fix(schema-compiler): Fix multifact joined queries in Tesseract

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

@@ -5062,7 +5062,7 @@ export class BaseQuery {
         return false;
       }
 
-      return dfs(root) ? path.join('.') : null;
+      return (root && dfs(root)) ? path.join('.') : null;
     };
   }
 
@@ -5080,7 +5080,7 @@ export class BaseQuery {
       const [cube, field] = member.split('.');
       if (!cube || !field) return member;
 
-      if (cube === queryJoinRoot.root) {
+      if (cube === queryJoinRoot?.root) {
         return member;
       }
 

packages/cubejs-schema-compiler/src/adapter/PreAggregations.ts

@@ -144,7 +144,7 @@ export class PreAggregations {
     const { join } = this.query;
     if (!join) {
       // This can happen with Tesseract, or when there's no cubes to join
-      throw new Error('Unexpected missing join tree for query');
+      return [];
     }
     return join.joins.map(j => j.originalTo).concat([join.root]);
   }

packages/cubejs-schema-compiler/test/integration/postgres/multi-fact-join.test.ts

@@ -112,29 +112,23 @@ cube(\`city\`, {
     );
   }
 
-  if (getEnv('nativeSqlPlanner')) {
-    it.skip('FIXME(tesseract): two regular sub-queries', () => {
-      // TODO: Fix in tesseract
-    });
-  } else {
-    it('two regular sub-queries', async () => runQueryTest({
-      measures: ['orders.amount', 'shipments.count'],
-      dimensions: [
-        'city.name'
-      ],
-      order: [{ id: 'city.name' }]
-    }, [{
-      city__name: 'New York City',
-      orders__amount: '9',
-      shipments__count: '3',
-    }, {
-      city__name: 'San Francisco',
-      orders__amount: '6',
-      shipments__count: '1',
-    }, {
-      city__name: null,
-      orders__amount: '6',
-      shipments__count: '1',
-    }]));
-  }
+  it('two regular sub-queries', async () => runQueryTest({
+    measures: ['orders.amount', 'shipments.count'],
+    dimensions: [
+      'city.name'
+    ],
+    order: [{ id: 'city.name' }]
+  }, [{
+    city__name: 'New York City',
+    orders__amount: '9',
+    shipments__count: '3',
+  }, {
+    city__name: 'San Francisco',
+    orders__amount: '6',
+    shipments__count: '1',
+  }, {
+    city__name: null,
+    orders__amount: '6',
+    shipments__count: '1',
+  }]));
 });