org.h2.mvstore.db

类 MVSpatialIndex

java.lang.Object

org.h2.engine.DbObject

org.h2.schema.SchemaObject

org.h2.index.Index

org.h2.mvstore.db.MVIndex<Spatial,Value>

org.h2.mvstore.db.MVSpatialIndex

所有已实现的接口:

SpatialIndex, HasSQL

public class MVSpatialIndex
extends MVIndex<Spatial,Value>
implements SpatialIndex

This is an index based on a MVRTreeMap.

作者:

Thomas Mueller, Noel Grandin, Nicolas Fortin, Atelier SIG, IRSTV FR CNRS 24888

字段概要

从类继承的字段 org.h2.index.Index

columnIds, columns, indexColumns, indexType, table, uniqueColumnColumn

从类继承的字段 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

从接口继承的字段 org.h2.util.HasSQL

ADD_PLAN_INFORMATION, DEFAULT_SQL_FLAGS, NO_CASTS, QUOTE_ONLY_WHEN_REQUIRED, REPLACE_LOBS_FOR_TRACE, TRACE_SQL_FLAGS

构造器概要

构造器

构造器和说明
MVSpatialIndex(Database db, MVTable table, int id, String indexName, IndexColumn[] columns, int uniqueColumnCount, IndexType indexType) Constructor.

方法概要

限定符和类型	方法和说明
void	add(SessionLocal session, Row row) Add a row to the index.
void	addBufferedRows(List<String> bufferNames) Add all the index data from the buffers to the index.
void	addRowsToBuffer(List<Row> rows, String bufferName) Add the rows to a temporary storage (not to the index yet).
void	close(SessionLocal session) Close this index.
Cursor	find(SessionLocal session, SearchRow first, SearchRow last) Find a row or a list of rows and create a cursor to iterate over the result.
Cursor	findByGeometry(SessionLocal session, SearchRow first, SearchRow last, SearchRow intersection) Find a row or a list of rows and create a cursor to iterate over the result.
Value	getBounds(SessionLocal session) Returns the minimum bounding box that encloses all keys.
double	getCost(SessionLocal session, int[] masks, TableFilter[] filters, int filter, SortOrder sortOrder, AllColumnsForPlan allColumnsSet) Estimate the cost to search for rows given the search mask.
static long	getCostRangeIndex(int[] masks, Column[] columns) Compute spatial index cost
long	getDiskSpaceUsed() Get the used disk space for this index.
Value	getEstimatedBounds(SessionLocal session) Returns the estimated minimum bounding box that encloses all keys.
MVMap<Spatial,VersionedValue<Value>>	getMVMap()
long	getRowCount(SessionLocal session) Get the row count of this table, for the given session.
long	getRowCountApproximation(SessionLocal session) Get the approximated row count for this table.
MVTable	getTable() Get the table on which this index is based.
boolean	needRebuild() Check if the index needs to be rebuilt.
void	remove(SessionLocal session) Remove the index.
void	remove(SessionLocal session, Row row) Remove a row from the index.
void	truncate(SessionLocal session) Remove all rows from the index.

从类继承的方法 org.h2.index.Index

canFindNext, canGetFirstOrLast, canScan, checkIndexColumnTypes, compareRows, findFirstOrLast, findNext, getColumnIndex, getColumns, getCostRangeIndex, getCreateSQL, getCreateSQLForCopy, getDuplicateKeyException, getDuplicatePrimaryKeyMessage, getIndexColumns, getIndexType, getPlanSQL, getRow, getRowFactory, getType, getUniqueColumnCount, getUniqueRowFactory, isFindUsingFullTableScan, isFirstColumn, isHidden, isRowIdIndex, mayHaveNullDuplicates, removeChildrenAndResources, update

从类继承的方法 org.h2.schema.SchemaObject

getSchema, getSQL, getSQL

从类继承的方法 org.h2.engine.DbObject

checkRename, getChildren, getComment, getCreateSQLForMeta, getDatabase, getDropSQL, getId, getModificationId, getName, invalidate, isTemporary, isValid, rename, setComment, setModified, setObjectName, setTemporary, toString

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.h2.util.HasSQL

getTraceSQL

构造器详细资料

MVSpatialIndex

public MVSpatialIndex(Database db,
                      MVTable table,
                      int id,
                      String indexName,
                      IndexColumn[] columns,
                      int uniqueColumnCount,
                      IndexType indexType)

Constructor.

