相关疑难解决方法(0)

我正在尝试组合多个日期范围（我的负载大约为最多 500 个，大多数情况下为 10 个），这些日期范围可能会或可能不会重叠到最大的可能连续日期范围中。例如：

数据：

CREATE TABLE test (
  id SERIAL PRIMARY KEY NOT NULL,
  range DATERANGE
);

INSERT INTO test (range) VALUES 
  (DATERANGE('2015-01-01', '2015-01-05')),
  (DATERANGE('2015-01-01', '2015-01-03')),
  (DATERANGE('2015-01-03', '2015-01-06')),
  (DATERANGE('2015-01-07', '2015-01-09')),
  (DATERANGE('2015-01-08', '2015-01-09')),
  (DATERANGE('2015-01-12', NULL)),
  (DATERANGE('2015-01-10', '2015-01-12')),
  (DATERANGE('2015-01-10', '2015-01-12'));

表看起来像：

 id |          range
----+-------------------------
  1 | [2015-01-01,2015-01-05)
  2 | [2015-01-01,2015-01-03)
  3 | [2015-01-03,2015-01-06)
  4 | [2015-01-07,2015-01-09)
  5 | [2015-01-08,2015-01-09)
  6 | [2015-01-12,)
  7 | [2015-01-10,2015-01-12)
  8 | [2015-01-10,2015-01-12)
(8 rows)

预期结果：

         combined
--------------------------
 [2015-01-01, 2015-01-06)
 [2015-01-07, 2015-01-09)
 [2015-01-10, ) …