feat: Expose aliasMember for hierarchy in View

Author: ovr

packages/cubejs-api-gateway/openspec.yml

@@ -182,6 +182,9 @@ components:
       properties:
         name:
           type: "string"
+        aliasMember:
+          description: "When hierarchy is defined in Cube, it keeps the original path: Cube.hierarchy"
+          type: "string"
         title:
           type: "string"
         levels:

packages/cubejs-schema-compiler/src/compiler/CubeEvaluator.ts

@@ -308,6 +308,7 @@ export class CubeEvaluator extends CubeSymbols {
     if (cube.isView && (cube.includedMembers || []).length) {
       const includedMemberPaths: string[] = R.uniq(cube.includedMembers.map(it => it.memberPath));
       const includedCubeNames: string[] = R.uniq(includedMemberPaths.map(it => it.split('.')[0]));
+
       // Path to name (which can be prefixed or aliased) map for hierarchy
       const hierarchyPathToName = cube.includedMembers.filter(it => it.type === 'hierarchies').reduce((acc, it) => ({
         ...acc,
@@ -336,14 +337,18 @@ export class CubeEvaluator extends CubeSymbols {
               })
                 .filter(Boolean);
 
-              const name = hierarchyPathToName[[cubeName, it.name].join('.')];
+              const aliasMember = [cubeName, it.name].join('.');
+
+              const name = hierarchyPathToName[aliasMember];
               if (!name) {
                 throw new UserError(`Hierarchy '${it.name}' not found in cube '${cubeName}'`);
               }
+
               return {
                 // Title might be overridden in the view
                 title: cube.hierarchies?.[it.name]?.override?.title || it.title,
                 ...it,
+                aliasMember,
                 name,
                 levels
               };

packages/cubejs-schema-compiler/src/compiler/CubeToMetaTransformer.js

@@ -109,6 +109,7 @@ export class CubeToMetaTransformer {
         )(cube.segments || {}),
         hierarchies: (cube.evaluatedHierarchies || []).map((it) => ({
           ...it,
+          aliasMember: it.aliasMember,
           public: it.public ?? true,
           name: `${cube.name}.${it.name}`,
         })),