[COMPASS-2879] Count stage is not being evaluated properly after moving it in the pipeline Created: 26/May/18  Updated: 29/Oct/23  Resolved: 27/May/18

Status: Closed
Project: Compass
Component/s: Aggregation pipeline
Affects Version/s: 1.14.0-beta
Fix Version/s: 1.14.0, 1.15.0

Type: Bug Priority: Major - P3
Reporter: Grigori Melnik (Inactive) Assignee: Durran Jordan
Resolution: Fixed Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Sprint: Sprint Vanilla Ice

 Description   

It requires renaming the parameter to get it re-evaluated. Otherwise, it keeps showing "No Preview documents".

 

Repro steps:

  1. Create a simple pipeline
  2. Stage 1 : $match
  3. Stage 2: $count - any name as as paramater "", say "movies"

Both stages are properly evaluated and the count stage shows "movies":1065

4. Create new $match stage, $match {}

The stage appears after $count

5. Rearrange the stages for the $count to be the last stage again. Instead of showing 1065, it shows "No Preview documents".

If I go a rename "movies" in the $count stage to "films", it produces the expected result:

"films":1065


Generated at Wed Feb 07 22:31:24 UTC 2024 using Jira 9.7.1#970001-sha1:2222b88b221c4928ef0de3161136cc90c8356a66.