Oracle Performance领先的通配符搜索

Question

我有一个select语句，它使用通配符搜索与其他表连接，这个语句的表现很荒谬

Oralce有没有办法使用带有LIKE'％string％'子句的索引？

SQL

WITH x AS
        (SELECT /*+ PARALLEL(a 8)  PARALLEL(b 8) ORDERED */
               a.location AS a_name, UPPER (b.name) b_name
           FROM table_a a LEFT OUTER JOIN table_b b ON b.name LIKE (LOWER ('%' || a.name) || '%')
         ORDER BY a_name,  b_name)
SELECT DISTINCT a_name, b_name
  FROM x;

Answer 1

尝试使用Oracle全文索引。