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Fix for:

Browse Source 
bug #26215: mysql command line client should not strip comments
              from SQL statements
and
  bug #11230: Keeping comments when storing stored procedures

With the introduction of multiline comments support in the command line
client (mysql) in MySQL 4.1, it became impossible to preserve
client-side comments within single SQL statements or stored routines.
This feature was useful for monitoring tools and maintenance.

The patch adds a new option to the command line client
('--enable-comments', '-c') which allows to preserve SQL comments and
send them to the server for single SQL statements, and to keep comments
in the code for stored procedures / functions / triggers.

The patch is a modification of the contributed patch from bug #11230
with the following changes:
- code style changes to conform to the coding guidelines
- changed is_prefix() to my_strnncoll() to detect the DELIMITER
command, since the first one is case-sensitive and not charset-aware
- renamed t/comments-51.* to t/mysql_comments.*
- removed tests for comments in triggers since 5.0 does not have SHOW
CREATE TRIGGER (those tests will be added back in 5.1).

The test cases are only for bug #11230. No automated test case for bug
#26215 is possible due to the test suite deficiencies (though the cases
from the bug report were tested manually).
This commit is contained in:
kaa@polly.(none)
2007-11-02 13:40:34 +03:00
parent 349841118f
commit 9cd5f49c53
4 changed files with 389 additions and 43 deletions
Download Patch File Download Diff File Expand all files Collapse all files

