projection

DE//AGENT currently lists 2 resources under projection: 1 tutorial, 1 skill. Everything below is derived from the live registry — counts, capabilities, verification state and security posture come from the curated records, never from marketing copy.

Documented learning objectives across these resources:

• Read the scanned-bytes metric per query — via Cut Athena bytes scanned with partitions and projection
• Apply partition projection for high-cardinality columns — via Cut Athena bytes scanned with partitions and projection
• Compact small files to cut per-request overhead — via Cut Athena bytes scanned with partitions and projection

These resources map to stage: Cloud (2). Follow the four-phase roadmap to place this topic inside a progression instead of learning it in isolation.

Every entry, its shape and its trust state — sorted by the registry's composite score. This table is the honest version of a marketing comparison: no sponsored placements, no unverifiable claims.

How scores are computed: source quality score.

Highest composite score first:

1. Cut Athena bytes scanned with partitions and projection score 34.15 — beginner
2. Athena Partition Advisor score 33.4 — intermediate

Scores rank provenance, completeness and trust — read how verification works before adopting anything.

Start here if you're new: Cut Athena bytes scanned with partitions and projection.

Security-flagged entries: Athena Partition Advisor (3 flags). Flags mean the record declares capabilities like credential use or write access — read the security posture on each page before connecting.

• Cut Athena bytes scanned with partitions and projection — Walk one expensive Athena query through the Partition Advisor's levers in order: confirm the per-TB bill model, partition on the dominant filter column, replace MSCK REPAIR with pa… details
• Athena Partition Advisor — Recommends partition projection, bucketing or file-layout changes to reduce Athena bytes-scanned, and writes the projection DDL. details

Real install commands from the registry — read the source before running any of them:

npx de-agent-platform add athena-partition-advisor

Athena Partition Advisor — review first

Adjacent topics: cost (2 shared), partitions (2 shared).

Study path: the roadmap places this topic in a progression · the scoring model explains the numbers · the trust rule catalog shows every security check these entries passed through.