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axellpadilla merged 1 commit into from
Jun 25, 2026
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Add CHANGELOG entries for v1.10.1 release #724

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35 changes: 26 additions & 9 deletions CHANGELOG.md
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#### Features

- Add `dbt_sqlserver_enable_safe_type_expansion` behaviour flag to allow safe column type widening during schema expansion: `varchar` → `nvarchar`, integer family promotions (`bit` → `tinyint` → `smallint` → `int` → `bigint`), and `numeric`/`decimal` precision/scale upgrades. Gated by the per-model `column_type_expansion_max_rows` config (default 1,000,000 rows). See [#699](https://github.com/dbt-msft/dbt-sqlserver/issues/699).
- Add Postgres-style `indexes` model config for tables, incrementals, seeds and snapshots, covering most `CREATE INDEX` options. [#535](https://github.com/dbt-msft/dbt-sqlserver/issues/535)
- Index names are deterministic definition hashes (`dbt_idx_` prefix); creation is idempotent and unchanged definitions are never rebuilt.
- Reconcile indexes against the config on incremental, DML-refresh and snapshot runs, applied as one atomic batch. Constraint-backing, legacy post-hook and `as_columnstore` indexes are never dropped.
- Index introspection reads the catalog lock-free throughout (`NOLOCK` on every `sys` view, not just `sys.indexes`), so it no longer queues behind concurrent index DDL.
- Add `drop_unmanaged_indexes` config (`false` (default) / `warn` / `true`) for indexes dbt didn't create.
- Validate cross-index config conflicts (multiple clustered indexes, clustered vs `as_columnstore`).
- Document the minimum supported SQL Server version (2017). Partitioning, `XML_COMPRESSION` and ordered columnstore are not yet expressible in the `indexes` config.
- Add `dbt_sqlserver_enable_safe_type_expansion` behaviour flag to allow safe column type widening during schema expansion: `varchar` → `nvarchar`, integer family promotions (`bit` → `tinyint` → `smallint` → `int` → `bigint`), and `numeric`/`decimal` precision/scale upgrades. Gated by the per-model `column_type_expansion_max_rows` config (default 1,000,000 rows). [#699](https://github.com/dbt-msft/dbt-sqlserver/issues/699).
- Add `prefer_single_alter_column` model config to use a single `ALTER COLUMN` statement instead of the add+update+drop+rename pattern when altering column types on tables.
- Add `string_type_instance()` to preserve the NVARCHAR/NCHAR type family during column expansion, fixing incorrect promotion of NVARCHAR/NCHAR to VARCHAR.
- Add `tinyint` and `bit` to the `is_integer()` type list for correct type detection.
- Add `dbt_sqlserver_use_dbt_transactions` flag for proper T-SQL `BEGIN TRAN`/`COMMIT`/`ROLLBACK` transaction handling. When enabled, operations use real server-side transactions instead of the default autocommit mode. [#708](https://github.com/dbt-msft/dbt-sqlserver/issues/708)
- Implement relation and column comment persistence via `persist_docs`. [#289](https://github.com/dbt-msft/dbt-sqlserver/issues/289)
- Add optional `mssql-python` connection backend alongside the default `pyodbc` backend. [#681](https://github.com/dbt-msft/dbt-sqlserver/issues/681)

#### Bugfixes

- Fix unit tests with empty fixtures (`rows: []`) generating invalid `limit 0` syntax; emit `top 0` instead. Also fix `get_columns_in_query()` for queries starting with a CTE, which broke unit tests with an empty `expect` block; such queries are now described via `sp_describe_first_result_set` instead of being executed. [#698](https://github.com/dbt-msft/dbt-sqlserver/issues/698)
- Fix catalog generation for NVARCHAR/NCHAR columns: use `user_type_id` instead of `system_type_id` in catalog.sql, preventing them from appearing as `SYSNAME` in `dbt docs`. [#637](https://github.com/dbt-msft/dbt-sqlserver/issues/637)
- Fix `varchar(max)` / `nvarchar(max)` columns being incorrectly treated as size `-1` during type expansion, preventing `varchar(max)` → `varchar(100)` narrowing and properly allowing `varchar(100)` → `varchar(max)` expansion.
- Fix seed table ingestion of empty numeric cells by inlining `null` literals instead of binding parameters. [#425](https://github.com/dbt-msft/dbt-sqlserver/issues/425)
- Guard `run_hooks` commit with `@@trancount` check for autocommit safety when running post-hooks. [#444](https://github.com/dbt-msft/dbt-sqlserver/issues/444)
- Fix `columnstore IF EXISTS` guard to check `object_id('schema.table')` correctly.
- Escape single quotes in `query_tag` before building `OPTION (LABEL)` clause.
- Map Python `float` to SQL Server `float`, not `bigint`.
- Set default port to `1433` (instead of Postgres `5432`) in `dbt init` profile template.
- Make `drop_schema_name` usable again. [#563](https://github.com/dbt-msft/dbt-sqlserver/issues/563)
- Raise `DbtRuntimeError` instead of `ValueError` for missing access token.

#### Features
#### Under the hood

- Add Postgres-style `indexes` model config for tables, incrementals, seeds and snapshots, covering most `CREATE INDEX` options. [#535](https://github.com/dbt-msft/dbt-sqlserver/issues/535)
- Index names are deterministic definition hashes (`dbt_idx_` prefix); creation is idempotent and unchanged definitions are never rebuilt.
- Reconcile indexes against the config on incremental, DML-refresh and snapshot runs, applied as one atomic batch. Constraint-backing, legacy post-hook and `as_columnstore` indexes are never dropped.
- Index introspection reads the catalog lock-free throughout (`NOLOCK` on every `sys` view, not just `sys.indexes`), so it no longer queues behind concurrent index DDL.
- Add `drop_unmanaged_indexes` config (`false` (default) / `warn` / `true`) for indexes dbt didn't create.
- Validate cross-index config conflicts (multiple clustered indexes, clustered vs `as_columnstore`).
- Document the minimum supported SQL Server version (2017). Partitioning, `XML_COMPRESSION` and ordered columnstore are not yet expressible in the `indexes` config.
- Consolidate linting tooling (isort, flake8, pycln, absolufy-imports) into Ruff. [#707](https://github.com/dbt-msft/dbt-sqlserver/issues/707)
- Drop Python 3.9 from publish-docker CI matrix.
- Remove dead clone macro and unused view scaffolding variable.
- Standardise devcontainer ODBC environment setup. [#722](https://github.com/dbt-msft/dbt-sqlserver/issues/722)
- Disable dbt telemetry and version check in test environment.
- Add `pytest-cov` and fix dead `from_dict` override found by coverage.
- Bump pip and GitHub Actions dependencies.

### v1.10.0

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