Package org.h2.mvstore.db
Class MVDelegateIndex
- java.lang.Object
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- org.h2.engine.DbObject
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- org.h2.schema.SchemaObject
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- org.h2.index.Index
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- org.h2.mvstore.db.MVIndex<java.lang.Long,SearchRow>
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- org.h2.mvstore.db.MVDelegateIndex
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Field Summary
Fields Modifier and Type Field Description private MVPrimaryIndex
mainIndex
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Fields inherited from class org.h2.index.Index
columnIds, columns, indexColumns, indexType, table, uniqueColumnColumn
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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
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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
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Constructor Summary
Constructors Constructor Description MVDelegateIndex(MVTable table, int id, java.lang.String name, MVPrimaryIndex mainIndex, IndexType indexType)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
add(SessionLocal session, Row row)
Add a row to the index.void
addBufferedRows(java.util.List<java.lang.String> bufferNames)
Add all the index data from the buffers to the index.void
addRowsToBuffer(java.util.List<Row> rows, java.lang.String bufferName)
Add the rows to a temporary storage (not to the index yet).boolean
canGetFirstOrLast()
Check if the index can directly look up the lowest or highest value of a column.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
findFirstOrLast(SessionLocal session, boolean first)
Find the first (or last) value of this index.int
getColumnIndex(Column col)
Get the index of a column in the list of index columnsdouble
getCost(SessionLocal session, int[] masks, TableFilter[] filters, int filter, SortOrder sortOrder, AllColumnsForPlan allColumnsSet)
Estimate the cost to search for rows given the search mask.MVMap<java.lang.Long,VersionedValue<SearchRow>>
getMVMap()
Row
getRow(SessionLocal session, long key)
Get the row with the given key.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.RowFactory
getRowFactory()
boolean
isFirstColumn(Column column)
Check if the given column is the first for this indexboolean
isRowIdIndex()
Does this index support lookup by row id?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.void
update(SessionLocal session, Row oldRow, Row newRow)
Update index after row change.-
Methods inherited from class org.h2.index.Index
canFindNext, canScan, checkIndexColumnTypes, compareRows, findNext, getColumns, getCostRangeIndex, getCreateSQL, getCreateSQLForCopy, getDiskSpaceUsed, getDuplicateKeyException, getDuplicatePrimaryKeyMessage, getIndexColumns, getIndexType, getPlanSQL, getTable, getType, getUniqueColumnCount, getUniqueRowFactory, isFindUsingFullTableScan, isHidden, mayHaveNullDuplicates, removeChildrenAndResources
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Methods inherited from class org.h2.schema.SchemaObject
getSchema, getSQL, getSQL
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Methods inherited from class org.h2.engine.DbObject
checkRename, getChildren, getComment, getCreateSQLForMeta, getDatabase, getDropSQL, getId, getModificationId, getName, invalidate, isTemporary, isValid, rename, setComment, setModified, setObjectName, setTemporary, toString
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
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Methods inherited from interface org.h2.util.HasSQL
getTraceSQL
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Field Detail
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mainIndex
private final MVPrimaryIndex mainIndex
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Constructor Detail
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MVDelegateIndex
public MVDelegateIndex(MVTable table, int id, java.lang.String name, MVPrimaryIndex mainIndex, IndexType indexType)
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Method Detail
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getRowFactory
public RowFactory getRowFactory()
- Overrides:
getRowFactory
in classIndex
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addRowsToBuffer
public void addRowsToBuffer(java.util.List<Row> rows, java.lang.String bufferName)
Description copied from class: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.- Specified by:
addRowsToBuffer
in classMVIndex<java.lang.Long,SearchRow>
- Parameters:
rows
- the rowsbufferName
- the name of the temporary storage
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addBufferedRows
public void addBufferedRows(java.util.List<java.lang.String> bufferNames)
Description copied from class: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.- Specified by:
addBufferedRows
in classMVIndex<java.lang.Long,SearchRow>
- Parameters:
bufferNames
- the names of the temporary storage
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getMVMap
public MVMap<java.lang.Long,VersionedValue<SearchRow>> getMVMap()
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add
public void add(SessionLocal session, Row row)
Description copied from class:Index
Add a row to the index.
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getRow
public Row getRow(SessionLocal session, long key)
Description copied from class:Index
Get the row with the given key.
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isRowIdIndex
public boolean isRowIdIndex()
Description copied from class:Index
Does this index support lookup by row id?- Overrides:
isRowIdIndex
in classIndex
- Returns:
- true if it does
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canGetFirstOrLast
public boolean canGetFirstOrLast()
Description copied from class:Index
Check if the index can directly look up the lowest or highest value of a column.- Overrides:
canGetFirstOrLast
in classIndex
- Returns:
- true if it can
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close
public void close(SessionLocal session)
Description copied from class:Index
Close this index.
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find
public Cursor find(SessionLocal session, SearchRow first, SearchRow last)
Description copied from class:Index
Find a row or a list of rows and create a cursor to iterate over the result.
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findFirstOrLast
public Cursor findFirstOrLast(SessionLocal session, boolean first)
Description copied from class: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.- Overrides:
findFirstOrLast
in classIndex
- Parameters:
session
- the sessionfirst
- true if the first (lowest for ascending indexes) or last value should be returned- Returns:
- a cursor (never null)
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getColumnIndex
public int getColumnIndex(Column col)
Description copied from class:Index
Get the index of a column in the list of index columns- Overrides:
getColumnIndex
in classIndex
- Parameters:
col
- the column- Returns:
- the index (0 meaning first column)
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isFirstColumn
public boolean isFirstColumn(Column column)
Description copied from class:Index
Check if the given column is the first for this index- Overrides:
isFirstColumn
in classIndex
- Parameters:
column
- the column- Returns:
- true if the given columns is the first
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getCost
public double getCost(SessionLocal session, int[] masks, TableFilter[] filters, int filter, SortOrder sortOrder, AllColumnsForPlan allColumnsSet)
Description copied from class: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.- Specified by:
getCost
in classIndex
- Parameters:
session
- the sessionmasks
- per-column comparison bit masks, null means 'always false', see constants in IndexConditionfilters
- all joined table filtersfilter
- the current table filter indexsortOrder
- the sort orderallColumnsSet
- the set of all columns- Returns:
- the estimated cost
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needRebuild
public boolean needRebuild()
Description copied from class:Index
Check if the index needs to be rebuilt. This method is called after opening an index.- Specified by:
needRebuild
in classIndex
- Returns:
- true if a rebuild is required.
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remove
public void remove(SessionLocal session, Row row)
Description copied from class:Index
Remove a row from the index.
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update
public void update(SessionLocal session, Row oldRow, Row newRow)
Description copied from class:Index
Update index after row change.
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remove
public void remove(SessionLocal session)
Description copied from class:Index
Remove the index.
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truncate
public void truncate(SessionLocal session)
Description copied from class:Index
Remove all rows from the index.
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getRowCount
public long getRowCount(SessionLocal session)
Description copied from class:Index
Get the row count of this table, for the given session.- Specified by:
getRowCount
in classIndex
- Parameters:
session
- the session- Returns:
- the row count
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getRowCountApproximation
public long getRowCountApproximation(SessionLocal session)
Description copied from class:Index
Get the approximated row count for this table.- Specified by:
getRowCountApproximation
in classIndex
- Parameters:
session
- the session- Returns:
- the approximated row count
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