fix(schema-compiler): Handle member expressions in keyDimensions

If dimension is member expression, `d.dimension` would be object, and key would be '[object Object]' string, so separate dimensions would have same key, and all but one will be eliminated

Author: mcheshkov

packages/cubejs-schema-compiler/src/adapter/BaseQuery.js

@@ -1855,7 +1855,14 @@ export class BaseQuery {
   keyDimensions(primaryKeyDimensions) {
     // The same dimension with different granularities maybe requested, so it's not enough to filter only by dimension
     return R.uniqBy(
-      (d) => `${d.dimension}${d.granularity ?? ''}`, this.dimensionsForSelect()
+      (d) => {
+        if (d.isMemberExpression) {
+          return d.dimension.definition;
+        }
+
+        return `${d.dimension}${d.granularity ?? ''}`;
+      },
+      this.dimensionsForSelect()
         .concat(primaryKeyDimensions)
     );
   }

packages/cubejs-schema-compiler/test/integration/postgres/sql-generation.test.ts

@@ -2974,6 +2974,61 @@ describe('SQL Generation', () => {
     }]
   ));
 
+  // Subquery aggregation for multiplied measure (and any `keysSelect` for that matter)
+  // should pick up all dimensions, even through member expressions
+  it('multiplied sum with dimension member expressions', async () => runQueryTest(
+    {
+      measures: [
+        'visitors_visitors_checkins_view.revenue',
+        'visitors_visitors_checkins_view.visitor_checkins_count',
+      ],
+      dimensions: [
+        {
+          expression: new Function(
+            'visitors_visitors_checkins_view',
+            // eslint-disable-next-line no-new-func,no-template-curly-in-string
+            'return `LOWER(${visitors_visitors_checkins_view.source})`'
+          ),
+          expressionName: 'lower_source',
+          // eslint-disable-next-line no-template-curly-in-string
+          definition: 'LOWER(${visitors_visitors_checkins_view.source})',
+          cubeName: 'visitors_visitors_checkins_view',
+        },
+        {
+          expression: new Function(
+            'visitors_visitors_checkins_view',
+            // eslint-disable-next-line no-new-func,no-template-curly-in-string
+            'return `UPPER(${visitors_visitors_checkins_view.source})`'
+          ),
+          expressionName: 'upper_source',
+          // eslint-disable-next-line no-template-curly-in-string
+          definition: 'UPPER(${visitors_visitors_checkins_view.source})',
+          cubeName: 'visitors_visitors_checkins_view',
+        },
+      ],
+    },
+    [
+      {
+        lower_source: null,
+        upper_source: null,
+        visitors_visitors_checkins_view__revenue: '1400',
+        visitors_visitors_checkins_view__visitor_checkins_count: '0',
+      },
+      {
+        lower_source: 'google',
+        upper_source: 'GOOGLE',
+        visitors_visitors_checkins_view__revenue: '300',
+        visitors_visitors_checkins_view__visitor_checkins_count: '1',
+      },
+      {
+        lower_source: 'some',
+        upper_source: 'SOME',
+        visitors_visitors_checkins_view__revenue: '300',
+        visitors_visitors_checkins_view__visitor_checkins_count: '5',
+      },
+    ]
+  ));
+
   // TODO not implemented
   // it('multi stage bucketing', async () => runQueryTest(
   //   {