/** Drops all objects owned by the connected user. */
@Override
public void dropDatabaseObjects(final CatalogAndSchema schemaToDrop) throws LiquibaseException {
ObjectQuotingStrategy currentStrategy = this.getObjectQuotingStrategy();
this.setObjectQuotingStrategy(ObjectQuotingStrategy.QUOTE_ALL_OBJECTS);
try {
DatabaseSnapshot snapshot;
try {
final SnapshotControl snapshotControl = new SnapshotControl(this);
final Set<Class<? extends DatabaseObject>> typesToInclude =
snapshotControl.getTypesToInclude();
// We do not need to remove indexes and primary/unique keys explicitly. They should be
// removed
// as part of tables.
typesToInclude.remove(Index.class);
typesToInclude.remove(PrimaryKey.class);
typesToInclude.remove(UniqueConstraint.class);
if (supportsForeignKeyDisable()) {
// We do not remove ForeignKey because they will be disabled and removed as parts of
// tables.
typesToInclude.remove(ForeignKey.class);
}
final long createSnapshotStarted = System.currentTimeMillis();
snapshot =
SnapshotGeneratorFactory.getInstance()
.createSnapshot(schemaToDrop, this, snapshotControl);
LogFactory.getLogger()
.debug(
String.format(
"Database snapshot generated in %d ms. Snapshot includes: %s",
System.currentTimeMillis() - createSnapshotStarted, typesToInclude));
} catch (LiquibaseException e) {
throw new UnexpectedLiquibaseException(e);
}
final long changeSetStarted = System.currentTimeMillis();
DiffResult diffResult =
DiffGeneratorFactory.getInstance()
.compare(
new EmptyDatabaseSnapshot(this),
snapshot,
new CompareControl(snapshot.getSnapshotControl().getTypesToInclude()));
List<ChangeSet> changeSets =
new DiffToChangeLog(
diffResult,
new DiffOutputControl(true, true, false).addIncludedSchema(schemaToDrop))
.generateChangeSets();
LogFactory.getLogger()
.debug(
String.format(
"ChangeSet to Remove Database Objects generated in %d ms.",
System.currentTimeMillis() - changeSetStarted));
boolean previousAutoCommit = this.getAutoCommitMode();
this.commit(); // clear out currently executed statements
this.setAutoCommit(false); // some DDL doesn't work in autocommit mode
final boolean reEnableFK = supportsForeignKeyDisable() && disableForeignKeyChecks();
try {
for (ChangeSet changeSet : changeSets) {
changeSet.setFailOnError(false);
for (Change change : changeSet.getChanges()) {
if (change instanceof DropTableChange) {
((DropTableChange) change).setCascadeConstraints(true);
}
SqlStatement[] sqlStatements = change.generateStatements(this);
for (SqlStatement statement : sqlStatements) {
ExecutorService.getInstance().getExecutor(this).execute(statement);
}
}
this.commit();
}
} finally {
if (reEnableFK) {
enableForeignKeyChecks();
}
}
ChangeLogHistoryServiceFactory.getInstance().getChangeLogService(this).destroy();
LockServiceFactory.getInstance().getLockService(this).destroy();
this.setAutoCommit(previousAutoCommit);
} finally {
this.setObjectQuotingStrategy(currentStrategy);
this.commit();
}
}
/**
* Drops all objects owned by the connected user.
*
* @param schema
*/
@Override
public void dropDatabaseObjects(String schema) throws DatabaseException {
try {
DatabaseSnapshotGeneratorFactory factory = DatabaseSnapshotGeneratorFactory.getInstance();
SnapshotContext context = new SnapshotContext();
context.setDatabase(this);
context.setSchema(schema);
context.setListeners(new HashSet<DiffStatusListener>());
DatabaseSnapshot snapshot = factory.createSnapshot(context);
List<Change> dropChanges = new ArrayList<Change>();
for (View view : snapshot.getViews()) {
DropViewChange dropChange = new DropViewChange();
dropChange.setViewName(view.getName());
dropChange.setSchemaName(schema);
dropChanges.add(dropChange);
}
if (!supportsForeignKeyDisable()) {
for (ForeignKey fk : snapshot.getForeignKeys()) {
DropForeignKeyConstraintChange dropFK = new DropForeignKeyConstraintChange();
dropFK.setBaseTableSchemaName(schema);
dropFK.setBaseTableName(fk.getForeignKeyTable().getName());
dropFK.setConstraintName(fk.getName());
dropChanges.add(dropFK);
}
}
// for (Index index : snapshotGenerator.getIndexes()) {
// DropIndexChange dropChange = new DropIndexChange();
// dropChange.setIndexName(index.getName());
// dropChange.setSchemaName(schema);
// dropChange.setTableName(index.getTableName());
//
// dropChanges.add(dropChange);
// }
for (Table table : snapshot.getTables()) {
DropTableChange dropChange = new DropTableChange();
dropChange.setSchemaName(schema);
dropChange.setTableName(table.getName());
if (supportsDropTableCascadeConstraints()) {
dropChange.setCascadeConstraints(true);
}
dropChanges.add(dropChange);
}
if (this.supportsSequences()) {
for (Sequence seq : snapshot.getSequences()) {
DropSequenceChange dropChange = new DropSequenceChange();
dropChange.setSequenceName(seq.getName());
dropChange.setSchemaName(schema);
dropChanges.add(dropChange);
}
}
if (snapshot.hasDatabaseChangeLogTable()) {
dropChanges.add(new AnonymousChange(new ClearDatabaseChangeLogTableStatement(schema)));
}
final boolean reEnableFK = supportsForeignKeyDisable() && disableForeignKeyChecks();
try {
for (Change change : dropChanges) {
for (SqlStatement statement : change.generateStatements(this)) {
ExecutorService.getInstance().getExecutor(this).execute(statement);
}
}
} finally {
if (reEnableFK) {
enableForeignKeyChecks();
}
}
} finally {
this.commit();
}
}