Package org.h2.result

Class SimpleResult

java.lang.Object

org.h2.result.SimpleResult

All Implemented Interfaces:

AutoCloseable, ResultInterface, ResultTarget

public class SimpleResult
extends Object
implements ResultInterface, ResultTarget

Simple in-memory result.

Constructor Summary

Constructors

Constructor	Description
SimpleResult()	Creates new instance of simple result.
SimpleResult(String schemaName, String tableName)	Creates new instance of simple result.

Method Summary

Modifier and Type	Method	Description
void	addColumn(String alias, String columnName, int columnType, long columnPrecision, int columnScale)	Add column to the result.
void	addColumn(String alias, String columnName, TypeInfo columnType)	Add column to the result.
void	addColumn(String columnName, TypeInfo columnType)	Add column to the result.
void	addRow(Value... values)	Add the row to the result set.
void	close()	Close the result and delete any temporary files
SimpleResult	createShallowCopy(Session targetSession)	Create a shallow copy of the result set.
Value[]	currentRow()	Get the current row.
String	getAlias(int i)	Get the column alias name for the column.
String	getColumnName(int i)	Get the column name.
TypeInfo	getColumnType(int i)	Get the column data type.
int	getFetchSize()	Get the current fetch size for this result set.
int	getNullable(int i)	Check if this column is nullable.
long	getRowCount()	Get the number of rows in this object.
long	getRowId()	Get the current row id, starting with 0.
String	getSchemaName(int i)	Get the schema name for the column, if one exists.
String	getTableName(int i)	Get the table name for the column, if one exists.
int	getVisibleColumnCount()	Get the number of visible columns.
boolean	hasNext()	Check if this result has more rows to fetch.
boolean	isAfterLast()	Check if the current position is after last row.
boolean	isClosed()	Check if this result set is closed.
boolean	isIdentity(int i)	Check if this is an identity column.
boolean	isLazy()	Check if this a lazy execution result.
void	limitsWereApplied()	A hint that sorting, offset and limit may be ignored by this result because they were applied during the query.
boolean	needToClose()	Check if this result set should be closed, for example because it is buffered using a temporary file.
boolean	next()	Go to the next row.
void	reset()	Go to the beginning of the result, that means before the first row.
void	setFetchSize(int fetchSize)	Set the fetch size for this result set.
void	sortRows(Comparator<? super Value[]> comparator)	Sort rows in the list.

Methods inherited from class java.lang.Object

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

Constructor Details

SimpleResult

public SimpleResult()

Creates new instance of simple result.

SimpleResult

public SimpleResult(String schemaName,
 String tableName)

Creates new instance of simple result.

Parameters:

schemaName - the name of the schema

tableName - the name of the table

Method Details

addColumn

public void addColumn(String alias,
 String columnName,
 int columnType,
 long columnPrecision,
 int columnScale)

Add column to the result.

Parameters:

alias - Column's alias.

columnName - Column's name.

columnType - Column's value type.

columnPrecision - Column's precision.

columnScale - Column's scale.

addColumn

public void addColumn(String columnName,
 TypeInfo columnType)

Add column to the result.

Parameters:

columnName - Column's name.

columnType - Column's type.

addColumn

public void addColumn(String alias,
 String columnName,
 TypeInfo columnType)

Add column to the result.

Parameters:

alias - Column's alias.

columnName - Column's name.

columnType - Column's type.

addRow

public void addRow(Value... values)

Description copied from interface: ResultTarget

Add the row to the result set.

Specified by:

addRow in interface ResultTarget

Parameters:

values - the values

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

currentRow

public Value[] currentRow()

Description copied from interface: ResultInterface

Get the current row.

Specified by:

currentRow in interface ResultInterface

Returns:

the row

next

public boolean next()

Description copied from interface: ResultInterface

Go to the next row.

Specified by:

next in interface ResultInterface

Returns:

true if a row exists

getRowId

public long getRowId()

Description copied from interface: ResultInterface

Get the current row id, starting with 0. -1 is returned when next() was not called yet.

Specified by:

getRowId in interface ResultInterface

Returns:

the row id

isAfterLast

public boolean isAfterLast()

Description copied from interface: ResultInterface

Check if the current position is after last row.

