Package org.h2.command.query

Class SelectUnion.LazyResultUnion

java.lang.Object

org.h2.result.FetchedResult

org.h2.result.LazyResult

org.h2.command.query.SelectUnion.LazyResultUnion

All Implemented Interfaces:

AutoCloseable, ResultInterface

Enclosing class:

SelectUnion

private final class SelectUnion.LazyResultUnion
extends LazyResult

Lazy execution for this union.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) int	columnCount
(package private) ResultInterface	l
(package private) boolean	leftDone
(package private) ResultInterface	r
(package private) boolean	rightDone

Constructor Summary

Constructors

Constructor	Description
LazyResultUnion(Expression[] expressions, int columnCount)

Method Summary

Modifier and Type	Method	Description
void	close()	Close the result and delete any temporary files
protected Value[]	fetchNextRow()	Fetch next row or null if none available.
int	getVisibleColumnCount()	Get the number of visible columns.
void	reset()	Go to the beginning of the result, that means before the first row.

Methods inherited from class org.h2.result.LazyResult

getAlias, getColumnName, getColumnType, getFetchSize, getNullable, getRowCount, getSchemaName, getTableName, hasNext, isClosed, isIdentity, isLazy, setFetchSize, setLimit, skip, skipNextRow

Methods inherited from class org.h2.result.FetchedResult

createShallowCopy, currentRow, getRowId, isAfterLast, needToClose, next

Methods inherited from class java.lang.Object

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

Field Details

columnCount

int columnCount

l

ResultInterface l

r

ResultInterface r

leftDone

boolean leftDone

rightDone

boolean rightDone

Constructor Details

LazyResultUnion

LazyResultUnion(Expression[] expressions,
 int columnCount)

Method Details

getVisibleColumnCount

public int getVisibleColumnCount()

Description copied from interface: ResultInterface

Get the number of visible columns. More columns may exist internally for sorting or grouping.

Returns:

the number of columns

fetchNextRow

protected Value[] fetchNextRow()

Description copied from class: LazyResult

Fetch next row or null if none available.

Specified by:

fetchNextRow in class LazyResult

Returns:

next row or null

close

public void close()

Description copied from interface: ResultInterface

Close the result and delete any temporary files

Specified by:

close in interface AutoCloseable

Specified by:

close in interface ResultInterface

Overrides:

close in class LazyResult

reset

public void reset()

Description copied from interface: ResultInterface

Go to the beginning of the result, that means before the first row.

Specified by:

reset in interface ResultInterface

Overrides:

reset in class LazyResult