Zouxxyy opened a new pull request, #9554:
URL: https://github.com/apache/hudi/pull/9554
…Format
### Change Logs
Currently, After doing schema evalution using spark-sql, query using hive
will fail
```sql
-- spark-sql
set hoodie.schema.on.read.enable=true;
create table hudi_mor_test_tbl (
id bigint,
name string,
ts int,
dt string,
hh string
) using hudi
tblproperties (
type = 'mor',
primaryKey = 'id',
preCombineField = 'ts'
)
partitioned by (dt, hh);
insert into hudi_mor_test_tbl values (1, 'a1', 1001, '2021-12-09', '10');
ALTER TABLE hudi_mor_test_tbl ALTER COLUMN ts TYPE bigint;
-- hive
select * from hudi_mor_test_tbl_rt;
Failed with exception java.io.IOException:java.lang.ClassCastException:
org.apache.hadoop.io.LongWritable cannot be cast to
org.apache.hadoop.io.IntWritable
```
The root cause is that `FileInputFormat` does not implement
`SelfDescribingInputFormatInterface`, see
```java
/**
* Marker interface to indicate a given input format is self-describing and
* can perform schema evolution itself.
*/
public interface SelfDescribingInputFormatInterface {
}
```
### Impact
After doing schema evalution using spark-sql, query using hive will success
### Risk level (write none, low medium or high below)
none
### Documentation Update
none
### Contributor's checklist
- [ ] Read through [contributor's
guide](https://hudi.apache.org/contribute/how-to-contribute)
- [ ] Change Logs and Impact were stated clearly
- [ ] Adequate tests were added if applicable
- [ ] CI passed
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