Mirrors
/
mariadb
mirror of https://github.com/MariaDB/server
3
0
Fork 0
Code Releases Activity
Browse Source

Bug #45261 : Crash, stored procedure + decimal 

Bug #48370  Absolutely wrong calculations with GROUP BY and
  decimal fields when using IF

Added the test cases in the above two bugs for regression
testing.
Added additional tests that demonstrate a incomplete fix.
Added a new factory method for Field_new_decimal to 
create a field from an (decimal returning) Item.
In the new method made sure that all the precision and 
length variables are capped in a proper way. 
This is required because Item's can have larger precision
than the decimal fields and thus need to be capped when
creating a field based on an Item type.
Fixed the wrong typecast to Item_decimal.
pull/374/head
Georgi Kodinov 16 years ago
parent
fad34c34cf
commit
a21cd97c35
8 changed files with 560 additions and 85 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 284
      mysql-test/r/type_newdecimal.result
  2. 226
      mysql-test/t/type_newdecimal.test
  3. 44
      sql/field.cc
  4. 1
      sql/field.h
  5. 4
      sql/item.cc
  6. 39
      sql/item_func.cc
  7. 6
      sql/item_sum.cc
  8. 41
      sql/sql_select.cc

284
mysql-test/r/type_newdecimal.result
View File

@ -1630,3 +1630,287 @@ SELECT my_col FROM t1;
my_col
0.012345687012345687012345687012
DROP TABLE t1;
#
# Bug#45261: Crash, stored procedure + decimal
#
DROP TABLE IF EXISTS t1;
CREATE TABLE t1 SELECT
/* 81 */ 100000000000000000000000000000000000000000000000000000000000000000000000000000001
AS c1;
Warnings:
Warning 1264 Out of range value for column 'c1' at row 1
DESC t1;
Field Type Null Key Default Extra
c1 decimal(65,0) NO 0
SELECT * FROM t1;
c1
99999999999999999999999999999999999999999999999999999999999999999
DROP TABLE t1;
CREATE TABLE t1 SELECT
/* 81 */ 100000000000000000000000000000000000000000000000000000000000000000000000000000001.
AS c1;
Warnings:
Warning 1264 Out of range value for column 'c1' at row 1
DESC t1;
Field Type Null Key Default Extra
c1 decimal(65,0) NO 0
SELECT * FROM t1;
c1
99999999999999999999999999999999999999999999999999999999999999999
DROP TABLE t1;
CREATE TABLE t1 SELECT
/* 81 */ 100000000000000000000000000000000000000000000000000000000000000000000000000000001.1 /* 1 */
AS c1;
Warnings:
Warning 1264 Out of range value for column 'c1' at row 1
DESC t1;
Field Type Null Key Default Extra
c1 decimal(65,0) NO 0
SELECT * FROM t1;
c1
99999999999999999999999999999999999999999999999999999999999999999
DROP TABLE t1;
CREATE TABLE t1 SELECT
/* 82 */ 1000000000000000000000000000000000000000000000000000000000000000000000000000000001
AS c1;
Warnings:
Error 1292 Truncated incorrect DECIMAL value: ''
DESC t1;
Field Type Null Key Default Extra
c1 decimal(65,0) NO 0
SELECT * FROM t1;
c1
99999999999999999999999999999999999999999999999999999999999999999
DROP TABLE t1;
CREATE TABLE t1 SELECT
/* 40 */ 1000000000000000000000000000000000000001.1000000000000000000000000000000000000001 /* 40 */
AS c1;
Warnings:
Warning 1264 Out of range value for column 'c1' at row 1
DESC t1;
Field Type Null Key Default Extra
c1 decimal(65,30) NO 0.000000000000000000000000000000
SELECT * FROM t1;
c1
99999999999999999999999999999999999.999999999999999999999999999999
