc WHERE name='p1';
body_utf8
BEGIN
SELECT CONCAT('ABC = ''',1,''''), CONCAT('ABC = ',2);
SELECT '''', """", '''', """";
SELECT '<tab>\t<tab>\t<tab>';
SELECT '<nl>\n<nl>\n<nl>';
SELECT 'test';
SELECT 'tëst';
SELECT 'test\0';
SELECT 'tëst\0';
SELECT 'test';
SELECT 'test\0';
SELECT N'''', N"""", N'''', N"""";
SELECT N'<tab>\t<tab>\t<tab>';
SELECT N'<nl>\n<nl>\n<nl>';
SELECT N'test';
SELECT N'tëst';
SELECT N'test\0';
SELECT N'tëst\0';
END
DROP PROCEDURE p1;
SET @@SQL_MODE='NO_BACKSLASH_ESCAPES';
CREATE PROCEDURE p1()
BEGIN
SELECT CONCAT('ABC = ''',1,''''), CONCAT('ABC = ',2);
SELECT '''', """";
SELECT '<tab> <tab>\t<tab>';
SELECT '<nl>
<nl>\n<nl>';
SELECT 'test';
SELECT 'tëst';
SELECT 'test\0';
SELECT 'tëst\0';
SELECT _binary'test';
SELECT _binary'test\0';
SELECT N'''', N"""";
SELECT N'<tab> <tab>\t<tab>';
SELECT N'<nl>
<nl>\n<nl>';
SELECT N'test';
SELECT N'tëst';
SELECT N'test\0';
SELECT N'tëst\0';
END$$
SELECT ROUTINE_DEFINITION FROM INFORMATION_SCHEMA.ROUTINES
WHERE ROUTINE_SCHEMA='test' AND SPECIFIC_NAME ='p1';
ROUTINE_DEFINITION
BEGIN
SELECT CONCAT('ABC = ''',1,''''), CONCAT('ABC = ',2);
SELECT '''', """";
SELECT '<tab> <tab>\t<tab>';
SELECT '<nl>
<nl>\n<nl>';
SELECT 'test';
SELECT 'tëst';
SELECT 'test\0';
SELECT 'tëst\0';
SELECT 'test';
SELECT 'test\0';
SELECT N'''', N"""";
SELECT N'<tab> <tab>\t<tab>';
SELECT N'<nl>
<nl>\n<nl>';
SELECT N'test';
SELECT N'tëst';
SELECT N'test\0';
SELECT N'tëst\0';
END
SELECT body_utf8 FROM mysql.proc WHERE name='p1';
body_utf8
BEGIN
SELECT CONCAT('ABC = ''',1,''''), CONCAT('ABC = ',2);
SELECT '''', """";
SELECT '<tab> <tab>\t<tab>';
SELECT '<nl>
<nl>\n<nl>';
SELECT 'test';
SELECT 'tëst';
SELECT 'test\0';
SELECT 'tëst\0';
SELECT 'test';
SELECT 'test\0';
SELECT N'''', N"""";
SELECT N'<tab> <tab>\t<tab>';
SELECT N'<nl>
<nl>\n<nl>';
SELECT N'test';
SELECT N'tëst';
SELECT N'test\0';
SELECT N'tëst\0';
END
DROP PROCEDURE p1;
SET @@SQL_MODE=default;
#
# End of 10.1 tests
#

14
mysql-test/r/ctype_utf8mb4.result
View file

@ -3382,5 +3382,19 @@ SET NAMES utf8mb4;
SELECT * FROM `test😁😁test`;
ERROR HY000: Invalid utf8mb4 character string: 'test\xF0\x9F\x98\x81\xF0\x9F\x98\x81test'
#
# MDEV-7231 Field ROUTINE_DEFINITION in INFORMATION_SCHEMA.`ROUTINES` contains broken procedure body when used shielding quotes inside.
