Cassandra：无法使用非主键更新行（即使我创建了索引。）

Question

目前收到此错误消息：

错误请求：'UserGameAnswers'的WHERE子句中出现的预期键'KEY'

cqlsh:godofsports> UPDATE UserGameAnswers SET 'status' = 'thing' WHERE 'event_question_id' = '7';
Bad Request: Expected key 'KEY' to be present in WHERE clause for 'UserGameAnswers'

鉴于我有一个针对此列密钥的索引（见下文）和this should be allowed我做错了什么？

cqlsh:godofsports> DESCRIBE COLUMNFAMILY UserGameAnswers;

CREATE TABLE UserGameAnswers (
  KEY text PRIMARY KEY,
  event_question_id text
) WITH
  comment='' AND
  comparator=ascii AND
  read_repair_chance=0.100000 AND
  gc_grace_seconds=864000 AND
  default_validation=text AND
  min_compaction_threshold=4 AND
  max_compaction_threshold=32 AND
  replicate_on_write='true' AND
  compaction_strategy_class='SizeTieredCompactionStrategy' AND
  compression_parameters:sstable_compression='SnappyCompressor';

CREATE INDEX event_question_id_idx ON UserGameAnswers (event_question_id);

我是否需要先进行查询才能获取实际的KEY？ ：（

Answer 1

是 - 您需要确定密钥并根据该密钥编写更新。