cqframework / cqframework/cql-execution
subtraction of exact CQL Quantities
Nobody has claimed this yet.
- Dominant language
- JavaScript
- Stars
- 84
- Forks
- 38
- Avg merge
- 1d 20h
- Merged PRs (30d)
- 1
Description
Using cql-execution v3.3.0 from 8/2025, subtraction of exact CQL Quantities 1.4 'mg/dL' - 0.3 'mg/dL' evaluated to 1.0999999999999999 'mg/dL', causing a subsequent comparison with 1.1 'mg/dL' to fail. Notably, this works as expected in the CQF CQL Extension.
Perhaps this is related to Issue 280 'Improve support for CQL Decimal' from 10/2022 (i.e. "Initial precision is not maintained in all cases")?
Contributor guide
No contributing guide indexed for this repository
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the 1.4 'mg/dL' - 0.3 'mg/dL' expression in cql-execution v3.3.0 and compare it with the CQF CQL Extension result. Read Issue 280, “Improve support for CQL Decimal,” for related precision context. Done means subtraction produces the expected exact quantity and the subsequent comparison with 1.1 'mg/dL' succeeds.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- javascript
- Domain
- backend
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100