/**
* {@inheritdoc}
*/
public function getModifyTableDDL(TableDiff $tableDiff)
{
$ret = parent::getModifyTableDDL($tableDiff);
$fromTable = $tableDiff->getFromTable();
$toTable = $tableDiff->getToTable();
$hasTrigger = $this->hasTrigger($fromTable);
// if from-table has a trigger but to-table don't need it anymore, then drop it
$needDrop = $hasTrigger && !$this->hasCompositeNumberRangeBehavior($toTable);
// if from-table has no trigger but to-table wants one, create it
$needCreate = !$hasTrigger && $this->hasCompositeNumberRangeBehavior($toTable);
switch (true) {
case $needCreate:
$ret .= $this->createTriggerDDL($toTable);
break;
case $needDrop:
$ret .= $this->createDropTriggerDDL($toTable);
break;
}
return $ret;
}
