org.h2.table

Class VirtualTable

java.lang.Object

org.h2.engine.DbObjectBase

org.h2.schema.SchemaObjectBase

org.h2.table.Table

org.h2.table.VirtualTable

All Implemented Interfaces:

DbObject, SchemaObject

Direct Known Subclasses:

DualTable, RangeTable, VirtualConstructedTable

public abstract class VirtualTable
extends Table

A base class for virtual tables.

Field Summary

Fields inherited from class org.h2.table.Table

columns, compareMode, isHidden, TYPE_CACHED, TYPE_MEMORY

Fields inherited from class org.h2.engine.DbObjectBase

comment, database, trace

Fields inherited from interface org.h2.engine.DbObject

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

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	VirtualTable(Schema schema, int id, java.lang.String name)

Method Summary

Methods

Modifier and Type	Method and Description
Index	addIndex(Session session, java.lang.String indexName, int indexId, IndexColumn[] cols, IndexType indexType, boolean create, java.lang.String indexComment) Create an index for this table
void	addRow(Session session, Row row) Add a row to the table and all indexes.
boolean	canDrop() Check if this table can be dropped.
boolean	canReference() Check if this table can be referenced.
void	checkRename() Check if this object can be renamed.
void	checkSupportAlter() Check if this table supports ALTER TABLE.
void	close(Session session) Close the table object and flush changes.
java.lang.String	getCreateSQL() Build a SQL statement to re-create this object.
long	getDiskSpaceUsed()
java.lang.String	getDropSQL() Build a SQL statement to drop this object.
java.util.ArrayList<Index>	getIndexes() Get all indexes for this table.
TableType	getTableType() Get the table type name
Index	getUniqueIndex() Get any unique index for this table if one exists.
boolean	isLockedExclusively() Check if this table is locked exclusively.
boolean	lock(Session session, boolean exclusive, boolean forceLockEvenInMvcc) Lock the table for the given session.
void	removeRow(Session session, Row row) Remove a row from the table and all indexes.
void	truncate(Session session) Remove all rows from the table and indexes.
void	unlock(Session s) Release the lock for this session.

Methods inherited from class org.h2.table.Table

addConstraint, addDependencies, addDependentView, addSequence, addSynonym, addTrigger, canGetRowCount, canTruncate, checkDeadlock, checkWritingAllowed, compareValues, createRow, doesColumnExist, dropMultipleColumnsConstraintsAndIndexes, findColumn, findPrimaryKey, fire, fireAfterRow, fireBeforeRow, fireRow, getBestPlanItem, getCheckForeignKeyConstraints, getChildren, getColumn, getColumn, getColumn, getColumns, getCompareMode, getConstraints, getCreateSQLForCopy, getDefaultValue, getDependentViews, getIndex, getIndexForColumn, getMaxDataModificationId, getOnCommitDrop, getOnCommitTruncate, getOnUpdateValue, getPrimaryKey, getRow, getRowCount, getRowCountApproximation, getRowIdColumn, getScanIndex, getScanIndex, getTemplateRow, getTemplateSimpleRow, getType, hasInsteadOfTrigger, hasSelectTrigger, isDeterministic, isGlobalTemporary, isHidden, isLockedExclusivelyBy, isMVStore, isPersistData, isPersistIndexes, isQueryComparable, isTableExpression, isView, lockRow, removeChildrenAndResources, removeColumnExpressionsDependencies, removeConstraint, removeDependentView, removeIndex, removeIndexOrTransferOwnership, removeSequence, removeSynonym, removeTrigger, rename, renameColumn, setCheckForeignKeyConstraints, setColumns, setHidden, setOnCommitDrop, setOnCommitTruncate, setTableExpression, updateRow, updateRows, validateConvertUpdateSequence

Methods inherited from class org.h2.schema.SchemaObjectBase

getSchema, getSQL, getSQL

Methods inherited from class org.h2.engine.DbObjectBase

getComment, getDatabase, getId, getModificationId, getName, invalidate, isTemporary, isValid, setComment, setModified, setObjectName, setTemporary, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.h2.engine.DbObject

getComment, getDatabase, getId, getName, isTemporary, setComment, setTemporary

Constructor Detail

VirtualTable

protected VirtualTable(Schema schema,
            int id,
            java.lang.String name)

Method Detail

lock

public boolean lock(Session session,
           boolean exclusive,
           boolean forceLockEvenInMvcc)

Description copied from class: Table

Lock the table for the given session. This method waits until the lock is granted.

