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Bug #75719 mysqli_bin_result drops datetime precision
Submitted: 2017-12-21 17:38 UTC Modified: -
Votes:1
Avg. Score:4.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: judge2005 at gmail dot com Assigned:
Status: Open Package: MySQLi related
PHP Version: 7.0.26 OS: Red Hat 6.3
Private report: No CVE-ID: None
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From: judge2005 at gmail dot com
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 [2017-12-21 17:38 UTC] judge2005 at gmail dot com
Description:
------------
If the mysql bind result mechanism is used to retrieve results from a column that is declared with sub-second precision, the extra precision is lost. This only happens with mysqlnd, not libmysqlclient, and it doesn't happen if fetch_assoc() is called.

Test script:
---------------
CREATE TABLE test (
  datetime_col datetime(3) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

commit;

insert into test values ('2017-12-05 01:02:03.456');
insert into test values ('2017-12-05 07:08:09.000');

commit;

<?php
$conn = new mysqli($servername, $username, $password, $dbname, $port);
$sql = "SELECT datetime_col from test";
$stmt = $conn->prepare($sql);
$stmt->bind_result($result);
$stmt->execute();

while($stmt->fetch()) {
        var_dump($result);
}
?>


Expected result:
----------------
string(23) "2017-12-05 01:02:03.456"
string(23) "2017-12-05 07:08:09.000"

Actual result:
--------------
string(19) "2017-12-05 01:02:03"
string(19) "2017-12-05 07:08:09"

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