#
SET NAMES utf8mb4;
CREATE FUNCTION f1() RETURNS TEXT CHARACTER SET utf8mb4
RETURN CONCAT('😎','x😎','😎y','x😎y');
SELECT ROUTINE_DEFINITION FROM INFORMATION_SCHEMA.ROUTINES
WHERE ROUTINE_SCHEMA='test' AND SPECIFIC_NAME ='f1';
ROUTINE_DEFINITION
RETURN CONCAT('?','x?','?y','x?y')
SELECT body_utf8 FROM mysql.proc WHERE name='f1';
body_utf8
RETURN CONCAT('?','x?','?y','x?y')
DROP FUNCTION f1;
#
# End of 10.1 tests
#

76
mysql-test/t/ctype_utf8.test
View file

@ -1871,6 +1871,82 @@ SELECT * FROM t1 WHERE c>=_utf8'a' COLLATE utf8_general_ci AND c='A';
DROP TABLE t1;
--echo #
--echo # MDEV-7231 Field ROUTINE_DEFINITION in INFORMATION_SCHEMA.`ROUTINES` contains broken procedure body when used shielding quotes inside.
--echo #
DELIMITER $$;
CREATE PROCEDURE p1()
BEGIN
SELECT CONCAT('ABC = ''',1,''''), CONCAT('ABC = ',2);
SELECT '''', """", '\'', "\"";
SELECT '<tab> <tab>\t<tab>';
SELECT '<nl>
<nl>\n<nl>';
SELECT 'test';
SELECT 'tëst';
SELECT 'test\0';
SELECT 'tëst\0';
SELECT _binary'test';
SELECT _binary'test\0';
SELECT N'''', N"""", N'\'', N"\"";
SELECT N'<tab> <tab>\t<tab>';
SELECT N'<nl>
<nl>\n<nl>';
SELECT N'test';
SELECT N'tëst';
SELECT N'test\0';
SELECT N'tëst\0';
END$$
DELIMITER ;$$
SELECT ROUTINE_DEFINITION FROM INFORMATION_SCHEMA.ROUTINES
WHERE ROUTINE_SCHEMA='test' AND SPECIFIC_NAME ='p1';
SELECT body_utf8 FROM mysql.proc WHERE name='p1';
DROP PROCEDURE p1;
SET @@SQL_MODE='NO_BACKSLASH_ESCAPES';
DELIMITER $$;
CREATE PROCEDURE p1()
BEGIN
SELECT CONCAT('ABC = ''',1,''''), CONCAT('ABC = ',2);
SELECT '''', """";
SELECT '<tab> <tab>\t<tab>';
SELECT '<nl>
<nl>\n<nl>';
SELECT 'test';
SELECT 'tëst';
SELECT 'test\0';
SELECT 'tëst\0';
SELECT _binary'test';
SELECT _binary'test\0';
SELECT N'''', N"""";
SELECT N'<tab> <tab>\t<tab>';
SELECT N'<nl>
<nl>\n<nl>';
SELECT N'test';
SELECT N'tëst';
SELECT N'test\0';
SELECT N'tëst\0';
END$$
DELIMITER ;$$
SELECT ROUTINE_DEFINITION FROM INFORMATION_SCHEMA.ROUTINES
WHERE ROUTINE_SCHEMA='test' AND SPECIFIC_NAME ='p1';
SELECT body_utf8 FROM mysql.proc WHERE name='p1';
DROP PROCEDURE p1;
SET @@SQL_MODE=default;
# TODO: Uncomment the below test whe we fix:
# MDEV-9623INFORMATION_SCHEMA.ROUTINES.ROUTINE_DEFINITION does not handle binary literals well
#
#SET NAMES binary;
#CREATE FUNCTION f1() RETURNS TEXT RETURN CONCAT('i','й');
#SELECT ROUTINE_DEFINITION FROM INFORMATION_SCHEMA.ROUTINES
#WHERE ROUTINE_SCHEMA='test' AND SPECIFIC_NAME ='f1';
#SELECT body_utf8 FROM mysql.proc WHERE name='f1';
#DROP FUNCTION f1;
#SET NAMES utf8;
--echo #
--echo # End of 10.1 tests
--echo #

12
mysql-test/t/ctype_utf8mb4.test
View file

@ -1904,6 +1904,18 @@ SET NAMES utf8mb4;
--error ER_INVALID_CHARACTER_STRING
SELECT * FROM `test😁😁test`;
--echo #
--echo # MDEV-7231 Field ROUTINE_DEFINITION in INFORMATION_SCHEMA.`ROUTINES` contains broken procedure body when used shielding quotes inside.