DROP TABLE t1;
CREATE TABLE t1 SELECT
/* 1 */ 1.10000000000000000000000000000000000000000000000000000000000000000000000000000001 /* 80 */
AS c1;
DESC t1;
Field Type Null Key Default Extra
c1 decimal(31,30) NO 0.000000000000000000000000000000
SELECT * FROM t1;
c1
1.100000000000000000000000000000
DROP TABLE t1;
CREATE TABLE t1 SELECT
/* 1 */ 1.100000000000000000000000000000000000000000000000000000000000000000000000000000001 /* 81 */
AS c1;
DESC t1;
Field Type Null Key Default Extra
c1 decimal(31,30) NO 0.000000000000000000000000000000
SELECT * FROM t1;
c1
1.100000000000000000000000000000
DROP TABLE t1;
CREATE TABLE t1 SELECT
.100000000000000000000000000000000000000000000000000000000000000000000000000000001 /* 81 */
AS c1;
Warnings:
Note 1265 Data truncated for column 'c1' at row 1
DESC t1;
Field Type Null Key Default Extra
c1 decimal(30,30) NO 0.000000000000000000000000000000
SELECT * FROM t1;
c1
0.100000000000000000000000000000
DROP TABLE t1;
CREATE TABLE t1 SELECT
/* 45 */ 123456789012345678901234567890123456789012345.123456789012345678901234567890123456789012345 /* 45 */
AS c1;
Warnings:
Warning 1264 Out of range value for column 'c1' at row 1
DESC t1;
Field Type Null Key Default Extra
c1 decimal(65,30) NO 0.000000000000000000000000000000
SELECT * FROM t1;
c1
99999999999999999999999999999999999.999999999999999999999999999999
DROP TABLE t1;
CREATE TABLE t1 SELECT
/* 65 */ 12345678901234567890123456789012345678901234567890123456789012345.1 /* 1 */
AS c1;
Warnings:
Warning 1264 Out of range value for column 'c1' at row 1
DESC t1;
Field Type Null Key Default Extra
c1 decimal(65,1) NO 0.0
SELECT * FROM t1;
c1
9999999999999999999999999999999999999999999999999999999999999999.9
DROP TABLE t1;
CREATE TABLE t1 SELECT
/* 66 */ 123456789012345678901234567890123456789012345678901234567890123456.1 /* 1 */
AS c1;
Warnings:
Warning 1264 Out of range value for column 'c1' at row 1
DESC t1;
Field Type Null Key Default Extra
c1 decimal(65,1) NO 0.0
SELECT * FROM t1;
c1
9999999999999999999999999999999999999999999999999999999999999999.9
DROP TABLE t1;
CREATE TABLE t1 SELECT
.123456789012345678901234567890123456789012345678901234567890123456 /* 66 */
AS c1;
Warnings:
Note 1265 Data truncated for column 'c1' at row 1
DESC t1;
Field Type Null Key Default Extra
c1 decimal(30,30) NO 0.000000000000000000000000000000
SELECT * FROM t1;
c1
0.123456789012345678901234567890
DROP TABLE t1;
CREATE TABLE t1 AS SELECT 123.1234567890123456789012345678901 /* 31 */ AS c1;
Warnings:
Note 1265 Data truncated for column 'c1' at row 1
DESC t1;
Field Type Null Key Default Extra
c1 decimal(33,30) NO 0.000000000000000000000000000000
SELECT * FROM t1;
c1
123.123456789012345678901234567890
DROP TABLE t1;
CREATE TABLE t1 SELECT 1.1 + CAST(1 AS DECIMAL(65,30)) AS c1;
DESC t1;
Field Type Null Key Default Extra
c1 decimal(65,30) NO 0.000000000000000000000000000000
SELECT * FROM t1;
c1
2.100000000000000000000000000000
DROP TABLE t1;
#
# Test that the integer and decimal parts are properly calculated.
#
CREATE TABLE t1 (a DECIMAL(30,30));
INSERT INTO t1 VALUES (0.1),(0.2),(0.3);
CREATE TABLE t2 SELECT MIN(a + 0.0000000000000000000000000000001) AS c1 FROM t1;
Warnings:
Note 1265 Data truncated for column 'c1' at row 3
DESC t2;
Field Type Null Key Default Extra
