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MDEV-9811 LOAD DATA INFILE does not work well with gbk in some cases

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MDEV-9824 LOAD DATA does not work with multi-byte strings in LINES TERMINATED BY when IGNORE is specified
This commit is contained in:
Alexander Barkov
2016-03-31 14:22:25 +04:00
parent 1d73005bf3
commit 3fc6a8b832
9 changed files with 167 additions and 23 deletions
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97
sql/sql_load.cc
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@ -79,6 +79,14 @@ class READ_INFO {
NET *io_net;
int level; /* for load xml */
bool getbyte(char *to)
{
int chr= GET;
if (chr == my_b_EOF)
return (eof= true);
*to= chr;
return false;
}
public:
bool error,line_cuted,found_null,enclosed;
uchar *row_start, /* Found row starts here */
@ -1706,33 +1714,76 @@ int READ_INFO::next_line()
return 0; // No lines
for (;;)
{
int chr = GET;
#ifdef USE_MB
if (my_mbcharlen(read_charset, chr) > 1)
{
for (uint i=1;
chr != my_b_EOF && i<my_mbcharlen(read_charset, chr);
i++)
chr = GET;
if (chr == escape_char)
continue;
}
#endif
if (chr == my_b_EOF)
{
eof=1;
return 1;
}
if (chr == escape_char)
int chlen;
char buf[MY_CS_MBMAXLEN];
if (getbyte(&buf[0]))
return 1; // EOF
if (use_mb(read_charset) &&
(chlen= my_charlen(read_charset, buf, buf + 1)) != 1)
{
line_cuted=1;
if (GET == my_b_EOF)
return 1;
uint i;
for (i= 1; MY_CS_IS_TOOSMALL(chlen); )
{
DBUG_ASSERT(i < sizeof(buf));
DBUG_ASSERT(chlen != 1);
if (getbyte(&buf[i++]))
return 1; // EOF
chlen= my_charlen(read_charset, buf, buf + i);
}
/*
Either a complete multi-byte sequence,
or a broken byte sequence was found.
Check if the sequence is a prefix of the "LINES TERMINATED BY" string.
*/
if ((uchar) buf[0] == line_term_char && i <= line_term_length &&
!memcmp(buf, line_term_ptr, i))
{
if (line_term_length == i)
{
/*
We found a "LINES TERMINATED BY" string that consists
of a single multi-byte character.
*/
return 0;
}
/*
buf[] is a prefix of "LINES TERMINATED BY".
Now check the suffix. Length of the suffix of line_term_ptr
that still needs to be checked is (line_term_length - i).
Note, READ_INFO::terminator() assumes that the leftmost byte of the
argument is already scanned from the file and is checked to
be a known prefix (e.g. against line_term_char).
So we need to pass one extra byte.
*/
if (terminator(line_term_ptr + i - 1, line_term_length - i + 1))
return 0;
}
/*
Here we have a good multi-byte sequence or a broken byte sequence,
and the sequence is not equal to "LINES TERMINATED BY".
No needs to check for escape_char, because:
- multi-byte escape characters in "FIELDS ESCAPED BY" are not
supported and are rejected at parse time.
- broken single-byte sequences are not recognized as escapes,
they are considered to be a part of the data and are converted to
question marks.
*/
line_cuted= true;
continue;
}
if (chr == line_term_char && terminator(line_term_ptr,line_term_length))
if (buf[0] == escape_char)
{
line_cuted= true;
if (GET == my_b_EOF)
return 1;
continue;
}
if (buf[0] == line_term_char && terminator(line_term_ptr,line_term_length))
return 0;
line_cuted=1;
line_cuted= true;
}
}