org.apache.drill.exec.planner.logical

Class FieldsReWriterUtil

java.lang.Object

org.apache.drill.exec.planner.logical.FieldsReWriterUtil

public class FieldsReWriterUtil
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	FieldsReWriterUtil.DesiredField Holder class to store field information (name and type) with the list of nodes this field is used in.
static class	FieldsReWriterUtil.FieldsReWriter Replaces original node with provided in mapper, otherwise returns original node.

Constructor Summary

Constructors

Constructor and Description
FieldsReWriterUtil()

Method Summary

Modifier and Type	Method and Description
static String	getFieldNameFromItemStarField(org.apache.calcite.rex.RexCall rexCall, List<String> fieldNames) Checks if operator call is using item star field.

Methods inherited from class java.lang.Object

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

Constructor Detail

FieldsReWriterUtil

public FieldsReWriterUtil()

Method Detail

getFieldNameFromItemStarField

public static String getFieldNameFromItemStarField(org.apache.calcite.rex.RexCall rexCall,
                                                   List<String> fieldNames)

Checks if operator call is using item star field. Will return field name if true. null otherwise.

Parameters:

rexCall - operator call

fieldNames - list of field names

Returns:

field name, null otherwise