feat(schema-compiler): expose custom granularities details via meta API and query annotation

packages/cubejs-api-gateway/openspec.yml

@@ -103,11 +103,18 @@ components:
       required:
         - name
         - title
+        - interval
       properties:
         name:
           type: "string"
         title:
           type: "string"
+        interval:
+          type: "string"
+        offset:
+          type: "string"
+        origin:
+          type: "string"
     V1CubeMetaDimension:
       type: "object"
       required:

packages/cubejs-api-gateway/src/helpers/prepareAnnotation.ts

@@ -6,11 +6,20 @@
  */
 
 import R from 'ramda';
+import { isPredefinedGranularity } from '@cubejs-backend/shared';
 import { MetaConfig, MetaConfigMap, toConfigMap } from './toConfigMap';
 import { MemberType } from '../types/strings';
 import { MemberType as MemberTypeEnum } from '../types/enums';
 import { MemberExpression } from '../types/query';
 
+type GranularityMeta = {
+  name: string;
+  title: string;
+  interval: string;
+  offset?: string;
+  origin?: string;
+};
+
 /**
  * Annotation item for cube's member.
  */
@@ -23,6 +32,11 @@ type ConfigItem = {
   meta: any;
   drillMembers?: any[];
   drillMembersGrouped?: any;
+  granularities?: GranularityMeta[];
+};
+
+type AnnotatedConfigItem = Omit<ConfigItem, 'granularities'> & {
+  granularity?: GranularityMeta;
 };
 
 /**
@@ -50,7 +64,10 @@ const annotation = (
     ...(memberType === MemberTypeEnum.MEASURES ? {
       drillMembers: config.drillMembers,
       drillMembersGrouped: config.drillMembersGrouped
-    } : {})
+    } : {}),
+    ...(memberType === MemberTypeEnum.DIMENSIONS && config.granularities ? {
+      granularities: config.granularities || [],
+    } : {}),
   }];
 };
 
@@ -81,25 +98,52 @@ function prepareAnnotation(metaConfig: MetaConfig[], query: any) {
         (query.timeDimensions || [])
           .filter(td => !!td.granularity)
           .map(
-            td => [
-              annotation(
+            td => {
+              const an = annotation(
                 configMap,
                 MemberTypeEnum.DIMENSIONS,
               )(
                 `${td.dimension}.${td.granularity}`
-              )
-            ].concat(
+              );
+
+              let dimAnnotation: [string, AnnotatedConfigItem] | undefined;
+
+              if (an) {
+                let granularityMeta: GranularityMeta | undefined;
+                if (isPredefinedGranularity(td.granularity)) {
+                  granularityMeta = {
+                    name: td.granularity,
+                    title: td.granularity,
+                    interval: `1 ${td.granularity}`,
+                  };
+                } else if (an[1].granularities) {
+                  // No need to send all the granularities defined, only those make sense for this query
+                  granularityMeta = an[1].granularities.find(g => g.name === td.granularity);
+                }
+
+                const { granularities: _, ...rest } = an[1];
+                dimAnnotation = [an[0], { ...rest, granularity: granularityMeta }];
+              }
+
               // TODO: deprecated: backward compatibility for
               // referencing time dimensions without granularity
-              dimensions.indexOf(td.dimension) === -1
-                ? [
-                  annotation(
-                    configMap,
-                    MemberTypeEnum.DIMENSIONS
-                  )(td.dimension)
-                ]
-                : []
-            ).filter(a => !!a)
+              if (dimensions.indexOf(td.dimension) !== -1) {
+                return [dimAnnotation].filter(a => !!a);
+              }
+
+              const dimWithoutGranularity = annotation(
+                configMap,
+                MemberTypeEnum.DIMENSIONS
+              )(td.dimension);
+
+              if (dimWithoutGranularity && dimWithoutGranularity[1].granularities) {
+                // no need to populate granularities here
+                dimWithoutGranularity[1].granularities = undefined;
+              }
+
+              return [dimAnnotation].concat([dimWithoutGranularity])
+                .filter(a => !!a);
+            }
           )
       )
     ),

