alamb commented on code in PR #244:
URL: https://github.com/apache/parquet-format/pull/244#discussion_r1608013416


##########
src/main/thrift/parquet.thrift:
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@@ -578,7 +578,13 @@ enum BoundaryOrder {
 
 /** Data page header */
 struct DataPageHeader {
-  /** Number of values, including NULLs, in this data page. **/
+  /**
+   * Number of values, including NULLs, in this data page.
+   *
+   * If a ColumnIndex is present, a page must begin at a record

Review Comment:
   That is an excellent question @mapleFU  -- given the discussion on 
https://github.com/apache/parquet-format/pull/245 I would prefer to refer to 
the definitions of ColumnIndex and OffsetIndex instead.
   
   So perhaps something like this 🤔 
   
   ```suggestion
      * If a ColumnIndex or OffsetIndex is present, a page must begin at a 
record
   ```
   



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