[DRILL-4045] FLATTEN case in testNestedFlatten yields no rows (test didn't detect)

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Execution - Relational Operators
• Assignee: Unassigned
• Reporter: Daniel Barclay
• Created: 06/Nov/15 02:40
• Updated: 06/Nov/15 02:48

Description

The case of using FLATTEN on nested lists appearing in TestComplexTypeReader.testNestedFlatten() yields no rows.

Part of the problem is that in the code generated by FlattenRecordBatch, the methods are empty.

(That test method doesn't check the results, so, previous to DRILL-2288 work, the problem was not detected.

However, with DRILL-2288 fixes, the flatten problem causes an IllegalArgumentException (logically, an assertion exception) in RecordBatchLoader, so the test is being disabled (with @Ignore) as part of DRILL-2288.)

Issue Links

• relates to: DRILL-2288 ScanBatch violates IterOutcome protocol for zero-row sources [was: missing JDBC metadata (schema) for 0-row results...]