Package org.h2.table

Class MaterializedView

java.lang.Object

org.h2.engine.DbObject

org.h2.schema.SchemaObject

org.h2.table.Table

org.h2.table.MaterializedView

All Implemented Interfaces:

HasSQL

public class MaterializedView
extends Table

A materialized view.

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
MaterializedView(Schema schema, int id, String name, Table table, Query query, String querySQL)

Method Summary

Modifier and Type	Method	Description
final void	addDependencies(HashSet<DbObject> dependencies)	Add all objects that this table depends on to the hash set.
final Index	addIndex(SessionLocal session, String indexName, int indexId, IndexColumn[] cols, int uniqueColumnCount, IndexType indexType, boolean create, String indexComment)	Create an index for this table
final void	addRow(SessionLocal session, Row row)	Add a row to the table and all indexes.
boolean	canDrop()	Check if this table can be dropped.
final boolean	canGetRowCount(SessionLocal session)	Check if the row count can be retrieved quickly.
final boolean	canReference()	Check if this table can be referenced.
final void	checkSupportAlter()	Check if this table supports ALTER TABLE.
final void	close(SessionLocal session)	Close the table object and flush changes.
final PlanItem	getBestPlanItem(SessionLocal session, int[] masks, TableFilter[] filters, int filter, SortOrder sortOrder, AllColumnsForPlan allColumnsSet)	Get the best plan for the given search mask.
String	getCreateSQL()	Construct the CREATE ...
String	getCreateSQL(boolean orReplace, boolean force)	Generate "CREATE" SQL statement for the materialized view.
String	getCreateSQLForCopy(Table table, 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
String	getDropSQL()	Construct a DROP ...
final ArrayList<Index>	getIndexes()	Get all indexes for this table.
long	getMaxDataModificationId()	Get the last data modification id.
String	getQuerySQL()
final long	getRowCount(SessionLocal session)	Get the row count for this table.
final long	getRowCountApproximation(SessionLocal session)	Get the approximated row count for this table.
final Index	getScanIndex(SessionLocal session)	Get the scan index to iterate through all rows.
Index	getScanIndex(SessionLocal session, int[] masks, TableFilter[] filters, int filter, SortOrder sortOrder, AllColumnsForPlan allColumnsSet)	Get the scan index for this table.
Query	getSelect()
StringBuilder	getSQL(StringBuilder builder, int sqlFlags)	Appends the SQL statement of this object to the specified builder.
TableType	getTableType()	Get the table type name
Table	getUnderlyingTable()
boolean	isDeterministic()	Check if the table is deterministic.
final boolean	isInsertable()	Returns whether this table is insertable.
boolean	isQueryComparable()	Check whether the table (or view) contains no columns that prevent index conditions to be used.
final boolean	isView()
void	removeChildrenAndResources(SessionLocal session)	Delete all dependent children objects and resources of this object.
final void	removeRow(SessionLocal session, Row row)	Remove a row from the table and all indexes.
void	replace(Table table, Query query, String querySQL)
final long	truncate(SessionLocal session)	Remove all rows from the table and indexes.

Methods inherited from class org.h2.table.Table

addConstraint, addDependentMaterializedView, addDependentView, addSequence, addSynonym, addTrigger, canTruncate, checkDeadlock, checkWritingAllowed, compareValues, convertInsertRow, convertUpdateRow, createRow, doesColumnExist, dropMultipleColumnsConstraintsAndIndexes, findColumn, findPrimaryKey, fire, fireAfterRow, fireBeforeRow, fireRow, getCheckForeignKeyConstraints, getChildren, getColumn, getColumn, getColumn, getColumns, getCompareMode, getConstraints, getDependentMaterializedViews, getDependentViews, getDiskSpaceUsed, getIdentityColumn, getIndex, getIndexForColumn, getMainIndexColumn, getNullRow, getOnCommitDrop, getOnCommitTruncate, getPrimaryKey, getRow, getRowFactory, getRowIdColumn, getSQLTableType, getTemplateRow, getTemplateSimpleRow, getTriggers, getType, getVisibleColumns, hasSelectTrigger, isGlobalTemporary, isLockedExclusively, isLockedExclusivelyBy, isPersistData, isPersistIndexes, isRowLockable, lock, lockRow, 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

checkRename, getComment, getCreateSQLForMeta, 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.util.HasSQL

getTraceSQL

Constructor Details

MaterializedView

public MaterializedView(Schema schema,
 int id,
 String name,
 Table table,
 Query query,
 String querySQL)

Method Details

replace

public void replace(Table table,
 Query query,
 String querySQL)

getUnderlyingTable

public Table getUnderlyingTable()

getSelect

public Query getSelect()

close

public final void close(SessionLocal session)

Description copied from class: Table

Close the table object and flush changes.

