Postgres：如何更改JSON密钥的大小写？

Question

我的地址栏使用以下格式存储为JSON：

{ "Street1": "800 Smithe St", "Street2": null, "City": "Vancouver", "Region": null, "State": "BC", "Zip": "V6Z 2E1" }

如何将列值更改为驼峰大小写/小写，因此它们看起来像这样？

{ "street1": "800 Smithe St", "street2": null, "city": "Vancouver", "region": null, "state": "BC", "zip": "V6Z 2E1" }

Answer 1

with j(j) as ( values ($$
  {
    "Street1": "800 Smithe St",
    "Street2": null,
    "City": "Vancouver",
    "Region": null,
    "State": "BC",
    "Zip": "V6Z 2E1"
  }
$$::jsonb))
select json_object_agg(lower(key), value)
from j, jsonb_each(j) je
group by j;
                                                       json_object_agg                                                       
-----------------------------------------------------------------------------------------------------------------------------
 { "zip" : "V6Z 2E1", "city" : "Vancouver", "state" : "BC", "region" : null, "street1" : "800 Smithe St", "street2" : null }