frolovdev commented on issue #1642:
URL: https://github.com/apache/arrow-rs/issues/1642#issuecomment-1158804062
@tustvold
So the basic idea is to avoid the obligation of values in the map. According
to
```
The value field encodes the map's value type and repetition. This field can
be required, optional, or omitted.
```
Did I get the idea right?
So it should be possible to parse something like this without any errors
```
message table {
required group map (MAP) {
repeated group key_value {
REQUIRED BYTE_ARRAY key;
}
}
}
```
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