org.h2.table

Class RegularTable

java.lang.Object

org.h2.engine.DbObjectBase

org.h2.schema.SchemaObjectBase

org.h2.table.Table

org.h2.table.TableBase

org.h2.table.RegularTable

All Implemented Interfaces:

DbObject, SchemaObject

Direct Known Subclasses:

MVTable, PageStoreTable

public abstract class RegularTable
extends TableBase

Most tables are an instance of this class. For this table, the data is stored in the database. The actual data is not kept here, instead it is kept in the indexes. There is at least one index, the scan index.

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	containsLargeObject Whether the table contains a CLOB or BLOB.
protected Session	lockExclusiveSession The session (if any) that has exclusively locked this table.
protected java.util.concurrent.ConcurrentHashMap<Session,Session>	lockSharedSessions The set of sessions (if any) that have a shared lock on the table.

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	RegularTable(CreateTableData data)

Method Summary

Methods

Modifier and Type	Method and Description
protected static void	addRowsToIndex(Session session, java.util.ArrayList<Row> list, Index index) Appends the specified rows to the specified index.
boolean	canDrop() Check if this table can be dropped.
boolean	canGetRowCount() Check if the row count can be retrieved quickly.
boolean	canTruncate() Check if this table can be truncated.
java.util.ArrayList<Session>	checkDeadlock(Session session, Session clash, java.util.Set<Session> visited) Check if a deadlock occurred.
void	checkRename() Check if this object can be renamed.
void	checkSupportAlter() Check if this table supports ALTER TABLE.
boolean	getContainsLargeObject()
protected static java.lang.String	getDeadlockDetails(java.util.ArrayList<Session> sessions, boolean exclusive) Formats details of a deadlock.
Column	getRowIdColumn() Get the row id column if this table has one.
TableType	getTableType() Get the table type name
boolean	isDeterministic() Check if the table is deterministic.
boolean	isLockedExclusively() Check if this table is locked exclusively.
boolean	isLockedExclusivelyBy(Session session) Check if the table is exclusively locked by this session.
protected static void	sortRows(java.util.ArrayList<? extends SearchRow> list, Index index) Sorts the specified list of rows for a specified index.
java.lang.String	toString()

Methods inherited from class org.h2.table.TableBase

getCreateSQL, getDropSQL, getMainIndexColumn, isGlobalTemporary

Methods inherited from class org.h2.table.Table

addConstraint, addDependencies, addDependentView, addIndex, addRow, addSequence, addSynonym, addTrigger, canReference, checkWritingAllowed, close, compareValues, createRow, doesColumnExist, dropMultipleColumnsConstraintsAndIndexes, findColumn, findPrimaryKey, fire, fireAfterRow, fireBeforeRow, fireRow, getBestPlanItem, getCheckForeignKeyConstraints, getChildren, getColumn, getColumn, getColumn, getColumns, getCompareMode, getConstraints, getCreateSQLForCopy, getDefaultValue, getDependentViews, getDiskSpaceUsed, getIndex, getIndexes, getIndexForColumn, getMaxDataModificationId, getOnCommitDrop, getOnCommitTruncate, getOnUpdateValue, getPrimaryKey, getRow, getRowCount, getRowCountApproximation, getScanIndex, getScanIndex, getTemplateRow, getTemplateSimpleRow, getType, getUniqueIndex, hasInsteadOfTrigger, hasSelectTrigger, isHidden, isMVStore, isPersistData, isPersistIndexes, isQueryComparable, isTableExpression, isView, lock, lockRow, removeChildrenAndResources, removeColumnExpressionsDependencies, removeConstraint, removeDependentView, removeIndex, removeIndexOrTransferOwnership, removeRow, removeSequence, removeSynonym, removeTrigger, rename, renameColumn, setCheckForeignKeyConstraints, setColumns, setHidden, setOnCommitDrop, setOnCommitTruncate, setTableExpression, truncate, unlock, 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

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

Field Detail

containsLargeObject

protected final boolean containsLargeObject

Whether the table contains a CLOB or BLOB.

lockExclusiveSession

protected volatile Session lockExclusiveSession

The session (if any) that has exclusively locked this table.

lockSharedSessions

protected final java.util.concurrent.ConcurrentHashMap<Session,Session> lockSharedSessions

The set of sessions (if any) that have a shared lock on the table. Here we are using using a ConcurrentHashMap as a set, as there is no ConcurrentHashSet.

Constructor Detail

RegularTable

protected RegularTable(CreateTableData data)

Method Detail

addRowsToIndex

protected static void addRowsToIndex(Session session,
                  java.util.ArrayList<Row> list,
                  Index index)

Appends the specified rows to the specified index.

Parameters:

session - the session

list - the rows, list is cleared on completion

index - the index to append to

getDeadlockDetails

protected static java.lang.String getDeadlockDetails(java.util.ArrayList<Session> sessions,
                                  boolean exclusive)

Formats details of a deadlock.

Parameters:

sessions - the list of sessions

exclusive - true if waiting for exclusive lock, false otherwise

Returns:

formatted details of a deadlock

sortRows

protected static void sortRows(java.util.ArrayList<? extends SearchRow> list,
            Index index)

Sorts the specified list of rows for a specified index.

Parameters:

list - the list of rows

index - the index to sort for

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

canGetRowCount

public boolean canGetRowCount()

Description copied from class: Table

Check if the row count can be retrieved quickly.

Specified by:

canGetRowCount in class Table

Returns:

true if it can

canTruncate

public boolean canTruncate()

Description copied from class: Table

Check if this table can be truncated.

Overrides:

canTruncate in class Table

Returns:

true if it can

checkDeadlock

public java.util.ArrayList<Session> checkDeadlock(Session session,
                                         Session clash,
                                         java.util.Set<Session> visited)

Description copied from class: Table

Check if a deadlock occurred. This method is called recursively. There is a circle if the session to be tested has already being visited. If this session is part of the circle (if it is the clash session), the method must return an empty object array. Once a deadlock has been detected, the methods must add the session to the list. If this session is not part of the circle, or if no deadlock is detected, this method returns null.

Overrides:

checkDeadlock in class Table

Parameters:

session - the session to be tested for

clash - set with sessions already visited, and null when starting verification

visited - set with sessions already visited, and null when starting verification

Returns:

an object array with the sessions involved in the deadlock, or null

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

checkSupportAlter

public void checkSupportAlter()

Description copied from class: Table

Check if this table supports ALTER TABLE.

Specified by:

checkSupportAlter in class Table

getContainsLargeObject

public boolean getContainsLargeObject()

getRowIdColumn

public Column getRowIdColumn()

Description copied from class: Table

Get the row id column if this table has one.

Overrides:

getRowIdColumn in class Table

Returns:

the row id column, or null

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

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

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.

isLockedExclusivelyBy

public boolean isLockedExclusivelyBy(Session session)

Description copied from class: Table

Check if the table is exclusively locked by this session.

Overrides:

isLockedExclusivelyBy in class Table

Parameters:

session - the session

Returns:

true if it is

toString

public java.lang.String toString()

Overrides:

toString in class DbObjectBase