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A fix for Bug#32007 select udf_function() doesn't return an error if error

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during udf initialization. The bug is spotted while working on Bug 12713.

If a user-defined function was used in a SELECT statement, and an
error would occur during UDF initialization, this error would not terminate
execution of the SELECT, but rather would be converted to a warning.

The fix is to use a stack buffer to store the message from udf_init instead
of private my_error() buffer.
This commit is contained in:
kostja@bodhi.(none) 2007-11-01 00:31:57 +03:00
parent 21fffd89cf
commit 26326ed0b7
3 changed files with 15 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
mysql-test/r/udf.result
View File

@ -11,7 +11,7 @@ RETURNS STRING SONAME "UDF_EXAMPLE_LIB";
CREATE AGGREGATE FUNCTION avgcost
RETURNS REAL SONAME "UDF_EXAMPLE_LIB";
select myfunc_double();
ERROR HY000: myfunc_double must have at least one argument
ERROR HY000: Can't initialize function 'myfunc_double'; myfunc_double must have at least one argument
select myfunc_double(1);
myfunc_double(1)
49.00
@ -24,26 +24,26 @@ select myfunc_int();
myfunc_int()
0
select lookup();
ERROR HY000: Wrong arguments to lookup; Use the source
ERROR HY000: Can't initialize function 'lookup'; Wrong arguments to lookup; Use the source
select lookup("127.0.0.1");
lookup("127.0.0.1")
127.0.0.1
select lookup(127,0,0,1);
ERROR HY000: Wrong arguments to lookup; Use the source
ERROR HY000: Can't initialize function 'lookup'; Wrong arguments to lookup; Use the source
select lookup("localhost");
lookup("localhost")
127.0.0.1
select reverse_lookup();
ERROR HY000: Wrong number of arguments to reverse_lookup; Use the source
ERROR HY000: Can't initialize function 'reverse_lookup'; Wrong number of arguments to reverse_lookup; Use the source
select reverse_lookup("127.0.0.1");
select reverse_lookup(127,0,0,1);
select reverse_lookup("localhost");
reverse_lookup("localhost")
NULL
select avgcost();
ERROR HY000: wrong number of arguments: AVGCOST() requires two arguments
ERROR HY000: Can't initialize function 'avgcost'; wrong number of arguments: AVGCOST() requires two arguments
select avgcost(100,23.76);
ERROR HY000: wrong argument type: AVGCOST() requires an INT and a REAL
ERROR HY000: Can't initialize function 'avgcost'; wrong argument type: AVGCOST() requires an INT and a REAL
create table t1(sum int, price float(24));
insert into t1 values(100, 50.00), (100, 100.00);
select avgcost(sum, price) from t1;

12
mysql-test/t/udf.test
View File

@ -35,20 +35,20 @@ eval CREATE FUNCTION reverse_lookup
eval CREATE AGGREGATE FUNCTION avgcost
RETURNS REAL SONAME "$UDF_EXAMPLE_LIB";
--error 0
--error ER_CANT_INITIALIZE_UDF
select myfunc_double();
select myfunc_double(1);
select myfunc_double(78654);
--error 1305
select myfunc_nonexist();
select myfunc_int();
--error 0
--error ER_CANT_INITIALIZE_UDF
select lookup();
select lookup("127.0.0.1");
--error 0
--error ER_CANT_INITIALIZE_UDF
select lookup(127,0,0,1);
select lookup("localhost");
--error 0
--error ER_CANT_INITIALIZE_UDF
select reverse_lookup();
# These two functions should return "localhost", but it's
@ -59,9 +59,9 @@ select reverse_lookup(127,0,0,1);
--enable_result_log
select reverse_lookup("localhost");
--error 0
--error ER_CANT_INITIALIZE_UDF
select avgcost();
--error 0
--error ER_CANT_INITIALIZE_UDF
select avgcost(100,23.76);
create table t1(sum int, price float(24));
insert into t1 values(100, 50.00), (100, 100.00);

5
sql/item_func.cc
View File

@ -2897,6 +2897,7 @@ udf_handler::fix_fields(THD *thd, Item_result_field *func,
if (u_d->func_init)
{
char init_msg_buff[MYSQL_ERRMSG_SIZE];
char *to=num_buffer;
for (uint i=0; i < arg_count; i++)
{
@ -2949,10 +2950,10 @@ udf_handler::fix_fields(THD *thd, Item_result_field *func,
}
thd->net.last_error[0]=0;
Udf_func_init init= u_d->func_init;
if ((error=(uchar) init(&initid, &f_args, thd->net.last_error)))
if ((error=(uchar) init(&initid, &f_args, init_msg_buff)))
{
my_error(ER_CANT_INITIALIZE_UDF, MYF(0),
u_d->name.str, thd->net.last_error);
u_d->name.str, init_msg_buff);
free_udf(u_d);
DBUG_RETURN(TRUE);
}