sdachen opened a new issue, #36279: URL: https://github.com/apache/arrow/issues/36279
### Describe the bug, including details regarding any error messages, version, and platform. In the [documentation](https://arrow.apache.org/docs/format/Columnar.html), the DenseUnion example has 4 elements, 2 float, 1 null, and 1 integer. In the `types` buffer, the null element is indicated as a float. In the float child array, there are 3 elements, 1.2, null, and 3.4, but the `Length` property says 2. Should it be 3 instead given the value buffer contains 12 bytes? * Length: 4, Null count: 0 * Types buffer: |Byte 0 | Byte 1 | Byte 2 | Byte 3 | Bytes 4-63 | |---------|-------------|----------|----------|-------------| | 0 | 0 | 0 | 1 | unspecified | * Offset buffer: |Bytes 0-3 | Bytes 4-7 | Bytes 8-11 | Bytes 12-15 | Bytes 16-63 | |----------|-------------|------------|-------------|-------------| | 0 | 1 | 2 | 0 | unspecified | * Children arrays: * Field-0 array (f: Float32): * Length: 2, Null count: 1 * Validity bitmap buffer: 00000101 * Value Buffer: | Bytes 0-11 | Bytes 12-63 | |----------------|-------------| | 1.2, null, 3.4 | unspecified | * Field-1 array (i: Int32): * Length: 1, Null count: 0 * Validity bitmap buffer: Not required * Value Buffer: | Bytes 0-3 | Bytes 4-63 | |-----------|-------------| | 5 | unspecified | ### Component(s) Documentation -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
