yangjun616 opened a new issue #4155:
URL: https://github.com/apache/incubator-doris/issues/4155
here is a table
`CREATE TABLE `table_v2` (
`date_partition` date NULL COMMENT "xxx",
`date_time` datetime NULL COMMENT "xx",
`is_some` int(11) NULL COMMENT "xxxx",
`uuid` hll HLL_UNION NULL COMMENT "xxxx",
INDEX xxx_index_date (`date_partition`) USING BITMAP COMMENT 'xx',
INDEX xxxx_is_some (`is_some`) USING BITMAP COMMENT 'xxx',
) ENGINE=OLAP
AGGREGATE KEY(`date_partition`, `date_time`, `is_some`)
COMMENT "OLAP-index"
PARTITION BY RANGE(`date_partition`)
(PARTITION p20200710 VALUES [('1970-01-01'), ('2020-07-10')))
PROPERTIES (
"replication_num" = "3",
"in_memory" = "false",
"storage_format" = "V2"
);`
when schema chage `alter table table_v2 modify column is_some TINYINT`
then `errCode = 2, detailMessage = Can not change INT to TINYINT`
but document
`
5) 目前支持以下类型的转换（精度损失由用户保证）
TINYINT/SMALLINT/INT/BIGINT 转换成
TINYINT/SMALLINT/INT/BIGINT/DOUBLE。
`
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