[SPARK-56619][CONNECT][TESTS] Add DSv2 repeated table access tests with internal/external changes in Spark Connect-clone#55573
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Adds 6 tests to verify that repeated sql() calls in Spark Connect mode always see the latest table state. This mirrors the classic-mode tests added to DataSourceV2DataFrameSuite, covering: 1. Session write: INSERT via SQL, next SELECT sees new row 2. External write: data added via catalog API, next SELECT sees it 3. Session schema change: ADD COLUMN via SQL, next SELECT sees new schema 4. External schema change: column added via catalog API, next SELECT sees it 5. Session drop/recreate: DROP+CREATE via SQL, next SELECT sees empty table 6. External drop/recreate: drop+create via catalog API, next SELECT sees empty In Connect, every sql() call creates a fresh plan re-analyzed on the server, so all modifications are always visible. Co-authored-by: Isaac
Co-authored-by: Isaac
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What changes were proposed in this pull request?
Add 6 tests in a new
DataSourceV2RepeatedSQLConnectSuitethat verify DSv2 tables reflect the latest state when accessed repeatedly viasql()in Spark Connect mode (without CACHE TABLE). Eachsql("SELECT * FROM t")call creates a fresh plan that is re-analyzed on the server, so it always sees the most recent data, schema, and table identity.The tests use an in-process Connect server (
SparkConnectServerTest) and cover three scenarios, each with a session-write and an external-write variant:sql()query sees the new data.sql()query reflects the updated schema.sql()query sees the empty recreated table.External writes use
getServerSession()to access the server-side catalog API (loadTablewith write privileges,alterTable,dropTable/createTable), matching the pattern used by the classic-mode tests in #55462.Why are the changes needed?
These tests document and lock down the expected behavior: repeated
sql()access in Connect mode always sees the latest table state. This prevents regressions if internal resolution or caching logic changes. This is the Connect companion to the classic-mode tests in #55462.Does this PR introduce any user-facing change?
No. This PR is test-only.
How was this patch tested?
6 new tests in
DataSourceV2RepeatedSQLConnectSuite, all passing:Was this patch authored or co-authored using generative AI tooling?
Generated-by: Claude Code (claude-opus-4-6)