--echo #
# Non-BMP characters should be replaced to '?' in ROUTINE_DEFINITION/body_utf8
SET NAMES utf8mb4;
CREATE FUNCTION f1() RETURNS TEXT CHARACTER SET utf8mb4
RETURN CONCAT('😎','x😎','😎y','x😎y');
SELECT ROUTINE_DEFINITION FROM INFORMATION_SCHEMA.ROUTINES
WHERE ROUTINE_SCHEMA='test' AND SPECIFIC_NAME ='f1';
SELECT body_utf8 FROM mysql.proc WHERE name='f1';
DROP FUNCTION f1;
--echo #
--echo # End of 10.1 tests
--echo #

255
sql/sql_lex.cc
View file

@ -324,9 +324,7 @@ void Lex_input_stream::body_utf8_start(THD *thd, const char *begin_ptr)
DBUG_ASSERT(begin_ptr);
DBUG_ASSERT(m_cpp_buf <= begin_ptr && begin_ptr <= m_cpp_buf + m_buf_length);
uint body_utf8_length=
(m_buf_length / thd->variables.character_set_client->mbminlen) *
my_charset_utf8_bin.mbmaxlen;
uint body_utf8_length= get_body_utf8_maximum_length(thd);
m_body_utf8= (char *) thd->alloc(body_utf8_length + 1);
m_body_utf8_ptr= m_body_utf8;
@ -335,6 +333,22 @@ void Lex_input_stream::body_utf8_start(THD *thd, const char *begin_ptr)
m_cpp_utf8_processed_ptr= begin_ptr;
}
uint Lex_input_stream::get_body_utf8_maximum_length(THD *thd)
{
/*
String literals can grow during escaping:
1a. Character string '<TAB>' can grow to '\t', 3 bytes to 4 bytes growth.
1b. Character string '1000 times <TAB>' grows from
1002 to 2002 bytes (including quotes), which gives a little bit
less than 2 times growth.
"2" should be a reasonable multiplier that safely covers escaping needs.
*/
return (m_buf_length / thd->variables.character_set_client->mbminlen) *
my_charset_utf8_bin.mbmaxlen * 2/*for escaping*/;
}
/**
@brief The operation appends unprocessed part of pre-processed buffer till
the given pointer (ptr) and sets m_cpp_utf8_processed_ptr to end_ptr.
@ -402,15 +416,15 @@ void Lex_input_stream::body_utf8_append(const char *ptr)
operation.
*/
void Lex_input_stream::body_utf8_append_literal(THD *thd,
const LEX_STRING *txt,
CHARSET_INFO *txt_cs,
const char *end_ptr)
void Lex_input_stream::body_utf8_append_ident(THD *thd,
const LEX_STRING *txt,
const char *end_ptr)
{
if (!m_cpp_utf8_processed_ptr)
return;
LEX_STRING utf_txt;
CHARSET_INFO *txt_cs= thd->charset();
if (!my_charset_same(txt_cs, &my_charset_utf8_general_ci))
{
@ -434,6 +448,189 @@ void Lex_input_stream::body_utf8_append_literal(THD *thd,
m_cpp_utf8_processed_ptr= end_ptr;
}
extern "C" {
/**
Escape a character. Consequently puts "escape" and "wc" characters into
the destination utf8 string.
