Table

java.lang.Object
- org.h2.engine.DbObjectBase
- - org.h2.schema.SchemaObjectBase
  - - org.h2.table.Table

All Implemented Interfaces:

DbObject, SchemaObject

Direct Known Subclasses:

FunctionTable, MetaTable, RangeTable, TableBase, TableLink, TableView
```
public abstract class Table
extends SchemaObjectBase
```
This is the base class for most tables. A table contains a list of columns and a list of rows.

Field Summary

Fields
Modifier and Type	Field and Description
`protected Column[]`	`columns` The columns of this table.
`protected CompareMode`	`compareMode` The compare mode used for this table.
`protected boolean`	`isHidden` Protected tables are not listed in the meta data and are excluded when using the SCRIPT command.
`static int`	`TYPE_CACHED` The table type that means this table is a regular persistent table.
`static int`	`TYPE_MEMORY` The table type that means this table is a regular persistent table.

Fields inherited from class org.h2.engine.DbObjectBase
comment, database, trace

Fields inherited from interface org.h2.engine.DbObject
AGGREGATE, COMMENT, CONSTANT, CONSTRAINT, FUNCTION_ALIAS, INDEX, RIGHT, ROLE, SCHEMA, SEQUENCE, SETTING, SYNONYM, TABLE_OR_VIEW, TRIGGER, USER, USER_DATATYPE

Constructor Summary

Constructors
Constructor and Description

Table(Schema schema, int id, java.lang.String name, boolean persistIndexes, boolean persistData)

Constructors
Constructor and Description
`Table(Schema schema, int id, java.lang.String name, boolean persistIndexes, boolean persistData)`

