Question

postgresql的新功能，甚至更新的jsonb。我正在尝试过滤一组对象：

[{"event_slug":"test_1","start_time":"2014-10-08","end_time":"2014-10-12"},
{"event_slug":"test_2","start_time":"2013-06-24","end_time":"2013-07-02"},
{"event_slug":"test_3","start_time":"2014-03-26","end_time":"2014-03-30"}]

我的查询：

SELECT l.*
FROM   locations l
     , jsonb_array_elements(l.events) e
WHERE  l.events @> '{"event_slug":"test_1"}'
AND    e->>'end_time'::timestamp >= '2014-10-30 14:04:06 -0400'::timestamptz;

我收到错误：

ERROR:  invalid input syntax for type timestamp: "end_time"
LINE 5: AND    e->>'end_time'::timestamp >= '2014-10-30 14:04:06 -04...
                   ^

Answer 1

这是运算符优先级问题：::比->>绑定得更紧密。所以你需要括号。

e->>'end_time'::timestamp

变为

(e->>'end_time')::timestamp

错误：类型为timestamp的输入语法无效：“end_time”

1 个答案: