Session-scoped data source lifecycle for R and Python - #310

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cpsievert wants to merge 25 commits into

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refactor/session-local-table-set

Commits on Sep 12, 2026

feat(py): add TableSet value object and build_query_executor()
cpsievert
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7eccd84
fix(py): SQLAlchemySource.cleanup() no longer disposes the caller's engine
cpsievert
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d9ccdfb
feat(r): add internal TableSet class and validate_source_group_compatibility()
cpsievert
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2240b6f
fix(r): DBISource/TblSqlSource cleanup() no longer disconnect the caller's connection
cpsievert
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9f712a7
fix: move TblSqlSource cleanup test to end of file per brief requirement
cpsievert
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d9fa920
refactor(py): give each Shiny session a read-only TableSet instead of mutating QueryChat
cpsievert
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5775b4b
refactor(r): give each Shiny session a read-only TableSet instead of mutating QueryChat
cpsievert
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3c53e8d
fix(r): don't close a caller-supplied DataSource when its session ends
cpsievert
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28a0e87
refactor(py): track one owned base client; session overrides close on session end
cpsievert
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f58f755
docs(r): describe session-scoped $server(data_source = ) and the cleanup ownership rule
cpsievert
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9ac54f6
docs(py): describe session-scoped server(data_source=) and the cleanup ownership rule
cpsievert
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84f580f

Commits on Sep 13, 2026