Package org.apache.flink.table.planner.connectors

Interface TransformationScanProvider

All Superinterfaces:
org.apache.flink.table.connector.ParallelismProvider, org.apache.flink.table.connector.source.ScanTableSource.ScanRuntimeProvider
@Internal public interface TransformationScanProvider extends org.apache.flink.table.connector.source.ScanTableSource.ScanRuntimeProvider, org.apache.flink.table.connector.ParallelismProvider
Provider that produces a Transformation as a runtime implementation for ScanTableSource.

Note: This provider is only meant for advanced connector developers. Usually, a source should consist of a single entity expressed via InputFormatProvider, SourceFunctionProvider, or SourceProvider.

  • Method Summary

    Modifier and Type
    Method
    Description
    org.apache.flink.api.dag.Transformation<org.apache.flink.table.data.RowData>
    createTransformation(org.apache.flink.table.connector.ProviderContext providerContext)
    Creates a Transformation instance.

    Methods inherited from interface org.apache.flink.table.connector.ParallelismProvider

    getParallelism

    Methods inherited from interface org.apache.flink.table.connector.source.ScanTableSource.ScanRuntimeProvider

    isBounded

  • Method Details

    • createTransformation

      org.apache.flink.api.dag.Transformation<org.apache.flink.table.data.RowData> createTransformation(org.apache.flink.table.connector.ProviderContext providerContext)
      Creates a Transformation instance.

      Note: If the CompiledPlan feature should be supported, this method MUST set a unique identifier for each transformation/operator in the data stream. This enables stateful Flink version upgrades for streaming jobs. The identifier is used to map state back from a savepoint to an actual operator in the topology. The framework can generate topology-wide unique identifiers with ProviderContext.generateUid(String).

      See Also:
      • Transformation.setUid(String)