@param cs - the character set (utf8)
@param escape - the escape character (backslash, single quote, double quote)
@param wc - the character to be escaped
@param str - the destination string
@param end - the end of the destination string
@returns - a code according to the wc_mb() convension.
*/
int my_wc_mb_utf8_with_escape(CHARSET_INFO *cs, my_wc_t escape, my_wc_t wc,
uchar *str, uchar *end)
{
DBUG_ASSERT(escape > 0);
if (str + 1 >= end)
return MY_CS_TOOSMALL2; // Not enough space, need at least two bytes.
*str= escape;
int cnvres= my_charset_utf8_handler.wc_mb(cs, wc, str + 1, end);
if (cnvres > 0)
return cnvres + 1; // The character was normally put
if (cnvres == MY_CS_ILUNI)
return MY_CS_ILUNI; // Could not encode "wc" (e.g. non-BMP character)
DBUG_ASSERT(cnvres <= MY_CS_TOOSMALL);
return cnvres - 1; // Not enough space
}
/**
Optionally escape a character.
If "escape" is non-zero, then both "escape" and "wc" are put to
the destination string. Otherwise, only "wc" is put.
@param cs - the character set (utf8)
@param wc - the character to be optionally escaped
@param escape - the escape character, or 0
@param ewc - the escaped replacement of "wc" (e.g. 't' for '\t')
@param str - the destination string
@param end - the end of the destination string
@returns - a code according to the wc_mb() conversion.
*/
int my_wc_mb_utf8_opt_escape(CHARSET_INFO *cs,
my_wc_t wc, my_wc_t escape, my_wc_t ewc,
uchar *str, uchar *end)
{
return escape ? my_wc_mb_utf8_with_escape(cs, escape, ewc, str, end) :
my_charset_utf8_handler.wc_mb(cs, wc, str, end);
}
/**
Encode a character with optional backlash escaping and quote escaping.
Quote marks are escaped using another quote mark.
Additionally, if "escape" is non-zero, then special characters are
also escaped using "escape".
Otherwise (if "escape" is zero, e.g. in case of MODE_NO_BACKSLASH_ESCAPES),
then special characters are not escaped and handled as normal characters.
@param cs - the character set (utf8)
@param wc - the character to be encoded
@param str - the destination string
@param end - the end of the destination string
@param sep - the string delimiter (e.g. ' or ")
@param escape - the escape character (backslash, or 0)
@returns - a code according to the wc_mb() convension.
*/
int my_wc_mb_utf8_escape(CHARSET_INFO *cs, my_wc_t wc, uchar *str, uchar *end,
my_wc_t sep, my_wc_t escape)
{
DBUG_ASSERT(escape == 0 || escape == '\\');
DBUG_ASSERT(sep == '"' || sep == '\'');
switch (wc) {
case 0: return my_wc_mb_utf8_opt_escape(cs, wc, escape, '0', str, end);
case '\t': return my_wc_mb_utf8_opt_escape(cs, wc, escape, 't', str, end);
case '\r': return my_wc_mb_utf8_opt_escape(cs, wc, escape, 'r', str, end);
case '\n': return my_wc_mb_utf8_opt_escape(cs, wc, escape, 'n', str, end);
case '\032': return my_wc_mb_utf8_opt_escape(cs, wc, escape, 'Z', str, end);
case '\'':
case '\"':
if (wc == sep)
return my_wc_mb_utf8_with_escape(cs, wc, wc, str, end);
}
return my_charset_utf8_handler.wc_mb(cs, wc, str, end); // No escaping needed
}
/** wc_mb() compatible routines for all sql_mode and delimiter combinations */
int my_wc_mb_utf8_escape_single_quote_and_backslash(CHARSET_INFO *cs,
my_wc_t wc,
uchar *str, uchar *end)
{
return my_wc_mb_utf8_escape(cs, wc, str, end, '\'', '\\');
}
int my_wc_mb_utf8_escape_double_quote_and_backslash(CHARSET_INFO *cs,
my_wc_t wc,
uchar *str, uchar *end)
{
return my_wc_mb_utf8_escape(cs, wc, str, end, '"', '\\');
}
int my_wc_mb_utf8_escape_single_quote(CHARSET_INFO *cs, my_wc_t wc,
uchar *str, uchar *end)
{
return my_wc_mb_utf8_escape(cs, wc, str, end, '\'', 0);
}
int my_wc_mb_utf8_escape_double_quote(CHARSET_INFO *cs, my_wc_t wc,
uchar *str, uchar *end)
{
return my_wc_mb_utf8_escape(cs, wc, str, end, '"', 0);
}
}; // End of extern "C"
/**
Get an escaping function, depending on the current sql_mode and the
string separator.
