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fix(monitor): resolve PostgreSQL type encoding issues for node metrics

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sagitchu
2026-03-24 10:45:17 +08:00
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plans/065-fix-node-metrics-postgres-type.md
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# Fix Node Metrics PostgreSQL Type Encoding
## Objective
Fix the PostgreSQL type encoding error (`failed to encode args[0]: unable to encode 5 into text format for text (OID 25)`) and `integer out of range` error when querying node metrics for time ranges greater than 1 hour.
## Tasks
- [x] Identify the problematic downsampled SQL aggregation in `GetNodeMetrics`.
- [x] Fix the `? AS node_id` placeholder which confused PostgreSQL's type inference by directly embedding the `nodeID` using `fmt.Sprintf("%d AS node_id")`.
- [x] Change all `CAST(X AS INTEGER)` to `CAST(X AS BIGINT)` to prevent 32-bit integer overflow on Unix millisecond timestamps in PostgreSQL.
- [x] Verify the build and tests pass.
- [ ] Commit all changes, create a new branch, push, create a Pull Request, merge the PR into `main`, and publish a new tag `2.1.9-rc9`.