Specified by:

close in class Table

Parameters:

session - the session

addIndex

public final Index addIndex(SessionLocal session,
 String indexName,
 int indexId,
 IndexColumn[] cols,
 int uniqueColumnCount,
 IndexType indexType,
 boolean create,
 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

uniqueColumnCount - the count of unique columns

indexType - the index type

create - whether this is a new index

indexComment - the comment

Returns:

the index

isView

public final boolean isView()

Overrides:

isView in class Table

getBestPlanItem

public final PlanItem getBestPlanItem(SessionLocal session,
 int[] masks,
 TableFilter[] filters,
 int filter,
 SortOrder sortOrder,
 AllColumnsForPlan allColumnsSet)

Description copied from class: Table

Get the best plan for the given search mask.

Overrides:

getBestPlanItem in class Table

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

isQueryComparable

public boolean isQueryComparable()

Description copied from class: Table

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.

Overrides:

isQueryComparable in class Table

Returns:

true if the table contains no query-comparable column

isInsertable

public final boolean isInsertable()

Description copied from class: Table

Returns whether this table is insertable.

Overrides:

isInsertable in class Table

Returns:

whether this table is insertable

removeRow

public final void removeRow(SessionLocal 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

addRow

public final void addRow(SessionLocal 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 final void checkSupportAlter()

Description copied from class: Table

Check if this table supports ALTER TABLE.

Specified by:

checkSupportAlter in class Table

truncate

public final long truncate(SessionLocal session)

Description copied from class: Table

Remove all rows from the table and indexes.

Specified by:

truncate in class Table

Parameters:

session - the session

Returns:

number of removed rows, possibly including uncommitted rows

getRowCount

public final 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

canGetRowCount

public final 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

getRowCountApproximation

public final 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

canReference

public final boolean canReference()

Description copied from class: Table

Check if this table can be referenced.

Overrides:

canReference in class Table

Returns:

true if it can

getIndexes

public final 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

getScanIndex

public final Index getScanIndex(SessionLocal session)

Description copied from class: Table

Get the scan index to iterate through all rows.

Specified by:

getScanIndex in class Table

Parameters:

session - the session

Returns:

the index

getScanIndex

public Index getScanIndex(SessionLocal session,
 int[] masks,
 TableFilter[] filters,
 int filter,
 SortOrder sortOrder,
 AllColumnsForPlan allColumnsSet)

Description copied from class: Table

Get the scan index for this table.

Overrides:

getScanIndex in class 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

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

addDependencies

public final void addDependencies(HashSet<DbObject> dependencies)

Description copied from class: Table

Add all objects that this table depends on to the hash set.

Overrides:

addDependencies in class Table

Parameters:

dependencies - the current set of dependencies

getDropSQL

public String getDropSQL()

Description copied from class: DbObject

Construct a DROP ... SQL statement for this object.

Overrides:

getDropSQL in class DbObject

Returns:

the SQL statement

getCreateSQLForCopy

public String getCreateSQLForCopy(Table table,
 String quotedName)

Description copied from class: 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

Overrides:

getCreateSQLForCopy in class DbObject

Parameters:

table - the new table

quotedName - the quoted name

Returns:

the SQL statement

getCreateSQL

public String getCreateSQL()

Description copied from class: DbObject

Construct the CREATE ... SQL statement for this object.

Specified by:

getCreateSQL in class DbObject

Returns:

the SQL statement

getCreateSQL

public String getCreateSQL(boolean orReplace,
 boolean force)

Generate "CREATE" SQL statement for the materialized view.

Parameters:

orReplace - if true, then include the OR REPLACE clause

force - if true, then include the FORCE clause

Returns:

the SQL statement

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

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

removeChildrenAndResources

public void removeChildrenAndResources(SessionLocal session)

Description copied from class: DbObject

Delete all dependent children objects and resources of this object.

Overrides:

removeChildrenAndResources in class Table

Parameters:

session - the session

getSQL

public StringBuilder getSQL(StringBuilder builder,
 int sqlFlags)

Description copied from interface: HasSQL

Appends the SQL statement of this object to the specified builder.

Specified by:

getSQL in interface HasSQL

Overrides:

getSQL in class SchemaObject

Parameters:

builder - string builder

sqlFlags - formatting flags

Returns:

the specified string builder

getQuerySQL

public String getQuerySQL()

getMaxDataModificationId

public long getMaxDataModificationId()

Description copied from class: Table

Get the last data modification id.

Specified by:

getMaxDataModificationId in class Table

Returns:

the modification id