c1 decimal(32,30) YES NULL
DROP TABLE t1,t2;
CREATE TABLE t1 (a DECIMAL(30,30));
INSERT INTO t1 VALUES (0.1),(0.2),(0.3);
CREATE TABLE t2 SELECT IFNULL(a + 0.0000000000000000000000000000001, NULL) AS c1 FROM t1;
Warnings:
Note 1265 Data truncated for column 'c1' at row 1
Note 1265 Data truncated for column 'c1' at row 2
Note 1265 Data truncated for column 'c1' at row 3
DESC t2;
Field Type Null Key Default Extra
c1 decimal(34,0) YES NULL
DROP TABLE t1,t2;
CREATE TABLE t1 (a DECIMAL(30,30));
INSERT INTO t1 VALUES (0.1),(0.2),(0.3);
CREATE TABLE t2 SELECT CASE a WHEN 0.1 THEN 0.0000000000000000000000000000000000000000000000000000000000000000001 END AS c1 FROM t1;
Warnings:
Note 1265 Data truncated for column 'c1' at row 1
DESC t2;
Field Type Null Key Default Extra
c1 decimal(65,30) YES NULL
DROP TABLE t1,t2;
#
# Test that variables get maximum precision.
#
SET @decimal= 1.1;
CREATE TABLE t1 SELECT @decimal AS c1;
DESC t1;
Field Type Null Key Default Extra
c1 decimal(65,30) YES NULL
SELECT * FROM t1;
c1
1.100000000000000000000000000000
DROP TABLE t1;
#
# Bug #45261 : Crash, stored procedure + decimal
# Original test by the reporter.
#
# should not crash
CREATE TABLE t1
SELECT .123456789012345678901234567890123456789012345678901234567890123456 AS a;
Warnings:
Note 1265 Data truncated for column 'a' at row 1
DROP TABLE t1;
CREATE PROCEDURE test_proc()
BEGIN
# The las non critical CUSER definition is:
# DECLARE mycursor CURSOR FOR SELECT 1 %
# .12345678912345678912345678912345678912345678912345678912345678912 AS my_col;
DECLARE mycursor CURSOR FOR
SELECT 1 %
.123456789123456789123456789123456789123456789123456789123456789123456789123456789
AS my_col;
OPEN mycursor;
CLOSE mycursor;
END|
# should not crash
CALL test_proc();
DROP PROCEDURE test_proc;
#
# Bug #48370 Absolutely wrong calculations with GROUP BY and
# decimal fields when using IF
#
CREATE TABLE currencies (id int, rate decimal(16,4),
PRIMARY KEY (id), KEY (rate));
INSERT INTO currencies VALUES (11,0.7028);
INSERT INTO currencies VALUES (1,1);
CREATE TABLE payments (
id int,
supplier_id int,
status int,
currency_id int,
vat decimal(7,4),
PRIMARY KEY (id),
KEY currency_id (currency_id),
KEY supplier_id (supplier_id)
);
INSERT INTO payments (id,status,vat,supplier_id,currency_id) VALUES
(3001,2,0.0000,344,11), (1,2,0.0000,1,1);
CREATE TABLE sub_tasks (
id int,
currency_id int,
price decimal(16,4),
discount decimal(10,4),
payment_id int,
PRIMARY KEY (id),
KEY currency_id (currency_id),
KEY payment_id (payment_id)
) ;
INSERT INTO sub_tasks (id, price, discount, payment_id, currency_id) VALUES
(52, 12.60, 0, 3001, 11), (56, 14.58, 0, 3001, 11);
# should return 1 and the same values in col 2 and 3
select STRAIGHT_JOIN
(1 + PAY.vat) AS mult,
SUM(ROUND((SUB.price - ROUND(ROUND(SUB.price, 2) * SUB.discount, 2)) *
CUR.rate / CUR.rate, 2)
) v_net_with_discount,
SUM(ROUND((SUB.price - ROUND(ROUND(SUB.price, 2) * SUB.discount, 1)) *
CUR.rate / CUR.rate , 2)
* (1 + PAY.vat)
) v_total
from
currencies CUR, payments PAY, sub_tasks SUB
where
SUB.payment_id = PAY.id and
PAY.currency_id = CUR.id and
PAY.id > 2
group by PAY.id + 1;
mult v_net_with_discount v_total
1.0000 27.18 27.180000
DROP TABLE currencies, payments, sub_tasks;
End of 5.1 tests