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`addConstraint(Constraint constraint)` Add a constraint to the table.
`void`	`addDependencies(java.util.HashSet<DbObject> dependencies)` Add all objects that this table depends on to the hash set.
`void`	`addDependentView(TableView view)` Add a view to this table.
`abstract 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
`abstract void`	`addRow(Session session, Row row)` Add a row to the table and all indexes.
`void`	`addSequence(Sequence sequence)` Add a sequence to this table.
`void`	`addSynonym(TableSynonym synonym)` Add a synonym to this table.
`void`	`addTrigger(TriggerObject trigger)` Add a trigger to this table.
`abstract boolean`	`canDrop()` Check if this table can be dropped.
`abstract boolean`	`canGetRowCount()` Check if the row count can be retrieved quickly.
`boolean`	`canReference()` Check if this table can be referenced.
`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.
`abstract void`	`checkSupportAlter()` Check if this table supports ALTER TABLE.
`void`	`checkWritingAllowed()` Tests if the table can be written.
`abstract void`	`close(Session session)` Close the table object and flush changes.
`void`	`commit(short operation, Row row)` Commit an operation (when using multi-version concurrency).
`int`	`compareTypeSafe(Value a, Value b)` Compare two values with the current comparison mode.
`boolean`	`doesColumnExist(java.lang.String columnName)` Does the column with the given name exist?
`void`	`dropMultipleColumnsConstraintsAndIndexes(Session session, java.util.ArrayList<Column> columnsToDrop)` Check that these columns are not referenced by a multi-column constraint or multi-column index.
`Index`	`findPrimaryKey()` Get the primary key index if there is one, or null if there is none.
`void`	`fire(Session session, int type, boolean beforeAction)` Fire the triggers for this table.
`void`	`fireAfterRow(Session session, Row oldRow, Row newRow, boolean rollback)` Fire all triggers that need to be called after a row is updated.
`boolean`	`fireBeforeRow(Session session, Row oldRow, Row newRow)` Fire all triggers that need to be called before a row is updated.
`boolean`	`fireRow()` Check if row based triggers or constraints are defined.
`PlanItem`	`getBestPlanItem(Session session, int[] masks, TableFilter[] filters, int filter, SortOrder sortOrder, java.util.HashSet<Column> allColumnsSet)` Get the best plan for the given search mask.
`boolean`	`getCheckForeignKeyConstraints()`
`java.util.ArrayList<DbObject>`	`getChildren()` Get the list of dependent children (for tables, this includes indexes and so on).
`Column`	`getColumn(int index)` Get the column at the given index.
`Column`	`getColumn(java.lang.String columnName)` Get the column with the given name.
`Column[]`	`getColumns()`
`CompareMode`	`getCompareMode()`
`java.util.ArrayList<Constraint>`	`getConstraints()`
`java.lang.String`	`getCreateSQLForCopy(Table table, java.lang.String quotedName)` Build a SQL statement to re-create the object, or to create a copy of the object with a different name or referencing a different table
`Value`	`getDefaultValue(Session session, Column column)` Get or generate a default value for the given column.
`java.util.concurrent.CopyOnWriteArrayList<TableView>`	`getDependentViews()`
`abstract long`	`getDiskSpaceUsed()`
`Index`	`getIndex(java.lang.String indexName)` Get an index by name.
`abstract java.util.ArrayList<Index>`	`getIndexes()` Get all indexes for this table.
`Index`	`getIndexForColumn(Column column, boolean needGetFirstOrLast, boolean needFindNext)` Get the index that has the given column as the first element.
`abstract long`	`getMaxDataModificationId()` Get the last data modification id.
`boolean`	`getOnCommitDrop()`
`boolean`	`getOnCommitTruncate()`
`Value`	`getOnUpdateValue(Session session, Column column)` Generates on update value for the given column.
`Index`	`getPrimaryKey()`
`Row`	`getRow(Session session, long key)` Get the given row.
`abstract long`	`getRowCount(Session session)` Get the row count for this table.
`abstract long`	`getRowCountApproximation()` Get the approximated row count for this table.
`Column`	`getRowIdColumn()` Get the row id column if this table has one.
`abstract Index`	`getScanIndex(Session session)` Get the scan index to iterate through all rows.
`Index`	`getScanIndex(Session session, int[] masks, TableFilter[] filters, int filter, SortOrder sortOrder, java.util.HashSet<Column> allColumnsSet)` Get the scan index for this table.
`abstract TableType`	`getTableType()` Get the table type name
`Row`	`getTemplateRow()`
`SearchRow`	`getTemplateSimpleRow(boolean singleColumn)` Get a new simple row object.
`int`	`getType()` Get the object type.
`abstract Index`	`getUniqueIndex()` Get any unique index for this table if one exists.
`boolean`	`hasSelectTrigger()` Check whether this table has a select trigger.
`abstract boolean`	`isDeterministic()` Check if the table is deterministic.
`boolean`	`isGlobalTemporary()`
`boolean`	`isHidden()` Check whether this is a hidden object that doesn't appear in the meta data and in the script, and is not dropped on DROP ALL OBJECTS.
`abstract boolean`	`isLockedExclusively()` Check if this table is locked exclusively.
`boolean`	`isLockedExclusivelyBy(Session session)` Check if the table is exclusively locked by this session.
`boolean`	`isMVStore()`
`boolean`	`isPersistData()`
`boolean`	`isPersistIndexes()`
`boolean`	`isQueryComparable()` Check whether the table (or view) contains no columns that prevent index conditions to be used.
`boolean`	`isTableExpression()`
`boolean`	`isView()`
`abstract boolean`	`lock(Session session, boolean exclusive, boolean forceLockEvenInMvcc)` Lock the table for the given session.
`void`	`removeChildrenAndResources(Session session)` Remove all dependent objects and free all resources (files, blocks in files) of this object.
`void`	`removeConstraint(Constraint constraint)` Remove the given constraint from the list.
`void`	`removeDependentView(TableView view)` Remove the given view from the dependent views list.
`void`	`removeIndex(Index index)` Remove the given index from the list.
`void`	`removeIndexOrTransferOwnership(Session session, Index index)` If the index is still required by a constraint, transfer the ownership to it.
`abstract void`	`removeRow(Session session, Row row)` Remove a row from the table and all indexes.
`void`	`removeSequence(Sequence sequence)` Remove a sequence from the table.
`void`	`removeSynonym(TableSynonym synonym)` Remove the given view from the list.
`void`	`removeTrigger(TriggerObject trigger)` Remove the given trigger from the list.
`void`	`rename(java.lang.String newName)` Rename the object.
`void`	`renameColumn(Column column, java.lang.String newName)` Rename a column of this table.
`void`	`setCheckForeignKeyConstraints(Session session, boolean enabled, boolean checkExisting)` Enable or disable foreign key constraint checking for this table.
`protected void`	`setColumns(Column[] columns)`
`void`	`setHidden(boolean hidden)`
`void`	`setOnCommitDrop(boolean onCommitDrop)`
`void`	`setOnCommitTruncate(boolean onCommitTruncate)`
`void`	`setTableExpression(boolean tableExpression)`
`abstract void`	`truncate(Session session)` Remove all rows from the table and indexes.
`abstract void`	`unlock(Session s)` Release the lock for this session.
`void`	`updateRows(Prepared prepared, Session session, RowList rows)` Update a list of rows in this table.
`void`	`validateConvertUpdateSequence(Session session, Row row)` Validate all values in this row, convert the values if required, and update the sequence values if required.

