fix: Handle negative block counts in Avro map/header parsing#6
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pomo-mondreganto wants to merge 1 commit intoDataEngineeringLabs:mainfrom
Open
fix: Handle negative block counts in Avro map/header parsing#6pomo-mondreganto wants to merge 1 commit intoDataEngineeringLabs:mainfrom
pomo-mondreganto wants to merge 1 commit intoDataEngineeringLabs:mainfrom
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Per the Avro specification, when reading maps (and arrays), a negative block count indicates that the absolute value should be used as the count, and a byte size follows for fast skipping. Previously, the code cast the signed zigzag value directly to usize, causing a negative value like -8 to become 18,446,744,073,709,551,608 on 64-bit systems, triggering a hash table capacity overflow panic. Also skips parsing of 'default' field values since the current implementation incorrectly expects them to be Schema types rather than actual default values. Fixes reading of Apache Iceberg manifest files which use this encoding.
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Per the Avro specification, when reading maps (and arrays), a negative block count indicates that the absolute value should be used as the count, and a byte size follows for fast skipping.
Previously, the code cast the signed zigzag value directly to usize, causing a negative value like -8 to become 18,446,744,073,709,551,608 on 64-bit systems, triggering a hash table capacity overflow panic.
Also skips parsing of 'default' field values since the current implementation incorrectly expects them to be Schema types rather than actual default values.
Fixes reading of Apache Iceberg manifest files which use this encoding.