datafusion/common: Add support for hashing ListView arrays #19814
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Jefffrey
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Jan 14, 2026
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| assert_eq!(hashes[0], hashes[5]); // same content [0, 1, 2] | ||
| assert_eq!(hashes[1], hashes[4]); // both null | ||
| assert_eq!(hashes[2], hashes[3]); // same content [3, null, 5] | ||
| assert_eq!(hashes[1], hashes[6]); // null vs empty list |
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Perhaps some negative tests to ensure hashes differ
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can you be more specific what you mean? are you just asking to test that eg. hash 0 and 2 are different?
martin-g
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Jan 15, 2026
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Which issue does this PR close?
Implements the hashing part of #19782
Rationale for this change
To aggregate by ListView arrays, we need to be able to hash them.
What changes are included in this PR?
The hashing code and tests.
Are these changes tested?
Yes, unit tests.
Are there any user-facing changes?
No, only additive functionality.
@alamb @Jefffrey