Methods inherited from class org.h2.schema.SchemaObjectBase
getSchema, getSQL, initSchemaObjectBase

Methods inherited from class org.h2.engine.DbObjectBase
checkRename, getComment, getCreateSQL, getDatabase, getDropSQL, getId, getModificationId, getName, initDbObjectBase, 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
checkRename, getComment, getCreateSQL, getDatabase, getDropSQL, getId, getName, isTemporary, setComment, setTemporary

- Field Detail
  - TYPE_CACHED
```
public static final int TYPE_CACHED
```
    The table type that means this table is a regular persistent table.
    
    See Also:
    
    Constant Field Values
  - TYPE_MEMORY
```
public static final int TYPE_MEMORY
```
    The table type that means this table is a regular persistent table.
    
    See Also:
    
    Constant Field Values
  - columns
```
protected Column[] columns
```
    The columns of this table.
  - compareMode
```
protected CompareMode compareMode
```
    The compare mode used for this table.
  - isHidden
```
protected boolean isHidden
```
    Protected tables are not listed in the meta data and are excluded when using the SCRIPT command.
- Constructor Detail
  - Table
```
public Table(Schema schema,
             int id,
             java.lang.String name,
             boolean persistIndexes,
             boolean persistData)
```
- Method Detail
  - rename
```
public void rename(java.lang.String newName)
```
    Description copied from interface: DbObject
    
    Rename the object.
    
    Specified by:
    
    rename in interface DbObject
    
    Overrides:
    
    rename in class DbObjectBase
    
    Parameters:
    
    newName - the new name
  - isView
```
public boolean isView()
```
  - lock
```
public abstract boolean lock(Session session,
                             boolean exclusive,
                             boolean forceLockEvenInMvcc)
```
    Lock the table for the given session. This method waits until the lock is granted.
    
    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.
    
    Throws:
    
    DbException - if a lock timeout occurred
  - close
```
public abstract void close(Session session)
```
    Close the table object and flush changes.
    
    Parameters:
    
    session - the session
  - unlock
```
public abstract void unlock(Session s)
```
    Release the lock for this session.
    
    Parameters:
    
