Cassandra 错误代码 = 2200 [无效查询] 消息 =“物化视图 'op' 的主键中引用了未知列”

Question

我是 Cassandra 的新手，我正在尝试创建一个物化视图。 但它不起作用。 下面是表和物化视图定义以及错误代码-

桌子

CREATE TABLE my_keyspace.my_table (
    customerno text,
    operatorname text,
    customername text,
    operatorno text,
PRIMARY KEY (customerno));

物化视图

CREATE MATERIALIZED VIEW op
AS SELECT operatorname,operatorno 
FROM my_keyspace.my_table
WHERE operatorname IS NOT NULL AND customerno IS NOT NULL 
PRIMARY KEY (operatorname, customerno);

创建物化视图时出现错误消息

invalidrequest: error from server: code=2200 [invalid query] 
message="unknown column customerno referenced in primary key
for materialized view 'op'"

---

customerno是基表中的主键。

Answer 1

该错误表明customerno也需要位于基表的SELECT子句中。 这应该有效：

> CREATE MATERIALIZED VIEW op AS SELECT operatorname, operatorno, customerno
  FROM stackoverflow.customer_table 
  WHERE operatorname IS NOT NULL AND customerno IS NOT NULL
  PRIMARY KEY (operatorname, customerno);

Answer 2

要补充 Aaron 的答案，您似乎正在运行旧版本的 Cassandra。

在 3.0+ 和 3.11 的更高版本中，基表的所有主键列都会自动包含在内，因此您的CREATE语句应该可以正常工作。

例如，如果我在 C* 3.0.10 上运行它（在SELECT子句中没有customerno ）：

CREATE MATERIALIZED VIEW op
  AS SELECT operatorname,operatorno 
  FROM my_keyspace.my_table
  WHERE operatorname IS NOT NULL AND customerno IS NOT NULL 
  PRIMARY KEY (operatorname, customerno);

视图上的DESCRIBE返回：

cqlsh> DESCRIBE MATERIALIZED VIEW my_keyspace.op;

CREATE MATERIALIZED VIEW my_keyspace.op AS
    SELECT operatorname, customerno, operatorno
    FROM my_keyspace.my_table
    WHERE operatorname IS NOT NULL AND customerno IS NOT NULL
    PRIMARY KEY (operatorname, customerno)
    WITH CLUSTERING ORDER BY (customerno ASC)
    ...

自动包含customerno ：

    ...
    SELECT operatorname, customerno, operatorno
    ...

干杯!