add indexes to project_summary_view

migration/1715711077567-ProjectDonationSummaryViewV5.ts

@@ -0,0 +1,60 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class ProjectDonationSummaryViewV51715711077567
+  implements MigrationInterface
+{
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+            -- Create necessary indexes for optimization before creating the materialized view
+            CREATE INDEX IF NOT EXISTS idx_donation_project_user ON donation("projectId", "userId", "valueUsd") WHERE "status" = 'verified' AND "recurringDonationId" IS NULL;
+            CREATE INDEX IF NOT EXISTS idx_recurring_donation_project_donor ON recurring_donation("projectId", "donorId") WHERE "status" IN ('active', 'ended');
+            CREATE INDEX IF NOT EXISTS idx_project_total_donations ON project("id");
+    
+            -- Drop existing materialized view if it exists
+            DROP MATERIALIZED VIEW IF EXISTS project_donation_summary_view;
+    
+            -- Create optimized materialized view
+            CREATE MATERIALIZED VIEW project_donation_summary_view AS
+            WITH unique_donors AS (
+                SELECT 
+                  "projectId", 
+                  "userId"
+                FROM 
+                  "donation"
+                WHERE 
+                  "status" = 'verified' 
+                  AND "recurringDonationId" IS NULL 
+                  AND "valueUsd" > 0
+                
+                UNION
+                
+                SELECT 
+                  "projectId", 
+                  "donorId" AS "userId"
+                FROM 
+                  "recurring_donation"
+                WHERE 
+                  "status" IN ('active', 'ended')
+            )
+            SELECT
+              u."projectId",
+              (SELECT "totalDonations" FROM "project" WHERE "id" = u."projectId") AS "sumVerifiedDonations",
+              COUNT(DISTINCT u."userId") AS "uniqueDonorsCount"
+            FROM
+              unique_donors u
+            GROUP BY
+              u."projectId";
+            
+            -- Create an index on the materialized view to improve lookup performance
+            CREATE INDEX idx_project_donation_summary_project_id ON project_donation_summary_view USING hash ("projectId");
+        `);
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      `
+            DROP MATERIALIZED VIEW project_donation_summary_view;
+          `,
+    );
+  }
+}