    s - the session
  - addIndex
```
public abstract 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
    
    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
  - getRow
```
public Row getRow(Session session,
                  long key)
```
    Get the given row.
    
    Parameters:
    
    session - the session
    
    key - the primary key
    
    Returns:
    
    the row
  - removeRow
```
public abstract void removeRow(Session session,
                               Row row)
```
    Remove a row from the table and all indexes.
    
    Parameters:
    
    session - the session
    
    row - the row
  - truncate
```
public abstract void truncate(Session session)
```
    Remove all rows from the table and indexes.
    
    Parameters:
    
    session - the session
  - addRow
```
public abstract void addRow(Session session,
                            Row row)
```
    Add a row to the table and all indexes.
    
    Parameters:
    
    session - the session
    
    row - the row
    
    Throws:
    
    DbException - if a constraint was violated
  - commit
```
public void commit(short operation,
                   Row row)
```
    Commit an operation (when using multi-version concurrency).
    
    Parameters:
    
    operation - the operation
    
    row - the row
  - checkSupportAlter
```
public abstract void checkSupportAlter()
```
    Check if this table supports ALTER TABLE.
    
    Throws:
    
    DbException - if it is not supported
  - getTableType
```
public abstract TableType getTableType()
```
    Get the table type name
    
    Returns:
    
    the table type name
  - getScanIndex
```
public abstract Index getScanIndex(Session session)
```
    Get the scan index to iterate through all rows.
    
    Parameters:
    
    session - the session
    
    Returns:
    
    the index
  - getScanIndex
```
public Index getScanIndex(Session session,
                          int[] masks,
                          TableFilter[] filters,
                          int filter,
                          SortOrder sortOrder,
                          java.util.HashSet<Column> allColumnsSet)
```
    Get the scan index for this table.
    
    Parameters:
    
    session - the session
    
    masks - the search mask
    
    filters - the table filters
    
    filter - the filter index
    
    sortOrder - the sort order
    
    allColumnsSet - all columns
    
    Returns:
    
    the scan index
  - getUniqueIndex
```
public abstract Index getUniqueIndex()
```
    Get any unique index for this table if one exists.
    
    Returns:
    
    a unique index
  - getIndexes
```
public abstract java.util.ArrayList<Index> getIndexes()
```
    Get all indexes for this table.
    
    Returns:
    
    the list of indexes
  - getIndex
```
public Index getIndex(java.lang.String indexName)
```
    Get an index by name.
    
    Parameters:
    
    indexName - the index name to search for
    
    Returns:
    
    the found index
  - isLockedExclusively
```
public abstract boolean isLockedExclusively()
```
    Check if this table is locked exclusively.
    
    Returns:
    
    true if it is.
  - getMaxDataModificationId
```
public abstract long getMaxDataModificationId()
```
    Get the last data modification id.
    
    Returns:
    
    the modification id
  - isDeterministic
```
public abstract boolean isDeterministic()
```
    Check if the table is deterministic.
    
    Returns:
    
    true if it is
  - canGetRowCount
```
public abstract boolean canGetRowCount()
```
    Check if the row count can be retrieved quickly.
    
    Returns:
    
    true if it can
  - canReference
```
public boolean canReference()
```
    Check if this table can be referenced.
    
    Returns:
    
    true if it can
  - canDrop
```
public abstract boolean canDrop()
```
    Check if this table can be dropped.
    
    Returns:
    
    true if it can
  - getRowCount
```
public abstract long getRowCount(Session session)
```
    Get the row count for this table.
    
    Parameters:
    
    session - the session
    
    Returns:
    
    the row count
  - getRowCountApproximation
```
public abstract long getRowCountApproximation()
```
    Get the approximated row count for this table.
    
    Returns:
    
    the approximated row count
  - getDiskSpaceUsed
```
public abstract long getDiskSpaceUsed()
```
  - getRowIdColumn
```
public Column getRowIdColumn()
```
    Get the row id column if this table has one.
    
    Returns:
    
    the row id column, or null
  - getCreateSQLForCopy
```
public java.lang.String getCreateSQLForCopy(Table table,
                                            java.lang.String quotedName)
```
    Description copied from interface: DbObject
    
    Build a SQL statement to re-create the object, or to create a copy of the object with a different name or referencing a different table
    
    Parameters:
    
    table - the new table
    
    quotedName - the quoted name
    
    Returns:
    
    the SQL statement
  - isQueryComparable
```
public boolean isQueryComparable()
