dolt 1.42.5

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Created by brew bump

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Created with brew bump-formula-pr.

release notes

# Merged PRs
dolt

8162: Better error message when attempting to push from a shallow clone

Push from a shallow clone is possible, but we should message better when it's not possible. In order to do this we need to error better from the Generational Chunk Store with a custom error.

Fixes: Unknown push Error When Pushing Large DB to Remote dolthub/dolt#8156
8158: fix no-op merge msg in cli

Fixes: Ghost Commit Error On Empty Merge dolthub/dolt#8148
8154: When removing from a secondary index during merging, use the pre-merge ordinal mapping, not the merged mapping, to identify the secondary key to be removed.

Basically, we have a bug where dropping a column on the remote side of a merge can interfere with updating secondary indexes.

Example:

Base Schema: (pk INT PRIMARY KEY, a TINYINT, b INT, UNIQUE KEY b_idx (b))

"theirs" drops column a

Merged Schema: (pk INT PRIMARY KEY, b INT, UNIQUE KEY b_idx (b))

In effect, the merger would see that in the final table, b is the second column. Then, when updating b_idx for each resolved row, it would use the second column of "ours" to find the index entry to remove. But this is incorrect, because the second column of "ours" is a.

If the user is lucky, these two columns will be different sizes and the merger will panic. But if the two columns are the same size, merge proceeds with an incorrect value. This will cause it to either fail to remove the old row from the secondary index, or remove a different row. Either way, the secondary index is now incorrect.
8150: fix warnings in dolt sql shell

This PR fixes a bug where warnings were incorrectly being suppressed in the dolt sql shell.

The bug is caused by the shell making queries to check if the working set is dirty, what database we're on, and what branch we're on. The fix is to set a special flag in the session to not clear the warnings for those specific queries.

companion pr: add lock to prevent warnings from being cleared dolthub/go-mysql-server#2605

fixes: dolt sql suppresses warnings. dolthub/dolt#8016
8124: [stats] limit stats boostrap to server start

fixes: stats refresh warning a little too zealous dolthub/dolt#8123

go-mysql-server

2606: [memo] assume self-join stats cardinality continuity

Self-join stats estimation is particularly expensive because all of the buckets exactly overlap. If the index is unique, the cardinality distribution will not change. If the index is non-unique, the cardinality will expand proportional to rowCount/distinctCount.
before
BenchmarkOltpJoinScan-12    	    1766	    694524 ns/op	  462834 B/op	    8240 allocs/op
after
BenchmarkOltpJoinScan-12    	    2460	    481166 ns/op	  193569 B/op	    7129 allocs/op

sysbench perf here: [no-release-notes] bump for self-join stats perf dolthub/dolt#8159
2605: add lock to prevent warnings from being cleared

This PR adds two functions to BaseSession that toggle a boolean, so integrators can prevent warnings from being cleared.

This is mostly useful for dolt sql shell.

addresses dolt sql suppresses warnings. dolthub/dolt#8016

Closed Issues

8123: stats refresh warning a little too zealous
8156: Unknown push Error When Pushing Large DB to Remote
8016: dolt sql suppresses warnings.
8148: Ghost Commit Error On Empty Merge
7638: Syntax Error Occurs When Using AS Clause with ON DUPLICATE KEY UPDATE

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