rdblue commented on code in PR #3397:
URL: https://github.com/apache/parquet-java/pull/3397#discussion_r4098752199
##########
parquet-column/src/main/java/org/apache/parquet/column/Encoding.java:
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@@ -147,6 +149,26 @@ public ValuesReader getValuesReader(ColumnDescriptor
descriptor, ValuesType valu
}
},
+ /**
+ * ALP (Adaptive Lossless floating-Point) encoding for FLOAT and DOUBLE
types.
+ * Works by converting floating-point values to integers using decimal
scaling,
+ * then applying Frame of Reference (FOR) encoding and bit-packing.
Review Comment:
This isn't the right place to document how ALP works. This is probably a
generated comment that can/should be removed.
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