使用预先指定的 json Postgresql 在 Table 中插入数据

Question

我有一个 geojson 预先指定为 PostgreSQL pgAdmin4 查询中的数据 tool.I 我正在尝试将数据插入 table 但由于我的 JSON 很大所以而不是手动执行 Insert into 我这样做：

WITH data AS (SELECT '{ "type": "FeatureCollection",
"features": [
  { "type": "Feature",
    "geometry": {"type": "Point", "coordinates": [102.0, 0.5]},
    "properties": {"prop0": "value0"}
    },
  { "type": "Feature",
    "geometry": {
      "type": "LineString",
      "coordinates": [
        [102.0, 0.0], [103.0, 1.0], [104.0, 0.0], [105.0, 1.0]
        ]
      },
    "properties": {
      "prop0": "value0",
      "prop1": 0.0
      }
    }
   ]
 }'::json AS fc)

现在尝试像这样将此数据插入 table：

INSERT INTO locations (gid, geom, properties) VALUES ( data );

它给我一个错误 column data doesn't exist。但是当我这样做时：

SELECT
row_number() OVER () AS gid,
ST_AsText(ST_GeomFromGeoJSON(feat->>'geometry')) AS geom,
feat->'properties' AS properties
FROM (
 SELECT json_array_elements(fc->'features') AS feat
FROM data
 ) AS f;

此查询显示数据。我的问题是，当我想要时，我可以 select 并查看数据，但由于这不是存储在任何地方所以每次我需要做 WITH data as 声明 json 并应用 select 查询.所以我想在我的 table 中插入值，这样我就可以随时调用它。

Answer 1

您应该可以直接使用 SELECT 代替 VALUES 语句，如下所示：

WITH data AS (SELECT '{ "type": "FeatureCollection",
"features": [
  { "type": "Feature",
    "geometry": {"type": "Point", "coordinates": [102.0, 0.5]},
    "properties": {"prop0": "value0"}
    },
  { "type": "Feature",
    "geometry": {
      "type": "LineString",
      "coordinates": [
        [102.0, 0.0], [103.0, 1.0], [104.0, 0.0], [105.0, 1.0]
        ]
      },
    "properties": {
      "prop0": "value0",
      "prop1": 0.0
      }
    }
   ]
 }'::json AS fc)
INSERT INTO locations (gid, geom, properties)
SELECT
row_number() OVER () AS gid,
ST_AsText(ST_GeomFromGeoJSON(feat->>'geometry')) AS geom,
feat->'properties' AS properties
FROM (
 SELECT json_array_elements(fc->'features') AS feat
FROM data
 ) AS f;

使用预先指定的 json Postgresql 在 Table 中插入数据

Insert data in Table using a pre-specified json Postgresql

postgresql

json

geojson