@Override
  public void verifySchema() throws MetaException {
    // If the schema version is already checked, then go ahead and use this metastore
    if (isSchemaVerified.get()) {
      return;
    }
    checkSchema();
  }
Get partition's column stats

@return Map of column name and its stats
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/ObjectStore.java