case NodeTypes.AT_DROP_INDEX_NODE: {
AlterDropIndexNode dropIndexNode = (AlterDropIndexNode)node;
String name = dropIndexNode.getIndexName();
if(origTable.getIndex(name) == null) {
skipOrThrow(context, dropIndexNode.getExistenceCheck(), null, new NoSuchIndexException(name));
} else {
indexChanges.add(TableChange.createDrop(name));
}
}
break;