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Query across accounts and table formats with multi-catalog in Amazon EMR

Amazon EMR 8.1.0 adds multi-catalog support through the RedirectingSessionCatalog, so you can query Iceberg, Delta Lake, Hudi, and Hive tables through a single catalog and join data across AWS accounts without copying it. This post shows how to put these capabilities into practic

At a glance

Where	Lakehouse

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Last sweep 2026-10-24: 0 finding(s), 0 marked as examples.

Registry stats

Verification	community
Completeness	47
Trust multiplier	×0.63
Composite	23.55 · unproven
License	Proprietary
Security flags	none

Marketplace Quality Score

unproven (23.55/100)

Rule-based scoring across 7 dimensions. Higher is better. How it works

performance /100

completeness 47/100

test coverage 5/100

security 90/100

documentation 20/100

maintainability 0/100

community /100

Metadata

Category: Lakehouse
Stage: Lakehouse
License: Proprietary
Publisher: AWS Big Data Blog
Source: https://aws.amazon.com/blogs/big-data/query-across-accounts-and-table-formats-with-multi-catalog-in-amazon-emr/

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runs code: —
network access: —
credentials: —
filesystem access: —
external apis: —

Provenance

Verification: community
Evidence: 1/10 checks · earned community
Stale: Last verified days ago (>180 days)
Source File: data/curated/references/2026-10-09-query-across-accounts-and-table-formats-with-multi-catalog-in-am.yaml

Before you trust this

Limitations: No documented limitations — treat the unknown as unknown, not as safe.
Prerequisites: None declared
Evidence checklist: source reachable: unclaimedmetadata validated: passedlicense reviewed: unclaimedtutorial generated: unclaimedstatic checks passed: unclaimedbuild passed: unclaimedtests passed: unclaimedsmoke passed: unclaimedoutput validated: unclaimedsecurity reviewed: unclaimed

Related in the graph (5)

Delta Lake Documentation (Reference)
Apache Iceberg Documentation (Reference)
Compaction & File-Size Management (Pattern)
Lakehouse Guard (Plugin)
Small files explosion (Runbook)

Computed from shared taxonomy — not curator endorsements.

Roadmap Alignment

Lakehouse (platforms)

This artifact teaches skills for the stages above in the 13-stage Data Engineering roadmap.

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Query across accounts and table formats with multi-catalog in Amazon EMR