{"record":{"id":"60bcba941efc2a72","repo":"multica-ai/multica","slug":"iterate-dry-run-summary-w","errorCode":null,"errorMessage":"iterate dry-run summary: %w","messagePattern":"iterate dry-run summary: %w","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"server/cmd/backfill_codex_usage_cache/main.go","lineNumber":231,"sourceCode":"\t\t\t&row.Rows,\n\t\t\t&row.InputBefore,\n\t\t\t&row.InputAfter,\n\t\t\t&row.Overcount,\n\t\t\t&row.ClampedRows,\n\t\t\t&row.MinCreatedUTC,\n\t\t\t&row.MaxCreatedUTC,\n\t\t); err != nil {\n\t\t\treturn nil, totals{}, fmt.Errorf(\"scan dry-run summary: %w\", err)\n\t\t}\n\t\tsummaries = append(summaries, row)\n\t\ttotal.Rows += row.Rows\n\t\ttotal.InputBefore += row.InputBefore\n\t\ttotal.InputAfter += row.InputAfter\n\t\ttotal.Overcount += row.Overcount\n\t\ttotal.ClampedRows += row.ClampedRows\n\t}\n\tif err := rows.Err(); err != nil {\n\t\treturn nil, totals{}, fmt.Errorf(\"iterate dry-run summary: %w\", err)\n\t}\n\treturn summaries, total, nil\n}\n\nfunc logSummary(cfg config, rows []summaryRow, total totals) {\n\tslog.Info(\"Codex usage cache backfill candidate total\",\n\t\t\"execute\", cfg.execute,\n\t\t\"cutoff\", cfg.cutoff.Format(time.RFC3339),\n\t\t\"workspace_id\", cfg.workspaceID,\n\t\t\"rows\", total.Rows,\n\t\t\"input_before\", total.InputBefore,\n\t\t\"input_after\", total.InputAfter,\n\t\t\"input_tokens_removed\", total.Overcount,\n\t\t\"clamped_rows\", total.ClampedRows)\n\tfor _, row := range rows {\n\t\tslog.Info(\"candidate summary\",\n\t\t\t\"workspace_id\", row.WorkspaceID,\n\t\t\t\"date_utc\", row.DateUTC,","sourceCodeStart":213,"sourceCodeEnd":249,"githubUrl":"https://github.com/multica-ai/multica/blob/2c0912b6ec764b373d44eeea1e80f0d9f11ab417/server/cmd/backfill_codex_usage_cache/main.go#L213-L249","documentation":"Returned when rows.Err() is non-nil after iterating the dry-run summary — i.e. the iteration itself failed mid-cursor (network drop, statement timeout, context cancellation via SIGINT) rather than the initial query or a single row scan. Partial summaries may already be logged; no data was modified because this is read-only phase.","triggerScenarios":"Statement timeout or connection loss while streaming a large summary cursor; Ctrl-C (signal.NotifyContext cancels ctx) during iteration; postgres restart mid-cursor.","commonSituations":"Very large task_usage tables exceeding statement_timeout on the summary query; flaky network to a remote database; operators aborting what looks like a hang.","solutions":["If a statement timeout is named in the wrapped error, raise it for the session (e.g. options='-c statement_timeout=0' in the DSN) and re-run.","Scope the dry-run with --workspace-id to shrink the cursor, then run per workspace.","If you Ctrl-C'd it, simply re-run; the phase is read-only and safe to repeat."],"exampleFix":"# before\nDATABASE_URL='postgres://...?sslmode=require' ./backfill_codex_usage_cache --cutoff ...\n# iterate dry-run summary: ... statement timeout\n\n# after\nDATABASE_URL='postgres://...?sslmode=require&options=-c%3Dstatement_timeout%3D0' \\\n  ./backfill_codex_usage_cache --cutoff 2026-06-01T12:00:00Z","handlingStrategy":"retry","validationCode":"# Raise statement timeout for the session when summarizing huge tables\nexport DATABASE_URL=\"${DATABASE_URL}?options=-c%3Dstatement_timeout%3D0\"","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Scope dry-runs per workspace (--workspace-id) on very large datasets.","Avoid Ctrl-C during summary iteration; it is read-only and finishes faster than it appears to hang.","Keep the connection stable (watch pgbouncer idle timeouts) for the full run."],"tags":["database","backfill","timeout","iteration","cancellation"],"backgroundTag":null,"analyzedSha":"2c0912b6ec764b373d44eeea1e80f0d9f11ab417","analyzedAt":"2026-08-15T13:25:18.241Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}