fix: handle loading of complex types into CometVector correctly in iceberg_compat scans #1279
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…eberg_compat scans
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The PR also replaces the use of ColumnDescriptor (again valid only for primitive types) with parquet.schema.Type in NativeBatchReader |
parthchandra
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Jan 14, 2025
| // release the previous dictionary vector and create a new one. | ||
| Dictionary arrowDictionary = importer.getProvider().lookup(dictionaryEncoding.getId()); | ||
| CometPlainVector dictionaryVector = | ||
| new CometPlainVector(arrowDictionary.getVector(), useDecimal128, isUuid); |
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This is valid only for primitive types
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| //// Create Column readers | ||
| List<ColumnDescriptor> columns = requestedSchema.getColumns(); | ||
| int numColumns = columns.size(); |
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This yields leaf fields which is not what we want.
| importer = new CometSchemaImporter(ALLOCATOR); | ||
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| List<ColumnDescriptor> columns = requestedSchema.getColumns(); | ||
| for (int i = 0; i < columns.size(); i++) { |
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This also operates on leaf fields which, again, is not what we want.
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NativeColumnReader was reading all types into a CometPlainVector which is correct only for primitive types. The PR updates the code to use NativeUtil and follow the same logic as CometExecIterator.
This addresses 12 unit test failures involving ColumnarShuffle on struct types.