zanmato1984 commented on code in PR #40998:
URL: https://github.com/apache/arrow/pull/40998#discussion_r1568981056
##########
cpp/src/arrow/compute/row/row_internal.cc:
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@@ -68,6 +68,10 @@ void RowTableMetadata::FromColumnMetadataVector(
// For the varying-length column, the fixed-length part is the 32-bit field
storing
// cumulative length of varying-length fields.
//
+ // The purpose of 'Sort Columns' here is construct an aligned friendly
condition
+ // for memory access. Resorted order will be used to produce an aligned
column_offset
+ // for access the row data in 'RowTableEncoder', 'RowTableImpl' and
'KeyCompare'.
Review Comment:
```suggestion
// cumulative length of varying-length fields. This is to make the memory
access of each individual column within the encoded row alignment-friendly.
```
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