feat: ability to query table and column stats; fix: missing bookmarks for native batch-based sync #13
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aaronsteers
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edgarrmondragon
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Co-authored-by: Edgar R. M. <[email protected]>
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February 1, 2023 13:44
…s-not-record-a-max-replication-key-value-in-emitted-state
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@aaronsteers @kgpayne what needs to happen to get this merged? |
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@tayloramurphy final review from @edgarrmondragon would do it. @aaronsteers can't review his own PR, and I made a bunch of changes to get AJ's excellent first pass to fully work 🙂 Will add my review for the sake of GH ✅ |
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12-fix-batch-sync-does-not-record-a-max-replication-key-value-in-emitted-state
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I took an initial pass at this over the vacation. I don't know if I'll be able to finish it out, but we can at least start the discussions here.
Resolves:
BATCHsync does not record a max replication key value in emittedSTATE#12Besides the new "Table and Column Stats" implementation via
SQLConnector.get_table_profile(), the meat of the change is inSQLStream._sync_batches(). The proposed implementation queries for max column value before starting the batch unload, then after the load finishes, it increments the state with the pre-queried max value.Function signatures did not need to change, and all of this fix could be implemented into the SDK with no target-specific code needing to be written, except what is already done in this implementation, which is to use the bookmark's value (when it is available) in the WHERE clause of the COPY operation.