描述

这个 &<| 运算符返回 TRUE 如果几何图形A的边界框与几何图形B的边界框重叠或在其下方，或者更准确地说，与几何图形B的边界框重叠或不在几何图形B的边界框之上。

This method supports Circular Strings and Curves

This function supports Polyhedral surfaces.

示例

SELECT tbl1.column1, tbl2.column1, tbl1.column2 &<| tbl2.column2 AS overbelow
FROM
  ( VALUES
        (1, 'LINESTRING(6 0, 6 4)'::geometry)) AS tbl1,
  ( VALUES
        (2, 'LINESTRING(0 0, 3 3)'::geometry),
        (3, 'LINESTRING(0 1, 0 5)'::geometry),
        (4, 'LINESTRING(1 2, 4 6)'::geometry)) AS tbl2;

 column1 | column1 | overbelow
---------+---------+-----------
           1 |       2 | f
           1 |       3 | t
           1 |       4 | t
(3 rows)

另请参阅

& & , | & > , & > , & <