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<?php
$res = array();
$res[] = tableCreate('exams', '
`examid` int(11) NOT NULL AUTO_INCREMENT,
`lectureid` char(36) CHARACTER SET ascii COLLATE ascii_bin DEFAULT NULL,
`starttime` int(11) NOT NULL,
`endtime` int(11) NOT NULL,
`autologin` char(36) NULL,
`description` varchar(500) DEFAULT NULL,
PRIMARY KEY (`examid`),
KEY `idx_daterange` ( `starttime` , `endtime` )
');
$res[] = tableCreate('exams_x_location', '
`examid` int(11) NOT NULL,
`locationid` int(11) NULL,
UNIQUE KEY (`examid`, `locationid`),
KEY (`locationid`)
');
if (!tableHasColumn('exams', 'lectureid')) {
$ret = Database::exec("ALTER TABLE `exams` ADD `lectureid` CHAR(36) CHARACTER SET ascii COLLATE ascii_bin NULL DEFAULT NULL AFTER `examid`");
if ($ret === false) {
finalResponse(UPDATE_FAILED, 'Adding lectureid to exams failed: ' . Database::lastError());
}
$res[] = UPDATE_DONE;
}
if (!tableHasColumn('exams', 'autologin')) {
$ret = Database::exec("ALTER TABLE `exams` ADD `autologin` CHAR(36) NULL DEFAULT NULL AFTER `endtime`");
if ($ret === false) {
finalResponse(UPDATE_FAILED, 'Adding autologin to exams failed: ' . Database::lastError());
}
$res[] = UPDATE_DONE;
}
Database::exec("ALTER TABLE `exams` CHANGE `description` `description` varchar(500) NULL DEFAULT NULL");
$ex = tableGetConstraints('exams_x_location', 'locationid', 'location', 'locationid');
// 2019-07-02: Fix messed up non-NULL constraint
if ($ex !== false && $ex['CONSTRAINT_NAME'] !== 'exl_locid_null') {
tableDeleteConstraint('exams_x_location', $ex['CONSTRAINT_NAME']);
// Again for the other one
$ex = tableGetConstraints('exams_x_location', 'examid', 'exams', 'examid');
if ($ex !== false) {
tableDeleteConstraint('exams_x_location', $ex['CONSTRAINT_NAME']);
}
// Get rid of all keys so we can make locationid NULLable
Database::exec('ALTER TABLE `exams_x_location` DROP PRIMARY KEY');
$r = Database::simpleQuery('SHOW INDEX FROM exams_x_location');
while (($name = $r->fetchColumn(2)) !== false) {
Database::exec("ALTER TABLE `exams_x_location` DROP INDEX `$name`");
}
$ret = Database::exec("ALTER TABLE `exams_x_location` MODIFY `locationid` int(11) NULL");
if ($ret === false) {
finalResponse(UPDATE_FAILED, 'Making locationid NULLable failed: ' . Database::lastError());
}
// Ad our two keys; can't use PRIMARY as it doesn't allow columns that can be NULL
Database::exec('ALTER TABLE `exams_x_location` ADD UNIQUE KEY (`examid`, `locationid`), ADD KEY (`locationid`)');
}
// Constraints for locationid and examid
$res[] = tableAddConstraint('exams_x_location', 'locationid', 'location', 'locationid',
'ON DELETE CASCADE ON UPDATE CASCADE', false, 'exl_locid_null');
$res[] = tableAddConstraint('exams_x_location', 'examid', 'exams', 'examid',
'ON DELETE CASCADE ON UPDATE CASCADE');
if (in_array(UPDATE_DONE, $res)) {
finalResponse(UPDATE_DONE, 'Tables created successfully');
}
finalResponse(UPDATE_NOOP, 'Everything already up to date');
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