Examples with SCHEMA_NOT_EMPTY io.trino.spi.StandardErrorCode.SCHEMA_NOT_EMPTY used on opensource projects

Example 1 with SCHEMA_NOT_EMPTY

use of io.trino.spi.StandardErrorCode.SCHEMA_NOT_EMPTY in project trino by trinodb.

the class TrinoHiveCatalog method dropNamespace.

@Override
public void dropNamespace(ConnectorSession session, String namespace) {
    // basic sanity check to provide a better error message
    if (!listTables(session, Optional.of(namespace)).isEmpty() || !listViews(session, Optional.of(namespace)).isEmpty()) {
        throw new TrinoException(SCHEMA_NOT_EMPTY, "Schema not empty: " + namespace);
    }
    Optional<Path> location = metastore.getDatabase(namespace).orElseThrow(() -> new SchemaNotFoundException(namespace)).getLocation().map(Path::new);
    // If we see files in the schema location, don't delete it.
    // If we see no files, request deletion.
    // If we fail to check the schema location, behave according to fallback.
    boolean deleteData = location.map(path -> {
        HdfsContext context = new HdfsContext(session);
        try (FileSystem fs = hdfsEnvironment.getFileSystem(context, path)) {
            return !fs.listLocatedStatus(path).hasNext();
        } catch (IOException e) {
            log.warn(e, "Could not check schema directory '%s'", path);
            return deleteSchemaLocationsFallback;
        }
    }).orElse(deleteSchemaLocationsFallback);
    metastore.dropDatabase(namespace, deleteData);
}