Package org.apache.ignite.internal.processors.query.h2.sys.view

Class SystemViewLocal<R>

java.lang.Object

org.apache.ignite.internal.processors.query.h2.sys.view.SqlAbstractSystemView

org.apache.ignite.internal.processors.query.h2.sys.view.SqlAbstractLocalSystemView

org.apache.ignite.internal.processors.query.h2.sys.view.SystemViewLocal<R>

All Implemented Interfaces:

SqlSystemView

Direct Known Subclasses:

FiltrableSystemViewLocal

public class SystemViewLocal<R>
extends SqlAbstractLocalSystemView

SQL system view to export SystemView data.

Field Summary

Fields

Modifier and Type	Field	Description
protected SystemView<R>	sysView	System view for export.

Fields inherited from class org.apache.ignite.internal.processors.query.h2.sys.view.SqlAbstractSystemView

cols, ctx, DEFAULT_ROW_COUNT_APPROXIMATION, desc, indexes, log, tblName

Constructor Summary

Constructors

Modifier	Constructor	Description
	SystemViewLocal(GridKernalContext ctx, SystemView<R> sysView)
protected	SystemViewLocal(GridKernalContext ctx, SystemView<R> sysView, String[] indexes)

Method Summary

Modifier and Type	Method	Description
boolean	canGetRowCount()	Check if the row count can be retrieved quickly.
long	getRowCount()	Gets row count for this view (or approximated row count, if real value can't be calculated quickly).
long	getRowCountApproximation()	Gets approximated row count (required to build execution plan).
Iterator<org.h2.result.Row>	getRows(org.h2.engine.Session ses, org.h2.result.SearchRow first, org.h2.result.SearchRow last)	Gets view content.
protected Iterator<R>	viewIterator(org.h2.result.SearchRow first, org.h2.result.SearchRow last)	System view iterator.

Methods inherited from class org.apache.ignite.internal.processors.query.h2.sys.view.SqlAbstractLocalSystemView

conditionForColumn, createRow, getColumnIndex, isDistributed, nodeFilter, toStringSafe, uuidFromValue, valueTimestampFromMillis

Methods inherited from class org.apache.ignite.internal.processors.query.h2.sys.view.SqlAbstractSystemView

getColumns, getCreateSQL, getDescription, getIndexes, getTableName, newColumn, newColumn

Methods inherited from class java.lang.Object

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

Field Detail

sysView

protected final SystemView<R> sysView

System view for export.

Constructor Detail

SystemViewLocal

protected SystemViewLocal(GridKernalContext ctx,
                          SystemView<R> sysView,
                          String[] indexes)

Parameters:

ctx - Kernal context.

sysView - View to export.

indexes - Indexed fields.

SystemViewLocal

public SystemViewLocal(GridKernalContext ctx,
                       SystemView<R> sysView)

Parameters:

ctx - Kernal context.

sysView - View to export.

Method Detail

viewIterator

protected Iterator<R> viewIterator(org.h2.result.SearchRow first,
                                   org.h2.result.SearchRow last)

System view iterator.

getRows

public Iterator<org.h2.result.Row> getRows(org.h2.engine.Session ses,
                                           org.h2.result.SearchRow first,
                                           org.h2.result.SearchRow last)

Gets view content.

Parameters:

ses - Session.

first - First.

last - Last.

getRowCount

public long getRowCount()

Gets row count for this view (or approximated row count, if real value can't be calculated quickly).

Specified by:

getRowCount in interface SqlSystemView

Overrides:

getRowCount in class SqlAbstractSystemView

getRowCountApproximation

public long getRowCountApproximation()

Gets approximated row count (required to build execution plan).

Specified by:

getRowCountApproximation in interface SqlSystemView

Overrides:

getRowCountApproximation in class SqlAbstractSystemView

canGetRowCount

public boolean canGetRowCount()

Check if the row count can be retrieved quickly.

Specified by:

canGetRowCount in interface SqlSystemView

Overrides:

canGetRowCount in class SqlAbstractSystemView

Returns:

true if it can