[WIP] fix(schema-compiler): Support member alias for TD with granularity

Author: mcheshkov

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

@@ -3103,7 +3103,8 @@ export class BaseQuery {
           const outputColumnTypes = [
             ...(query.dimensions || []).map(d => findSchemaType(d.dimension)),
             ...(query.timeDimensions || []).map(t => ({
-              name: `${this.aliasName(t.dimension)}_${t.granularity}`,
+              // TODO is it ok to do so?
+              name: this.aliasName(`${t.dimension}.${t.granularity}`),
               type: 'TIMESTAMP'
             })),
             ...(query.measures || []).map(m => findSchemaType(m.measure)),

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

@@ -70,11 +70,13 @@ export class BaseTimeDimension extends BaseFilter {
     return super.aliasName();
   }
 
-  // @ts-ignore
-  public unescapedAliasName(granularity: string) {
-    const actualGranularity = granularity || this.granularityObj?.granularity || 'day';
+  public unescapedAliasName(granularity?: string) {
+    const actualGranularity = granularity ?? this.granularityObj?.granularity ?? 'day';
 
-    return `${this.query.aliasName(this.dimension)}_${actualGranularity}`; // TODO date here for rollups
+    const fullName = `${this.dimension}.${actualGranularity}`;
+
+    // TODO date here for rollups
+    return this.query.aliasName(fullName);
   }
 
   public dateSeriesAliasName() {