Cassandra数据存储大小写问题
cassandra是大小写不敏感(存储或显示),默认是把数据按小写存储或显示(包括keyspace name, table name, 字段名)
Queries that Work | Queries that Don't Work |
---|---|
SELECT foo FROM . . . | SELECT "Foo" FROM . . . |
SELECT Foo FROM . . . | SELECT "BAR" FROM . . . |
SELECT FOO FROM . . . | SELECT bar FROM . . . |
SELECT "Bar" FROM . . . | SELECT Bar FROM . . . |
SELECT "foo" FROM . . . | SELECT "bar" FROM . . . |
感觉其实就是把双引号一块存储了(不知道我有没有理解错)
另:
CQL的关键词是不区分大小写。
更详细请见:http://docs.datastax.com/en/cql/3.3/cql/cql_reference/ucase-lcase_r.html