From 00f6cd6f50ab172d34e4dde6cc90eeb3751003ba Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Carl-Gerhard=20Lindesva=CC=88rd?= <lindesvard@gmail.com>
Date: Tue, 3 Mar 2026 23:54:53 +0100
Subject: [PATCH] fix: importer 2..

---
 packages/db/src/services/import.service.ts | 59 ++++++++++++----------
 1 file changed, 31 insertions(+), 28 deletions(-)

diff --git a/packages/db/src/services/import.service.ts b/packages/db/src/services/import.service.ts
index 3357ebf9..ec146809 100644
--- a/packages/db/src/services/import.service.ts
+++ b/packages/db/src/services/import.service.ts
@@ -226,16 +226,27 @@ export async function createSessionsStartEndEvents(
     "name NOT IN ('session_start', 'session_end')",
   ].join(' AND ');
 
-  const sessionBatchSubquery = `
-    (SELECT DISTINCT session_id
-     FROM ${TABLE_NAMES.events_imports}
-     WHERE ${baseWhere}
-       AND session_id > {lastSessionId:String}
-     ORDER BY session_id
-     LIMIT {limit:UInt32})
-  `;
-
   while (true) {
+    const idsResult = await ch.query({
+      query: `
+        SELECT DISTINCT session_id
+        FROM ${TABLE_NAMES.events_imports}
+        WHERE ${baseWhere}
+          AND session_id > {lastSessionId:String}
+        ORDER BY session_id
+        LIMIT {limit:UInt32}
+      `,
+      query_params: { importId, lastSessionId, limit: SESSION_BATCH_SIZE },
+      format: 'JSONEachRow',
+    });
+
+    const idRows = (await idsResult.json()) as Array<{ session_id: string }>;
+    if (idRows.length === 0) {
+      break;
+    }
+
+    const maxSessionId = idRows.at(-1)!.session_id;
+
     const sessionEventsQuery = `
       SELECT
         device_id,
@@ -252,13 +263,14 @@ export async function createSessionsStartEndEvents(
         max(created_at) AS last_timestamp
       FROM ${TABLE_NAMES.events_imports}
       WHERE ${baseWhere}
-        AND session_id IN ${sessionBatchSubquery}
+        AND session_id > {lastSessionId:String}
+        AND session_id <= {maxSessionId:String}
       GROUP BY session_id, device_id, project_id
     `;
 
     const sessionEventsResult = await ch.query({
       query: sessionEventsQuery,
-      query_params: { importId, lastSessionId, limit: SESSION_BATCH_SIZE },
+      query_params: { importId, lastSessionId, maxSessionId },
       format: 'JSONEachRow',
     });
 
@@ -411,11 +423,8 @@ export async function createSessionsStartEndEvents(
       await insertImportBatch(sessionEvents, importId);
     }
 
-    if (sessionData.length === 0) {
-      break;
-    }
-    lastSessionId = sessionData.at(-1)!.session_id;
-    if (sessionData.length < SESSION_BATCH_SIZE) {
+    lastSessionId = maxSessionId;
+    if (idRows.length < SESSION_BATCH_SIZE) {
       break;
     }
   }
@@ -476,15 +485,6 @@ export async function backfillSessionsToProduction(
   const SESSION_BATCH_SIZE = 5000;
   let lastSessionId = '';
 
-  const baseWhere = 'import_id = {importId:String} AND session_id > {lastSessionId:String}';
-  const sessionBatchSubquery = `
-    (SELECT DISTINCT session_id
-     FROM ${TABLE_NAMES.events_imports}
-     WHERE ${baseWhere}
-     ORDER BY session_id
-     LIMIT {limit:UInt32})
-  `;
-
   while (true) {
     const idsResult = await ch.query({
       query: `
@@ -504,6 +504,8 @@ export async function backfillSessionsToProduction(
       break;
     }
 
+    const maxSessionId = idRows.at(-1)!.session_id;
+
     const sessionsInsertQuery = `
       INSERT INTO ${TABLE_NAMES.sessions} (
         id, project_id, profile_id, device_id, created_at, ended_at,
@@ -560,13 +562,14 @@ export async function backfillSessionsToProduction(
       FROM ${TABLE_NAMES.events_imports} e
       WHERE 
         e.import_id = {importId:String}
-        AND e.session_id IN ${sessionBatchSubquery}
+        AND e.session_id > {lastSessionId:String}
+        AND e.session_id <= {maxSessionId:String}
       GROUP BY e.session_id
     `;
 
     await ch.command({
       query: sessionsInsertQuery,
-      query_params: { importId, lastSessionId, limit: SESSION_BATCH_SIZE },
+      query_params: { importId, lastSessionId, maxSessionId },
       clickhouse_settings: {
         wait_end_of_query: 1,
         send_progress_in_http_headers: 1,
@@ -574,7 +577,7 @@ export async function backfillSessionsToProduction(
       },
     });
 
-    lastSessionId = idRows.at(-1)!.session_id;
+    lastSessionId = maxSessionId;
     if (idRows.length < SESSION_BATCH_SIZE) {
       break;
     }