Document ADD COLUMN on continuous aggregates (2.28.0) - #316
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atovpeko merged 4 commits intoJun 12, 2026
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TimescaleDB 2.28.0 (timescale/timescaledb#9825) supports adding a new aggregate to a continuous aggregate in place via ALTER MATERIALIZED VIEW ADD COLUMN ... GENERATED ALWAYS AS (<aggregate>) STORED. Reword the clause-list lead-in so it no longer implies every bullet is a standard PostgreSQL ALTER VIEW clause: aggregates in generated columns are TimescaleDB-specific and not valid in plain PostgreSQL.
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… page Match the page's Samples section, which gives an example for each supported clause (verified against TimescaleDB 2.28.0).
TimescaleDB 2.28.0 (timescale/timescaledb#9825) adds ADD COLUMN on continuous aggregates, so the note stating no schema changes are possible is no longer accurate. Point it at the ALTER MATERIALIZED VIEW reference.
melihmutlu
reviewed
Jun 11, 2026
- Generalize the clause to cover aggregates and GROUP BY columns - Add a GROUP BY-column example - Explain NULL-until-backfill behavior and show force => true refresh Verified against a local 2.29.0-dev build.
melihmutlu
approved these changes
Jun 12, 2026
atovpeko
merged commit Jun 12, 2026
db1d118
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atovpeko1/edu-136-timescale-db-228-release
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ALTER MATERIALIZED VIEW <cagg> ADD COLUMN <name> <type> GENERATED ALWAYS AS (<aggregate>) STORED, added in TimescaleDB 2.28.0 (timescale/timescaledb#9825), on the continuous aggregateALTER MATERIALIZED VIEWreference page.NULLuntil a forced refresh backfills them.ALTER VIEWclause: aggregates in generated columns are TimescaleDB-specific and not valid in plain PostgreSQL.Affected pages
Related Issues
Issue: https://linear.app/tigerdata/issue/EDU-136
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