226
mysql-test/t/type_newdecimal.test
View File

@ -1286,3 +1286,229 @@ CREATE TABLE t1 SELECT 1 % .1234567891234567891234567891234567891234567891234567
DESCRIBE t1;
SELECT my_col FROM t1;
DROP TABLE t1;
--echo #
--echo # Bug#45261: Crash, stored procedure + decimal
--echo #
--disable_warnings
DROP TABLE IF EXISTS t1;
--enable_warnings
CREATE TABLE t1 SELECT
/* 81 */ 100000000000000000000000000000000000000000000000000000000000000000000000000000001
AS c1;
DESC t1;
SELECT * FROM t1;
DROP TABLE t1;
CREATE TABLE t1 SELECT
/* 81 */ 100000000000000000000000000000000000000000000000000000000000000000000000000000001.
AS c1;
DESC t1;
SELECT * FROM t1;
DROP TABLE t1;
CREATE TABLE t1 SELECT
/* 81 */ 100000000000000000000000000000000000000000000000000000000000000000000000000000001.1 /* 1 */
AS c1;
DESC t1;
SELECT * FROM t1;
DROP TABLE t1;
CREATE TABLE t1 SELECT
/* 82 */ 1000000000000000000000000000000000000000000000000000000000000000000000000000000001
AS c1;
DESC t1;
SELECT * FROM t1;
DROP TABLE t1;
CREATE TABLE t1 SELECT
/* 40 */ 1000000000000000000000000000000000000001.1000000000000000000000000000000000000001 /* 40 */
AS c1;
DESC t1;
SELECT * FROM t1;
DROP TABLE t1;
CREATE TABLE t1 SELECT
/* 1 */ 1.10000000000000000000000000000000000000000000000000000000000000000000000000000001 /* 80 */
AS c1;
DESC t1;
SELECT * FROM t1;
DROP TABLE t1;
CREATE TABLE t1 SELECT
/* 1 */ 1.100000000000000000000000000000000000000000000000000000000000000000000000000000001 /* 81 */
AS c1;
DESC t1;
SELECT * FROM t1;
DROP TABLE t1;
CREATE TABLE t1 SELECT
.100000000000000000000000000000000000000000000000000000000000000000000000000000001 /* 81 */
AS c1;
DESC t1;
SELECT * FROM t1;
DROP TABLE t1;
CREATE TABLE t1 SELECT
/* 45 */ 123456789012345678901234567890123456789012345.123456789012345678901234567890123456789012345 /* 45 */
AS c1;
DESC t1;
SELECT * FROM t1;
DROP TABLE t1;
CREATE TABLE t1 SELECT
/* 65 */ 12345678901234567890123456789012345678901234567890123456789012345.1 /* 1 */
AS c1;
DESC t1;
SELECT * FROM t1;
DROP TABLE t1;
CREATE TABLE t1 SELECT
/* 66 */ 123456789012345678901234567890123456789012345678901234567890123456.1 /* 1 */
AS c1;
DESC t1;
SELECT * FROM t1;
DROP TABLE t1;
CREATE TABLE t1 SELECT
.123456789012345678901234567890123456789012345678901234567890123456 /* 66 */
AS c1;
DESC t1;
SELECT * FROM t1;
DROP TABLE t1;
CREATE TABLE t1 AS SELECT 123.1234567890123456789012345678901 /* 31 */ AS c1;
DESC t1;
SELECT * FROM t1;
DROP TABLE t1;
CREATE TABLE t1 SELECT 1.1 + CAST(1 AS DECIMAL(65,30)) AS c1;
DESC t1;
SELECT * FROM t1;
DROP TABLE t1;
--echo #
--echo # Test that the integer and decimal parts are properly calculated.
--echo #
CREATE TABLE t1 (a DECIMAL(30,30));
INSERT INTO t1 VALUES (0.1),(0.2),(0.3);
CREATE TABLE t2 SELECT MIN(a + 0.0000000000000000000000000000001) AS c1 FROM t1;
DESC t2;
DROP TABLE t1,t2;
CREATE TABLE t1 (a DECIMAL(30,30));
INSERT INTO t1 VALUES (0.1),(0.2),(0.3);
CREATE TABLE t2 SELECT IFNULL(a + 0.0000000000000000000000000000001, NULL) AS c1 FROM t1;
DESC t2;
DROP TABLE t1,t2;
CREATE TABLE t1 (a DECIMAL(30,30));
INSERT INTO t1 VALUES (0.1),(0.2),(0.3);
CREATE TABLE t2 SELECT CASE a WHEN 0.1 THEN 0.0000000000000000000000000000000000000000000000000000000000000000001 END AS c1 FROM t1;
DESC t2;
DROP TABLE t1,t2;
--echo #
--echo # Test that variables get maximum precision.
--echo #
SET @decimal= 1.1;
CREATE TABLE t1 SELECT @decimal AS c1;
DESC t1;
SELECT * FROM t1;
DROP TABLE t1;
--echo #
--echo # Bug #45261 : Crash, stored procedure + decimal
--echo # Original test by the reporter.
--echo #
--echo # should not crash
CREATE TABLE t1
SELECT .123456789012345678901234567890123456789012345678901234567890123456 AS a;
DROP TABLE t1;
delimiter |;
CREATE PROCEDURE test_proc()
BEGIN
# The las non critical CUSER definition is:
# DECLARE mycursor CURSOR FOR SELECT 1 %
# .12345678912345678912345678912345678912345678912345678912345678912 AS my_col;
DECLARE mycursor CURSOR FOR
SELECT 1 %
.123456789123456789123456789123456789123456789123456789123456789123456789123456789
AS my_col;
OPEN mycursor;
CLOSE mycursor;
END|
delimiter ;|
--echo # should not crash
CALL test_proc();
DROP PROCEDURE test_proc;
--echo #
--echo # Bug #48370 Absolutely wrong calculations with GROUP BY and
--echo # decimal fields when using IF
--echo #
CREATE TABLE currencies (id int, rate decimal(16,4),
PRIMARY KEY (id), KEY (rate));
INSERT INTO currencies VALUES (11,0.7028);
INSERT INTO currencies VALUES (1,1);
CREATE TABLE payments (
id int,
supplier_id int,
status int,
currency_id int,
vat decimal(7,4),
PRIMARY KEY (id),
KEY currency_id (currency_id),
KEY supplier_id (supplier_id)
);
INSERT INTO payments (id,status,vat,supplier_id,currency_id) VALUES
(3001,2,0.0000,344,11), (1,2,0.0000,1,1);
CREATE TABLE sub_tasks (
id int,
currency_id int,
price decimal(16,4),
discount decimal(10,4),
payment_id int,
PRIMARY KEY (id),
KEY currency_id (currency_id),
KEY payment_id (payment_id)
) ;
INSERT INTO sub_tasks (id, price, discount, payment_id, currency_id) VALUES
(52, 12.60, 0, 3001, 11), (56, 14.58, 0, 3001, 11);
--echo # should return 1 and the same values in col 2 and 3
select STRAIGHT_JOIN
(1 + PAY.vat) AS mult,
SUM(ROUND((SUB.price - ROUND(ROUND(SUB.price, 2) * SUB.discount, 2)) *
CUR.rate / CUR.rate, 2)
) v_net_with_discount,
SUM(ROUND((SUB.price - ROUND(ROUND(SUB.price, 2) * SUB.discount, 1)) *
CUR.rate / CUR.rate , 2)
* (1 + PAY.vat)
) v_total
from
currencies CUR, payments PAY, sub_tasks SUB
where
SUB.payment_id = PAY.id and
PAY.currency_id = CUR.id and
PAY.id > 2
group by PAY.id + 1;
DROP TABLE currencies, payments, sub_tasks;
--echo End of 5.1 tests

