greggailly commented on code in PR #42483:
URL: https://github.com/apache/superset/pull/42483#discussion_r3659429526
##########
superset-frontend/src/explore/components/controls/DndColumnSelectControl/DndMetricSelect.tsx:
##########
@@ -46,7 +46,35 @@ import { AGGREGATES } from 'src/explore/constants';
import { datasetLabelLower } from 'src/features/semanticLayers/label';
const EMPTY_OBJECT = {};
-const DND_ACCEPTED_TYPES = [DndItemType.Column, DndItemType.Metric];
+const DND_ACCEPTED_TYPES = [
+ DndItemType.Column,
+ DndItemType.Metric,
+ DndItemType.Folder,
+];
+
+/**
+ * Build an adhoc metric from a dropped column, picking a sensible default
+ * aggregation from the column's data type: SUM for numeric columns,
+ * COUNT_DISTINCT for string/boolean/temporal ones.
+ */
+export const createAdhocMetricFromColumn = (
+ column: ColumnMeta,
+): AdhocMetric => {
+ // Cast config to handle ColumnMeta/ColumnType mismatch
+ const config = {
+ column,
+ } as Partial<AdhocMetric>;
+ if (column.type_generic === GenericDataType.Numeric) {
+ config.aggregate = AGGREGATES.SUM;
+ } else if (
+ column.type_generic === GenericDataType.String ||
+ column.type_generic === GenericDataType.Boolean ||
+ column.type_generic === GenericDataType.Temporal
+ ) {
+ config.aggregate = AGGREGATES.COUNT_DISTINCT;
+ }
+ return new AdhocMetric(config);
Review Comment:
Happy to set a default here, any suggestion on what it should be ?
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