org.h2.mvstore.db

Class MVTempResult

java.lang.Object

org.h2.mvstore.db.MVTempResult

All Implemented Interfaces:

ResultExternal

public abstract class MVTempResult
extends java.lang.Object
implements ResultExternal

Temporary result.

A separate MVStore in a temporary file is used for each result. The file is removed when this result and all its copies are closed. TempFileDeleter is also used to delete this file if results are not closed properly.

Method Summary

Modifier and Type	Method and Description
int	addRows(java.util.Collection<Value[]> rows) Add a number of rows to the result.
void	close() Close this object and delete the temporary file.
static ResultExternal	of(Database database, Expression[] expressions, boolean distinct, int[] distinctIndexes, int visibleColumnCount, int resultColumnCount, SortOrder sort) Creates MVStore-based temporary result.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.h2.result.ResultExternal

addRow, contains, createShallowCopy, next, removeRow, reset

Method Detail

of

public static ResultExternal of(Database database,
                                Expression[] expressions,
                                boolean distinct,
                                int[] distinctIndexes,
                                int visibleColumnCount,
                                int resultColumnCount,
                                SortOrder sort)

Creates MVStore-based temporary result.

Parameters:

database - database

expressions - expressions

distinct - is output distinct

distinctIndexes - indexes of distinct columns for DISTINCT ON results

visibleColumnCount - count of visible columns

resultColumnCount - the number of columns including visible columns and additional virtual columns for ORDER BY and DISTINCT ON clauses

sort - sort order, or null

Returns:

temporary result

addRows

public int addRows(java.util.Collection<Value[]> rows)

Description copied from interface: ResultExternal

Add a number of rows to the result.

Specified by:

addRows in interface ResultExternal

Parameters:

rows - the list of rows to add

Returns:

the new number of rows in this object

close

public void close()

Description copied from interface: ResultExternal

Close this object and delete the temporary file.

Specified by:

close in interface ResultExternal