44
sql/field.cc
View File

@ -2486,6 +2486,50 @@ Field_new_decimal::Field_new_decimal(uint32 len_arg,
}
Field *Field_new_decimal::create_from_item (Item *item)
{
uint8 dec= item->decimals;
uint8 intg= item->decimal_precision() - dec;
uint32 len= item->max_length;
DBUG_ASSERT (item->result_type() == DECIMAL_RESULT);
/*
Trying to put too many digits overall in a DECIMAL(prec,dec)
will always throw a warning. We must limit dec to
DECIMAL_MAX_SCALE however to prevent an assert() later.
*/
if (dec > 0)
{
signed int overflow;
dec= min(dec, DECIMAL_MAX_SCALE);
/*
If the value still overflows the field with the corrected dec,
we'll throw out decimals rather than integers. This is still
bad and of course throws a truncation warning.
+1: for decimal point
*/
const int required_length=
my_decimal_precision_to_length(intg + dec, dec,
item->unsigned_flag);
overflow= required_length - len;
if (overflow > 0)
dec= max(0, dec - overflow); // too long, discard fract
else
/* Corrected value fits. */
len= required_length;
}
return new Field_new_decimal(len, item->maybe_null, item->name,
dec, item->unsigned_flag);
}
int Field_new_decimal::reset(void)
{
store_value(&decimal_zero);