168
client/mysql.cc
View File

@ -140,6 +140,7 @@ static my_bool info_flag=0,ignore_errors=0,wait_flag=0,quick=0,
default_pager_set= 0, opt_sigint_ignore= 0,
show_warnings= 0;
static volatile int executing_query= 0, interrupted_query= 0;
static my_bool preserve_comments= 0;
static ulong opt_max_allowed_packet, opt_net_buffer_length;
static uint verbose=0,opt_silent=0,opt_mysql_port=0, opt_local_infile=0;
static my_string opt_mysql_unix_port=0;
@ -754,6 +755,10 @@ static struct my_option my_long_options[] =
{"show-warnings", OPT_SHOW_WARNINGS, "Show warnings after every statement.",
(gptr*) &show_warnings, (gptr*) &show_warnings, 0, GET_BOOL, NO_ARG,
0, 0, 0, 0, 0, 0},
{"comments", 'c', "Preserve comments. Send comments to the server."
" Comments are discarded by default, enable with --enable-comments",
(gptr*) &preserve_comments, (gptr*) &preserve_comments,
0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
{ 0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}
};
@ -1131,10 +1136,6 @@ static int read_and_execute(bool interactive)
status.exit_status=0;
break;
}
if (!in_string && (line[0] == '#' ||
(line[0] == '-' && line[1] == '-') ||
line[0] == 0))
continue; // Skip comment lines
/*
Check if line is a mysql command line
@ -1260,15 +1261,21 @@ static bool add_line(String &buffer,char *line,char *in_string,
for (pos=out=line ; (inchar= (uchar) *pos) ; pos++)
{
if (my_isspace(charset_info,inchar) && out == line &&
buffer.is_empty())
continue;
if (!preserve_comments)
{
// Skip spaces at the beggining of a statement
if (my_isspace(charset_info,inchar) && (out == line) &&
buffer.is_empty())
continue;
}
#ifdef USE_MB
// Accept multi-byte characters as-is
int length;
if (use_mb(charset_info) &&
(length= my_ismbchar(charset_info, pos, end_of_line)))
{
if (!*ml_comment)
if (!*ml_comment || preserve_comments)
{
while (length--)
*out++ = *pos++;
@ -1294,8 +1301,13 @@ static bool add_line(String &buffer,char *line,char *in_string,
}
if ((com=find_command(NullS,(char) inchar)))
{
const String tmp(line,(uint) (out-line), charset_info);
buffer.append(tmp);
// Flush previously accepted characters
if (out != line)
{
buffer.append(line, (uint) (out-line));
out= line;
}
if ((*com->func)(&buffer,pos-1) > 0)
DBUG_RETURN(1); // Quit
if (com->takes_params)
@ -1323,7 +1335,6 @@ static bool add_line(String &buffer,char *line,char *in_string,
pos+= delimiter_length - 1; // Point at last delim char
}
}
out=line;
}
else
{
@ -1336,46 +1347,106 @@ static bool add_line(String &buffer,char *line,char *in_string,
}
}
else if (!*ml_comment && !*in_string &&
(*pos == *delimiter && is_prefix(pos + 1, delimiter + 1) ||
buffer.length() == 0 && (out - line) >= 9 &&
!my_strcasecmp(charset_info, line, "delimiter")))
{
uint old_delimiter_length= delimiter_length;
(out - line) >= 9 &&
!my_strnncoll(charset_info, (uchar*) pos, 9,
(const uchar*) "delimiter", 9) &&
my_isspace(charset_info, pos[9]))
{
// Flush previously accepted characters
if (out != line)
buffer.append(line, (uint) (out - line)); // Add this line
{
buffer.append(line, (uint32) (out - line));
out= line;
}
// Flush possible comments in the buffer
if (!buffer.is_empty())
{
if (com_go(&buffer, 0) > 0) // < 0 is not fatal
DBUG_RETURN(1);
buffer.length(0);
}
/*
Delimiter wants the get rest of the given line as argument to
allow one to change ';' to ';;' and back
*/
buffer.append(pos);
if (com_delimiter(&buffer, pos) > 0)
DBUG_RETURN(1);
buffer.length(0);
break;
}
else if (!*ml_comment && !*in_string && is_prefix(pos, delimiter))
{
// Found a statement. Continue parsing after the delimiter
pos+= delimiter_length;
if (preserve_comments)
{
while (my_isspace(charset_info, *pos))
*out++= *pos++;
}
// Flush previously accepted characters
if (out != line)
{
buffer.append(line, (uint32) (out-line));
out= line;
}
if (preserve_comments && ((*pos == '#') ||
((*pos == '-') &&
(pos[1] == '-') &&
my_isspace(charset_info, pos[2]))))
{
// Add trailing single line comments to this statement
buffer.append(pos);
pos+= strlen(pos);
}
pos--;
if ((com= find_command(buffer.c_ptr(), 0)))
{
if (com->func == com_delimiter)
{
/*
Delimiter wants the get rest of the given line as argument to
allow one to change ';' to ';;' and back
*/
char *end= strend(pos);
buffer.append(pos, (uint) (end - pos));
/* Ensure pos will point at \0 after the pos+= below */
pos= end - old_delimiter_length + 1;
}
if ((*com->func)(&buffer, buffer.c_ptr()) > 0)
DBUG_RETURN(1); // Quit
if ((*com->func)(&buffer, buffer.c_ptr()) > 0)
DBUG_RETURN(1); // Quit
}
else
{
if (com_go(&buffer, 0) > 0) // < 0 is not fatal
DBUG_RETURN(1);
if (com_go(&buffer, 0) > 0) // < 0 is not fatal
DBUG_RETURN(1);
}
buffer.length(0);
out= line;
pos+= old_delimiter_length - 1;
}
else if (!*ml_comment && (!*in_string && (inchar == '#' ||
inchar == '-' && pos[1] == '-' &&
my_isspace(charset_info,pos[2]))))
break; // comment to end of line
{
// Flush previously accepted characters
if (out != line)
{
buffer.append(line, (uint32) (out - line));
out= line;
}
// comment to end of line
if (preserve_comments)
buffer.append(pos);
break;
}
else if (!*in_string && inchar == '/' && *(pos+1) == '*' &&
*(pos+2) != '!')
{
pos++;
if (preserve_comments)
{
*out++= *pos++; // copy '/'
*out++= *pos; // copy '*'
}
else
pos++;
*ml_comment= 1;
if (out != line)
{
@ -1385,8 +1456,21 @@ static bool add_line(String &buffer,char *line,char *in_string,
}
else if (*ml_comment && !ss_comment && inchar == '*' && *(pos + 1) == '/')
{
pos++;
if (preserve_comments)
{
*out++= *pos++; // copy '*'
*out++= *pos; // copy '/'
}
else
pos++;
*ml_comment= 0;
if (out != line)
{
buffer.append(line, (uint32) (out - line));
out= line;
}
// Consumed a 2 chars or more, and will add 1 at most,
// so using the 'line' buffer to edit data in place is ok.
need_space= 1;
}
else
@ -1401,14 +1485,12 @@ static bool add_line(String &buffer,char *line,char *in_string,
else if (!*ml_comment && !*in_string &&
(inchar == '\'' || inchar == '"' || inchar == '`'))
*in_string= (char) inchar;
if (!*ml_comment)
if (!*ml_comment || preserve_comments)
{
if (need_space && !my_isspace(charset_info, (char)inchar))
{
*out++= ' ';
need_space= 0;
}
*out++= (char) inchar;
need_space= 0;
*out++= (char) inchar;
}
}
}
@ -1418,7 +1500,7 @@ static bool add_line(String &buffer,char *line,char *in_string,
uint length=(uint) (out-line);
if (buffer.length() + length >= buffer.alloced_length())
buffer.realloc(buffer.length()+length+IO_SIZE);
if (!(*ml_comment) && buffer.append(line,length))
if ((!*ml_comment || preserve_comments) && buffer.append(line, length))
DBUG_RETURN(1);
}
DBUG_RETURN(0);