Github user liancheng commented on a diff in the pull request:
https://github.com/apache/spark/pull/6796#discussion_r33420649
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/parquet/CatalystSchemaConverter.scala
---
@@ -404,9 +401,10 @@ private[parquet] class CatalystSchemaConverter(
.scale(scale)
.named(field.name)
- // Uses INT64 for 1 <= precision <= 18
+ // Uses INT64 for 8 byte encodings / precision <= 18
case DecimalType.Fixed(precision, scale)
- if precision <= maxPrecisionForBytes(8) && followParquetFormatSpec
=>
+ if followParquetFormatSpec && maxPrecisionForBytes(7) < precision
&&
+ precision <= maxPrecisionForBytes(8) =>
--- End diff --
Same question as above...
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