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https://issues.apache.org/jira/browse/HIVE-21118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16750636#comment-16750636
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Eugene Koifman commented on HIVE-21118:
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The current model in Acid subsystem is that there is 1 writeId per
(table,txnid). {{DbTxnManager.getTableWriteId()}} ensures this but perhaps it
should also be checked on {{TxnHandler}} side
There is also a concept of statement id, so that if there is > 1 write from a
single txn to the same table, each write creates a new delta with a different
statement id: delta_writeId_writeId_stmtId.
This is visible in multi-statement transactions (not fully supported yet but
there are some tests in TestTxnCommands) and multi-insert statement (especially
one that is generated to execute Merge statement)
> Make sure if dynamic partitions is true only there's only one writeId
> allocated
> -------------------------------------------------------------------------------
>
> Key: HIVE-21118
> URL: https://issues.apache.org/jira/browse/HIVE-21118
> Project: Hive
> Issue Type: Improvement
> Components: Transactions
> Reporter: Jaume M
> Assignee: Jaume M
> Priority: Critical
>
> See
> https://issues.apache.org/jira/browse/HIVE-21052?focusedCommentId=16740528&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16740528
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