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# Supported Spark Operators

The following Spark operators are currently replaced with native versions. Query stages that contain any operators
not supported by Comet will fall back to regular Spark execution.

| Operator                          | Spark-Compatible? | Compatibility Notes                                                                                                |
| --------------------------------- | ----------------- | ------------------------------------------------------------------------------------------------------------------ |
| BatchScanExec                     | Yes               | Supports Parquet files and Apache Iceberg Parquet scans. See the [Comet Compatibility Guide] for more information. |
| BroadcastExchangeExec             | Yes               |                                                                                                                    |
| BroadcastHashJoinExec             | Yes               |                                                                                                                    |
| ExpandExec                        | Yes               |                                                                                                                    |
| FileSourceScanExec                | Yes               | Supports Parquet files. See the [Comet Compatibility Guide] for more information.                                  |
| FilterExec                        | Yes               |                                                                                                                    |
| GenerateExec                      | Yes               | Supports `explode` generator only.                                                                                 |
| GlobalLimitExec                   | Yes               |                                                                                                                    |
| HashAggregateExec                 | Yes               |                                                                                                                    |
| InsertIntoHadoopFsRelationCommand | No                | Experimental support for native Parquet writes. Disabled by default.                                               |
| LocalLimitExec                    | Yes               |                                                                                                                    |
| LocalTableScanExec                | No                | Experimental and disabled by default.                                                                              |
| ObjectHashAggregateExec           | Yes               | Supports a limited number of aggregates, such as `bloom_filter_agg`.                                               |
| ProjectExec                       | Yes               |                                                                                                                    |
| ShuffleExchangeExec               | Yes               |                                                                                                                    |
| ShuffledHashJoinExec              | Yes               |                                                                                                                    |
| SortExec                          | Yes               |                                                                                                                    |
| SortMergeJoinExec                 | Yes               |                                                                                                                    |
| UnionExec                         | Yes               |                                                                                                                    |
| WindowExec                        | No                | Disabled by default due to known correctness issues.                                                               |

[Comet Compatibility Guide]: compatibility.md
