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| |
| # Status |
| |
| ## General |
| |
| - [x] SQL Parser |
| - [x] SQL Query Planner |
| - [x] Query Optimizer |
| - [x] Constant folding |
| - [x] Join Reordering |
| - [x] Limit Pushdown |
| - [x] Projection push down |
| - [x] Predicate push down |
| - [x] Type coercion |
| - [x] Parallel query execution |
| |
| ## SQL Support |
| |
| - [x] Projection (`SELECT`) |
| - [x] Filter (`WHERE`) |
| - [x] Filter post-aggregate (`HAVING`) |
| - [x] Sorting (`ORDER BY`) |
| - [x] Limit (`LIMIT` |
| - [x] Aggregate (`GROUP BY`) |
| - [x] cast /try_cast |
| - [x] [`VALUES` lists](https://www.postgresql.org/docs/current/queries-values.html) |
| - [x] [String Functions](./scalar_functions.md#string-functions) |
| - [x] [Conditional Functions](./scalar_functions.md#conditional-functions) |
| - [x] [Time and Date Functions](./scalar_functions.md#time-and-date-functions) |
| - [x] [Math Functions](./scalar_functions.md#math-functions) |
| - [x] [Aggregate Functions](./aggregate_functions.md) (`SUM`, `MEDIAN`, and many more) |
| - [x] Schema Queries |
| - [x] `SHOW TABLES` |
| - [x] `SHOW COLUMNS FROM <table/view>` |
| - [x] `SHOW CREATE TABLE <view>` |
| - [x] Basic SQL [Information Schema](./information_schema.md) (`TABLES`, `VIEWS`, `COLUMNS`) |
| - [ ] Full SQL [Information Schema](./information_schema.md) support |
| - [ ] Support for nested types (`ARRAY`/`LIST` and `STRUCT`. See [#2326](https://github.com/apache/arrow-datafusion/issues/2326) for details) |
| - [x] Read support |
| - [x] Write support |
| - [x] Field access (`col['field']` and [`col[1]`]) |
| - [x] [Array Functions](./scalar_functions.md#array-functions) |
| - [ ] [Struct Functions](./scalar_functions.md#struct-functions) |
| - [x] `struct` |
| - [ ] [Postgres JSON operators](https://github.com/apache/arrow-datafusion/issues/6631) (`->`, `->>`, etc.) |
| - [x] Subqueries |
| - [x] Common Table Expressions (CTE) |
| - [x] Set Operations (`UNION [ALL]`, `INTERSECT [ALL]`, `EXCEPT[ALL]`) |
| - [x] Joins (`INNER`, `LEFT`, `RIGHT`, `FULL`, `CROSS`) |
| - [x] Window Functions |
| - [x] Empty (`OVER()`) |
| - [x] Partitioning and ordering: (`OVER(PARTITION BY <..> ORDER BY <..>)`) |
| - [x] Custom Window (`ORDER BY time ROWS BETWEEN 2 PRECEDING AND 0 FOLLOWING)`) |
| - [x] User Defined Window and Aggregate Functions |
| - [x] Catalogs |
| - [x] Schemas (`CREATE / DROP SCHEMA`) |
| - [x] Tables (`CREATE / DROP TABLE`, `CREATE TABLE AS SELECT`) |
| - [ ] Data Insert |
| - [x] `INSERT INTO` |
| - [ ] `COPY .. INTO ..` |
| - [x] CSV |
| - [ ] JSON |
| - [ ] Parquet |
| - [ ] Avro |
| |
| ## Runtime |
| |
| - [x] Streaming Grouping |
| - [x] Streaming Window Evaluation |
| - [x] Memory limits enforced |
| - [x] Spilling (to disk) Sort |
| - [ ] Spilling (to disk) Grouping |
| - [ ] Spilling (to disk) Joins |
| |
| ## Data Sources |
| |
| In addition to allowing arbitrary datasources via the `TableProvider` |
| trait, DataFusion includes built in support for the following formats: |
| |
| - [x] CSV |
| - [x] Parquet (for all primitive and nested types) |
| - [x] JSON |
| - [x] Avro |
| - [x] Arrow |
