liquibase.exception.UnexpectedLiquibaseException Java Examples

private Set<Integer> currentIdsInDatabaseChangeLogLockTable() throws DatabaseException {
    try {
        Executor executor = ExecutorService.getInstance().getExecutor(database);
        String idColumnName = database.escapeColumnName(database.getLiquibaseCatalogName(),
                database.getLiquibaseSchemaName(),
                database.getDatabaseChangeLogLockTableName(),
                "ID");
        String lockTableName = database.escapeTableName(database.getLiquibaseCatalogName(),
                database.getLiquibaseSchemaName(),
                database.getDatabaseChangeLogLockTableName());
        SqlStatement sqlStatement = new RawSqlStatement("SELECT " + idColumnName + " FROM " + lockTableName);
        List<Map<String, ?>> rows = executor.queryForList(sqlStatement);
        Set<Integer> ids = rows.stream().map(columnMap -> ((Number) columnMap.get("ID")).intValue()).collect(Collectors.toSet());
        database.commit();
        return ids;
    } catch (UnexpectedLiquibaseException ulie) {
        // It can happen with MariaDB Galera 10.1 that UnexpectedLiquibaseException is rethrown due the DB lock.
        // It is sufficient to just rollback transaction and retry in that case.
        if (ulie.getCause() != null && ulie.getCause() instanceof DatabaseException) {
            throw (DatabaseException) ulie.getCause();
        } else {
            throw ulie;
        }
    }
}
 

/**
 * Indicates if the <code>GEOMETRY_COLUMNS</code> table or view exists.
 * 
 * @param database
 *           the database to check.
 * @return <code>true</code> if the table or view exists.
 */
public static boolean geometryColumnsExists(final Database database) {
   String geometryColumnsName = database.correctObjectName(
         "geometry_columns", Table.class);
   DatabaseObject example = null;
   if (database instanceof DerbyDatabase || database instanceof H2Database) {
      final Table tableExample = new Table();
      tableExample.setName(geometryColumnsName);
      tableExample.setSchema(database.getDefaultCatalogName(),
            database.getDefaultSchemaName());
      example = tableExample;
   } else if (database instanceof PostgresDatabase) {
      final View viewExample = new View();
      viewExample.setName(geometryColumnsName);
      viewExample.setSchema(database.getDefaultCatalogName(), "public");
      example = viewExample;
   }
   try {
      return example != null
            && SnapshotGeneratorFactory.getInstance().has(example, database);
   } catch (final LiquibaseException e) {
      throw new UnexpectedLiquibaseException(
            "Failed to determine if the geometry_columns table or view exists",
            e);
   }
}
 

/**
 * @see liquibase.serializer.LiquibaseSerializable#getSerializableFieldValue(java.lang.String)
 */
@Override
public Object getSerializableFieldValue(final String field) {
   final Object value;
   if ("catalogName".equals(field)) {
      value = getCatalogName();
   } else if ("schemaName".equals(field)) {
      value = getSchemaName();
   } else if ("tableName".equals(field)) {
      value = getTableName();
   } else if ("columnNames".equals(field)) {
      value = getColumnNames();
   } else if ("indexName".equals(field)) {
      value = getIndexName();
   } else {
      throw new UnexpectedLiquibaseException("Unexpected field request on "
            + getSerializedObjectName() + ": " + field);
   }
   return value;
}
 

public static DataSource getDataSource(String liquibaseChangelogLocation) throws Exception {
    // create a hsql in memory connection
    Connection connection = createH2InMemory();

    // Create the schema for unit testing
    Database liquibaseDb = DatabaseFactory.getInstance()
                                          .findCorrectDatabaseImplementation(new JdbcConnection(connection));
    Liquibase lq = new Liquibase(liquibaseChangelogLocation, new ClassLoaderResourceAccessor(), liquibaseDb);
    try {
        lq.update("");
    } catch (MigrationFailedException e) {
        // catch the exception because in PopulateConfigurationRegistrySpaceIdColumnChange liquibase change there is rest call
        if (e.getCause()
             .getClass() != UnexpectedLiquibaseException.class) {
            throw e;
        }
    }

    // Initialize the fileService to use our in-memory connection through a pool emulation (so
    // that close releases rather than close)
    return new SingleConnectionDataSource(connection, true);
}
 

