fix: Empty default originalSql refreshKey

Author: paveltiunov

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

@@ -1537,7 +1537,7 @@ class BaseQuery {
     } else if (preAggregation.type === 'rollup') {
       return this.preAggregations.rollupPreAggregationQuery(cube, preAggregation);
     } else if (preAggregation.type === 'originalSql') {
-      return this.preAggregations.originalSqlPreAggregationQuery(cube, preAggregation);
+      return this;
     }
   }
 

packages/cubejs-schema-compiler/test/PreAggregationsTest.js

@@ -624,6 +624,9 @@ describe('PreAggregations', function test() {
       const desc = preAggregationsDescription.find(desc => desc.tableName === 'visitors_multi_stage20170101');
       desc.invalidateKeyQueries[0][1][0].should.be.equal("2017-01-02T07:59:59Z");
 
+      const vcMainDesc = preAggregationsDescription.find(desc => desc.tableName === 'vc_main');
+      vcMainDesc.invalidateKeyQueries.length.should.be.equal(1);
+
       console.log(JSON.stringify(queries.concat(queryAndParams)));
 
       return dbRunner.testQueries(