materialized_view_config_changeset: Failed to deserialize…

Error message

materialized_view_config_changeset: Failed to deserialize RedshiftMaterializedViewConfig: {e}

What it means

Immediately after parsing the describe results, the Redshift branch converts them into a RedshiftMaterializedViewConfig via try_from. If the describe results cannot be interpreted as a Redshift materialized-view config, this SerdeDeserializeError is raised. It indicates the remote state lacks fields required for changeset computation (e.g. autorefresh, dist, sort keys).

Solutions

Check the nested error text for the missing/invalid field and correct the remote state source.
Re-describe the materialized view to regenerate accurate DescribeMaterializedViewResults.
Verify adapter and dbt version parity so the config struct expectations match.
If the view was created outside dbt, ensure its properties match what the adapter expects.

Defensive patterns

Strategy: validation

Validate before calling

# Confirm required config attributes exist before changeset computation
required = ['autorefresh', 'dist', 'sortkind', 'sortkey']
if any(remote_state.get(k) is None for k in required):
    re_describe(relation)

Type guard

fn is_redshift_mv_config(r: &DescribeMaterializedViewResults) -> bool {
    RedshiftMaterializedViewConfig::try_from(r.clone()).is_ok()
}

Try / catch

match RedshiftMaterializedViewConfig::try_from(describe_results) {
    Ok(cfg) => compute_changeset(cfg),
    Err(e) => { warn_and_full_refresh(); }
}

Prevention

Re-describe the materialized view instead of trusting cached results
Keep adapter versions aligned with warehouse behavior
Manage out-of-dbt views so required properties are present

When it happens

Trigger: Providing a DescribeMaterializedViewResults whose contents cannot yield a RedshiftMaterializedViewConfig (missing or malformed config fields in the remote state).

Common situations: Remote state captured on a warehouse whose materialized view lacks expected attributes, results from a different adapter version, or corrupted/stale cached state.

Understand the failure class

Background: Schema validation failed / invalid input schema: payload rejected because its shape doesn't match the expected schema — this error's family across 28 libraries.

Related errors

AI-assisted analysis of dbt-labs/dbt-core@0267ce9170 (2026-09-07). Data as JSON: /api/errors/6b7850481f8ad3e2. Report an issue: GitHub.

Appendix: source

Thrown at crates/dbt-adapter/src/relation/relation_impl.rs:1255

        use AdapterType::*;
        match self.adapter_type {
            // FIXME(serramatutu): port over to RelationConfig v2
            Redshift => {
                let remote_state = DescribeMaterializedViewResults::try_from(
                    remote_state_value,
                    )
                    .map_err(|e| {
                        minijinja::Error::new(
                            minijinja::ErrorKind::SerdeDeserializeError,
                            format!(
                                "from_config: Failed to serialized DescribeMaterializedViewResults: {e}"
                            )
                        )
                    })?;

                let remote_state = RedshiftMaterializedViewConfig::try_from(remote_state)
                    .map_err(|e| {
                        minijinja::Error::new(
                            minijinja::ErrorKind::SerdeDeserializeError,
                            format!(
                                "materialized_view_config_changeset: Failed to deserialize RedshiftMaterializedViewConfig: {e}"
                            ),
                        )
                    })?;

                let local_config = node_value_to_redshift_materialized_view(local_config_value)?;

                let changeset =
                    RedshiftMaterializedViewConfigChangeset::new(remote_state, local_config);

                if changeset.has_changes() {
                    Ok(Value::from_object(changeset))
                } else {
                    Ok(Value::from(None::<()>))
                }
            }

View on GitHub (pinned to 0267ce9170)