justinmclean opened a new issue, #8034:
URL: https://github.com/apache/gravitino/issues/8034
### What would you like to be improved?
Improve api/src/main/java/org/apache/gravitino/rel/types/Types.java to fully
suport nallable simpleStrings.
Some test code:
```
Types.MapType mapTypeNotNull =
Types.MapType.valueNotNull(Types.IntegerType.get(),
Types.StringType.get());
Assertions.assertEquals(Type.Name.MAP, mapTypeNotNull.name());
Assertions.assertEquals(Types.IntegerType.get(),
mapTypeNotNull.keyType());
Assertions.assertEquals(Types.StringType.get(),
mapTypeNotNull.valueType());
Assertions.assertEquals("map<integer,string, NOT NULL>",
mapTypeNotNull.simpleString());
Assertions.assertEquals(
mapTypeNotNull,
Types.MapType.valueNotNull(Types.IntegerType.get(),
Types.StringType.get()));
```
### How should we improve?
Change the simpleString method so that the returned string reflects whether
the map’s values are nullable or not, appending NOT NULL when appropriate
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