*/
my_charset_conv_wc_mb
Lex_input_stream::get_escape_func(THD *thd, my_wc_t sep) const
{
return thd->backslash_escapes() ?
(sep == '"' ? my_wc_mb_utf8_escape_double_quote_and_backslash:
my_wc_mb_utf8_escape_single_quote_and_backslash) :
(sep == '"' ? my_wc_mb_utf8_escape_double_quote:
my_wc_mb_utf8_escape_single_quote);
}
/**
Append a text literal to the end of m_body_utf8.
The string is escaped according to the current sql_mode and the
string delimiter (e.g. ' or ").
@param thd - current THD
@param txt - the string to be appended to m_body_utf8.
Note, the string must be already unescaped.
@param cs - the character set of the string
@param end_ptr - m_cpp_utf8_processed_ptr will be set to this value
(see body_utf8_append_ident for details)
@param sep - the string delimiter (single or double quote)
*/
void Lex_input_stream::body_utf8_append_escape(THD *thd,
const LEX_STRING *txt,
CHARSET_INFO *cs,
const char *end_ptr,
my_wc_t sep)
{
DBUG_ASSERT(sep == '\'' || sep == '"');
if (!m_cpp_utf8_processed_ptr)
return;
uint errors;
/**
We previously alloced m_body_utf8 to be able to store the query with all
strings properly escaped. See get_body_utf8_maximum_length().
So here we have guaranteedly enough space to append any string literal
with escaping. Passing txt->length*2 as "available space" is always safe.
For better safety purposes we could calculate get_body_utf8_maximum_length()
every time we append a string, but this would affect performance negatively,
so let's check that we don't get beyond the allocated buffer in
debug build only.
*/
DBUG_ASSERT(m_body_utf8 + get_body_utf8_maximum_length(thd) >=
m_body_utf8_ptr + txt->length * 2);
uint32 cnv_length= my_convert_using_func(m_body_utf8_ptr, txt->length * 2,
&my_charset_utf8_general_ci,
get_escape_func(thd, sep),
txt->str, txt->length,
cs, cs->cset->mb_wc,
&errors);
m_body_utf8_ptr+= cnv_length;
*m_body_utf8_ptr= 0;
m_cpp_utf8_processed_ptr= end_ptr;
}
void Lex_input_stream::add_digest_token(uint token, LEX_YYSTYPE yylval)
{
if (m_digest != NULL)
@ -797,14 +994,14 @@ Lex_input_stream::unescape(CHARSET_INFO *cs, char *to,
Fix sometimes to do only one scan of the string
*/
bool Lex_input_stream::get_text(LEX_STRING *dst, int pre_skip, int post_skip)
bool Lex_input_stream::get_text(LEX_STRING *dst, uint sep,
int pre_skip, int post_skip)
{
reg1 uchar c,sep;
reg1 uchar c;
uint found_escape=0;
CHARSET_INFO *cs= m_thd->charset();
tok_bitmap= 0;
sep= yyGetLast(); // String should end with this
while (! eof())
{
c= yyGet();
@ -1169,6 +1366,8 @@ static int lex_one_token(YYSTYPE *yylval, THD *thd)
return((int) c);
case MY_LEX_IDENT_OR_NCHAR:
{
uint sep;
if (lip->yyPeek() != '\'')
{
state= MY_LEX_IDENT;
@ -1176,14 +1375,20 @@ static int lex_one_token(YYSTYPE *yylval, THD *thd)
}
/* Found N'string' */
lip->yySkip(); // Skip '
if (lip->get_text(&yylval->lex_str, 2, 1))
