... を使用してユニーク制約を作成します: ExclusionConstraint ( name = "exclude_overlapping_ops" , expressions = [ ( OpClass ( "circle" , name = "circle_ops" ), RangeOperators . OVERLAPS ), ], ) これは circle_ops を使用して circle 上に排他制約を作成します。 ... 連キーワード インデックス PostgreSQL None expressions ソース 整数 fillfactor options OpClass デフォルト値 調整 制約 pattern circle マイグレーションオペレーション fastupdate buffering username description 固有 contrib postgres BloomIndex length columns ク ... ... ます。 OpClass() 式は、制約式のカスタム operator class を指定するために使用できます。たとえば: expressions = [ ( OpClass ( "circle" , name = "circle_ops" ), RangeOperators . OVERLAPS ), ] これは circle_ops を使用して circle 上に排他制約を作成します。 in ... postgres None condition violation PostgreSQL モデル index type インデックス room cancelled deferrable GiST 演算子 timespan circle クイック検索 Last update: 2026年10月09日 « previous | up | next » ... ... ます。 OpClass() 式は、制約式のカスタム operator class を指定するために使用できます。たとえば: expressions = [ ( OpClass ( "circle" , name = "circle_ops" ), RangeOperators . OVERLAPS ), ] これは circle_ops を使用して circle 上に排他制約を作成します。 in ... ... を使用してユニーク制約を作成します: ExclusionConstraint ( name = "exclude_overlapping_ops" , expressions = [ ( OpClass ( "circle" , name = "circle_ops" ), RangeOperators . OVERLAPS ), ], ) これは circle_ops を使用して circle 上に排他制約を作成します。 ... ... face is a straight line, the shortest path between two points on a curved surface (such as the earth) is an arc of a great circle . [ 4 ] Thus, additional computation is required to obtain distances in planar units (e.g., kilometers and miles). Using a ... representation of its data. Distance and measurement operations performed on a geography column automatically employ great circle arc calculations and return linear units. In other words, when ST_Distance is called on two geographies, a value in meters ... ... face is a straight line, the shortest path between two points on a curved surface (such as the earth) is an arc of a great circle . [ 4 ] Thus, additional computation is required to obtain distances in planar units (e.g., kilometers and miles). Using a ... representation of its data. Distance and measurement operations performed on a geography column automatically employ great circle arc calculations and return linear units. In other words, when ST_Distance is called on two geographies, a value in meters ... 2026年10月08日