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Graph/pagination-count-query-drift

AntiPattern

Generated Count Query Drift

pagination-count-query-drift

Pagination mechanisms reuse the original query (often including sort and joins) to auto-generate the total-count query, producing invalid SQL/JPQL that fails only for pageable/count paths instead of the base fetch.

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Updated6/25/2026

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30 linked nodes

MATCHESSolution

Track loading per request (e.g., per action or with a counter) instead of one global boolean, or guard/remain mounted so that remounting does not retrigger the fetch. E.g., use separate `loading` flags or increment/decrement an in-flight counter and render spinner only when the counter is > 0.

MATCHESSolution

just don't do it. — while still being able to show an accurate unread counter. Tension: avoid updating many rows on every new message. Outcome: Save a bookmark where they left off and count whatever appeared after that.

MATCHESSolution

You should really use tag validation to trigger your query endpoints to refetch upon any successful mutation. — onSuccess: async () => { await queryClient.invalidateQueries({ queryKey: ["vehicle.getVehiclesWithMakes"],. Tension: Both are less than ideal. Outcome: await queryClient.invalidateQueries({ queryKey: ["vehicle.getVehiclesWithMakes"], // <-- invalidates tag key });.

MATCHESSolution

handle a scenario when the code is fine but backend went offline — prefetching data with usePrefetchQuery. Tension: prefetch works.

MATCHESSolution

you can use the fetchStatus value to know what is happening — useInfiniteQuery({ queryKey: ['users'], queryFn: fetchUsers as any, initialPageParam: 1, getNextPageParam: (lastPage) => lastPage.nextCursor, });. Tension: isFetching always returns True. Outcome: console.log(fetchStatus === 'fetching');.

MATCHESSolution

Precomputed counts (tally tables) aren't inherently a bad idea — for this particular use case. Tension: it's great to have those already prepared for when a user comes back, but it should stay out of the way of active users' traffic. Outcome: not necessarily the way you do it.

MATCHESSolution

Boto3 provides a helper, called Paginators. Tension: you will need to enumerate all of the objects. Outcome: keep the complete list of objects as you encounter them, then you can operate on the list as desired.

MATCHESSolution

Use the same query argument value that identifies the `getUsers` cache entry (for `getUsers: query: (count) => ...`, pass the `count` as the cache key). In `onQueryStarted`, destructure the mutation argument accordingly (e.g., `{ count, ...patch }`) and call `updateQueryData('getUsers', count, ...)`.

MATCHESSolution

Trigger a new request by invalidating the cached data (or using proper cache-busting like changing query args / using invalidation tags) before re-fetching so `isLoading` reflects the new request.

MATCHESSolution

without using reWriteBatchedInserts inserts will not be merged — set batch_size > 1. Tension: Hibernate send multiple statement in the same time and not merging them into multi-valued INSERT. Outcome: without using reWriteBatchedInserts inserts will not be merged.

MATCHESSolution

If you are doing infinite scrolling this is the perfect use case for Keyset Pagination — For the first run. Tension: On the subsequent runs, add a `WHERE` predicate. Outcome: and `$4` should be the highest ID you got on the previous run.

MATCHESSolution

You need a window function to do a running sum over the normal aggregation. — select count(distinct mt.customer) as count. Outcome: sum(count(distinct mt.customer)) over (order by mt.enrollment_dt rows unbounded preceding) as running_count.

MATCHESSolution

annotate fields(ex: id) with `sequenceGenerator` not the Entity or class — @Entity @Table(name = "ENTITY") public class ENTITY extends PanacheEntityBase. Tension: those values are inconsistent. Outcome: @Id @SequenceGenerator(name = "ID_SEQ", sequenceName = "ID_SEQ", allocationSize =100) public Integer id;.

MATCHESSolution

I am trying to create a generated always column that takes the Current Date, subtract the previously mentioned int column to get an Age (int). — I am trying to learn Postgresql (12) "on the job" and seem to be stuck on a rather simple issue. Tension: the logic is faulty in that the `asset_age` is calculated when the row is inserted in the table or its underlying columns updated so as time moves on your asset ages go out of sync. Outcome: You can most easily solve your issue by dropping column `asset_age` from your table and create a view that calculates the value whenever you need it:.

MATCHESSolution

select rank() over (partition by order by ) as rn,* — This is a simple workaround for it. Outcome: as rn,* from ;.

MATCHESSolution

a workaround for this — when directly fetching objects using findById. Tension: the bug is still there. Outcome: There is an existing bug in Hibernate 6.2.

MATCHESSolution

Or you can increment value in one query — for READ_COMMITTED. Tension: There are solutions for READ_COMMITTED:.

MATCHESSolution

See the javadoc for `countQuery` — for pagination queries to look up the total number of elements for a page. Tension: it is using the original query (including the sort) to perform the count which results in an invalid query. Outcome: add a custom count query which excludes the sort and everything should work as expected.

MATCHESSolution

is used page PageableDefault. Tension: I can succesfully use pagination `/demo?page=0&size=1` and sorting `/demo?sort=amount,desc` but I cannot use the combination `/demo?page=0&size=1&sort=amount. Outcome: it works.

MATCHESSolution

Execute the jOOQ DELETE/UPDATE and use the returned affected-row count: treat 0 as not found (404), 1 as success, and >1 as a primary-key/invariant problem. Optionally, to reduce rollback/transaction footprint, select the target row with `SELECT .. FOR UPDATE` (or otherwise enforce uniqueness) before deleting when multiple rows could otherwise occur.

MATCHESSolution

if you use derived queries.

MATCHESSolution

Upon startup perform a max aggregate Mongo query to find highest number, store in an `AtomicLong` typed variable — Single JVM. Tension: If you have more than one JVM then you no option but to use some other mechanism to managed shared state. Outcome: That returns 100,101,102, etc on subsequent calls, use that value in your `ProductService.createProduct()`.

MATCHESSolution

The SQL for the finder is always executed on the database. — default configuration for JPA is to flush the persistence context to the database before a finder ist executed. Tension: JPA doesn't have functionality to search the unflushed persistence context containing the in memory entities. Outcome: This is why default configuration for JPA is to flush the persistence context to the database before a finder ist executed.

MATCHESSolution

the solution shown below — exceeding the SQL parameter limit. Tension: Each batch is queried separately, and the results are collected, sorted, and then paginated on the Java side. Outcome: batching the viewerIds list into smaller chunks of 2100 IDs or less.

MATCHESSolution

allTickets.sort(Comparator.comparing(Ticket::getSomeField));. Tension: Apply pagination on the sorted list. Outcome: return new PageImpl<>(allTickets.subList(start, end), pageable, allTickets.size()).

MATCHESSolution

Use the JPQL/HQL variant that adds an OVER clause with partitioning (and ordering) so Hibernate accepts ARRAY_AGG, returning the projection via a constructor expression.

MATCHESSolution

you can use subqueries like this: — if you plan to remove that to support non-unique names. Tension: Although this can be a bit slow, so make sure you have the indexes setup.

MATCHESSolution

iterate through a QuerySet of a QuerySet.

MATCHESSolution

Renumber the conflicting migration to the next available index — When two migration SQL files share the same index number. Tension: Verify no other code references the old filename. Outcome: 0016_seed_leech_ratio.sql → 0017_seed_leech_ratio.sql.

MATCHESSolution

Count by iterating only the player's list. Tension: pruning destroyed objects lazily during the count. Outcome: no separate cleanup pass needed.

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