public class PageBtreeIndex extends PageIndex
rootPageId
columnIds, columns, indexColumns, indexType, isMultiVersion, table
comment, database, trace
AGGREGATE, COMMENT, CONSTANT, CONSTRAINT, FUNCTION_ALIAS, INDEX, RIGHT, ROLE, SCHEMA, SEQUENCE, SETTING, TABLE_OR_VIEW, TRIGGER, USER, USER_DATATYPE
Constructor and Description |
---|
PageBtreeIndex(RegularTable table,
int id,
String indexName,
IndexColumn[] columns,
IndexType indexType,
boolean create,
Session session) |
Modifier and Type | Method and Description |
---|---|
void |
add(Session session,
Row row)
Add a row to the index.
|
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 first,
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)
Estimate the cost to search for rows given the search mask.
|
Row |
getRow(Session session,
long key)
Get a row from the main 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.
|
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.
|
void |
writeRowCount()
Write back the row count if it has changed.
|
getRootPageId, setSortedInsertMode
canScan, commit, compareRows, find, getColumnIndex, getColumns, getCreateSQL, getCreateSQLForCopy, getDropSQL, getIndexColumns, getIndexType, getPlanSQL, getTable, getType, initBaseIndex, isHidden, isRowIdIndex, removeChildrenAndResources
getSchema, getSQL, initSchemaObjectBase
getChildren, getComment, getDatabase, getId, getModificationId, getName, initDbObjectBase, invalidate, isTemporary, rename, setComment, setModified, setObjectName, setTemporary, toString
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
getSchema
getChildren, getComment, getDatabase, getId, getName, getSQL, isTemporary, rename, setComment, setTemporary
public PageBtreeIndex(RegularTable table, int id, String indexName, IndexColumn[] columns, IndexType indexType, boolean create, Session session)
public void add(Session session, Row row)
Index
session
- the session to userow
- the row to addpublic boolean canGetFirstOrLast()
Index
public Cursor findNext(Session session, SearchRow first, SearchRow last)
BaseIndex
public Cursor find(Session session, SearchRow first, SearchRow last)
Index
session
- the sessionfirst
- the first row, or null for no limitlast
- the last row, or null for no limitpublic Cursor findFirstOrLast(Session session, boolean first)
Index
session
- the sessionfirst
- true if the first (lowest for ascending indexes) or last
value should be returnedpublic double getCost(Session session, int[] masks)
Index
session
- the sessionmasks
- the search maskpublic boolean needRebuild()
Index
public void remove(Session session, Row row)
Index
session
- the sessionrow
- the rowpublic void remove(Session session)
Index
session
- the sessionpublic void truncate(Session session)
Index
session
- the sessionpublic void checkRename()
DbObjectBase
checkRename
in interface DbObject
checkRename
in class DbObjectBase
public long getRowCountApproximation()
Index
public long getRowCount(Session session)
Index
session
- the sessionpublic void close(Session session)
Index
session
- the session used to write datapublic boolean canFindNext()
Index
canFindNext
in interface Index
canFindNext
in class BaseIndex
public void writeRowCount()
PageIndex
writeRowCount
in class PageIndex
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