if (lip->get_text(&yylval->lex_str, (sep= lip->yyGetLast()), 2, 1))
{
state= MY_LEX_CHAR; // Read char by char
break;
}
lip->body_utf8_append(lip->m_cpp_text_start);
lip->body_utf8_append_escape(thd, &yylval->lex_str,
national_charset_info,
lip->m_cpp_text_end, sep);
lex->text_string_is_7bit= (lip->tok_bitmap & 0x80) ? 0 : 1;
return(NCHAR_STRING);
}
case MY_LEX_IDENT_OR_HEX:
if (lip->yyPeek() == '\'')
{ // Found x'hex-number'
@ -1286,8 +1491,7 @@ static int lex_one_token(YYSTYPE *yylval, THD *thd)
lip->body_utf8_append(lip->m_cpp_text_start);
lip->body_utf8_append_literal(thd, &yylval->lex_str, cs,
lip->m_cpp_text_end);
lip->body_utf8_append_ident(thd, &yylval->lex_str, lip->m_cpp_text_end);
return(result_state); // IDENT or IDENT_QUOTED
@ -1391,8 +1595,7 @@ static int lex_one_token(YYSTYPE *yylval, THD *thd)
lip->body_utf8_append(lip->m_cpp_text_start);
lip->body_utf8_append_literal(thd, &yylval->lex_str, cs,
lip->m_cpp_text_end);
lip->body_utf8_append_ident(thd, &yylval->lex_str, lip->m_cpp_text_end);
return(result_state);
@ -1435,8 +1638,7 @@ static int lex_one_token(YYSTYPE *yylval, THD *thd)
lip->body_utf8_append(lip->m_cpp_text_start);
lip->body_utf8_append_literal(thd, &yylval->lex_str, cs,
lip->m_cpp_text_end);
lip->body_utf8_append_ident(thd, &yylval->lex_str, lip->m_cpp_text_end);
return(IDENT_QUOTED);
}
@ -1541,23 +1743,23 @@ static int lex_one_token(YYSTYPE *yylval, THD *thd)
}
/* " used for strings */
case MY_LEX_STRING: // Incomplete text string
if (lip->get_text(&yylval->lex_str, 1, 1))
{
uint sep;
if (lip->get_text(&yylval->lex_str, (sep= lip->yyGetLast()), 1, 1))
{
state= MY_LEX_CHAR; // Read char by char
break;
}
CHARSET_INFO *strcs= lip->m_underscore_cs ? lip->m_underscore_cs : cs;
lip->body_utf8_append(lip->m_cpp_text_start);
lip->body_utf8_append_literal(thd, &yylval->lex_str,
lip->m_underscore_cs ? lip->m_underscore_cs : cs,
lip->m_cpp_text_end);
lip->body_utf8_append_escape(thd, &yylval->lex_str, strcs,
lip->m_cpp_text_end, sep);
lip->m_underscore_cs= NULL;
lex->text_string_is_7bit= (lip->tok_bitmap & 0x80) ? 0 : 1;
return(TEXT_STRING);
}
case MY_LEX_COMMENT: // Comment
lex->select_lex.options|= OPTION_FOUND_COMMENT;
while ((c = lip->yyGet()) != '\n' && c) ;
@ -1806,8 +2008,7 @@ static int lex_one_token(YYSTYPE *yylval, THD *thd)
lip->body_utf8_append(lip->m_cpp_text_start);
lip->body_utf8_append_literal(thd, &yylval->lex_str, cs,
lip->m_cpp_text_end);
lip->body_utf8_append_ident(thd, &yylval->lex_str, lip->m_cpp_text_end);
return(result_state);
}

22
sql/sql_lex.h
View file

@ -1807,6 +1807,7 @@ class Lex_input_stream
{
size_t unescape(CHARSET_INFO *cs, char *to,
const char *str, const char *end, int sep);
my_charset_conv_wc_mb get_escape_func(THD *thd, my_wc_t sep) const;
public:
Lex_input_stream()
{
@ -2077,14 +2078,23 @@ public:
return (uint) (m_body_utf8_ptr - m_body_utf8);
}
/**
Get the maximum length of the utf8-body buffer.
