Jorge Leitão created ARROW-12118:
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Summary: [C++] Primitive types have defined num_children
Key: ARROW-12118
URL: https://issues.apache.org/jira/browse/ARROW-12118
Project: Apache Arrow
Issue Type: Bug
Components: C++
Reporter: Jorge Leitão
The spec states that `num_children` [should not be defined in primitive
types.|https://github.com/apache/parquet-format/blob/7f06e838cbd1b7dbd722ff2580b9c2525e37fc46/src/main/thrift/parquet.thrift#L373]
However, we are sometimes writing 0 children on it.
Found while going through the rust code:
[https://github.com/apache/arrow/blob/5be69789eeac0f2c357cfcd0d329c518848adebc/rust/parquet/src/schema/types.rs#L2030]
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