Re-write CH queries to use query params.

queries/analytics/session/getSessions.ts

@@ -0,0 +1,52 @@
+import prisma from 'lib/prisma';
+import clickhouse from 'lib/clickhouse';
+import { runQuery, PRISMA, CLICKHOUSE } from 'lib/db';
+
+export async function getSessions(...args: [websites: string[], startAt: Date]) {
+  return runQuery({
+    [PRISMA]: () => relationalQuery(...args),
+    [CLICKHOUSE]: () => clickhouseQuery(...args),
+  });
+}
+
+async function relationalQuery(websites: string[], startAt: Date) {
+  return prisma.client.session.findMany({
+    where: {
+      ...(websites && websites.length > 0
+        ? {
+            websiteId: {
+              in: websites,
+            },
+          }
+        : {}),
+      createdAt: {
+        gte: startAt,
+      },
+    },
+  });
+}
+
+async function clickhouseQuery(websites: string[], startAt: Date) {
+  const { rawQuery } = clickhouse;
+
+  return rawQuery(
+    `select distinct
+      session_id,
+      website_id,
+      created_at,
+      hostname,
+      browser,
+      os,
+      device,
+      screen,
+      language,
+      country
+    from event
+    where ${websites && websites.length > 0 ? `website_id in {websites:Array(UUID)}` : '0 = 0'}
+      and created_at >= {startAt:DateTime('UTC')}`,
+    {
+      websites,
+      startAt,
+    },
+  );
+}