[coverage] Conformance findings: SESSION-017 #481

Summary

Surfaced by the multi-language coverage fan-out while conformance-testing these SPEC-IDs against databricks/databricks-sql-go. Each finding is committed as an expected-failure (xfail) test in the coverage PR — the test asserts the CORRECT (post-fix) behavior and stays red until THIS driver (databricks/databricks-sql-go) is fixed, then flips green as a tripwire.

Findings

• SESSION-017 [thrift]: A malformed enableTelemetry DSN value is fatal: ParseDSN rejects the entire DSN (strconv.ParseBool error) so the connection never opens, instead of leaving the telemetry overlay default untouched and diagnosing the typo
  • failing test: TestTelemetryEnablementPropertyIsHonoredAndOptional (see the coverage PR diff under tests/)

Reproduce & Expected

SESSION-017 — Validates the connect-time contract of the driver's telemetry-enablement connection property (reference ODBC key EnableTelemetry; map to the driver's own spelling for the SAME concept, e.g.

Reproduce:

SELECT 1 AS value
SELECT 1 AS value
SELECT 1 AS value
SELECT 1 AS value

Expected (per the shared spec):

• completes without an exception
• result has exactly 1 row(s)
• col 0 is named value
• completes without an exception
• result has exactly 1 row(s)
• completes without an exception
• result has exactly 1 row(s)
• completes without an exception
• result has exactly 1 row(s)
• full assertion contract:

result:
- label: opt_in
  no_exception: true
- label: opt_in
  row_count: 1
- label: opt_in
  column:
    index: 0
    name: value
- label: opt_in
  warning_diagnostic:
    mentions: EnableTelemetry
    present: false
- label: opt_out
  no_exception: true
- label: opt_out
  row_count: 1
- label: opt_out
  warning_diagnostic:
    mentions: EnableTelemetry
    present: false
- label: malformed
  no_exception: true
- label: malformed
  row_count: 1
- label: malformed
  warning_diagnostic:
    mentions: EnableTelemetry
    present: true
    sql_state: 01S02
- label: absent
  no_exception: true
- label: absent
  row_count: 1

Context

• The behavior was first fixed in a DIFFERENT driver — reference PR: https://github.com/databricks/databricks-odbc/pull/333 — which seeded the shared language-neutral spec. This issue tracks the same conformance gap in databricks/databricks-sql-go; the reference PR is for cross-referencing the intended behavior, NOT a change to this repo.
• Coverage PR carrying the reproducing xfail test(s): https://github.com/databricks/databricks-driver-test/pull/1641