title: How to extract day of week given a date in HBase and Impala without integration with hive ？
body: <p>For example, 2019-08-09 is Friday. But in <a href="https://www.cloudera.com/documentation/enterprise/latest/topics/impala_datetime_functions.html#datetime_functions" rel="nofollow noreferrer">Impala documentation</a>,I could not find any function how to extract it.</p>