sql - 将 key 获取到 postgres 中的 JSON 字段

Question

我在 Postgres 的 af 类型 jsonb 列中有这个 Json

{
    "coreTimes": {
        "TMP_CLINICAL_TIMES_ANESTHESIOLOGY_OUT_DATETIME": {
            "value": 1
        },
        "TMP_CLINICAL_TIMES_ANESTHESIOLOGY_IN_DATETIME": {
            "value": 2
        },
        "TMP_CLINICAL_TIMES_SURGICAL_OUT_DATETIME": {
            "value": 3
        },
        "TMP_CLINICAL_TIMES_ROOM_IN_DATETIME": {
            "value": 4
        },
        "TMP_CLINICAL_TIMES_ROOM_OUT_DATETIME": {
            "value": null
        },
        "TMP_CLINICAL_TIMES_BLOCK_OUT_DATETIME": {
            "value": null
        },
        "TMP_CLINICAL_TIMES_BLOCK_IN_DATETIME": {
            "value": null
        },
        "TMP_CLINICAL_TIMES_SURGICAL_IN_DATETIME": {
            "value": null
        }
    }
}

我需要这个结果:

Column
{"value":1}
{"value":2}
{"value":3}
{"value":4}
{"value":null}
{"value":null}
{"value":null}

如果 json 属性可以动态更改(键“coreTimes”是固定的)，我可以使用什么 postgres 函数来获取此结果？

在oracle中我已经解决了

 SELECT res.*
 FROM sopinterventionsaux   ,
      JSON_TABLE ( operating_times, '$.coreTimes.*'
           COLUMNS (
              value VARCHAR2 ( 2000 ) FORMAT JSON PATH '$'
                    )
                ) res

Answer 1

以下内容适用于 PostgreSQL 12 supports JSON path query

WITH T AS (SELECT $$
{
    "coreTimes": {
        "TMP_CLINICAL_TIMES_ANESTHESIOLOGY_OUT_DATETIME": {
            "value": 1
        },
        "TMP_CLINICAL_TIMES_ANESTHESIOLOGY_IN_DATETIME": {
            "value": 2
        },
        "TMP_CLINICAL_TIMES_SURGICAL_OUT_DATETIME": {
            "value": 3
        },
        "TMP_CLINICAL_TIMES_ROOM_IN_DATETIME": {
            "value": 4
        },
        "TMP_CLINICAL_TIMES_ROOM_OUT_DATETIME": {
            "value": null
        },
        "TMP_CLINICAL_TIMES_BLOCK_OUT_DATETIME": {
            "value": null
        },
        "TMP_CLINICAL_TIMES_BLOCK_IN_DATETIME": {
            "value": null
        },
        "TMP_CLINICAL_TIMES_SURGICAL_IN_DATETIME": {
            "value": null
        }
    }
}
$$::JSONB)
SELECT jsonb_path_query(jsonb, '$.coreTimes.*') FROM T;

 jsonb_path_query 
------------------
 {"value": 4}
 {"value": null}
 {"value": null}
 {"value": null}
 {"value": null}
 {"value": 3}
 {"value": 2}
 {"value": 1}
(8 rows)