analysis

Type Members

1. implicit class AnalysisErrorAt extends AnyRef

2. class Analyzer extends RuleExecutor[LogicalPlan] with HiveTypeCoercion

   Provides a logical query plan analyzer, which translates UnresolvedAttributes and UnresolvedRelations into fully typed objects using information in a schema Catalog and a FunctionRegistry.

3. trait Catalog extends AnyRef

   An interface for looking up relations by name.

4. class CheckAnalysis extends AnyRef

   Throws user facing errors when passed invalid queries that fail to analyze.

5. trait FunctionRegistry extends AnyRef

   A catalog for looking up user defined functions, used by an Analyzer.

6. trait HiveTypeCoercion extends AnyRef

   A collection of Rules that can be used to coerce differing types that participate in operations into compatible ones.

7. case class MultiAlias(child: Expression, names: Seq[String]) extends Attribute with UnaryNode[Expression] with Product with Serializable

   Used to assign new names to Generator's output, such as hive udtf.

8. trait MultiInstanceRelation extends AnyRef

   A trait that should be mixed into query operators where an single instance might appear multiple times in a logical query plan.

9. class NoSuchTableException extends Exception

   Thrown by a catalog when a table cannot be found.

10. trait OverrideCatalog extends Catalog

    A trait that can be mixed in with other Catalogs allowing specific tables to be overridden with new logical plans.

11. trait OverrideFunctionRegistry extends FunctionRegistry

12. case class ResolvedStar(expressions: Seq[NamedExpression]) extends Attribute with Star with Product with Serializable

    Represents all the resolved input attributes to a given relational operator.

13. type Resolver = (String, String) ⇒ Boolean

    Resolver should return true if the first string refers to the same entity as the second string.

    Resolver should return true if the first string refers to the same entity as the second string. For example, by using case insensitive equality.

14. class SimpleCatalog extends Catalog

15. class SimpleFunctionRegistry extends FunctionRegistry

16. trait Star extends Attribute with LeafNode[Expression]

    Represents all of the input attributes to a given relational operator, for example in "SELECT * FROM .

17. class StringKeyHashMap[T] extends AnyRef

18. case class UnresolvedAttribute(name: String) extends Attribute with LeafNode[Expression] with Product with Serializable

    Holds the name of an attribute that has yet to be resolved.

19. class UnresolvedException[TreeType <: TreeNode[_]] extends TreeNodeException[TreeType]

    Thrown when an invalid attempt is made to access a property of a tree that has yet to be fully resolved.

20. case class UnresolvedFunction(name: String, children: Seq[Expression]) extends Expression with Product with Serializable

21. case class UnresolvedGetField(child: Expression, fieldName: String) extends UnaryExpression with Product with Serializable

22. case class UnresolvedRelation(tableIdentifier: Seq[String], alias: Option[String] = scala.None) extends LeafNode with Product with Serializable

    Holds the name of a relation that has yet to be looked up in a Catalog.

23. case class UnresolvedStar(table: Option[String]) extends Attribute with Star with Product with Serializable

    Represents all of the input attributes to a given relational operator, for example in "SELECT * FROM .