参数:

db - the database

table - the table instance

id - the index id

indexName - the index name

columns - the indexed columns (only one geometry column allowed)

uniqueColumnCount - count of unique columns (0 or 1)

indexType - the index type (only spatial index)

方法详细资料

addRowsToBuffer

public void addRowsToBuffer(List<Row> rows,
                            String bufferName)

从类复制的说明: MVIndex

Add the rows to a temporary storage (not to the index yet). The rows are sorted by the index columns. This is to more quickly build the index.

指定者:

addRowsToBuffer 在类中 MVIndex<Spatial,Value>

参数:

rows - the rows

bufferName - the name of the temporary storage

addBufferedRows

public void addBufferedRows(List<String> bufferNames)

从类复制的说明: MVIndex

Add all the index data from the buffers to the index. The index will typically use merge sort to add the data more quickly in sorted order.

指定者:

addBufferedRows 在类中 MVIndex<Spatial,Value>

参数:

bufferNames - the names of the temporary storage

close

public void close(SessionLocal session)

从类复制的说明: Index

Close this index.

指定者:

close 在类中 Index

参数:

session - the session used to write data

add

public void add(SessionLocal session,
                Row row)

从类复制的说明: Index

Add a row to the index.

指定者:

add 在类中 Index

参数:

session - the session to use

row - the row to add

remove

public void remove(SessionLocal session,
                   Row row)

从类复制的说明: Index

Remove a row from the index.

指定者:

remove 在类中 Index

参数:

session - the session

row - the row

find

public Cursor find(SessionLocal session,
                   SearchRow first,
                   SearchRow last)

从类复制的说明: Index

Find a row or a list of rows and create a cursor to iterate over the result.

指定者:

find 在类中 Index

参数:

session - the session

first - the first row, or null for no limit

last - the last row, or null for no limit

返回:

the cursor to iterate over the results

findByGeometry

public Cursor findByGeometry(SessionLocal session,
                             SearchRow first,
                             SearchRow last,
                             SearchRow intersection)

从接口复制的说明: SpatialIndex

Find a row or a list of rows and create a cursor to iterate over the result.

指定者:

findByGeometry 在接口中 SpatialIndex

参数:

session - the session

first - the lower bound

last - the upper bound

intersection - the geometry which values should intersect with, or null for anything

返回:

the cursor to iterate over the results

getBounds

public Value getBounds(SessionLocal session)

Returns the minimum bounding box that encloses all keys.

参数:

session - the session

返回:

the minimum bounding box that encloses all keys, or null

getEstimatedBounds

public Value getEstimatedBounds(SessionLocal session)

Returns the estimated minimum bounding box that encloses all keys. The returned value may be incorrect.

参数:

session - the session

返回:

the estimated minimum bounding box that encloses all keys, or null

getTable

public MVTable getTable()

从类复制的说明: Index

Get the table on which this index is based.

覆盖:

getTable 在类中 Index

返回:

the table

getCost

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

从类复制的说明: Index

Estimate the cost to search for rows given the search mask. There is one element per column in the search mask. For possible search masks, see IndexCondition.

指定者:

getCost 在类中 Index

参数:

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

返回:

the estimated cost

getCostRangeIndex

public static long getCostRangeIndex(int[] masks,
                                     Column[] columns)

Compute spatial index cost

参数:

masks - Search mask

columns - Table columns

返回:

Index cost hint

remove

public void remove(SessionLocal session)

从类复制的说明: Index

Remove the index.

指定者:

remove 在类中 Index

参数:

session - the session

truncate

public void truncate(SessionLocal session)

从类复制的说明: Index

Remove all rows from the index.

指定者:

truncate 在类中 Index

参数:

session - the session

needRebuild

public boolean needRebuild()

从类复制的说明: Index

Check if the index needs to be rebuilt. This method is called after opening an index.

指定者:

needRebuild 在类中 Index

返回:

true if a rebuild is required.

getRowCount

public long getRowCount(SessionLocal session)

从类复制的说明: Index

Get the row count of this table, for the given session.

指定者:

getRowCount 在类中 Index

参数:

session - the session

返回:

the row count

getRowCountApproximation

public long getRowCountApproximation(SessionLocal session)

从类复制的说明: Index

Get the approximated row count for this table.

指定者:

getRowCountApproximation 在类中 Index

参数:

session - the session

返回:

the approximated row count

getDiskSpaceUsed

public long getDiskSpaceUsed()

从类复制的说明: Index

Get the used disk space for this index.

覆盖:

getDiskSpaceUsed 在类中 Index

返回:

the estimated number of bytes

getMVMap

public MVMap<Spatial,VersionedValue<Value>> getMVMap()

指定者:

getMVMap 在类中 MVIndex<Spatial,Value>