如何根據同一表中另一列的幾何形狀將值插入一列

Question

我在下面張貼了數據庫表。 兩列geometryOfCellRepresentativeToTreatment和geometryOfCellRepresentativeToBuffer是幾何類型。 它們的值分別等於列fourCornersRepresentativeToTreatmentAsGeoJSON_和fourCornersRepresentativeToBufferAsGeoJSON的幾何形狀。 我如何將值作為前一列的幾何圖形插入后一列

表：

CREATE TABLE grid_cell_data (
           id SERIAL PRIMARY KEY,
           isTreatment boolean,
           isBuffer boolean,
           fourCornersRepresentativeToTreatmentAsGeoJSON text,
           fourCornersRepresentativeToBufferAsGeoJSON text,
           distanceFromCenterPointOfTreatmentToNearestEdge numeric,
           distanceFromCenterPointOfBufferToNearestEdge numeric,
           areasOfCoveragePerWindowForCellsRepresentativeToTreatment numeric,
           areasOfCoveragePerWindowForCellsRepresentativeToBuffer numeric,
           averageHeightsPerWindowRepresentativeToTreatment numeric,
           averageHeightsPerWindowRepresentativeToBuffer numeric,
           geometryOfCellRepresentativeToTreatment geometry,
           geometryOfCellRepresentativeToBuffer geometry)

data_to_be_inserted :

isTreatment = True//boolean
        isBuffer = False //boolean
        fourCornersRepresentativeToTreatmentAsGeoJSON_ = json.dumps(fourCornersOfKeyWindowAsGeoJSON[i])//string
        fourCornersRepresentativeToBufferAsGeoJSON_ = None//string
        distanceFromCenterPointOfTreatmentToNearestEdge_ = distancesFromCenterPointsToNearestEdge[i]
        distanceFromCenterPointOfBufferToNearestEdge_ = None
        areasOfCoveragePerWindowForCellsRepresentativeToTreatment_= areasOfCoveragePerWindow[i]
        areasOfCoveragePerWindowForCellsRepresentativeToBuffer_ = None
        averageHeightsPerWindowRepresentativeToTreatment_ = averageHeightsPerWindow[i]
        averageHeightsPerWindowRepresentativeToBuffer_ = None
        geometryOfCellRepresentativeToTreatment_ = //geometry of fourCornersRepresentativeToTreatmentAsGeoJSON_
        geometryOfCellRepresentativeToBuffer_ = //geometry of fourCornersRepresentativeToBufferAsGeoJSON_

Answer 1

只需在UPDATE語句中將geojson字符串設置為geometry列（為了更明確，將::字符串轉換為geometry ）：

UPDATE grid_cell_data SET
  geometryOfCellRepresentativeToTreatment = fourCornersRepresentativeToTreatmentAsGeoJSON::geometry,
  geometryOfCellRepresentativeToBuffer = fourCornersRepresentativeToBufferAsGeoJSON::geometry;

注意：您在同一個記錄中存儲了兩次相同的幾何圖形，這並不是真正必要的。 您應該這樣存儲幾何圖形，並且僅根據需要以您想要的格式序列化它們，例如 WKT、KML、GeoJSON 等。