luckyframework / luckyframework/avram
Distinct doesn't work when using upper
Nobody has claimed this yet.
- Dominant language
- Crystal
- Stars
- 183
- Forks
- 67
- PR merge metrics
- No merged PRs in 30d
Description
```crystal
# works
UserQuery.new
.preload_role
.where_groups(GroupQuery.new.id.in(groups.map &.id))
.email
.upper
.asc_order
# works
UserQuery.new
.preload_role
.where_groups(GroupQuery.new.id.in(groups.map &.id))
.email
.asc_order
.distinct
# doesn't work (for SELECT DISTINCT, ORDER BY expressions must appear in select list)
UserQuery.new
.preload_role
.where_groups(GroupQuery.new.id.in(groups.map &.id))
.email
.upper
.asc_order
.distinct
```
Contributor guide
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 with the UserQuery.new chain shown in the issue and run the three reproduction cases against PostgreSQL to compare the generated queries. Trace how .upper, .asc_order, and .distinct are combined; done means the final query executes without the SELECT DISTINCT/ORDER BY error while preserving the demonstrated ordering.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- crystal, postgresql
- Domain
- databases
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100