Supabase/Postgres - 将嵌套的 jsonb 属性值移动到不同的字段中 - 不起作用

Question

我正在尝试运行 Postgres SQL 调用以将数据从 jsonb 字段迁移到每个属性的单独字段，但由于某种原因，该过程不适用于嵌套字段

{
  "basis": "relative",
  "defined": "2023-06-21T10:21:16.979",
  "absolute": "2023-06-30T00:00:00.000",
  "relative": {
    "value": 0,
    "period": "month"
  }
}

正在运行的 SQL 是......

update gd_task_instance
set 
scheduled_basis = CAST(scheduled->>'basis' AS TEXT),
scheduled_defined = CAST(scheduled->>'defined' as TIMESTAMP),
scheduled_absolute = CAST(scheduled->>'absolute' AS DATE),
scheduled_relative_value = CAST(scheduled->'relative->value' AS INT),
scheduled_relative_period = CAST(scheduled->'relative->>period' AS TEXT);

最后两个字段“scheduled_relative_value”和“scheduled_relative_period”未设置。

有什么建议吗？

Answer 1

找到答案...

update gd_task_instance
set 
scheduled_basis = CAST(scheduled->>'basis' AS TEXT),
scheduled_defined = CAST(scheduled->>'defined' as TIMESTAMP),
scheduled_absolute = CAST(scheduled->>'absolute' AS DATE),
scheduled_relative_value = CAST(scheduled['relative']['value'] AS INT),
scheduled_relative_period = CAST(scheduled['relative']['period'] AS TEXT);

Answer 2

将

'relative->value'

替换为

'relative' ->> 'value'

同样适用于

period

。