/**
 * @see liquibase.datatype.LiquibaseDataType#sqlToObject(java.lang.String,
 *      liquibase.database.Database)
 */
@Override
public Object sqlToObject(final String value, final Database database) {
   final Geometry returnValue;
   if (value == null || value.equalsIgnoreCase("null")) {
      returnValue = null;
   } else {
      final WKTReader reader = new WKTReader();
      try {
         // TODO: Check for SRID.
         returnValue = reader.read(value);
      } catch (final ParseException e) {
         throw new UnexpectedLiquibaseException("Cannot parse " + value + " to a Geometry", e);
      }
   }
   return returnValue;
}
 

/**
 * Generates the SQL statement to drop the spatial index if it exists.
 * 
 * @param statement
 *           the drop spatial index statement.
 * @param database
 *           the database.
 * @return the drop spatial index statement, if the index exists.
 */
public Sql[] generateSqlIfExists(final DropSpatialIndexStatement statement,
      final Database database) {
   final String catalogName = statement.getTableCatalogName();
   final String schemaName = statement.getTableSchemaName();
   final String tableName = statement.getTableName();
   final SpatialIndexExistsPrecondition precondition = new SpatialIndexExistsPrecondition();
   precondition.setCatalogName(catalogName);
   precondition.setSchemaName(schemaName);
   precondition.setTableName(tableName);
   final DatabaseObject example = precondition.getExample(database, tableName);
   try {
      // If a spatial index exists on the table, drop it.
      if (SnapshotGeneratorFactory.getInstance().has(example, database)) {
         return generateSql(statement, database, null);
      }
   } catch (final Exception e) {
      throw new UnexpectedLiquibaseException(e);
   }
   return new Sql[0];
}
 

/**
 * @see liquibase.datatype.LiquibaseDataType#objectToSql(java.lang.Object,
 *      liquibase.database.Database)
 */
@Override
public String objectToSql(final Object value, final Database database) {
   final String returnValue;
   if (value instanceof Geometry) {
      // TODO: Tailor the output for the database.
      returnValue = ((Geometry) value).toText();
   } else if (value instanceof String) {
      returnValue = value.toString();
   } else if (value instanceof DatabaseFunction) {
      returnValue = value.toString();
   } else if (value == null || value.toString().equalsIgnoreCase("null")) {
      returnValue = null;
   } else {
      throw new UnexpectedLiquibaseException("Cannot convert type " + value.getClass()
            + " to a Geometry value");
   }
   return returnValue;
}
 

/**
 * Queries to the database to convert the given EPSG SRID to the corresponding Oracle SRID.
 *
 * @param srid
 *           the EPSG SRID.
 * @param database
 *           the database instance.
 * @return the corresponding Oracle SRID.
 */
public static String loadOracleSrid(final String srid, final Database database) {
   final String oracleSrid;
   final JdbcConnection jdbcConnection = (JdbcConnection) database.getConnection();
   final Connection connection = jdbcConnection.getUnderlyingConnection();
   Statement statement = null;
   try {
      statement = connection.createStatement();
      final ResultSet resultSet = statement.executeQuery("SELECT " + EPSG_TO_ORACLE_FUNCTION
            + "(" + srid + ") FROM dual");
      resultSet.next();
      oracleSrid = resultSet.getString(1);
   } catch (final SQLException e) {
      throw new UnexpectedLiquibaseException("Failed to find the Oracle SRID for EPSG:" + srid,
            e);
   } finally {
      try {
         statement.close();
      } catch (final SQLException ignore) {
      }
   }
   return oracleSrid;
}
 

@Override
public boolean isDatabaseChangeLogLockTableInitialized(boolean tableJustCreated) throws DatabaseException {
    try {
        return super.isDatabaseChangeLogLockTableInitialized(tableJustCreated);
    } catch (UnexpectedLiquibaseException ulie) {
        // It can happen with MariaDB Galera 10.1 that UnexpectedLiquibaseException is rethrown due the DB lock. It is sufficient to just rollback transaction and retry in that case.
        if (ulie.getCause() != null && ulie.getCause() instanceof DatabaseException) {
            throw (DatabaseException) ulie.getCause();
        } else {
            throw ulie;
        }
    }
}
 

/**
 * Determines if the given column is in <code>GEOMETRY_COLUMNS</code>.
 * 
 * @param database
 *           the database to query.
 * @param schemaName
 *           the schema name.
 * @param tableName
 *           the table name.
 * @param columnName
 *           the column name.
 * @return <code>true</code> if the column is a geometry column.
 */
public static boolean isGeometryColumn(final Database database,
      final String schemaName, final String tableName,
      final String columnName) {
   boolean isSpatialColumn = false;
   Statement jdbcStatement = null;
   try {
      if (geometryColumnsExists(database)) {
         final String query = "SELECT * FROM geometry_columns WHERE f_table_schema = '"
               + (schemaName == null ? database.getDefaultSchemaName()
                     : schemaName)
               + "' AND f_table_name = '"
               + tableName
               + "' AND upper(f_geometry_column) = '"
               + columnName.toUpperCase() + "'";
         final DatabaseConnection databaseConnection = database
               .getConnection();
         final JdbcConnection jdbcConnection = (JdbcConnection) databaseConnection;
         jdbcStatement = jdbcConnection.getUnderlyingConnection()
               .createStatement();
         final ResultSet rs = jdbcStatement.executeQuery(query);
         isSpatialColumn = rs.next();
      }
   } catch (final SQLException e) {
      throw new UnexpectedLiquibaseException(
            "Failed to determine if the column to be dropped is a geometry column",
            e);
   } finally {
      if (jdbcStatement != null) {
         try {
            jdbcStatement.close();
         } catch (final SQLException ignore) {
         }
      }
   }
   return isSpatialColumn;
}
 

/**
 * Determines if the given table is in <code>GEOMETRY_COLUMNS</code> and,
 * therefore, has a geometry column.
 * 
 * @param database
 *           the database to query.
 * @param schemaName
 *           the schema name.
 * @param tableName
 *           the table name to check.
 * @return <code>true</code> if the table has a geometry column.
 */
public static boolean hasGeometryColumn(final Database database,
      final String schemaName, final String tableName) {
   boolean isSpatialColumn = false;
   Statement jdbcStatement = null;
   try {
      if (geometryColumnsExists(database)) {
         final String query = "SELECT * FROM geometry_columns WHERE f_table_schema = '"
               + (schemaName == null ? database.getDefaultSchemaName()
                     : schemaName)
               + "' AND f_table_name = '"
               + tableName
               + "'";
         final DatabaseConnection databaseConnection = database
               .getConnection();
         final JdbcConnection jdbcConnection = (JdbcConnection) databaseConnection;
         jdbcStatement = jdbcConnection.getUnderlyingConnection()
               .createStatement();
         final ResultSet rs = jdbcStatement.executeQuery(query);
         isSpatialColumn = rs.next();
      }
   } catch (final SQLException e) {
      throw new UnexpectedLiquibaseException(
            "Failed to determine if the table has a geometry column", e);
   } finally {
      if (jdbcStatement != null) {
         try {
            jdbcStatement.close();
         } catch (final SQLException ignore) {
         }
      }
   }
   return isSpatialColumn;
}
 

@Override
public Sql[] generateSql(final DropSpatialIndexStatement statement, final Database database,
      final SqlGeneratorChain sqlGeneratorChain) {
   final String indexName = statement.getIndexName();
   final Index example = new Index().setName(indexName);
   if (statement.getTableName() != null) {
      example.setTable((Table) new Table().setName(statement.getTableName()).setSchema(
            statement.getTableCatalogName(), statement.getTableSchemaName()));
   }
   Index index;
   try {
      index = SnapshotGeneratorFactory.getInstance().createSnapshot(example, database);
   } catch (final Exception e) {
      throw new UnexpectedLiquibaseException("Failed to create a snapshot of '" + indexName
            + "'", e);
   }

   final String tableName = index.getTable().getName();
   final Column column = index.getColumns().get(0);

   final StringBuilder sql = new StringBuilder();
   sql.append("DELETE FROM user_sdo_geom_metadata ");
   sql.append("WHERE table_name = '").append(database.correctObjectName(tableName, Table.class));
   sql.append("' AND column_name = '").append(
         database.correctObjectName(column.getName(), Column.class));
   sql.append("'");
   final UnparsedSql deleteMetadata = new UnparsedSql(sql.toString(),
         new View().setName("user_sdo_geom_metadata"));
   return new Sql[] { deleteMetadata };
}
 

private String addForeignKeyConstraint(AddColumnConfig column, Database database) {
    String result = "";
    ConstraintsConfig constraintsConfig = column.getConstraints();
    if (constraintsConfig != null && (StringUtil.isNotEmpty(constraintsConfig.getReferences()) || StringUtil.isNotEmpty(constraintsConfig.getReferencedTableName()) )) {
        result += ", ADD ";
        if (StringUtil.isNotEmpty(constraintsConfig.getForeignKeyName())) {
            result += "CONSTRAINT " + database.escapeConstraintName(constraintsConfig.getForeignKeyName()) + " ";
        }
        result +=  "FOREIGN KEY ("
                + database.escapeColumnName(null, null, null, column.getName()) + ") REFERENCES ";

