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DROP TABLE IF EXISTS t1;
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CREATE TABLE t1 (d1 DOUBLE, d2 DOUBLE NOT NULL) ENGINE=ColumnStore;
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INSERT INTO t1 VALUES (18446744073709551614,18446744073709551614);
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SELECT d1, CAST(d1 AS UNSIGNED), CAST(d2 AS UNSIGNED) FROM t1;
|
+-----------------------+----------------------+----------------------+
|
| d1 | CAST(d1 AS UNSIGNED) | CAST(d2 AS UNSIGNED) |
|
+-----------------------+----------------------+----------------------+
|
| 1.8446744073709552e19 | 0 | 0 |
|
+-----------------------+----------------------+----------------------+
|
Looks wrong.
The expected result is:
DROP TABLE IF EXISTS t1;
|
CREATE TABLE t1 (d1 DOUBLE, d2 DOUBLE NOT NULL) ENGINE=InnoDB;
|
INSERT INTO t1 VALUES (18446744073709551614,18446744073709551614);
|
SELECT d1, CAST(d1 AS UNSIGNED), CAST(d2 AS UNSIGNED) FROM t1;
|
+-----------------------+----------------------+----------------------+
|
| d1 | CAST(d1 AS UNSIGNED) | CAST(d2 AS UNSIGNED) |
|
+-----------------------+----------------------+----------------------+
|
| 1.8446744073709552e19 | 18446744073709551615 | 18446744073709551615 |
|
+-----------------------+----------------------+----------------------+
|
The problem happens in this piece of the code in Func_cast_unsigned::getUintVal():
289 case execplan::CalpontSystemCatalog::FLOAT:
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290 case execplan::CalpontSystemCatalog::UFLOAT:
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291 case execplan::CalpontSystemCatalog::DOUBLE:
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292 case execplan::CalpontSystemCatalog::UDOUBLE:
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293 {
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294 double value = parm[0]->data()->getDoubleVal(row, isNull);
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295
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296 if (value > 0)
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297 value += 0.5;
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298 else if (value < 0)
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299 value -= 0.5;
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300
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301 uint64_t ret = (uint64_t) value; /// THIS LINE IS WRONG
|
302
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303 if (value > (double) numeric_limits<uint64_t>::max() - 2)
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304 ret = numeric_limits<int64_t>::max();
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305 else if (value < 0)
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306 ret = 0;
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307
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308 return ret;
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GDB session screenshot:
(gdb) p value
|
$4 = 1.8446744073709552e+19
|
(gdb) p ret
|
$5 = 0
|
|