✨ back: adding postgresql statistics (#762)

tdrive/backend/node/src/core/platform/services/database/services/orm/connectors/postgres/postgres.ts

@@ -74,10 +74,24 @@ export class PostgresConnector extends AbstractConnector<PostgresConnectionOptio
     switch (depth) {
       case TServiceDiagnosticDepth.alive:
         return { ok: true, didConnect: await this.ping() };
-      case TServiceDiagnosticDepth.stats_basic:
       case TServiceDiagnosticDepth.stats_track:
+        return {
+          ok: true,
+          db: (
+            await this.client.query("select * from pg_stat_database where datname = $1", [
+              this.options.database,
+            ])
+          ).rows,
+        };
+      case TServiceDiagnosticDepth.stats_basic:
+        return { ok: true, warn: "pgsql_basic_has_nothing_more_than_track" };
       case TServiceDiagnosticDepth.stats_deep:
-        return { ok: true, warn: "unsupported_depth" };
+        return {
+          ok: true,
+          databases: (await this.client.query("select * from pg_stat_database")).rows,
+          tables: (await this.client.query("select * from pg_stat_user_tables")).rows,
+          indexes: (await this.client.query("select * from pg_stat_user_indexes")).rows,
+        };
 
       default:
         throw new Error(`Unexpected TServiceDiagnosticDepth: ${JSON.stringify(depth)}`);

tdrive/backend/node/src/core/platform/services/diagnostics/providers/database-service.ts

@@ -1,4 +1,4 @@
 import diagnostics from "../../../framework/api/diagnostics";
 import globalResolver from "../../../../../services/global-resolver";
 
-export default () => diagnostics.registerServiceProviders("db", () => globalResolver.database, {});
+export default () => diagnostics.registerServiceProviders("db", () => globalResolver.database);