org.apache.drill.common.expression

Class FieldReference

java.lang.Object

org.apache.drill.common.expression.LogicalExpressionBase

org.apache.drill.common.expression.SchemaPath

org.apache.drill.common.expression.FieldReference

All Implemented Interfaces:

Iterable<LogicalExpression>, LogicalExpression

public class FieldReference
extends SchemaPath

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	FieldReference.De
static class	FieldReference.Se

Field Summary

Fields inherited from class org.apache.drill.common.expression.SchemaPath

DYNAMIC_STAR, STAR_COLUMN

Constructor Summary

Constructors

Constructor and Description
FieldReference(CharSequence value)
FieldReference(CharSequence value, ExpressionPosition pos)
FieldReference(SchemaPath sp)
FieldReference(String value, ExpressionPosition pos, TypeProtos.MajorType dataType)

Method Summary

Modifier and Type	Method and Description
TypeProtos.MajorType	getMajorType()
static FieldReference	getWithQuotedRef(CharSequence safeString) Create a FieldReference given an unquoted name.

Methods inherited from class org.apache.drill.common.expression.SchemaPath

accept, contains, create, equals, getAsNamePart, getAsUnescapedPath, getChild, getChild, getChild, getChild, getCompoundPath, getCompoundPath, getLastSegment, getRootSegment, getRootSegmentPath, getSimplePath, getUnIndexed, hashCode, isArray, isDynamicStar, isLeaf, isSimplePath, iterator, nameEquals, parseFromString, rootName, toExpr, toString

Methods inherited from class org.apache.drill.common.expression.LogicalExpressionBase

getCumulativeCost, getDescription, getPosition, getSelfCost, i

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

FieldReference

public FieldReference(SchemaPath sp)

FieldReference

public FieldReference(CharSequence value)

FieldReference

public FieldReference(CharSequence value,
                      ExpressionPosition pos)

FieldReference

public FieldReference(String value,
                      ExpressionPosition pos,
                      TypeProtos.MajorType dataType)

Method Detail

getWithQuotedRef

public static FieldReference getWithQuotedRef(CharSequence safeString)

Create a FieldReference given an unquoted name. (Note: the name here is a misnomer: the name may have been quoted in SQL, but must be unquoted when passed in here.)

Parameters:

safeString - the unquoted field reference

Returns:

the field reference expression

getMajorType

public TypeProtos.MajorType getMajorType()

Specified by:

getMajorType in interface LogicalExpression

Overrides:

getMajorType in class SchemaPath