Tishj commented on code in PR #520: URL: https://github.com/apache/parquet-format/pull/520#discussion_r2336428309
########## VariantShredding.md: ########## @@ -42,7 +42,31 @@ Variant values are stored in Parquet fields named `value`. Each `value` field may have an associated shredded field named `typed_value` that stores the value when it matches a specific type. When `typed_value` is present, readers **must** reconstruct shredded values according to this specification. -For example, a Variant field, `measurement` may be shredded as long values by adding `typed_value` with type `int64`: +The Parquet columns used to store variant metadata and values must be accessed by name, not by position. + +In order to avoid ambiguity, this specification always uses the term "`null`" to mean the variant +null value (binary encoding: `00`). The phrase "missing" or "NULL" (all caps) always refers to an +`optional` value that is not present (= SQL NULL). Review Comment: I think the last option is preferable, the spec is meant to be clear, not concise, wordy over ambiguous is always better in my opinion. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
