voonhous opened a new pull request, #9586:
URL: https://github.com/apache/hudi/pull/9586
### Change Logs
When Flink < 1.17 is used, `ITTestSchemaEvolution` will fail. This is so as
implicit inference of Map value's schema are used. The schema used will be the
row's last schema. This may cause unintended truncation (if last row is of
length that is shorter than the longest string's key value) or unintended
whitespace padding (if last row is of the longest map.key string length)
**An example is shown below of truncation:**
```sql
tEnv.executeSql("
select cast(f_map as map<string, int>)
from (values
( map['Indica', 111]) ),
( map['Danny', 111] ),
( map['Han', 111] ),
( map['Julian', 111] ),
( map['Fabian', 111] ),
( map['Sophia', 111] ),
( map['Emma', 111] ),
( map['Bob', 111] ),
( map['a', 111] )
)
as A(f_map)").print()
```
**An example is shown below of whitespace padding:**
```sql
tEnv.executeSql("
select cast(f_map as map<string, int>)
from (values
( map['Indica', 111]) ),
( map['Danny', 111] ),
( map['Han', 111] ),
( map['Julian', 111] ),
( map['Fabian', 111] ),
( map['Sophia', 111] ),
( map['Emma', 111] ),
( map['Bob', 111] ),
( map['Stephen', 111] )
)
as A(f_map)").print()
```
Detailed schema breakdown:
### Impact
Test in other versions should pass
### Risk level (write none, low medium or high below)
None
### Documentation Update
_Describe any necessary documentation update if there is any new feature,
config, or user-facing change_
- _The config description must be updated if new configs are added or the
default value of the configs are changed_
- _Any new feature or user-facing change requires updating the Hudi website.
Please create a Jira ticket, attach the
ticket number here and follow the
[instruction](https://hudi.apache.org/contribute/developer-setup#website) to
make
changes to the website._
### Contributor's checklist
- [X] 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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