text: -- @testpoint: EXTRACT函数传入TIMESTAMP WITH TIME ZONE类型，source为EPOCH边界值不带时区，获取自1970-01-01 00:00:00-00 UTC以来的秒数
  drop table if exists test_date01;
  create table test_date01 (clo1 TIMESTAMP WITH TIME ZONE );
  insert into test_date01 values ('1970-01-01 00:00:00 ');
  select EXTRACT(EPOCH FROM clo1) from test_date01;
  SELECT EXTRACT(EPOCH FROM TIMESTAMP WITH TIME ZONE  '1970-01-01 00:00:00 ');
  SELECT EXTRACT(EPOCH FROM TIMESTAMP WITH TIME ZONE  '1970-01-01 00:00:00 ');
  SELECT EXTRACT(EPOCH FROM date '1970-01-01 00:00:00');
  drop table if exists test_date01;