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Commits on Jan 22, 2021

• Enhance the query planner to enable it to use an index for IS NOT NULL

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• Merge fixes from trunk. Omit a conditional in

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Commits on Jan 21, 2021

• Do not allow VACUUM to resize the page_size to 512 if the reserve_byte value

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• Performance optimizations in exprAnalyze()

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• Always enable the IS NOT NULL optimization, even if STAT4 is not enabled.

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• Fix a problem caused by using an SQL variable in an OVER clause within a trigger program.

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• Fix a problem caused by using an SQL variable in an OVER clause within a trigger program.

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Commits on Jan 20, 2021

• Improvements to the auxiliary "main.mk" makefile so that it works better with

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• Add tests for sqlite3session_memory_used() interface.

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Commits on Jan 18, 2021

• Fix harmless compiler warnings seen with MSVC.

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• Update test helper procedure 'get_pwd' to handle the ComSpec environment variable being absent.

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• Enhance the query planner so that it is able to code EXISTS operators in

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• More comments on the EXISTS-to-IN optimization logic.

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Commits on Jan 17, 2021

• Minor simplification of the EXISTS-to-IN logic.

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Commits on Jan 16, 2021

• Improved handling of vector equalities in the EXISTS-to-IN translator.

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• Give the EXISTS-to-IN optimization the ability to handle some cases that

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• Add debugging output about the EXISTS-to-IN optimization when

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• Fix a hyperlink in the Lemon documentation.

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Commits on Jan 15, 2021

• Add OOM injection tests for new code on this branch.

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• Update header comments for routines added by this branch.

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• Ensure the EXISTS->IN transformation preserves the collation sequence of the comparison operation.

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• Fix a potential NULL pointer dereference following OOM.

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• Add a new optimizer disabling bit to close off the exists-to-in optimization,

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• Small performance improvement in the EXISTS-to-IN translator for the

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• Merge the latest trunk enhancements into the exists-to-in branch.

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• Add simple tests (and a fix) for the change on this branch.

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Commits on Jan 14, 2021

• Improvements to the min/max optimization. Fix for a performance

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• Allow the planner to convert an EXISTS(SELECT...) expression in a WHERE clause to the equivalent IN(...) expression in situations where this is possible and advantageous.

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• The early-out of the inner loop on the min/max optimization was overly

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Commits on Jan 13, 2021

• Fix a harmless compiler warning.

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• Expand the number of optimization-disable bits from 16 to 32. Use one of

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• Further enhancements to the min/max optimization of

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• cli: Omit surplus whitespace at the end of lines in .explain output.

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• In the .selecttrace output, show the ORDER BY clause added by the Min/Max

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Commits on Jan 12, 2021

• Merge the ParseCleanup enhancement to trunk.

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