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java.lang.Objectorg.h2.engine.DbObjectBase
org.h2.schema.SchemaObjectBase
org.h2.index.BaseIndex
org.h2.index.FunctionIndex
public class FunctionIndex
An index for a function that returns a result set. This index can only scan through all rows, search is not supported.
| Field Summary |
|---|
| Fields inherited from class org.h2.index.BaseIndex |
|---|
columnIds, columns, indexColumns, indexType, isMultiVersion, table |
| Fields inherited from class org.h2.engine.DbObjectBase |
|---|
comment, database, trace |
| Fields inherited from interface org.h2.engine.DbObject |
|---|
AGGREGATE, COMMENT, CONSTANT, CONSTRAINT, FUNCTION_ALIAS, INDEX, RIGHT, ROLE, SCHEMA, SEQUENCE, SETTING, TABLE_OR_VIEW, TRIGGER, USER, USER_DATATYPE |
| Constructor Summary | |
|---|---|
FunctionIndex(FunctionTable functionTable,
IndexColumn[] columns)
|
|
| Method Summary | |
|---|---|
void |
add(Session session,
Row row)
Add a row to the index. |
boolean |
canGetFirstOrLast()
Check if the index can directly look up the lowest or highest value of a column. |
boolean |
canScan()
Can this index iterate over all rows? |
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. |
double |
getCost(Session session,
int[] masks)
Estimate the cost to search for rows given the search mask. |
java.lang.String |
getPlanSQL()
Get the message to show in a EXPLAIN statement. |
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. |
| Methods inherited from class org.h2.index.BaseIndex |
|---|
canFindNext, commit, compareRows, find, findNext, getColumnIndex, getColumns, getCreateSQL, getCreateSQLForCopy, getDropSQL, getIndexColumns, getIndexType, getRow, getTable, getType, initBaseIndex, isHidden, isRowIdIndex, removeChildrenAndResources, setSortedInsertMode |
| Methods inherited from class org.h2.schema.SchemaObjectBase |
|---|
getSchema, getSQL, initSchemaObjectBase |
| Methods inherited from class org.h2.engine.DbObjectBase |
|---|
getChildren, getComment, getDatabase, getId, getModificationId, getName, initDbObjectBase, invalidate, isTemporary, rename, 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.schema.SchemaObject |
|---|
getSchema |
| Methods inherited from interface org.h2.engine.DbObject |
|---|
getChildren, getComment, getDatabase, getId, getName, getSQL, isTemporary, rename, setComment, setTemporary |
| Constructor Detail |
|---|
public FunctionIndex(FunctionTable functionTable,
IndexColumn[] columns)
| Method Detail |
|---|
public void close(Session session)
Index
session - the session used to write data
public void add(Session session,
Row row)
Index
session - the session to userow - the row to add
public void remove(Session session,
Row row)
Index
session - the sessionrow - the row
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 limit
public double getCost(Session session,
int[] masks)
Index
session - the sessionmasks - the search mask
public void remove(Session session)
Index
session - the sessionpublic void truncate(Session session)
Index
session - the sessionpublic boolean needRebuild()
Index
public void checkRename()
DbObjectBase
checkRename in interface DbObjectcheckRename in class DbObjectBasepublic boolean canGetFirstOrLast()
Index
public Cursor findFirstOrLast(Session session,
boolean first)
Index
session - the sessionfirst - true if the first (lowest for ascending indexes) or last
value should be returned
public long getRowCount(Session session)
Index
session - the session
public long getRowCountApproximation()
Index
public java.lang.String getPlanSQL()
Index
getPlanSQL in interface IndexgetPlanSQL in class BaseIndexpublic boolean canScan()
Index
canScan in interface IndexcanScan in class BaseIndex
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