deduplicate variadic buffers in MutableArrayData::extend for ByteView arrays #6808
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alamb
reviewed
Nov 27, 2024
| _ => vec![], | ||
| let (variadic_data_buffers, buffer_to_idx) = match &data_type { | ||
| DataType::BinaryView | DataType::Utf8View => { | ||
| let mut buffer_to_idx = HashMap::new(); |
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I wonder if building a hashmap / vec would be overly expensive (though we would need to run benchmarks to be sure)
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Which issue does this PR close?
Closes #.
Rationale for this change
MutableArrayData adds all variadic buffers from input arrays together, potentially duplicating the same buffers in the output array.
What changes are included in this PR?
extendnow checks if the same buffer is added from some other input array and changes the views to be appended to point to the new deduplicated buffer indicesAre there any user-facing changes?