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atdrendel
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This pull request fixes
SQLITE_BUSYerrors caused by the shift toIMMEDIATEtransactions.Updating the transaction type from the default
DEFERREDtoIMMEDIATEexposed some issues with the way SQLite wrapped GRDB. SQLite was wrapping some writes in an unnecessary transaction. This caused issues becauseIMMEDIATEtransactions immediately begin a write, meaning other writes will receive aSQLITE_BUSYerror. Before applying the changes in this pull request, vacuuming and checkpointing tests failed whenIMMEDIATEtransactions were used.