Specified by:

lock in class Table

Parameters:

session - the session

exclusive - true for write locks, false for read locks

forceLockEvenInMvcc - lock even in the MVCC mode

Returns:

true if the table was already exclusively locked by this session.

close

public void close(Session session)

Description copied from class: Table

Close the table object and flush changes.

Specified by:

close in class Table

Parameters:

session - the session

unlock

public void unlock(Session s)

Description copied from class: Table

Release the lock for this session.

Specified by:

unlock in class Table

Parameters:

s - the session

addIndex

public Index addIndex(Session session,
             java.lang.String indexName,
             int indexId,
             IndexColumn[] cols,
             IndexType indexType,
             boolean create,
             java.lang.String indexComment)

Description copied from class: Table

Create an index for this table

Specified by:

addIndex in class Table

Parameters:

session - the session

indexName - the name of the index

indexId - the id

cols - the index columns

indexType - the index type

create - whether this is a new index

indexComment - the comment

Returns:

the index

removeRow

public void removeRow(Session session,
             Row row)

Description copied from class: Table

Remove a row from the table and all indexes.

Specified by:

removeRow in class Table

Parameters:

session - the session

row - the row

truncate

public void truncate(Session session)

Description copied from class: Table

Remove all rows from the table and indexes.

Specified by:

truncate in class Table

Parameters:

session - the session

addRow

public void addRow(Session session,
          Row row)

Description copied from class: Table

Add a row to the table and all indexes.

Specified by:

addRow in class Table

Parameters:

session - the session

row - the row

checkSupportAlter

public void checkSupportAlter()

Description copied from class: Table

Check if this table supports ALTER TABLE.

Specified by:

checkSupportAlter in class Table

getTableType

public TableType getTableType()

Description copied from class: Table

Get the table type name

Specified by:

getTableType in class Table

Returns:

the table type name

getUniqueIndex

public Index getUniqueIndex()

Description copied from class: Table

Get any unique index for this table if one exists.

Specified by:

getUniqueIndex in class Table

Returns:

a unique index

getIndexes

public java.util.ArrayList<Index> getIndexes()

Description copied from class: Table

Get all indexes for this table.

Specified by:

getIndexes in class Table

Returns:

the list of indexes

isLockedExclusively

public boolean isLockedExclusively()

Description copied from class: Table

Check if this table is locked exclusively.

Specified by:

isLockedExclusively in class Table

Returns:

true if it is.

canReference

public boolean canReference()

Description copied from class: Table

Check if this table can be referenced.

Overrides:

canReference in class Table

Returns:

true if it can

canDrop

public boolean canDrop()

Description copied from class: Table

Check if this table can be dropped.

Specified by:

canDrop in class Table

Returns:

true if it can

getDiskSpaceUsed

public long getDiskSpaceUsed()

Specified by:

getDiskSpaceUsed in class Table

getCreateSQL

public java.lang.String getCreateSQL()

Description copied from class: DbObjectBase

Build a SQL statement to re-create this object.

Specified by:

getCreateSQL in interface DbObject

Specified by:

getCreateSQL in class DbObjectBase

Returns:

the SQL statement

getDropSQL

public java.lang.String getDropSQL()

Description copied from class: DbObjectBase

Build a SQL statement to drop this object.

Specified by:

getDropSQL in interface DbObject

Specified by:

getDropSQL in class DbObjectBase

Returns:

the SQL statement

checkRename

public void checkRename()

Description copied from class: DbObjectBase

Check if this object can be renamed. System objects may not be renamed.

Specified by:

checkRename in interface DbObject

Specified by:

checkRename in class DbObjectBase