&&

📄字数 440

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功能描述

如果 A 的二维边界框与 B 的二维边界框交互，&&返回 TRUE。

语法格式

BOOLEAN &&( GEOMETRY A , GEOMETRY B );
BOOLEAN &&( GEOGRAPHY A , GEOGRAPHY B );

参数说明

• A：第一个目标 GEOMETRY/GEOGRAPHY 对象。
• B：第二个目标 GEOMETRY/GEOGRAPHY 对象。

函数返回类型

BOOLEAN 类型

使用说明

1. 该操作符将利用几何上可能可用的任何索引。
2. 该操作符支持圆形字符串和曲线。
3. 该操作符支持多面体曲面。

示例

SQL> SELECT tbl1.c1 AS t1_c1, tbl2.c1 AS t2_c1, tbl1.goem && tbl2.goem AS overlaps
     FROM (
     SELECT 1 AS c1, 'LINESTRING(0 0, 3 3)'::GEOMETRY AS goem UNION ALL
     SELECT 2 AS c1, 'LINESTRING(0 1, 0 5)'::GEOMETRY AS goem ) AS tbl1,
     (SELECT 3 AS c1, 'LINESTRING(1 2, 4 6)'::GEOMETRY AS goem) AS tbl2;

+-------+-------+----------+
| T1_C1 | T2_C1 | OVERLAPS |
+-------+-------+----------+
| 1     | 3     | T        |
| 2     | 3     | F        |
+-------+-------+----------+

(2 rows)