Merged PRs

dolt

• 4886: dolt_conflicts_$tbl_name: updates to the our version persist
  Any columns prefixed with our_ can now be updated on the dolt_conflicts_$tbl_name tables. Updates on the our columns get translated to updates on the conflict source table.
  First pass on implementing the suggestion in #4854. Handles keyless and keyed tables. Does not add the auto-incrementing id to the conflict table. Will get this out to the customer first and then come back.
• 4882: add send email action to failed ORM integration tests
  When nightly ORM integration test fails, it sends email to me and Tim.
• 4878: go/store/nbs: chunkJournal, journalWriter, and journalChunkSource
  Adds chunkJournal, a log-based ChunkStore that integrates into current NomsBlockStore machinery. chunkJournal implements tablePersister and manifest. When memtables are passed to Persist(), their contents appended to the journal file at current offset and a journalChunkSource (implementing chunkSource) is returned. journalChunkSource is an in-memory object containing offset metadata for reading back chunks from the journal file. The chunkJournal also persists root hash updates to the log via the manifest interface. This PR is adapted from #4803, instead of returning a unique journalChunkSource on each Persist() call, a single chunk source is returned repeatedly. The tableSet naturally deduplicates these chunkSource references by storing them in a chunkSourceSet (#4860).
  This implementation is currently behind a feature flag. Lots of work remains to fully support current NBS functionality.
  • Push/Pull/Clone paths are largely unsupported.
  • chunkJournal is limited to a fixed size, doesn't have support for finalizing the current journal as a table file
  • Current chunk record format is temporary and needs support for format extension

go-mysql-server

• 1433: Fix nested subquery join index in subquery expression w/ outer scope visibility
  The plan representation and exec scope passing diverged for subqueries. We were indexing assuming no scope passing, but at runtime still prepending scope rows, which indirectly snuck around not explicitly passing scope through the subquery alias.
• 1430: fix declaration so the compiler checks it properly
• 1425: tests for non-unique indexes over keyless tables
  Non-unique indexes work as expected for in-memory tables, but there were no tests.
  companion pr: #4873
  tests for: #4861

vitess

• 203: Added OPEN, CLOSE, FETCH
  These are needed for CURSOR support.
• 202: support explaining tables, and adding extended keyword
  Even though it is deprecated, we can support EXPLAIN EXTENDED, since it does the same thing as normal EXPLAIN
  https://dev.mysql.com/doc/refman/5.7/en/explain.html#:~:text=In%20older%20MySQL%20releases%2C%20extended%20information%20was%20produced%20using%20EXPLAIN%20EXTENDED.
  Additionally, EXPLAIN, DESCRIBE, and DESC are all interchangable, so we should be able to EXPLAIN tbl
  Fix for: #4185

Closed Issues

• 4864: Incorrect capitalization of sql-server param in docs
• 4865: Error while restoring mysql dump into dolt
• 4862: dolt migrate drops secondary indexes, checks, and collations when there's a string column

Latency