Package org.h2.table

Class ShadowTable

java.lang.Object

org.h2.engine.DbObject

org.h2.schema.SchemaObject

org.h2.table.Table

org.h2.table.VirtualTable

org.h2.table.VirtualConstructedTable

org.h2.table.ShadowTable

All Implemented Interfaces:

HasSQL

public class ShadowTable
extends VirtualConstructedTable

A temporary shadow table for recursive queries.

Field Summary

Fields inherited from class org.h2.table.Table

columns, compareMode, EXCLUSIVE_LOCK, READ_LOCK, TYPE_CACHED, TYPE_MEMORY, WRITE_LOCK

Fields inherited from class org.h2.engine.DbObject

AGGREGATE, comment, COMMENT, CONSTANT, CONSTRAINT, database, DOMAIN, FUNCTION_ALIAS, INDEX, RIGHT, ROLE, SCHEMA, SEQUENCE, SETTING, SYNONYM, TABLE_OR_VIEW, trace, TRIGGER, USER

Fields inherited from interface org.h2.util.HasSQL

ADD_PLAN_INFORMATION, DEFAULT_SQL_FLAGS, NO_CASTS, QUOTE_ONLY_WHEN_REQUIRED, REPLACE_LOBS_FOR_TRACE, TRACE_SQL_FLAGS

Constructor Summary

Constructors

Constructor	Description
ShadowTable(Schema schema, String name, Column[] columns)

Method Summary

Modifier and Type	Method	Description
boolean	canGetRowCount(SessionLocal session)	Check if the row count can be retrieved quickly.
ResultInterface	getResult(SessionLocal session)	Read the rows from the table.
long	getRowCount(SessionLocal session)	Get the row count for this table.
long	getRowCountApproximation(SessionLocal session)	Get the approximated row count for this table.
boolean	isDeterministic()	Check if the table is deterministic.

Methods inherited from class org.h2.table.VirtualConstructedTable

getMaxDataModificationId, getScanIndex

Methods inherited from class org.h2.table.VirtualTable

addIndex, addRow, canDrop, canReference, checkRename, checkSupportAlter, close, getCreateSQL, getIndexes, getSQL, getTableType, isInsertable, removeRow, truncate

Methods inherited from class org.h2.table.Table

addConstraint, addDependencies, addDependentMaterializedView, addDependentView, addSequence, addSynonym, addTrigger, canTruncate, checkDeadlock, checkWritingAllowed, compareValues, convertInsertRow, convertUpdateRow, createRow, doesColumnExist, dropMultipleColumnsConstraintsAndIndexes, findColumn, findPrimaryKey, fire, fireAfterRow, fireBeforeRow, fireRow, getBestPlanItem, getCheckForeignKeyConstraints, getChildren, getColumn, getColumn, getColumn, getColumns, getCompareMode, getConstraints, getDependentMaterializedViews, getDependentViews, getDiskSpaceUsed, getIdentityColumn, getIndex, getIndexForColumn, getMainIndexColumn, getNullRow, getOnCommitDrop, getOnCommitTruncate, getPrimaryKey, getRow, getRowFactory, getRowIdColumn, getScanIndex, getSQLTableType, getTemplateRow, getTemplateSimpleRow, getTriggers, getType, getVisibleColumns, hasSelectTrigger, isGlobalTemporary, isLockedExclusively, isLockedExclusivelyBy, isPersistData, isPersistIndexes, isQueryComparable, isRowLockable, isView, lock, lockRow, removeChildrenAndResources, removeColumnExpressionsDependencies, removeConstraint, removeDependentMaterializedView, removeDependentView, removeIndex, removeIndexOrTransferOwnership, removeSequence, removeSynonym, removeTrigger, rename, renameColumn, setCheckForeignKeyConstraints, setColumns, setOnCommitDrop, setOnCommitTruncate, unlock, updateRow, updateRows

Methods inherited from class org.h2.schema.SchemaObject

getSchema, getSQL

Methods inherited from class org.h2.engine.DbObject

equals, getComment, getCreateSQLForCopy, getCreateSQLForMeta, getDatabase, getDropSQL, getId, getModificationId, getName, hashCode, invalidate, isTemporary, isValid, setComment, setModified, setObjectName, setTemporary, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.h2.util.HasSQL

getTraceSQL

Constructor Details

ShadowTable

public ShadowTable(Schema schema,
 String name,
 Column[] columns)

Method Details

getResult

public ResultInterface getResult(SessionLocal session)

Description copied from class: VirtualConstructedTable

Read the rows from the table.

Specified by:

getResult in class VirtualConstructedTable

Parameters:

session - the session

Returns:

the result

isDeterministic

public boolean isDeterministic()

Description copied from class: Table

Check if the table is deterministic.

Specified by:

isDeterministic in class Table

Returns:

true if it is

canGetRowCount

public boolean canGetRowCount(SessionLocal session)

Description copied from class: Table

Check if the row count can be retrieved quickly.

Specified by:

canGetRowCount in class Table

Parameters:

session - the session

Returns:

true if it can

getRowCount

public long getRowCount(SessionLocal session)

Description copied from class: Table

Get the row count for this table.

Specified by:

getRowCount in class Table

Parameters:

session - the session

Returns:

the row count

getRowCountApproximation

public long getRowCountApproximation(SessionLocal session)

Description copied from class: Table

Get the approximated row count for this table.

Specified by:

getRowCountApproximation in class Table

Parameters:

session - the session

Returns:

the approximated row count