The utf8 body can grow because of the character set conversion and escaping.
*/
uint get_body_utf8_maximum_length(THD *thd);
void body_utf8_start(THD *thd, const char *begin_ptr);
void body_utf8_append(const char *ptr);
void body_utf8_append(const char *ptr, const char *end_ptr);
void body_utf8_append_literal(THD *thd,
const LEX_STRING *txt,
CHARSET_INFO *txt_cs,
const char *end_ptr);
void body_utf8_append_ident(THD *thd,
const LEX_STRING *txt,
const char *end_ptr);
void body_utf8_append_escape(THD *thd,
const LEX_STRING *txt,
CHARSET_INFO *txt_cs,
const char *end_ptr,
my_wc_t sep);
/** Current thread. */
THD *m_thd;
@ -2105,7 +2115,7 @@ public:
/** LALR(2) resolution, value of the look ahead token.*/
LEX_YYSTYPE lookahead_yylval;
bool get_text(LEX_STRING *to, int pre_skip, int post_skip);
bool get_text(LEX_STRING *to, uint sep, int pre_skip, int post_skip);
void add_digest_token(uint token, LEX_YYSTYPE yylval);

28
strings/ctype.c
View file

@ -1030,19 +1030,18 @@ my_charset_is_ascii_compatible(CHARSET_INFO *cs)
@return Number of bytes copied to 'to' string
*/
static uint32
my_convert_internal(char *to, uint32 to_length,
CHARSET_INFO *to_cs,
const char *from, uint32 from_length,
CHARSET_INFO *from_cs, uint *errors)
uint32
my_convert_using_func(char *to, uint32 to_length,
CHARSET_INFO *to_cs, my_charset_conv_wc_mb wc_mb,
const char *from, uint32 from_length,
CHARSET_INFO *from_cs, my_charset_conv_mb_wc mb_wc,
uint *errors)
{
int cnvres;
my_wc_t wc;
const uchar *from_end= (const uchar*) from + from_length;
char *to_start= to;
uchar *to_end= (uchar*) to + to_length;
my_charset_conv_mb_wc mb_wc= from_cs->cset->mb_wc;
my_charset_conv_wc_mb wc_mb= to_cs->cset->wc_mb;
uint error_count= 0;
while (1)
@ -1119,8 +1118,11 @@ my_convert(char *to, uint32 to_length, CHARSET_INFO *to_cs,
immediately switch to slow mb_wc->wc_mb method.
*/
if ((to_cs->state | from_cs->state) & MY_CS_NONASCII)
return my_convert_internal(to, to_length, to_cs,
from, from_length, from_cs, errors);
return my_convert_using_func(to, to_length,
to_cs, to_cs->cset->wc_mb,
from, from_length,
from_cs, from_cs->cset->mb_wc,
errors);
length= length2= MY_MIN(to_length, from_length);
@ -1152,9 +1154,11 @@ my_convert(char *to, uint32 to_length, CHARSET_INFO *to_cs,
uint32 copied_length= length2 - length;
to_length-= copied_length;
from_length-= copied_length;
return copied_length + my_convert_internal(to, to_length, to_cs,
from, from_length, from_cs,
errors);
return copied_length + my_convert_using_func(to, to_length, to_cs,
to_cs->cset->wc_mb,
from, from_length, from_cs,
from_cs->cset->mb_wc,
errors);
}
}