Package org.apache.flink.table.expressions.resolver.rules

Interface ResolverRule.ResolutionContext

Enclosing interface:
ResolverRule
@Internal public static interface ResolverRule.ResolutionContext
Contextual information that can be used during application of the rule. E.g. one can access fields in inputs by name etc.

  • Method Details

    • configuration

      org.apache.flink.configuration.ReadableConfig configuration()
      Access to configuration.

    • userClassLoader

      ClassLoader userClassLoader()
      Access to user classloader.

    • referenceLookup

      FieldReferenceLookup referenceLookup()
      Access to available FieldReferenceExpression in inputs.

    • tableLookup

      TableReferenceLookup tableLookup()
      Access to available TableReferenceExpression.

    • functionLookup

      FunctionLookup functionLookup()
      Access to available FunctionDefinitions.

    • typeFactory

      org.apache.flink.table.catalog.DataTypeFactory typeFactory()
      Access to DataTypeFactory.

    • sqlExpressionResolver

      SqlExpressionResolver sqlExpressionResolver()
      Translates a SQL expression to ResolvedExpression.

    • postResolutionFactory

      ExpressionResolver.PostResolverFactory postResolutionFactory()
      Enables the creation of resolved expressions for transformations after the actual resolution.

    • getLocalReference

      Optional<LocalReferenceExpression> getLocalReference(String alias)
      Access to available local references.

    • getLocalReferences

      List<LocalReferenceExpression> getLocalReferences()
      Access to available local references.

    • getOutputDataType

      Optional<org.apache.flink.table.types.DataType> getOutputDataType()
      Access to the expected top-level output data type.

    • getOverWindow

      Optional<LocalOverWindow> getOverWindow(org.apache.flink.table.expressions.Expression alias)
      Access to available local over windows.

    • isGroupedAggregation

      boolean isGroupedAggregation()
      Whether the expression is evaluated for a grouped aggregation.