关于前缀索引字符串截断问题

[hungrytortoise]

Steps to reproduce the behavior (Required)

1、建表语句
CREATE TABLE short_key_test (
user_id string NOT NULL COMMENT "",
app varchar(65533) NOT NULL COMMENT "",
acct_no varchar(65533) NOT NULL COMMENT ""
)
ENGINE = OLAP
PRIMARY KEY(user_id,app,acct_no)
DISTRIBUTED BY HASH(acct_no)
order by (app,user_id).'

explain analyze select * from ads.short_key_test where app='ccc' and user_id='123';

Expected behavior (Required)

按照文档描述，创建前缀索引会被第一个字符串截断。所以生效的只有app的前缀索引

Real behavior (Required)

实际查看profile 前缀索引过滤掉了只剩一行记录，即user_id 也生效了

StarRocks version (Required)

-3.1.7

[hungrytortoise]

一共：1038808 记录；
profile中查看过滤掉 1038807