@Override
    public Collection<String> getSystemSchemas() {
        return SYSTEM_SCHEMAS;
    }
@Test
    void assertGetSystemSchemas() {
        assertThat(systemDatabase.getSystemSchemas(), is(new HashSet<>(Arrays.asList("information_schema", "pg_catalog", "blockchain",
                "cstore", "db4ai", "dbe_perf", "dbe_pldebugger", "gaussdb", "oracle", "pkg_service", "snapshot", "sqladvisor", "dbe_pldeveloper", "pg_toast", "pkg_util", "shardingsphere"))));
    }