Specified by:

isAfterLast in interface ResultInterface

Returns:

true if after last

getVisibleColumnCount

public int getVisibleColumnCount()

Description copied from interface: ResultInterface

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

Specified by:

getVisibleColumnCount in interface ResultInterface

Returns:

the number of columns

getRowCount

public long getRowCount()

Description copied from interface: ResultInterface

Get the number of rows in this object.

Specified by:

getRowCount in interface ResultInterface

Specified by:

getRowCount in interface ResultTarget

Returns:

the number of rows

hasNext

public boolean hasNext()

Description copied from interface: ResultInterface

Check if this result has more rows to fetch.

Specified by:

hasNext in interface ResultInterface

Returns:

true if it has

needToClose

public boolean needToClose()

Description copied from interface: ResultInterface

Check if this result set should be closed, for example because it is buffered using a temporary file.

Specified by:

needToClose in interface ResultInterface

Returns:

true if close should be called.

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

getAlias

public String getAlias(int i)

Description copied from interface: ResultInterface

Get the column alias name for the column.

Specified by:

getAlias in interface ResultInterface

Parameters:

i - the column number (starting with 0)

Returns:

the alias name

getSchemaName

public String getSchemaName(int i)

Description copied from interface: ResultInterface

Get the schema name for the column, if one exists.

Specified by:

getSchemaName in interface ResultInterface

Parameters:

i - the column number (starting with 0)

Returns:

the schema name or null

getTableName

public String getTableName(int i)

Description copied from interface: ResultInterface

Get the table name for the column, if one exists.

Specified by:

getTableName in interface ResultInterface

Parameters:

i - the column number (starting with 0)

Returns:

the table name or null

getColumnName

public String getColumnName(int i)

Description copied from interface: ResultInterface

Get the column name.

Specified by:

getColumnName in interface ResultInterface

Parameters:

i - the column number (starting with 0)

Returns:

the column name

getColumnType

public TypeInfo getColumnType(int i)

Description copied from interface: ResultInterface

Get the column data type.

Specified by:

getColumnType in interface ResultInterface

Parameters:

i - the column number (starting with 0)

Returns:

the column data type

isIdentity

public boolean isIdentity(int i)

Description copied from interface: ResultInterface

Check if this is an identity column.

Specified by:

isIdentity in interface ResultInterface

Parameters:

i - the column number (starting with 0)

Returns:

true for identity columns

getNullable

public int getNullable(int i)

Description copied from interface: ResultInterface

Check if this column is nullable.

Specified by:

getNullable in interface ResultInterface

Parameters:

i - the column number (starting with 0)

Returns:

Column.NULLABLE_*

setFetchSize

public void setFetchSize(int fetchSize)

Description copied from interface: ResultInterface

Set the fetch size for this result set.

Specified by:

setFetchSize in interface ResultInterface

Parameters:

fetchSize - the new fetch size

getFetchSize

public int getFetchSize()

Description copied from interface: ResultInterface

Get the current fetch size for this result set.

Specified by:

getFetchSize in interface ResultInterface

Returns:

the fetch size

isLazy

public boolean isLazy()

Description copied from interface: ResultInterface

Check if this a lazy execution result.

Specified by:

isLazy in interface ResultInterface

Returns:

true if it is a lazy result

isClosed

public boolean isClosed()

Description copied from interface: ResultInterface

Check if this result set is closed.

Specified by:

isClosed in interface ResultInterface

Returns:

true if it is

createShallowCopy

public SimpleResult createShallowCopy(Session targetSession)

Description copied from interface: ResultInterface

Create a shallow copy of the result set. The data and a temporary table (if there is any) is not copied.

Specified by:

createShallowCopy in interface ResultInterface

Parameters:

targetSession - the session of the copy

Returns:

the copy if possible, or null if copying is not possible

limitsWereApplied

public void limitsWereApplied()

Description copied from interface: ResultTarget

A hint that sorting, offset and limit may be ignored by this result because they were applied during the query. This is useful for WITH TIES clause because result may contain tied rows above limit.

Specified by:

limitsWereApplied in interface ResultTarget

sortRows

public void sortRows(Comparator<? super Value[]> comparator)

Sort rows in the list.

Parameters:

comparator - the comparator