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← Back to schema changes overview We are standardizing how Beacon Chain tables expose epoch and slot identifiers so they match our naming on newer networks (for example Hoodi) and are easier to use in joins and analytics. Last published: April 8, 2026

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What’s changing

New columns EPOCH_NUMBER and SLOT_NUMBER are available alongside the legacy EPOCH and SLOT columns on April 9, 2026.
Table (fully qualified)Legacy columns (dropped April 20, 2026)New columns
beacon.raw.validator_dutiesEPOCH, SLOTEPOCH_NUMBER, SLOT_NUMBER
beacon.raw.ideal_rewardsEPOCHEPOCH_NUMBER
beacon.raw.total_rewardsEPOCHEPOCH_NUMBER
Values in EPOCH_NUMBER and SLOT_NUMBER match the same underlying data as EPOCH and SLOT before the drop.
April 20, 2026 — legacy columns removedOn April 20, 2026, we will drop the legacy identifiers:
  • EPOCH — removed from beacon.raw.validator_duties, beacon.raw.ideal_rewards, and beacon.raw.total_rewards
  • SLOT — removed from beacon.raw.validator_duties only
After that date, use EPOCH_NUMBER and SLOT_NUMBER only.

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Timeline

DateMilestone
Effective by April 9, 2026New columns EPOCH_NUMBER and SLOT_NUMBER are available alongside EPOCH and SLOT (rollout may be staged by environment).
April 17, 2026Please complete migration — Move queries, saved reports, models, and dashboards to EPOCH_NUMBER and SLOT_NUMBER (instead of EPOCH and SLOT) everywhere you control the logic, before the legacy columns are removed.
April 20, 2026Breaking change: Legacy columns EPOCH and SLOT are dropped (see What’s changing). Queries that still reference them will fail until updated.

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What this means for you

  • Until April 20, 2026: Queries that use EPOCH or SLOT continue to work; migrate in parallel using EPOCH_NUMBER / SLOT_NUMBER.
  • From April 20, 2026: EPOCH and SLOT will no longer exist on these tables — you must use EPOCH_NUMBER and SLOT_NUMBER.
  • Recommended path: Prefer EPOCH_NUMBER and SLOT_NUMBER in all new or updated queries and dashboards, and complete rewrites of existing logic by April 17, 2026 (see Timeline).

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Suggested migration (at your pace)

HorizonAction
Short termInventory uses of EPOCH and SLOT; test with EPOCH_NUMBER / SLOT_NUMBER in parallel.
By April 17, 2026Switch references from EPOCH → EPOCH_NUMBER and SLOT → SLOT_NUMBER, validate results, and deploy.
April 20, 2026Legacy columns EPOCH and SLOT are removed — no further action possible except using the new column names.

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Questions or support

If you need help mapping queries or BI models to the new names, contact Allium Support or your usual account channel.