public void dropBaseSchema(Connection conn) {
if (!isLoaded()) {
throw new TajoInternalError("Schema files are not loaded yet.");
}
List<DatabaseObject> failedObjects = new ArrayList<>();
Statement stmt = null;
try {
stmt = conn.createStatement();
} catch (SQLException e) {
throw new TajoInternalError(e);
}
for (DatabaseObject object : catalogStore.getSchema().getObjects()) {
try {
if (DatabaseObjectType.TABLE == object.getType()
|| DatabaseObjectType.SEQUENCE == object.getType()
|| DatabaseObjectType.VIEW == object.getType()) {
stmt.executeUpdate(getDropSQL(object.getType(), object.getName()));
}
} catch (SQLException e) {
failedObjects.add(object);
}
}
CatalogUtil.closeQuietly(stmt);
if (failedObjects.size() > 0) {
StringBuffer errorMessage = new StringBuffer(64);
errorMessage.append("Failed to drop database objects ");
for (int idx = 0; idx < failedObjects.size(); idx++) {
DatabaseObject object = failedObjects.get(idx);
errorMessage.append(object.getType().toString()).append(" ").append(object.getName());
if ((idx + 1) < failedObjects.size()) {
errorMessage.append(',');
}
}
LOG.warn(errorMessage.toString());
}
}
protected List<DatabaseObject> mergeDatabaseObjects(List<DatabaseObject> objects) {
int maxIdx = -1;
for (DatabaseObject object : objects) {
maxIdx = Math.max(maxIdx, object.getOrder());
}
final List<DatabaseObject> orderedObjects = createListAndFillNull(maxIdx);
final List<DatabaseObject> unorderedObjects = new ArrayList<>();
final List<DatabaseObject> mergedObjects = new ArrayList<>();
for (DatabaseObject object : objects) {
if (object.getOrder() > -1) {
int objIdx = object.getOrder();
if (objIdx < orderedObjects.size() && orderedObjects.get(objIdx) != null) {
throw new TajoInternalError(
"This catalog configuration contains duplicated order of DatabaseObject");
}
orderedObjects.add(objIdx, object);
} else {
unorderedObjects.add(object);
}
}
for (DatabaseObject object : orderedObjects) {
if (object != null) {
mergedObjects.add(object);
}
}
for (DatabaseObject object : unorderedObjects) {
if (object != null) {
mergedObjects.add(object);
}
}
return mergedObjects;
}