```
    Check whether the table (or view) contains no columns that prevent index conditions to be used. For example, a view that contains the ROWNUM() pseudo-column prevents this.
    
    Returns:
    
    true if the table contains no query-comparable column
  - addDependencies
```
public void addDependencies(java.util.HashSet<DbObject> dependencies)
```
    Add all objects that this table depends on to the hash set.
    
    Parameters:
    
    dependencies - the current set of dependencies
  - getChildren
```
public java.util.ArrayList<DbObject> getChildren()
```
    Description copied from interface: DbObject
    
    Get the list of dependent children (for tables, this includes indexes and so on).
    
    Specified by:
    
    getChildren in interface DbObject
    
    Overrides:
    
    getChildren in class DbObjectBase
    
    Returns:
    
    the list of children
  - setColumns
```
protected void setColumns(Column[] columns)
```
  - renameColumn
```
public void renameColumn(Column column,
                         java.lang.String newName)
```
    Rename a column of this table.
    
    Parameters:
    
    column - the column to rename
    
    newName - the new column name
  - isLockedExclusivelyBy
```
public boolean isLockedExclusivelyBy(Session session)
```
    Check if the table is exclusively locked by this session.
    
    Parameters:
    
    session - the session
    
    Returns:
    
    true if it is
  - updateRows
```
public void updateRows(Prepared prepared,
                       Session session,
                       RowList rows)
```
    Update a list of rows in this table.
    
    Parameters:
    
    prepared - the prepared statement
    
    session - the session
    
    rows - a list of row pairs of the form old row, new row, old row, new row,...
  - getDependentViews
```
public java.util.concurrent.CopyOnWriteArrayList<TableView> getDependentViews()
```
  - removeChildrenAndResources
```
public void removeChildrenAndResources(Session session)
```
    Description copied from class: DbObjectBase
    
    Remove all dependent objects and free all resources (files, blocks in files) of this object.
    
    Specified by:
    
    removeChildrenAndResources in interface DbObject
    
    Specified by:
    
    removeChildrenAndResources in class DbObjectBase
    
    Parameters:
    
    session - the session
  - dropMultipleColumnsConstraintsAndIndexes
```
public void dropMultipleColumnsConstraintsAndIndexes(Session session,
                                                     java.util.ArrayList<Column> columnsToDrop)
```
    Check that these columns are not referenced by a multi-column constraint or multi-column index. If it is, an exception is thrown. Single-column references and indexes are dropped.
    
    Parameters:
    
    session - the session
    
    columnsToDrop - the columns to drop
    
    Throws:
    
    DbException - if the column is referenced by multi-column constraints or indexes
  - getTemplateRow
```
public Row getTemplateRow()
```
  - getTemplateSimpleRow
```
public SearchRow getTemplateSimpleRow(boolean singleColumn)
```
    Get a new simple row object.
    
    Parameters:
    
    singleColumn - if only one value need to be stored
    
    Returns:
    
    the simple row object
  - getColumns
```
public Column[] getColumns()
```
  - getType
```
public int getType()
```
    Description copied from interface: DbObject
    
    Get the object type.
    
    Returns:
    
    the object type
  - getColumn
```
public Column getColumn(int index)
```
    Get the column at the given index.
    
    Parameters:
    
    index - the column index (0, 1,...)
    
    Returns:
    
    the column
  - getColumn
```
public Column getColumn(java.lang.String columnName)
```
    Get the column with the given name.
    
    Parameters:
    
    columnName - the column name
    
    Returns:
    
    the column
    
    Throws:
    
    DbException - if the column was not found
  - doesColumnExist
```
public boolean doesColumnExist(java.lang.String columnName)
```
    Does the column with the given name exist?
    
    Parameters:
    
    columnName - the column name
    
    Returns:
    
    true if the column exists
  - getBestPlanItem
```
public PlanItem getBestPlanItem(Session session,
                                int[] masks,
                                TableFilter[] filters,
                                int filter,
                                SortOrder sortOrder,
                                java.util.HashSet<Column> allColumnsSet)
```
    Get the best plan for the given search mask.
    
    Parameters:
    
    session - the session
    
    masks - per-column comparison bit masks, null means 'always false', see constants in IndexCondition
    
    filters - all joined table filters
    
    filter - the current table filter index
    
    sortOrder - the sort order
    
    allColumnsSet - the set of all columns
    
    Returns:
    
    the plan item
  - findPrimaryKey
```
public Index findPrimaryKey()
```
