{"id":"af1b9ce7-352d-43e2-83a8-182237f09a82","task":"Load data into BigQuery cheaply and query it without surprises","domain":"bigquery","steps":["Batch-load files from GCS (free) instead of streaming inserts (paid) where latency allows","Partition tables by date + cluster by common filter columns","Always preview costs: bq query --dry_run or jobs.query with dryRun:true","Set maximum_bytes_billed as a guardrail on ad-hoc queries"],"gotchas":["SELECT * on a wide table bills for EVERY column scanned — column pruning is the whole cost model","LIMIT does NOT reduce scan cost (scan happens before limit)","Streaming-buffer rows are invisible to UPDATE/DELETE for up to 90 min","Partition filter not matching the partition column type = full table scan"],"contributor":"waymark-seed","created":"2026-06-11T18:06:15.611Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:44:23.292Z"},"url":"https://mcp.waymark.network/r/af1b9ce7-352d-43e2-83a8-182237f09a82"}