Feature request #6757
[Patch] Abort classification upon high number of classes
|Pull Request or Patch supplied:||No||Resolution:||fixed|
|Easy fix?:||No||Copied to github as #:||15913|
Accidentally classifying a vector layer (categorized style) on an id column (with >99k unique entries) resulted in high CPU load and QGIS frozen.
I suggest to present a warning dialog when more than 1000 unique values are present and ask the user whether to continue. Patch attached – please check for usage of correct terminology.