org.h2.mvstore.db

类 MVSecondaryIndex

java.lang.Object

org.h2.engine.DbObjectBase

org.h2.schema.SchemaObjectBase

org.h2.index.BaseIndex

org.h2.mvstore.db.MVSecondaryIndex

所有已实现的接口:

DbObject, Index, MVIndex, SchemaObject

public class MVSecondaryIndex
extends BaseIndex
implements MVIndex

A table stored in a MVStore.

字段概要

从类继承的字段 org.h2.index.BaseIndex

columnIds, columns, indexColumns, indexType, isMultiVersion, table

从类继承的字段 org.h2.engine.DbObjectBase

comment, database, trace

从接口继承的字段 org.h2.engine.DbObject

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

构造器概要

构造器

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

方法概要

限定符和类型	方法和说明
void	add(Session 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).
boolean	canFindNext() Check if the index can get the next higher value.
boolean	canGetFirstOrLast() Check if the index can directly look up the lowest or highest value of a column.
void	checkRename() Check if this object can be renamed.
void	close(Session session) Close this index.
Cursor	find(Session session, SearchRow first, SearchRow last) Find a row or a list of rows and create a cursor to iterate over the result.
Cursor	findFirstOrLast(Session session, boolean first) Find the first (or last) value of this index.
Cursor	findNext(Session session, SearchRow higherThan, SearchRow last) Find a row or a list of rows that is larger and create a cursor to iterate over the result.
double	getCost(Session session, int[] masks, TableFilter[] filters, int filter, SortOrder sortOrder, HashSet<Column> allColumnsSet) Estimate the cost to search for rows given the search mask.
long	getDiskSpaceUsed() Get the used disk space for this index.
long	getRowCount(Session session) Get the row count of this table, for the given session.
long	getRowCountApproximation() 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(Session session) Remove the index.
void	remove(Session session, Row row) Remove a row from the index.
void	truncate(Session session) Remove all rows from the index.

从类继承的方法 org.h2.index.BaseIndex

canScan, checkIndexColumnTypes, commit, compareRows, containsNullAndAllowMultipleNull, createLookupBatch, find, getColumnIndex, getColumns, getCostRangeIndex, getCreateSQL, getCreateSQLForCopy, getDropSQL, getDuplicateKeyException, getIndexColumns, getIndexType, getPlanSQL, getRow, getType, initBaseIndex, isHidden, isRowIdIndex, removeChildrenAndResources, setSortedInsertMode

从类继承的方法 org.h2.schema.SchemaObjectBase

getSchema, getSQL, initSchemaObjectBase

从类继承的方法 org.h2.engine.DbObjectBase

getChildren, getComment, getDatabase, getId, getModificationId, getName, initDbObjectBase, 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.index.Index

canScan, commit, compareRows, createLookupBatch, find, getColumnIndex, getColumns, getIndexColumns, getIndexType, getPlanSQL, getRow, isRowIdIndex, setSortedInsertMode

从接口继承的方法 org.h2.schema.SchemaObject

getSchema, isHidden

从接口继承的方法 org.h2.engine.DbObject

getChildren, getComment, getCreateSQL, getCreateSQLForCopy, getDatabase, getDropSQL, getId, getName, getSQL, getType, isTemporary, removeChildrenAndResources, rename, setComment, setTemporary

构造器详细资料

MVSecondaryIndex

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

方法详细资料

addRowsToBuffer

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

从接口复制的说明: 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 在接口中 MVIndex

参数:

rows - the rows

bufferName - the name of the temporary storage

addBufferedRows

public void addBufferedRows(List<String> bufferNames)

从接口复制的说明: 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 在接口中 MVIndex

参数:

bufferNames - the names of the temporary storage

close

public void close(Session session)

从接口复制的说明: Index

Close this index.

指定者:

close 在接口中 Index

参数:

session - the session used to write data

add

public void add(Session session,
                Row row)

从接口复制的说明: Index

Add a row to the index.

指定者:

add 在接口中 Index

参数:

session - the session to use

row - the row to add

remove

public void remove(Session session,
                   Row row)

从接口复制的说明: Index

Remove a row from the index.

指定者:

remove 在接口中 Index

参数:

session - the session

row - the row

find

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

从接口复制的说明: Index

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

指定者:

find 在接口中 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

getTable

public MVTable getTable()

从接口复制的说明: Index

Get the table on which this index is based.

指定者:

getTable 在接口中 Index

覆盖:

getTable 在类中 BaseIndex

返回:

the table

getCost

public double getCost(Session session,
                      int[] masks,
                      TableFilter[] filters,
                      int filter,
                      SortOrder sortOrder,
                      HashSet<Column> allColumnsSet)

从接口复制的说明: 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 在接口中 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

remove

public void remove(Session session)

从接口复制的说明: Index

Remove the index.

指定者:

remove 在接口中 Index

参数:

session - the session

truncate

public void truncate(Session session)

从接口复制的说明: Index

Remove all rows from the index.

指定者:

truncate 在接口中 Index

参数:

session - the session

canGetFirstOrLast

public boolean canGetFirstOrLast()

从接口复制的说明: Index

Check if the index can directly look up the lowest or highest value of a column.

指定者:

canGetFirstOrLast 在接口中 Index

返回:

true if it can

findFirstOrLast

public Cursor findFirstOrLast(Session session,
                              boolean first)

从接口复制的说明: Index

Find the first (or last) value of this index. The cursor returned is positioned on the correct row, or on null if no row has been found.

指定者:

findFirstOrLast 在接口中 Index

参数:

session - the session

first - true if the first (lowest for ascending indexes) or last value should be returned

返回:

a cursor (never null)

needRebuild

public boolean needRebuild()

从接口复制的说明: Index

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

指定者:

needRebuild 在接口中 Index

返回:

true if a rebuild is required.

getRowCount

public long getRowCount(Session session)

从接口复制的说明: Index

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

指定者:

getRowCount 在接口中 Index

参数:

session - the session

返回:

the row count

getRowCountApproximation

public long getRowCountApproximation()

从接口复制的说明: Index

Get the approximated row count for this table.

指定者:

getRowCountApproximation 在接口中 Index

返回:

the approximated row count

getDiskSpaceUsed

public long getDiskSpaceUsed()

从接口复制的说明: Index

Get the used disk space for this index.

指定者:

getDiskSpaceUsed 在接口中 Index

返回:

the estimated number of bytes

canFindNext

public boolean canFindNext()

从接口复制的说明: Index

Check if the index can get the next higher value.

指定者:

canFindNext 在接口中 Index

覆盖:

canFindNext 在类中 BaseIndex

返回:

true if it can

findNext

public Cursor findNext(Session session,
                       SearchRow higherThan,
                       SearchRow last)

从类复制的说明: BaseIndex

Find a row or a list of rows that is larger and create a cursor to iterate over the result. The base implementation doesn't support this feature.

指定者:

findNext 在接口中 Index

覆盖:

findNext 在类中 BaseIndex

参数:

session - the session

higherThan - the lower limit (excluding)

last - the last row, or null for no limit

返回:

the cursor

checkRename

public void checkRename()

从类复制的说明: DbObjectBase

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

指定者:

checkRename 在接口中 DbObject

指定者:

checkRename 在类中 DbObjectBase