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In the command-line client, try to abort the current query by issuing a

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KILL command on a second connection when handling Ctrl-C. (WL#2852) 

Based on patch by Harrison Fisk.


client/mysql.cc:
  When a query is executing, handle Ctrl-C by trying to make a second
  connection to the server and issuing a KILL command against the
  original connection.
This commit is contained in:
unknown
2005-10-05 12:54:04 -07:00
parent 4a231e408c
commit 7cfa7c94bf
1 changed files with 53 additions and 6 deletions
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59
client/mysql.cc
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@ -135,7 +135,8 @@ static my_bool info_flag=0,ignore_errors=0,wait_flag=0,quick=0,
opt_xml=0,opt_nopager=1, opt_outfile=0, named_cmds= 0,
tty_password= 0, opt_nobeep=0, opt_reconnect=1,
default_charset_used= 0, opt_secure_auth= 0,
default_pager_set= 0, opt_sigint_ignore= 0;
default_pager_set= 0, opt_sigint_ignore= 0,
executing_query= 0, interrupted_query= 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;
@ -325,7 +326,7 @@ static void end_timer(ulong start_time,char *buff);
static void mysql_end_timer(ulong start_time,char *buff);
static void nice_time(double sec,char *buff,bool part_second);
static sig_handler mysql_end(int sig);
static sig_handler handle_sigint(int sig);
int main(int argc,char *argv[])
{
@ -408,7 +409,7 @@ int main(int argc,char *argv[])
if (opt_sigint_ignore)
signal(SIGINT, SIG_IGN);
else
signal(SIGINT, mysql_end); // Catch SIGINT to clean up
signal(SIGINT, handle_sigint); // Catch SIGINT to clean up
signal(SIGQUIT, mysql_end); // Catch SIGQUIT to clean up
/*
@ -502,6 +503,35 @@ sig_handler mysql_end(int sig)
}
/*
This function handles sigint calls
If query is in process, kill query
no query in process, terminate like previous behavior
*/
sig_handler handle_sigint(int sig)
{
char kill_buffer[40];
MYSQL *kill_mysql= NULL;
/* terminate if no query being executed, or we already tried interrupting */
if (!executing_query || interrupted_query)
mysql_end(sig);
kill_mysql= mysql_init(kill_mysql);
if (!mysql_real_connect(kill_mysql,current_host, current_user, opt_password,
"", opt_mysql_port, opt_mysql_unix_port,0))
mysql_end(sig);
/* kill_buffer is always big enough because max length of %lu is 15 */
sprintf(kill_buffer, "KILL /*!50000 QUERY */ %lu", mysql_thread_id(&mysql));
mysql_real_query(kill_mysql, kill_buffer, strlen(kill_buffer));
mysql_close(kill_mysql);
tee_fprintf(stdout, "Query aborted by Ctrl+C\n");
interrupted_query= 1;
}
static struct my_option my_long_options[] =
{
{"help", '?', "Display this help and exit.", 0, 0, 0, GET_NO_ARG, NO_ARG, 0,
@ -1858,6 +1888,7 @@ com_go(String *buffer,char *line __attribute__((unused)))
uint error= 0;
int err= 0;
interrupted_query= 0;
if (!status.batch)
{
old_buffer= *buffer; // Save for edit command
@ -1893,7 +1924,7 @@ com_go(String *buffer,char *line __attribute__((unused)))
}
timer=start_timer();
executing_query= 1;
error= mysql_real_query_for_lazy(buffer->ptr(),buffer->length());
#ifdef HAVE_READLINE
@ -1907,6 +1938,7 @@ com_go(String *buffer,char *line __attribute__((unused)))
if (error)
{
executing_query= 0;
buffer->length(0); // Remove query on error
return error;
}
@ -1918,13 +1950,19 @@ com_go(String *buffer,char *line __attribute__((unused)))
if (quick)
{
if (!(result=mysql_use_result(&mysql)) && mysql_field_count(&mysql))
return put_error(&mysql);
{
executing_query= 0;
return put_error(&mysql);
}
}
else
{
error= mysql_store_result_for_lazy(&result);
if (error)
return error;
{
executing_query= 0;
return error;
}
}
if (verbose >= 3 || !opt_silent)
@ -1992,6 +2030,7 @@ com_go(String *buffer,char *line __attribute__((unused)))
(mysql.server_status & SERVER_STATUS_DB_DROPPED))
get_current_db();
executing_query= 0;
return error; /* New command follows */
}
@ -2122,6 +2161,8 @@ print_table_data(MYSQL_RES *result)
while ((cur= mysql_fetch_row(result)))
{
if (interrupted_query)
break;
ulong *lengths= mysql_fetch_lengths(result);
(void) tee_fputs("|", PAGER);
mysql_field_seek(result, 0);
@ -2171,6 +2212,8 @@ print_table_data_html(MYSQL_RES *result)
}
while ((cur = mysql_fetch_row(result)))
{
if (interrupted_query)
break;
ulong *lengths=mysql_fetch_lengths(result);
(void) tee_fputs("<TR>", PAGER);
for (uint i=0; i < mysql_num_fields(result); i++)
@ -2200,6 +2243,8 @@ print_table_data_xml(MYSQL_RES *result)
fields = mysql_fetch_fields(result);
while ((cur = mysql_fetch_row(result)))
{
if (interrupted_query)
break;
ulong *lengths=mysql_fetch_lengths(result);
(void) tee_fputs("\n <row>\n", PAGER);
for (uint i=0; i < mysql_num_fields(result); i++)
@ -2236,6 +2281,8 @@ print_table_data_vertically(MYSQL_RES *result)
mysql_field_seek(result,0);
for (uint row_count=1; (cur= mysql_fetch_row(result)); row_count++)
{
if (interrupted_query)
break;
mysql_field_seek(result,0);
tee_fprintf(PAGER,
"*************************** %d. row ***************************\n", row_count);