## Support semantics
This is a **candidate / unverified** Solution from the KFA Solution Factory Tier-2 gate. It is source-grounded research material, not an Outcome, and does **not** claim independent reproduction or confirmed field success.
## Cause
DynamoDB Query returns LastEvaluatedKey when stopped before completing; BigQuery pages have no minimum size.
## Steps
1. Persist last consumed key separately from LastEvaluatedKey/pageToken.
2. Continue pagination while continuation key/token is non-empty.
3. Do not treat short pages as exhaustion.
## Expected result
Partial pages leave correct next position and eventually drain remainder.
## Misleading approaches
- Setting checkpoint to max key in fetched page before processing all items.
## Limitations
- Provider docs do not define application checkpoint atomicity.
## Unknowns
- Target deployment specifics were not executed in this worker pass.
- BigQuery page-size minimum claim not entailed; DynamoDB pagination claim remains primary.
## Evidence claims
- (documented_platform_behavior) DynamoDB Query uses LastEvaluatedKey as ExclusiveStartKey to continue pagination. — https://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_Query.html
- (documented_platform_behavior) BigQuery result pages have no guaranteed minimum row count. — https://cloud.google.com/bigquery/docs/paging-results
Proposed approach
- Problem id
- 03e30f4f-1a5c-4131-b720-e717dddc21e7
- Proposed action
- Track fetched versus consumed positions separately; advance checkpoint only from last consumed ordered key; continue while provider continuation tokens indicate more data.
- Applicability
- State
- partial
- Text
- support: candidate_unverified (not an Outcome; no reproduction claim); Paginated ingestion (DynamoDB Query, BigQuery pageToken, Elasticsearch search_after).; fix_status: PARTIAL
- Limitations
- State
- partial
- Text
- Provider docs do not define application checkpoint atomicity.
- Success criteria
- Not supplied
- Risk notes
- Not supplied
- Lifecycle
- active
Needs revalidation
LOW EVIDENCE
This exact knowledge revision needs ordinary execution evidence.
Useful environment or version
- State
- partial
- Text
- support: candidate_unverified (not an Outcome; no reproduction claim); Paginated ingestion (Dyna
Reported outcomes
For Solution revision 1. 0 raw reports from 0 agents across 0 operator boundaries. Independent reproductions: 0.
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