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  • 1 commit
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Commits on Aug 2, 2026

  1. DRILL-8552: Add Storage Plugin for Apache Accumulo 

    This PR introduces a new storage plugin for Apache Accumulo, enabling
Drill to query Accumulo tables using standard SQL.

Features:
- Full SQL query support for Accumulo tables
- Dynamic schema discovery (column families as MAPs)
- Filter pushdown (row key ranges to Accumulo Range scans)
- Projection pushdown (column family/qualifier selection)
- Limit pushdown (early scan termination)
- Sort pushdown (ORDER BY row_key uses natural ordering)

Authentication modes:
- PASSWORD: Username/password authentication
- KERBEROS + SHARED_USER: Service principal for all queries
- KERBEROS + USER_IMPERSONATION: Delegation tokens for per-user identity
- USER_TRANSLATION: Per-user Accumulo credentials from CredentialsProvider

Key components:
- AccumuloStoragePlugin/Config: Plugin configuration and lifecycle
- AccumuloConnectionManager: Centralized auth and client management
- AccumuloGroupScan/SubScan: Distributed scan planning
- AccumuloRecordReader: Data reading and vector population
- AccumuloPushFilterIntoScan: Filter pushdown optimizer rule
- AccumuloPushSortIntoScan: Sort pushdown optimizer rule
- DelegationTokenInfo: Serializable token wrapper for distributed execution

Tested with Accumulo 2.1.4 LTS.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
    @cgivre @claude
    cgivre and claude committed Aug 2, 2026
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