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Code ReferenceEngine Extension API

Column Generators

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Column generators execute column generation in the Data Designer engine. A generator receives the upstream data needed for its task, returns row or batch data with generated values added, and reports the generation strategy the scheduler should use.

Related pages: column_configs, FileSystemSeedReader Plugins, and Custom Columns.

User-facing column configs inherit from SingleColumnConfig and define a unique column_type discriminator. During compilation, the engine may group related configs into multi-column configs for generators that create sampler or seed columns together.

Generators that operate on a full batch can inherit from ColumnGeneratorFullColumn. Row-oriented non-model generators can inherit from ColumnGeneratorCellByCell. Generators that create initial rows use FromScratchColumnGenerator. Model-backed plugin generators should use ColumnGeneratorWithModelRegistry or ColumnGeneratorWithModel.

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