Github user liancheng commented on a diff in the pull request:
https://github.com/apache/spark/pull/6796#discussion_r33420628
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/parquet/CatalystSchemaConverter.scala
---
@@ -373,8 +374,10 @@ private[parquet] class CatalystSchemaConverter(
// Spark 1.4.x and prior versions only support decimals with a
maximum precision of 18 and
// always store decimals in fixed-length byte arrays.
+ // Always storing FIXED_LEN_BYTE_ARRAY is thus compatible with spark
<= 1.4.x, except for
+ // precisions > 18.
case DecimalType.Fixed(precision, scale)
- if precision <= maxPrecisionForBytes(8) &&
!followParquetFormatSpec =>
+ if !followParquetFormatSpec =>
--- End diff --
Nit: Let's join this line and the line above.
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