[DRILL-4457] Difference in results returned by window function over BIGINT data

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.6.0
• Fix Version/s: 1.6.0
• Component/s: Execution - Flow
• Labels: window_function

Environment

4 node cluster

• Assignee: Abdel Hakim Deneche
• Reporter: Khurram Faraaz
• Reviewer: Khurram Faraaz
• Created: 01/Mar/16 10:58
• Updated: 12/Apr/16 18:30
• Resolved: 07/Mar/16 19:03

Description

Difference in results returned by window function query over same data on Drill vs on Postgres.
Drill 1.6.0 commit ID 6d5f4983

Verification Failures:
/root/public_framework/drill-test-framework/framework/resources/Functional/window_functions/frameclause/RBCRACR/RBCRACR_bgint_6.q
Query:
SELECT FIRST_VALUE(c3) OVER(PARTITION BY c8 ORDER BY c1 RANGE BETWEEN CURRENT ROW AND CURRENT ROW) FROM `t_alltype.parquet`
         Expected number of rows: 145
Actual number of rows from Drill: 145
         Number of matching rows: 143
          Number of rows missing: 2
       Number of rows unexpected: 2

These rows are not expected (first 10):
36022570792
21011901540311080

These rows are missing (first 10):
null (2 time(s))

Here is the difference in results, Drill 1.6.0 returns 36022570792 whereas Postgres returns null, and another difference is that Drill returns 21011901540311080 whereas Postgres returns null.

[root@centos-01 drill-output]# diff -cb RBCRACR_RBCRACR_bgint_6.output_Tue_Mar_01_10\:36\:42_UTC_2016 ../resources/Functional/window_functions/frameclause/RBCRACR/RBCRACR_bgint_6.e
*** RBCRACR_RBCRACR_bgint_6.output_Tue_Mar_01_10:36:42_UTC_2016	2016-03-01 10:36:43.012382649 +0000
--- ../resources/Functional/window_functions/frameclause/RBCRACR/RBCRACR_bgint_6.e	2016-03-01 10:32:56.605677914 +0000
***************
*** 55,61 ****
  5424751352
  3734160392
  36022570792
! 36022570792
  584831936
  37102817894137256
  61958708627376736
--- 55,61 ----
  5424751352
  3734160392
  36022570792
! null
  584831936
  37102817894137256
  61958708627376736
***************
*** 64,70 ****
  29537626363643852
  52598911986023288
  21011901540311080
! 21011901540311080
  17990322900862228
  616080519999272
  3136812789494
--- 64,70 ----
  29537626363643852
  52598911986023288
  21011901540311080
! null
  17990322900862228
  616080519999272
  3136812789494