analysis

Type Members

1. 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.

2. trait Catalog extends AnyRef

   An interface for looking up relations by name.

3. trait FunctionRegistry extends AnyRef

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

4. trait HiveTypeCoercion extends AnyRef

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

5. 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.

6. trait OverrideCatalog extends Catalog

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

7. class SimpleCatalog extends Catalog

8. case class Star(table: Option[String], mapFunction: (Attribute) ⇒ Expression = ...) extends Attribute with LeafNode[Expression] with Product with Serializable

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

9. 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.

10. 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.

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

12. case class UnresolvedRelation(databaseName: Option[String], tableName: String, alias: Option[String] = scala.None) extends BaseRelation with Product with Serializable

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