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

Class SqlAbstractSystemView

java.lang.Object

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

All Implemented Interfaces:

SqlSystemView

Direct Known Subclasses:

SqlAbstractLocalSystemView

public abstract class SqlAbstractSystemView
extends Object
implements SqlSystemView

Meta view base class.

Field Summary

Fields

Modifier and Type	Field	Description
protected org.h2.table.Column[]	cols	Columns.
protected GridKernalContext	ctx	Grid context.
protected static long	DEFAULT_ROW_COUNT_APPROXIMATION	Default row count approximation.
protected String	desc	Description.
protected String[]	indexes	Indexed column names.
protected IgniteLogger	log	Logger.
protected String	tblName	Table name.

Constructor Summary

Constructors

Constructor	Description
SqlAbstractSystemView(String tblName, String desc, GridKernalContext ctx, org.h2.table.Column[] cols, String[] indexes)

Method Summary

Modifier and Type	Method	Description
boolean	canGetRowCount()	Check if the row count can be retrieved quickly.
org.h2.table.Column[]	getColumns()	Gets columns.
String	getCreateSQL()	Gets SQL script for creating table.
String	getDescription()	Gets description.
String[]	getIndexes()	Gets indexed column names.
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).
String	getTableName()	Gets table name.
protected static org.h2.table.Column	newColumn(String name)
protected static org.h2.table.Column	newColumn(String name, int type)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.ignite.internal.processors.query.h2.sys.view.SqlSystemView

getRows, isDistributed

Field Detail

DEFAULT_ROW_COUNT_APPROXIMATION

protected static final long DEFAULT_ROW_COUNT_APPROXIMATION

Default row count approximation.

See Also:

Constant Field Values

tblName

protected final String tblName

Table name.

desc

protected final String desc

Description.

ctx

protected final GridKernalContext ctx

Grid context.

log

protected final IgniteLogger log

Logger.

cols

protected final org.h2.table.Column[] cols

Columns.

indexes

protected final String[] indexes

Indexed column names.

Constructor Detail

SqlAbstractSystemView

public SqlAbstractSystemView(String tblName,
                             String desc,
                             GridKernalContext ctx,
                             org.h2.table.Column[] cols,
                             String[] indexes)

Parameters:

tblName - Table name.

desc - Descriptor.

ctx - Context.

cols - Columns.

indexes - Indexes.

Method Detail

newColumn

protected static org.h2.table.Column newColumn(String name)

Parameters:

name - Name.

newColumn

protected static org.h2.table.Column newColumn(String name,
                                               int type)

Parameters:

name - Name.

type - Type.

getTableName

public String getTableName()

Gets table name.

Specified by:

getTableName in interface SqlSystemView

getDescription

public String getDescription()

Gets description.

Specified by:

getDescription in interface SqlSystemView

getColumns

public org.h2.table.Column[] getColumns()

Gets columns.

Specified by:

getColumns in interface SqlSystemView

getIndexes

public String[] getIndexes()

Gets indexed column names.

Specified by:

getIndexes in interface SqlSystemView

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

getRowCountApproximation

public long getRowCountApproximation()

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

Specified by:

getRowCountApproximation in interface SqlSystemView

canGetRowCount

public boolean canGetRowCount()

Check if the row count can be retrieved quickly.

Specified by:

canGetRowCount in interface SqlSystemView

Returns:

true if it can

getCreateSQL

public String getCreateSQL()

Gets SQL script for creating table.

Specified by:

getCreateSQL in interface SqlSystemView