Package org.apache.drill.exec.expr.fn.impl

Class SchemaFunctions

java.lang.Object

org.apache.drill.exec.expr.fn.impl.SchemaFunctions

public class SchemaFunctions
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	SchemaFunctions.MergeNullableSchemaFunction	Aggregate function which accepts VarChar column with string representations of TupleMetadata and returns string representation of TupleMetadata with merged schema.
static class	SchemaFunctions.MergeSchemaFunction
static class	SchemaFunctions.SchemaFunction	Aggregate function which infers schema from incoming data and returns string representation of TupleMetadata with incoming schema.

Constructor Summary

Constructors

Constructor	Description
SchemaFunctions()

Method Summary

Modifier and Type	Method	Description
static TupleMetadata	getTupleMetadata(String serialized)	Wraps static method from TupleMetadata to avoid IncompatibleClassChangeError for JDK 9+.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SchemaFunctions

public SchemaFunctions()

Method Details

getTupleMetadata

public static TupleMetadata getTupleMetadata(String serialized)

Wraps static method from TupleMetadata to avoid IncompatibleClassChangeError for JDK 9+. .

Parameters:

serialized - tuple metadata in JSON string representation

Returns:

TupleMetadata instance