        String referencedTable;
        String referencedColumn;

        if (StringUtil.isNotEmpty(constraintsConfig.getReferences())) {
            Matcher references = Pattern.compile("([\\w\\._]+)\\(([\\w_]+)\\)").matcher(constraintsConfig.getReferences());
            if (!references.matches()) {
                throw new UnexpectedLiquibaseException("Unable to get table name and column name from " + constraintsConfig.getReferences());
            }
            referencedTable = references.group(1);
            referencedColumn = references.group(2);
        } else {
            referencedTable = constraintsConfig.getReferencedTableName();
            referencedColumn = constraintsConfig.getReferencedColumnNames();
        }

        referencedTable = PerconaChangeUtil.resolveReferencedPerconaTableName(getTableName(), referencedTable);

        result += database.escapeTableName(null, null, referencedTable) + "(";
        result += database.escapeColumnName(null, null, null, referencedColumn);
        result += ")";
    }
    return result;
}
 

@Override
public void destroy() throws DatabaseException {
    Database database = getDatabase();
    try {
        if (SnapshotGeneratorFactory.getInstance().has(new Table().setName(database.getDatabaseChangeLogTableName()).setSchema(database.getLiquibaseCatalogName(), database.getLiquibaseSchemaName()), database)) {
            ExecutorService.getInstance().getExecutor(database).execute(new DropTableStatement(database.getLiquibaseCatalogName(), database.getLiquibaseSchemaName(), database.getDatabaseChangeLogTableName(), false));
        }
        reset();
    } catch (InvalidExampleException e) {
        throw new UnexpectedLiquibaseException(e);
    }
}
 

private boolean hasDatabaseChangeLogTable() throws DatabaseException {
    if (hasDatabaseChangeLogTable == null) {
        try {
            hasDatabaseChangeLogTable = SnapshotGeneratorFactory.getInstance().hasDatabaseChangeLogTable(getDatabase());
        } catch (LiquibaseException e) {
            throw new UnexpectedLiquibaseException(e);
        }
    }
    return hasDatabaseChangeLogTable;
}
 

@Override
public Sql[] generateSql(MarkChangeSetRanStatement statement, Database database, SqlGeneratorChain sqlGeneratorChain) {
    ChangeSet changeSet = statement.getChangeSet();

    SqlStatement runStatement;
    try {
        if (statement.getExecType().equals(ChangeSet.ExecType.FAILED) || statement.getExecType().equals(ChangeSet.ExecType.SKIPPED)) {
            return new Sql[0]; //don't mark
        }

        String tag = null;
        for (Change change : changeSet.getChanges()) {
            if (change instanceof TagDatabaseChange) {
                TagDatabaseChange tagChange = (TagDatabaseChange) change;
                tag = tagChange.getTag();
            }
        }

        runStatement = new HiveInsertStatement(database.getLiquibaseCatalogName(), database.getLiquibaseSchemaName(), database.getDatabaseChangeLogTableName())
                .addColumnValue(changeSet.getId())
                .addColumnValue(changeSet.getAuthor())
                .addColumnValue(changeSet.getFilePath())
                .addColumnValue(DateTimeUtils.getCurrentTS("yyyy-MM-dd HH:mm:ss"))
                .addColumnValue(ChangeLogHistoryServiceFactory.getInstance().getChangeLogService(database).getNextSequenceValue())
                .addColumnValue(statement.getExecType().value)
                .addColumnValue(changeSet.generateCheckSum().toString())
                .addColumnValue(changeSet.getDescription())
                .addColumnValue(StringUtils.trimToEmpty(changeSet.getComments()))
                .addColumnValue(tag == null ? "NULL" : tag)
                .addColumnValue(ChangeLogHistoryServiceFactory.getInstance().getChangeLogService(database).getDeploymentId())
                .addColumnValue(changeSet.getContexts() == null || changeSet.getContexts().isEmpty() ? null : changeSet.getContexts().toString())
                .addColumnValue(changeSet.getLabels() == null || changeSet.getLabels().isEmpty() ? null : changeSet.getLabels().toString())
                .addColumnValue(LiquibaseUtil.getBuildVersion());
    } catch (LiquibaseException e) {
        throw new UnexpectedLiquibaseException(e);
    }