    Get the primary key index if there is one, or null if there is none.
    
    Returns:
    
    the primary key index or null
  - getPrimaryKey
```
public Index getPrimaryKey()
```
  - validateConvertUpdateSequence
```
public void validateConvertUpdateSequence(Session session,
                                          Row row)
```
    Validate all values in this row, convert the values if required, and update the sequence values if required. This call will also set the default values if required and set the computed column if there are any.
    
    Parameters:
    
    session - the session
    
    row - the row
  - removeIndex
```
public void removeIndex(Index index)
```
    Remove the given index from the list.
    
    Parameters:
    
    index - the index to remove
  - removeDependentView
```
public void removeDependentView(TableView view)
```
    Remove the given view from the dependent views list.
    
    Parameters:
    
    view - the view to remove
  - removeSynonym
```
public void removeSynonym(TableSynonym synonym)
```
    Remove the given view from the list.
    
    Parameters:
    
    synonym - the synonym to remove
  - removeConstraint
```
public void removeConstraint(Constraint constraint)
```
    Remove the given constraint from the list.
    
    Parameters:
    
    constraint - the constraint to remove
  - removeSequence
```
public final void removeSequence(Sequence sequence)
```
    Remove a sequence from the table. Sequences are used as identity columns.
    
    Parameters:
    
    sequence - the sequence to remove
  - removeTrigger
```
public void removeTrigger(TriggerObject trigger)
```
    Remove the given trigger from the list.
    
    Parameters:
    
    trigger - the trigger to remove
  - addDependentView
```
public void addDependentView(TableView view)
```
    Add a view to this table.
    
    Parameters:
    
    view - the view to add
  - addSynonym
```
public void addSynonym(TableSynonym synonym)
```
    Add a synonym to this table.
    
    Parameters:
    
    synonym - the synonym to add
  - addConstraint
```
public void addConstraint(Constraint constraint)
```
    Add a constraint to the table.
    
    Parameters:
    
    constraint - the constraint to add
  - getConstraints
```
public java.util.ArrayList<Constraint> getConstraints()
```
  - addSequence
```
public void addSequence(Sequence sequence)
```
    Add a sequence to this table.
    
    Parameters:
    
    sequence - the sequence to add
  - addTrigger
```
public void addTrigger(TriggerObject trigger)
```
    Add a trigger to this table.
    
    Parameters:
    
    trigger - the trigger to add
  - fire
```
public void fire(Session session,
                 int type,
                 boolean beforeAction)
```
    Fire the triggers for this table.
    
    Parameters:
    
    session - the session
    
    type - the trigger type
    
    beforeAction - whether 'before' triggers should be called
  - hasSelectTrigger
```
public boolean hasSelectTrigger()
```
    Check whether this table has a select trigger.
    
    Returns:
    
    true if it has
  - fireRow
```
public boolean fireRow()
```
    Check if row based triggers or constraints are defined. In this case the fire after and before row methods need to be called.
    
    Returns:
    
    if there are any triggers or rows defined
  - fireBeforeRow
```
public boolean fireBeforeRow(Session session,
                             Row oldRow,
                             Row newRow)
```
    Fire all triggers that need to be called before a row is updated.
    
    Parameters:
    
    session - the session
    
    oldRow - the old data or null for an insert
    
    newRow - the new data or null for a delete
    
    Returns:
    
    true if no further action is required (for 'instead of' triggers)
  - fireAfterRow
```
public void fireAfterRow(Session session,
                         Row oldRow,
                         Row newRow,
                         boolean rollback)
```
    Fire all triggers that need to be called after a row is updated.
    
    Parameters:
    
    session - the session
    
    oldRow - the old data or null for an insert
    
    newRow - the new data or null for a delete
    
    rollback - when the operation occurred within a rollback
  - isGlobalTemporary
```
public boolean isGlobalTemporary()
```
  - canTruncate
```
public boolean canTruncate()
```
    Check if this table can be truncated.
    
    Returns:
    
    true if it can
  - setCheckForeignKeyConstraints
```
public void setCheckForeignKeyConstraints(Session session,
                                          boolean enabled,
                                          boolean checkExisting)
```
    Enable or disable foreign key constraint checking for this table.
    
    Parameters:
    
    session - the session
    
    enabled - true if checking should be enabled
    
    checkExisting - true if existing rows must be checked during this call
  - getCheckForeignKeyConstraints
```
public boolean getCheckForeignKeyConstraints()
```
  - getIndexForColumn
```
public Index getIndexForColumn(Column column,
