docs: BigQuery nested STRUCT support in anomaly tests

[NoyaOffer]

What

Documents BigQuery nested STRUCT support in anomaly tests, shipped in dbt package v0.26.0 (#1012).

column_anomalies and dimension_anomalies can now reference nested STRUCT leaf fields by dotted path on BigQuery (e.g. user.address.city) instead of only top-level columns. The dotted path is preserved in alerts. Fields under a REPEATED (array) ancestor are not supported. all_columns_anomalies does not auto-expand nested STRUCTs.

Changes

• New snippet snippets/data-tests/bigquery-nested-struct-anomalies.mdx — shared <Note> describing the capability + the array limitation.
• column-anomalies.mdx and dimension-anomalies.mdx — render the shared snippet.
• all-columns-anomalies.mdx — tailored note (does not auto-expand nested STRUCTs; points users to a column_anomalies test on the nested field).

Edits to existing pages only — no docs.json nav or features-card change.

Checks

• mintlify broken-links passes (no broken links).

For reviewer

• Confirm the recommended path for monitoring a nested field under all_columns_anomalies (a column_anomalies test on the dotted field vs. an explicit column_name argument). The note currently recommends the former.

🤖 Generated with Claude Code

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