packages/cubejs-api-gateway/test/helpers/prepareAnnotation.test.ts

@@ -164,7 +164,7 @@ describe('prepareAnnotation helpers', () => {
         type: undefined,
       }
     });
-    
+
     // query timeDimensions
     expect(
       prepareAnnotation([{
@@ -197,6 +197,11 @@ describe('prepareAnnotation helpers', () => {
         shortTitle: undefined,
         title: undefined,
         type: undefined,
+        granularity: {
+          name: 'day',
+          title: 'day',
+          interval: '1 day',
+        }
       },
     });
 

packages/cubejs-api-gateway/test/index.test.ts

@@ -316,6 +316,28 @@ describe('API Gateway', () => {
     expect(res.body && res.body.data).toStrictEqual([{ 'Foo.bar': 42 }]);
   });
 
+  test('custom granularities in annotation', async () => {
+    const { app } = await createApiGateway();
+
+    const res = await request(app)
+      .get(
+        '/cubejs-api/v1/load?query={"measures":["Foo.bar"],"timeDimensions":[{"dimension":"Foo.timeGranularities","granularity":"half_year_by_1st_april"}]}'
+      )
+      .set('Authorization', 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.e30.t-IDcSemACt8x4iTMCda8Yhe3iZaWbvV5XKSTbuAn0M')
+      .expect(200);
+    console.log(res.body);
+    expect(res.body && res.body.data).toStrictEqual([{ 'Foo.bar': 42 }]);
+    expect(res.body.annotation.timeDimensions['Foo.timeGranularities.half_year_by_1st_april'])
+      .toStrictEqual({
+        granularity: {
+          name: 'half_year_by_1st_april',
+          title: 'Half Year By1 St April',
+          interval: '6 months',
+          offset: '3 months',
+        }
+      });
+  });
+
   test('dry-run', async () => {
     const { app } = await createApiGateway();
 

packages/cubejs-api-gateway/test/mocks.ts

@@ -98,6 +98,18 @@ export const compilerApi = jest.fn().mockImplementation(async () => ({
               name: 'Foo.time',
               isVisible: true,
             },
+            {
+              name: 'Foo.timeGranularities',
+              isVisible: true,
+              granularities: [
+                {
+                  name: 'half_year_by_1st_april',
+                  title: 'Half Year By1 St April',
+                  interval: '6 months',
+                  offset: '3 months'
+                }
+              ]
+            },
           ],
           segments: [
             {

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

@@ -85,6 +85,9 @@ export class CubeToMetaTransformer {
                 ? R.compose(R.map((g) => ({
                   name: g[0],
                   title: this.title(cubeTitle, g, true),
+                  interval: g[1].interval,
+                  offset: g[1].offset,
+                  origin: g[1].origin,
                 })), R.toPairs)(nameToDimension[1].granularities)
                 : undefined,
           })),

packages/cubejs-schema-compiler/test/unit/schema.test.ts

@@ -314,11 +314,20 @@ describe('Schema Testing', () => {
     let gr = dg.granularities.find(g => g.name === 'half_year');
     expect(gr).toBeDefined();
     expect(gr.title).toBe('6 month intervals');
+    expect(gr.interval).toBe('6 months');
+
+    gr = dg.granularities.find(g => g.name === 'half_year_by_1st_april');
+    expect(gr).toBeDefined();
+    expect(gr.title).toBe('Half year from Apr to Oct');
+    expect(gr.interval).toBe('6 months');
+    expect(gr.offset).toBe('3 months');
 
     // // Granularity defined without title -> titlize()
     gr = dg.granularities.find(g => g.name === 'half_year_by_1st_june');
     expect(gr).toBeDefined();
     expect(gr.title).toBe('Half Year By1 St June');
+    expect(gr.interval).toBe('6 months');
+    expect(gr.origin).toBe('2020-06-01 10:00:00');
   });
 
   it('join types', async () => {