                               boolean needGetFirstOrLast,
                               boolean needFindNext)
```
    Get the index that has the given column as the first element. This method returns null if no matching index is found.
    
    Parameters:
    
    column - the column
    
    needGetFirstOrLast - if the returned index must be able to do Index.canGetFirstOrLast()
    
    needFindNext - if the returned index must be able to do Index.findNext(Session, SearchRow, SearchRow)
    
    Returns:
    
    the index or null
  - getOnCommitDrop
```
public boolean getOnCommitDrop()
```
  - setOnCommitDrop
```
public void setOnCommitDrop(boolean onCommitDrop)
```
  - getOnCommitTruncate
```
public boolean getOnCommitTruncate()
```
  - setOnCommitTruncate
```
public void setOnCommitTruncate(boolean onCommitTruncate)
```
  - removeIndexOrTransferOwnership
```
public void removeIndexOrTransferOwnership(Session session,
                                           Index index)
```
    If the index is still required by a constraint, transfer the ownership to it. Otherwise, the index is removed.
    
    Parameters:
    
    session - the session
    
    index - the index that is no longer required
  - checkDeadlock
```
public java.util.ArrayList<Session> checkDeadlock(Session session,
                                                  Session clash,
                                                  java.util.Set<Session> visited)
```
    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.
    
    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
  - isPersistIndexes
```
public boolean isPersistIndexes()
```
  - isPersistData
```
public boolean isPersistData()
```
  - compareTypeSafe
```
public int compareTypeSafe(Value a,
                           Value b)
```
    Compare two values with the current comparison mode. The values may be of different type.
    
    Parameters:
    
    a - the first value
    
    b - the second value
    
    Returns:
    
    0 if both values are equal, -1 if the first value is smaller, and 1 otherwise
  - getCompareMode
```
public CompareMode getCompareMode()
```
  - checkWritingAllowed
```
public void checkWritingAllowed()
```
    Tests if the table can be written. Usually, this depends on the database.checkWritingAllowed method, but some tables (eg. TableLink) overwrite this default behaviour.
  - getDefaultValue
```
public Value getDefaultValue(Session session,
                             Column column)
```
    Get or generate a default value for the given column.
    
    Parameters:
    
    session - the session
    
    column - the column
    
    Returns:
    
    the value
  - getOnUpdateValue
```
public Value getOnUpdateValue(Session session,
                              Column column)
```
    Generates on update value for the given column.
    
    Parameters:
    
    session - the session
    
    column - the column
    
    Returns:
    
    the value
  - isHidden
```
public boolean isHidden()
```
    Description copied from interface: SchemaObject
    
    Check whether this is a hidden object that doesn't appear in the meta data and in the script, and is not dropped on DROP ALL OBJECTS.
    
    Specified by:
    
    isHidden in interface SchemaObject
    
    Overrides:
    
    isHidden in class SchemaObjectBase
    
    Returns:
    
    true if it is hidden
  - setHidden
```
public void setHidden(boolean hidden)
```
  - isMVStore
```
public boolean isMVStore()
```
  - setTableExpression
```
public void setTableExpression(boolean tableExpression)
```
  - isTableExpression
```
public boolean isTableExpression()
```

Class Table

Field Summary

Fields inherited from class org.h2.engine.DbObjectBase

Fields inherited from interface org.h2.engine.DbObject

Constructor Summary

Method Summary

Methods inherited from class org.h2.schema.SchemaObjectBase

Methods inherited from class org.h2.engine.DbObjectBase

Methods inherited from class java.lang.Object

Methods inherited from interface org.h2.engine.DbObject

Field Detail

TYPE_CACHED

TYPE_MEMORY

columns

compareMode

isHidden

Constructor Detail

Table

Method Detail

rename

isView

lock

close

unlock

addIndex

getRow

removeRow

truncate

addRow

commit

checkSupportAlter

getTableType

getScanIndex

getScanIndex

getUniqueIndex

getIndexes

getIndex

isLockedExclusively

getMaxDataModificationId

isDeterministic

canGetRowCount

canReference

canDrop

getRowCount

getRowCountApproximation

getDiskSpaceUsed

getRowIdColumn

getCreateSQLForCopy

isQueryComparable

addDependencies

getChildren

setColumns

renameColumn

isLockedExclusivelyBy

updateRows

getDependentViews

removeChildrenAndResources

dropMultipleColumnsConstraintsAndIndexes

getTemplateRow

getTemplateSimpleRow

getColumns

getType

getColumn

getColumn

doesColumnExist

getBestPlanItem

findPrimaryKey

getPrimaryKey

validateConvertUpdateSequence

removeIndex

removeDependentView

removeSynonym

removeConstraint

removeSequence

removeTrigger

addDependentView

addSynonym

addConstraint

getConstraints

addSequence