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https://issues.apache.org/jira/browse/PARQUET-2261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17706122#comment-17706122
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ASF GitHub Bot commented on PARQUET-2261:
-----------------------------------------
yqiu2 commented on code in PR #197:
URL: https://github.com/apache/parquet-format/pull/197#discussion_r1151068954
##########
src/main/thrift/parquet.thrift:
##########
@@ -190,6 +190,45 @@ enum FieldRepetitionType {
/** The field is repeated and can contain 0 or more values */
REPEATED = 2;
}
+/**
+ * A structure for capturing metadata for estimating the unencoded,
uncompressed size
+ * of data.
+ *
+ * Writers should populate all fields in this struct except for the exceptions
listed per field.
+ */
+struct SizeEstimationStatistics {
+ /**
+ * The number of logical physical bytes stored for BYTE_ARRAY data values.
Logical bytes refers to the number
+ * of bytes needed if no special encoding is used. This is exclusive of the
bytes needed
+ * to store the length of each byte array. In other words, this field is
equivelant to the the (size of
+ * PLAIN-ENCODING the byte array values) - (4 bytes * number of values
written). To determine logical sizes
Review Comment:
4 bytes * number of values written
is that the logical size of the data? Is this assuming that each value takes
4 bytes of space?
> [Format] Add statistics that reflect decoded size to metadata
> -------------------------------------------------------------
>
> Key: PARQUET-2261
> URL: https://issues.apache.org/jira/browse/PARQUET-2261
> Project: Parquet
> Issue Type: Improvement
> Components: parquet-format
> Reporter: Micah Kornfield
> Assignee: Micah Kornfield
> Priority: Major
>
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