Error when do sql query from table name with special character

I am on Kibana and Elasticsearch 6.8. And I am trying to use sql from dev tools. Our tables name are all like 'stores.us_returnattempt' which contains some special characters like . or _. I got below error.

  "error": {
    "root_cause": [
      {
        "type": "parsing_exception",
        "reason": "line 1:27: extraneous input '.' expecting {<EOF>, ',', 'ANALYZE', 'ANALYZED', 'AS', 'CATALOGS', 'COLUMNS', 'CURRENT_DATE', 'CURRENT_TIMESTAMP', 'DAY', 'DEBUG', 'EXECUTABLE', 'EXPLAIN', 'FIRST', 'FORMAT', 'FULL', 'FUNCTIONS', 'GRAPHVIZ', 'GROUP', 'HAVING', 'HOUR', 'INNER', 'INTERVAL', 'JOIN', 'LAST', 'LEFT', 'LIMIT', 'MAPPED', 'MINUTE', 'MONTH', 'NATURAL', 'OPTIMIZED', 'ORDER', 'PARSED', 'PHYSICAL', 'PLAN', 'RIGHT', 'RLIKE', 'QUERY', 'SCHEMAS', 'SECOND', 'SHOW', 'SYS', 'TABLES', 'TEXT', 'TYPE', 'TYPES', 'VERIFY', 'WHERE', 'YEAR', '{LIMIT', IDENTIFIER, DIGIT_IDENTIFIER, QUOTED_IDENTIFIER, BACKQUOTED_IDENTIFIER}"
      }
    ],
    "type": "parsing_exception",
    "reason": "line 1:27: extraneous input '.' expecting {<EOF>, ',', 'ANALYZE', 'ANALYZED', 'AS', 'CATALOGS', 'COLUMNS', 'CURRENT_DATE', 'CURRENT_TIMESTAMP', 'DAY', 'DEBUG', 'EXECUTABLE', 'EXPLAIN', 'FIRST', 'FORMAT', 'FULL', 'FUNCTIONS', 'GRAPHVIZ', 'GROUP', 'HAVING', 'HOUR', 'INNER', 'INTERVAL', 'JOIN', 'LAST', 'LEFT', 'LIMIT', 'MAPPED', 'MINUTE', 'MONTH', 'NATURAL', 'OPTIMIZED', 'ORDER', 'PARSED', 'PHYSICAL', 'PLAN', 'RIGHT', 'RLIKE', 'QUERY', 'SCHEMAS', 'SECOND', 'SHOW', 'SYS', 'TABLES', 'TEXT', 'TYPE', 'TYPES', 'VERIFY', 'WHERE', 'YEAR', '{LIMIT', IDENTIFIER, DIGIT_IDENTIFIER, QUOTED_IDENTIFIER, BACKQUOTED_IDENTIFIER}"
  },
  "status": 400
}

How can I query index with '.' ? I even try wildcard like 'stores*' and got similar error complaining about *.

Is there anybody help me see what should I do?

Thanks!!

@jasmineL you simply need to place your index name inside double quotes. More about this here in the docs.