    return SqlGeneratorFactory.getInstance().generateSql(runStatement, database);
}
 

private Sql[] generateMultipleColumnSql(DropColumnStatement dropColumnStatement, Database database, Map<String, String> columnsPreserved) {
    if (columnsPreserved == null) {
        throw new UnexpectedLiquibaseException("no columns to preserve");
    }
    List<Sql> result = new ArrayList<Sql>();
    Map<String, String> columnsPreservedCopy = new HashMap<String, String>(columnsPreserved);
    String alterTable;
    List<DropColumnStatement> columns = null;

    if (dropColumnStatement.isMultiple()) {
        columns = dropColumnStatement.getColumns();
        for (DropColumnStatement statement : columns) {
            columnsPreservedCopy.remove(statement.getColumnName());
        }
        alterTable = "ALTER TABLE " + database.escapeTableName(columns.get(0).getCatalogName(), columns.get(0).getSchemaName(), columns.get(0).getTableName()) + " REPLACE COLUMNS (";
    } else {
        columnsPreservedCopy.remove(dropColumnStatement.getColumnName());
        alterTable = "ALTER TABLE " + database.escapeTableName(dropColumnStatement.getCatalogName(), dropColumnStatement.getSchemaName(), dropColumnStatement.getTableName()) + " REPLACE COLUMNS (";
    }

    int i = 0;
    for (String columnName : columnsPreservedCopy.keySet()) {
        alterTable += database.escapeObjectName(columnName, Column.class) + " " + columnsPreservedCopy.get(columnName);
        if (i < columnsPreservedCopy.size() - 1) {
            alterTable += ",";
        } else {
            alterTable += ")";
        }
        i++;
    }

    if (dropColumnStatement.isMultiple()) {
        result.add(new UnparsedSql(alterTable, getAffectedColumns(columns)));
    } else {
        result.add(new UnparsedSql(alterTable, getAffectedColumn(dropColumnStatement)));
    }
    return result.toArray(new Sql[result.size()]);
}
 

/**
 * @see liquibase.serializer.LiquibaseSerializable#getSerializableFieldValue(java.lang.String)
 */
@Override
public Object getSerializableFieldValue(final String field) {
   throw new UnexpectedLiquibaseException("Unexpected field request on "
         + getSerializedObjectName() + ": " + field);
}
 

@Override
public void init() throws DatabaseException {
    if (serviceInitialized) {
        return;
    }
    Database database = getDatabase();
    Executor executor = ExecutorService.getInstance().getExecutor(database);

    Table changeLogTable = null;
    try {
        changeLogTable = SnapshotGeneratorFactory.getInstance().getDatabaseChangeLogTable(new SnapshotControl(database, false, Table.class, Column.class), database);
    } catch (LiquibaseException e) {
        throw new UnexpectedLiquibaseException(e);
    }

    List<SqlStatement> statementsToExecute = new ArrayList<SqlStatement>();

    if (changeLogTable != null) {
        boolean hasDescription = changeLogTable.getColumn("DESCRIPTION") != null;
        boolean hasComments = changeLogTable.getColumn("COMMENTS") != null;
        boolean hasTag = changeLogTable.getColumn("TAG") != null;
        boolean hasLiquibase = changeLogTable.getColumn("LIQUIBASE") != null;
        boolean hasContexts = changeLogTable.getColumn("CONTEXTS") != null;
        boolean hasLabels = changeLogTable.getColumn("LABELS") != null;
        boolean hasOrderExecuted = changeLogTable.getColumn("ORDEREXECUTED") != null;
        boolean hasExecTypeColumn = changeLogTable.getColumn("EXECTYPE") != null;
        String charTypeName = getCharTypeName();
        boolean hasDeploymentIdColumn = changeLogTable.getColumn("DEPLOYMENT_ID") != null;

