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java.lang.Objectorg.h2.engine.DbObjectBase
org.h2.schema.SchemaObjectBase
org.h2.index.BaseIndex
org.h2.index.ViewIndex
public class ViewIndex
This object represents a virtual index for a query. Actually it only represents a prepared SELECT statement.
Field Summary |
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Fields inherited from class org.h2.index.BaseIndex |
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columnIds, columns, indexColumns, indexType, isMultiVersion, table |
Fields inherited from class org.h2.engine.DbObjectBase |
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comment, database, trace |
Fields inherited from interface org.h2.engine.DbObject |
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AGGREGATE, COMMENT, CONSTANT, CONSTRAINT, FUNCTION_ALIAS, INDEX, RIGHT, ROLE, SCHEMA, SEQUENCE, SETTING, TABLE_OR_VIEW, TRIGGER, USER, USER_DATATYPE |
Constructor Summary | |
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ViewIndex(TableView view,
java.lang.String querySQL,
java.util.ArrayList<Parameter> originalParameters,
boolean recursive)
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ViewIndex(TableView view,
ViewIndex index,
Session session,
int[] masks)
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Method Summary | |
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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. |
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 |
findByGeometry(TableFilter filter,
SearchRow intersection)
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,
TableFilter filter,
SortOrder sortOrder)
Estimate the cost to search for rows given the search mask. |
long |
getDiskSpaceUsed()
Get the used disk space for this index. |
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. |
Session |
getSession()
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boolean |
isRecursive()
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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 |
setRecursive(boolean value)
|
void |
truncate(Session session)
Remove all rows from the index. |
Methods inherited from class org.h2.index.BaseIndex |
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canFindNext, canScan, checkIndexColumnTypes, commit, compareRows, containsNullAndAllowMultipleNull, find, findNext, getColumnIndex, getColumns, getCostRangeIndex, getCreateSQL, getCreateSQLForCopy, getDropSQL, getDuplicateKeyException, getIndexColumns, getIndexType, getRow, getTable, getType, initBaseIndex, isHidden, isRowIdIndex, removeChildrenAndResources, setSortedInsertMode |
Methods inherited from class org.h2.schema.SchemaObjectBase |
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getSchema, getSQL, initSchemaObjectBase |
Methods inherited from class org.h2.engine.DbObjectBase |
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getChildren, getComment, getDatabase, getId, getModificationId, getName, initDbObjectBase, invalidate, isTemporary, rename, setComment, setModified, setObjectName, setTemporary, toString |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Methods inherited from interface org.h2.index.Index |
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canFindNext, canScan, commit, compareRows, find, findNext, getColumnIndex, getColumns, getIndexColumns, getIndexType, getRow, getTable, isRowIdIndex, setSortedInsertMode |
Methods inherited from interface org.h2.schema.SchemaObject |
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getSchema, isHidden |
Methods inherited from interface org.h2.engine.DbObject |
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getChildren, getComment, getCreateSQL, getCreateSQLForCopy, getDatabase, getDropSQL, getId, getName, getSQL, getType, isTemporary, removeChildrenAndResources, rename, setComment, setTemporary |
Constructor Detail |
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public ViewIndex(TableView view, java.lang.String querySQL, java.util.ArrayList<Parameter> originalParameters, boolean recursive)
public ViewIndex(TableView view, ViewIndex index, Session session, int[] masks)
Method Detail |
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public Session getSession()
public java.lang.String getPlanSQL()
Index
getPlanSQL
in interface Index
getPlanSQL
in class BaseIndex
public void close(Session session)
Index
close
in interface Index
session
- the session used to write datapublic void add(Session session, Row row)
Index
add
in interface Index
session
- the session to userow
- the row to addpublic void remove(Session session, Row row)
Index
remove
in interface Index
session
- the sessionrow
- the rowpublic double getCost(Session session, int[] masks, TableFilter filter, SortOrder sortOrder)
Index
getCost
in interface Index
session
- the sessionmasks
- per-column comparison bit masks, null means 'always false',
see constants in IndexConditionfilter
- the table filtersortOrder
- the sort order
public Cursor find(Session session, SearchRow first, SearchRow last)
Index
find
in interface Index
session
- the sessionfirst
- the first row, or null for no limitlast
- the last row, or null for no limit
public Cursor findByGeometry(TableFilter filter, SearchRow intersection)
SpatialIndex
findByGeometry
in interface SpatialIndex
filter
- the table filter (which possibly knows about additional
conditions)intersection
- the geometry which values should intersect with, or
null for anything
public void remove(Session session)
Index
remove
in interface Index
session
- the sessionpublic void truncate(Session session)
Index
truncate
in interface Index
session
- the sessionpublic void checkRename()
DbObjectBase
checkRename
in interface DbObject
checkRename
in class DbObjectBase
public boolean needRebuild()
Index
needRebuild
in interface Index
public boolean canGetFirstOrLast()
Index
canGetFirstOrLast
in interface Index
public Cursor findFirstOrLast(Session session, boolean first)
Index
findFirstOrLast
in interface Index
session
- the sessionfirst
- true if the first (lowest for ascending indexes) or last
value should be returned
public void setRecursive(boolean value)
public long getRowCount(Session session)
Index
getRowCount
in interface Index
session
- the session
public long getRowCountApproximation()
Index
getRowCountApproximation
in interface Index
public long getDiskSpaceUsed()
Index
getDiskSpaceUsed
in interface Index
public boolean isRecursive()
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