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fix(iceberg): fix iceberg engine table time travel #19747

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merged 2 commits into from
Dec 11, 2024

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chenzl25
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@chenzl25 chenzl25 commented Dec 10, 2024

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What's changed and what's your intention?

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@chenzl25 chenzl25 requested review from xxhZs and zwang28 December 10, 2024 12:19
@github-actions github-actions bot added the type/fix Bug fix label Dec 10, 2024
@graphite-app graphite-app bot requested a review from a team December 10, 2024 13:20
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stdrc commented Dec 10, 2024

  • Iceberg supports different time travel syntax from hummock table.

So is it changed to have the same syntax or not?

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  • Iceberg supports different time travel syntax from hummock table.

So is it changed to have the same syntax or not?

They don't share the same syntax. For example, hummock table time travel doesn't support FOR SYSTEM_VERSION AS OF 123456 while iceberg table doesn't support FOR SYSTEM_TIME AS OF PROCTIME()

@@ -15,6 +15,11 @@ select * from t;
----
1 xxx

query ??
select * from t for system_time as of '2222-12-10 11:48:06';
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Does '2222-12-10 11:48:06' correspond to 7982020086000 or 7981991286000?

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@chenzl25 chenzl25 Dec 11, 2024

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I look at the implementation, currently all timestamp string in iceberg time travel (as well as hummock time travel) without explicit timezone will be considered to be UTC and don't respect the session timezone.

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Let's fix the current issue first and I will open another issue to track the timezone issue.

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@chenzl25 chenzl25 added this pull request to the merge queue Dec 11, 2024
Merged via the queue into main with commit f945379 Dec 11, 2024
30 of 31 checks passed
@chenzl25 chenzl25 deleted the dylan/fix_iceberg_engine_table_time_travel branch December 11, 2024 07:54
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4 participants