Package org.apache.drill.exec.physical.resultSet.project

Class BaseRequestedColumn

java.lang.Object

org.apache.drill.exec.physical.resultSet.project.BaseRequestedColumn

All Implemented Interfaces:

RequestedColumn

Direct Known Subclasses:

RequestedColumnImpl, RequestedWildcardColumn

public abstract class BaseRequestedColumn
extends Object
implements RequestedColumn

Constructor Summary

Constructors

Constructor	Description
BaseRequestedColumn(RequestedTuple parent, String name)

Method Summary

Modifier and Type	Method	Description
protected void	buildName(StringBuilder buf)
String	fullName()	Returns the fully-qualified column name.
boolean	isRoot()
String	name()	The column name as projected.
boolean	nameEquals(String target)	Case-insensitive comparison of the column name.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.drill.exec.physical.resultSet.project.RequestedColumn

arrayDims, hasIndex, hasIndexes, indexes, isArray, isSimple, isTuple, isWildcard, maxIndex, qualifier, tuple

Constructor Details

BaseRequestedColumn

public BaseRequestedColumn(RequestedTuple parent,
 String name)

Method Details

isRoot

public boolean isRoot()

name

public String name()

Description copied from interface: RequestedColumn

The column name as projected. If the same column appears multiple times (as in a[1], A[2], then the case of the first appearance is used.

Specified by:

name in interface RequestedColumn

Returns:

the column name as observed in the project list

fullName

public String fullName()

Description copied from interface: RequestedColumn

Returns the fully-qualified column name. If the column is in the top-level tuple, this is the same as name(). If the column is nested in an array, then this name includes the enclosing columns: a.b.c.

Specified by:

fullName in interface RequestedColumn

Returns:

the full name with enclosing map prefixes, if any

buildName

protected void buildName(StringBuilder buf)

nameEquals

public boolean nameEquals(String target)

Description copied from interface: RequestedColumn

Case-insensitive comparison of the column name.

Specified by:

nameEquals in interface RequestedColumn