标签: match-recognize

以下查询在Oracle 12c中是正确的:

SELECT *
FROM dual
MATCH_RECOGNIZE (
  MEASURES a.dummy AS dummy
  PATTERN (a?)
  DEFINE a AS (1 = 1)
)

但它不能通过JDBC工作,因为?用作正则表达式字符的字符,而不是绑定变量.

什么是逃避?通过JDBC 的正确方法,假设我想将其作为PreparedStatement绑定变量运行？

注意:

• 我发现有关JDBC规范讨论邮件列表的讨论,但是这个问题没有结论:http://mail.openjdk.java.net/pipermail/jdbc-spec-discuss/2013-October/000066.html
• PostgreSQL与JSON运算符有类似的问题:如何使用包含问号"？"的PostgreSQL JSON(B)运算符.通过JDBC

MATCH_RECOGNIZE我在带有一些 CTE 的查询中使用函数。当我运行查询时，出现以下错误：

SQL 编译错误：在此上下文中不支持 MATCH_RECOGNIZE。

在我的查询中，MATCH_RECOGNIZE 之前和之后有几个 CTE，部分如下。

WITH cte1 AS (
SELECT *
FROM dataset
WHERE ID IS NOT NULL AND STATUS IS NOT NULL ),

cte2 AS (
SELECT *
FROM cte1
QUALIFY FIRST_VALUE(STATUS) OVER (PARTITION BY ID ORDER BY CREATED_AT) = 'created' )

mr as (
SELECT *
    FROM cte2
    MATCH_RECOGNIZE (
      PARTITION BY ID
      ORDER BY CREATED_AT
      MEASURES MATCH_NUMBER() AS mn,
               MATCH_SEQUENCE_NUMBER AS msn
      ALL ROWS PER MATCH
      PATTERN (c+m+)
      DEFINE
         c AS status='created' …