[IMPALA-8742] ScannerContext::eosr() should depends on scan_range->bytes_to_read() instead of scan_range->len()

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: Impala 3.2.0
• Fix Version/s: Impala 3.4.0
• Component/s: Backend
• Epic Color: ghx-label-4
• Assignee: Zoltán Borók-Nagy
• Reporter: Chen Wang
• Created: 06/Jul/19 16:35
• Updated: 31/Oct/19 00:43
• Resolved: 18/Oct/19 15:36

Description

Normally, scan_range->len() equals to scan_range->bytes_to_read().

But when SubRanges exists, only bytes_to_read was updated, ScannerContext::GetBuffer would read entire scan_range->len() bytes, and I think it would be a bug.

Issue Links

• breaks: IMPALA-9091 query_test.test_scanners.TestScannerReservation.test_scanners flaky