1
sql/field.h
View File

@ -807,6 +807,7 @@ public:
uint is_equal(Create_field *new_field);
virtual const uchar *unpack(uchar* to, const uchar *from,
uint param_data, bool low_byte_first);
static Field *create_from_item (Item *);
};

4
sql/item.cc
View File

@ -4899,9 +4899,7 @@ Field *Item::tmp_table_field_from_field_type(TABLE *table, bool fixed_length)
switch (field_type()) {
case MYSQL_TYPE_DECIMAL:
case MYSQL_TYPE_NEWDECIMAL:
field= new Field_new_decimal((uchar*) 0, max_length, null_ptr, 0,
Field::NONE, name, decimals, 0,
unsigned_flag);
field= Field_new_decimal::create_from_item(this);
break;
case MYSQL_TYPE_TINY:
field= new Field_tiny((uchar*) 0, max_length, null_ptr, 0, Field::NONE,

39
sql/item_func.cc
View File

@ -451,45 +451,8 @@ Field *Item_func::tmp_table_field(TABLE *table)
return make_string_field(table);
break;
case DECIMAL_RESULT:
{
uint8 dec= decimals;
uint8 intg= decimal_precision() - dec;
uint32 len= max_length;
/*
Trying to put too many digits overall in a DECIMAL(prec,dec)
will always throw a warning. We must limit dec to
DECIMAL_MAX_SCALE however to prevent an assert() later.
*/
if (dec > 0)
{
int overflow;
dec= min(dec, DECIMAL_MAX_SCALE);
/*
If the value still overflows the field with the corrected dec,
we'll throw out decimals rather than integers. This is still
bad and of course throws a truncation warning.
*/
const int required_length=
my_decimal_precision_to_length(intg + dec, dec,
unsigned_flag);
overflow= required_length - len;
if (overflow > 0)
dec= max(0, dec - overflow); // too long, discard fract
else
/* Corrected value fits. */
len= required_length;
}
field= new Field_new_decimal(len, maybe_null, name, dec, unsigned_flag);
field= Field_new_decimal::create_from_item(this);
break;
}
case ROW_RESULT:
default:
// This case should never be chosen

6
sql/item_sum.cc
View File

@ -517,8 +517,7 @@ Field *Item_sum::create_tmp_field(bool group, TABLE *table,
name, table->s, collation.collation);
break;
case DECIMAL_RESULT:
field= new Field_new_decimal(max_length, maybe_null, name,
decimals, unsigned_flag);
field= Field_new_decimal::create_from_item(this);
break;
case ROW_RESULT:
default:
@ -1270,8 +1269,7 @@ Field *Item_sum_avg::create_tmp_field(bool group, TABLE *table,
0, name, &my_charset_bin);
}
else if (hybrid_type == DECIMAL_RESULT)
field= new Field_new_decimal(max_length, maybe_null, name,
decimals, unsigned_flag);
field= Field_new_decimal::create_from_item(this);
else
field= new Field_double(max_length, maybe_null, name, decimals, TRUE);
if (field)

41
sql/sql_select.cc
View File

@ -9466,47 +9466,8 @@ static Field *create_tmp_field_from_item(THD *thd, Item *item, TABLE *table,
new_field->set_derivation(item->collation.derivation);
break;
case DECIMAL_RESULT:
{
uint8 dec= item->decimals;
uint8 intg= ((Item_decimal *) item)->decimal_precision() - dec;
uint32 len= item->max_length;
/*
Trying to put too many digits overall in a DECIMAL(prec,dec)
will always throw a warning. We must limit dec to
DECIMAL_MAX_SCALE however to prevent an assert() later.
*/
if (dec > 0)
{
signed int overflow;
dec= min(dec, DECIMAL_MAX_SCALE);
/*
If the value still overflows the field with the corrected dec,
we'll throw out decimals rather than integers. This is still
bad and of course throws a truncation warning.
+1: for decimal point
*/
const int required_length=
my_decimal_precision_to_length(intg + dec, dec,
item->unsigned_flag);
overflow= required_length - len;
if (overflow > 0)
dec= max(0, dec - overflow); // too long, discard fract
else
/* Corrected value fits. */
len= required_length;
}
new_field= new Field_new_decimal(len, maybe_null, item->name,
dec, item->unsigned_flag);
new_field= Field_new_decimal::create_from_item(item);
break;
}
case ROW_RESULT:
default:
// This case should never be choosen

Write Preview
Loading…
Cancel
Save