        if (!hasDescription) {
            executor.comment("Adding missing databasechangelog.description column");
            statementsToExecute.add(new AddColumnStatement(getLiquibaseCatalogName(), getLiquibaseSchemaName(), getDatabaseChangeLogTableName(), "DESCRIPTION", charTypeName, null));
        }
        if (!hasTag) {
            executor.comment("Adding missing databasechangelog.tag column");
            statementsToExecute.add(new AddColumnStatement(getLiquibaseCatalogName(), getLiquibaseSchemaName(), getDatabaseChangeLogTableName(), "TAG", charTypeName, null));
        }
        if (!hasComments) {
            executor.comment("Adding missing databasechangelog.comments column");
            statementsToExecute.add(new AddColumnStatement(getLiquibaseCatalogName(), getLiquibaseSchemaName(), getDatabaseChangeLogTableName(), "COMMENTS", charTypeName, null));
        }
        if (!hasLiquibase) {
            executor.comment("Adding missing databasechangelog.liquibase column");
            statementsToExecute.add(new AddColumnStatement(getLiquibaseCatalogName(), getLiquibaseSchemaName(), getDatabaseChangeLogTableName(), "LIQUIBASE", charTypeName, null));
        }
        if (!hasOrderExecuted) {
            executor.comment("Adding missing databasechangelog.orderexecuted column");
            statementsToExecute.add(new AddColumnStatement(getLiquibaseCatalogName(), getLiquibaseSchemaName(), getDatabaseChangeLogTableName(), "ORDEREXECUTED", "int", null));
        }
        if (!hasExecTypeColumn) {
            executor.comment("Adding missing databasechangelog.exectype column");
            statementsToExecute.add(new AddColumnStatement(getLiquibaseCatalogName(), getLiquibaseSchemaName(), getDatabaseChangeLogTableName(), "EXECTYPE", charTypeName, null));
        }

        if (!hasContexts) {
            executor.comment("Adding missing databasechangelog.contexts column");
            statementsToExecute.add(new AddColumnStatement(getLiquibaseCatalogName(), getLiquibaseSchemaName(), getDatabaseChangeLogTableName(), "CONTEXTS", charTypeName, null));
        }

        if (!hasLabels) {
            executor.comment("Adding missing databasechangelog.labels column");
            statementsToExecute.add(new AddColumnStatement(getLiquibaseCatalogName(), getLiquibaseSchemaName(), getDatabaseChangeLogTableName(), "LABELS", charTypeName, null));
        }

        if (!hasDeploymentIdColumn) {
            executor.comment("Adding missing databasechangelog.deployment_id column");
            statementsToExecute.add(new AddColumnStatement(getLiquibaseCatalogName(), getLiquibaseSchemaName(), getDatabaseChangeLogTableName(), "DEPLOYMENT_ID", charTypeName, null));
        }
    } else {
        executor.comment("Create Database Change Log Table");
        SqlStatement createTableStatement = new CreateDatabaseChangeLogTableStatement();
        if (!canCreateChangeLogTable()) {
            throw new DatabaseException("Cannot create " + getDatabase().escapeTableName(getLiquibaseCatalogName(), getLiquibaseSchemaName(), getDatabaseChangeLogTableName()) + " table for your getDatabase().\n\n" +
                    "Please construct it manually using the following SQL as a base and re-run Liquibase:\n\n" +
                    createTableStatement);
        }
        // If there is no table in the database for recording change history create one.
        statementsToExecute.add(createTableStatement);
        LOG.info("Creating database history table with name: " + getDatabase().escapeTableName(getLiquibaseCatalogName(), getLiquibaseSchemaName(), getDatabaseChangeLogTableName()));
    }

    for (SqlStatement sql : statementsToExecute) {
        if (SqlGeneratorFactory.getInstance().supports(sql, database)) {
            executor.execute(sql);
            getDatabase().commit();
        } else {
            LOG.info("Cannot run " + sql.getClass().getSimpleName() + " on " + getDatabase().getShortName() + " when checking databasechangelog table");
        }
    }
    serviceInitialized = true;
}
 

@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);
            LogService.getLog(getClass()).debug(LogType.LOG, 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();
        CompareControl compareControl = new CompareControl(
            new CompareControl.SchemaComparison[]{
                new CompareControl.SchemaComparison(
                    CatalogAndSchema.DEFAULT,
                    schemaToDrop)},
            snapshot.getSnapshotControl().getTypesToInclude());
        DiffResult diffResult = DiffGeneratorFactory.getInstance().compare(
            new EmptyDatabaseSnapshot(this),
            snapshot,
            compareControl);

        List<ChangeSet> changeSets = new DiffToChangeLog(diffResult, new DiffOutputControl(true, true, false, null).addIncludedSchema(schemaToDrop)).generateChangeSets();
        LogService.getLog(getClass()).debug(LogType.LOG, 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);
        LogService.getLog(getClass()).info(LogType.LOG, String.format("Successfully deleted all supported object types in schema %s.", schemaToDrop.toString()));
    } finally {
        this.setObjectQuotingStrategy(currentStrategy);
        this.commit();
    }
}