[GitHub] [iceberg-docs] rdblue edited a comment on pull request #19: Adds graphic for time-travel section of splash page

[GitBox <gi...@apache.org>]

rdblue edited a comment on pull request #19:
URL: https://github.com/apache/iceberg-docs/pull/19#issuecomment-1022430192


   I have the same reaction as @RussellSpitzer. I like the visualization of snapshots, but I don't consider rollback to be time travel. Rollback alters the state of the table, while time travel actually reads older versions.
   
   The trouble here is that there isn't a good SQL demonstration of time travel yet. We've added table names for time travel in 3.2, but we're waiting for Spark 3.3 to get the `AS OF TIMESTAMP` and `AS OF VERSION` syntax. Maybe we should use those anyway? Or maybe we should use Spark's dataframe syntax to demo time travel right now:
   
   ```scala
   spark.read.option("as-of-timestamp", System.currentTimeMillis() - ONE_DAY_MS).load("db.table)
   ```


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