Question

我在名为EVENTS的列下有一个名为flow_flowrun的表和一个json对象数组，如下所示：

[{"msg": {"urn": "tel:+1238948372", "text": "Would you like to JOIN, reply now", "uuid": "34567a-a634-4c1d-a0a5-56788", "channel": {"name": "*56789", "uuid": "b5bc6e6c-ad18-493f-b28f-744627e739f7"}}, "type": "msg_created", "step_uuid": "a4fg6hh-9419-43a4-tgdv-39a4edc78d69", "created_on": "2015-09-21T06:10:12.217880+00:00"}]

[{"msg": {"urn": "tel:+1294472830", "text": "Hello, how do you feel today", "uuid": "533457-693d-4d67-833c-0d53e7e0ff98", "channel": {"name": "*12345", "uuid": "b5bc6e6c-ad18-493f-b28f-744627e739f7"}}, "type": "msg_created", "step_uuid": "4556763-1f5b-40a4-a29d-5fb1103f4666", "created_on": "2014-02-08T06:04:57.823739+00:00"}]

我想运行一个仅显示“文本”输出的查询。因此输出应如下所示：

消息您想加入，立即回复你好，你今天感觉如何

以此类推...

我没有运气尝试过以下内容：

SELECT jsonb_array_elements(fr.events->'msg'->'text') elem
FROM flows_flowrun fr

SELECT fr.EVENTS ->>'text'
from flows_flowrun fr

感谢您的期待。

运行上述查询时，没有任何结果。

Answer 1

您需要先扩展数组并访问该数组的成员：

SELECT jsonb_array_elements(events)->'msg'->>'text'
  FROM flows_flowrun fr

如何从PostgreSQL中的json数组查询特定对象

1 个答案: