Feature request #9546
Expression Contexts
| Status: | Closed | ||
|---|---|---|---|
| Priority: | Normal | ||
| Assignee: | - | ||
| Category: | - | ||
| Pull Request or Patch supplied: | No | Resolution: | |
| Easy fix?: | No | Copied to github as #: | 18133 |
Description
There is an increasing number of additional features in expression engine that make sense only in particular context. These features are available either directly in QgsExpression API (e.g. $rownum, $scale) or through "special columns" (e.g. $map, $page, ...). Additionally, with special columns, their value is shared between all QgsExpression instances, which may eventually lead to problems with concurrency (especially with multi-threading).
More thoughts:
https://www.mail-archive.com/[email protected]/msg19488.html
Related issues
History
#1
Updated by Nathan Woodrow about 9 years ago
- Status changed from Open to Closed
Already done thanks to Nyall