thswlsqls opened a new issue, #8535:
URL: https://github.com/apache/paimon/issues/8535
# [Bug] Internal map equality uses Java key lookup for binary keys
**Describe the bug**
`InternalRowUtils.equals` compares standalone `byte[]` values by content,
but its `InternalMap` branch checks keys with Java `Map.containsKey` and
`Map.get`.
For `MAP<BINARY, ...>`, two separate `byte[]` key objects with identical
bytes are therefore treated as different keys.
**To Reproduce**
Compare two `GenericMap` instances with `DataTypes.MAP(DataTypes.BINARY(2),
DataTypes.INT())`; each map contains one key `{1, 2}` and value `1`, but the
key arrays are different objects.
**Expected behavior**
The maps should compare equal because binary keys have the same logical
bytes and values match.
**Actual behavior**
The maps compare unequal because Java arrays use reference equality for map
lookup.
**Additional context**
The value comparison path already handles `byte[]` with `Arrays.equals`; map
key comparison should use the same typed equality path.
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