internal

Type Members

1. abstract class BaseSessionStateBuilder extends AnyRef

   

   Builder class that coordinates construction of a new SessionState.

   Builder class that coordinates construction of a new SessionState.

   The builder explicitly defines all components needed by the session state, and creates a session state when build is called. Components should only be initialized once. This is not a problem for most components as they are only used in the build function. However some components (conf, catalog, functionRegistry, experimentalMethods & sqlParser) are as dependencies for other components and are shared as a result. These components are defined as lazy vals to make sure the component is created only once.

   A developer can modify the builder by providing custom versions of components, or by using the hooks provided for the analyzer, optimizer & planner. There are some dependencies between the components (they are documented per dependency), a developer should respect these when making modifications in order to prevent initialization problems.

   A parent SessionState can be used to initialize the new SessionState. The new session state will clone the parent sessions state's conf, functionRegistry, experimentalMethods and catalog fields. Note that the state is cloned when build is called, and not before.

   Annotations

   @Experimental() @Unstable()

2. class CatalogImpl extends Catalog

   

   Internal implementation of the user-facing Catalog.

3. case class HiveSerDe(inputFormat: Option[String] = None, outputFormat: Option[String] = None, serde: Option[String] = None) extends Product with Serializable

   

4. class SessionResourceLoader extends FunctionResourceLoader

   

   Session shared FunctionResourceLoader.

   Session shared FunctionResourceLoader.

   Annotations

   @Unstable()

5. class SessionStateBuilder extends BaseSessionStateBuilder

   

   Concrete implementation of a SessionStateBuilder.

   Concrete implementation of a SessionStateBuilder.

   Annotations

   @Experimental() @Unstable()

6. class VariableSubstitution extends AnyRef

   

   A helper class that enables substitution using syntax like ${var}, ${system:var} and ${env:var}.

   A helper class that enables substitution using syntax like ${var}, ${system:var} and ${env:var}.

   Variable substitution is controlled by SQLConf.variableSubstituteEnabled.