package org.h2.mvstore.db;
import java.util.List;
import org.h2.command.dml.AllColumnsForPlan;
import org.h2.engine.Session;
import org.h2.index.BaseIndex;
import org.h2.index.Cursor;
import org.h2.index.IndexType;
import org.h2.message.DbException;
import org.h2.result.Row;
import org.h2.result.SearchRow;
import org.h2.result.SortOrder;
import org.h2.table.Column;
import org.h2.table.IndexColumn;
import org.h2.table.TableFilter;
import org.h2.value.ValueLong;
public class MVDelegateIndex extends BaseIndex implements MVIndex {
private final MVPrimaryIndex mainIndex;
public MVDelegateIndex(MVTable table, int id, String name,
MVPrimaryIndex mainIndex,
IndexType indexType) {
super(table, id, name,
IndexColumn.wrap(new Column[] { table.getColumn(mainIndex.getMainIndexColumn()) }),
indexType);
this.mainIndex = mainIndex;
if (id < 0) {
throw DbException.throwInternalError(name);
}
}
@Override
public void addRowsToBuffer(List<Row> rows, String bufferName) {
throw DbException.throwInternalError();
}
@Override
public void addBufferedRows(List<String> bufferNames) {
throw DbException.throwInternalError();
}
@Override
public void add(Session session, Row row) {
}
@Override
public Row getRow(Session session, long key) {
return mainIndex.getRow(session, key);
}
@Override
public boolean isRowIdIndex() {
return true;
}
@Override
public boolean canGetFirstOrLast() {
return true;
}
@Override
public void close(Session session) {
}
@Override
public Cursor find(Session session, SearchRow first, SearchRow last) {
ValueLong min = mainIndex.getKey(first, ValueLong.MIN, ValueLong.MIN);
ValueLong max = mainIndex.getKey(last, ValueLong.MAX, ValueLong.MIN);
return mainIndex.find(session, min, max);
}
@Override
public Cursor findFirstOrLast(Session session, boolean first) {
return mainIndex.findFirstOrLast(session, first);
}
@Override
public int getColumnIndex(Column col) {
if (col.getColumnId() == mainIndex.getMainIndexColumn()) {
return 0;
}
return -1;
}
@Override
public boolean isFirstColumn(Column column) {
return getColumnIndex(column) == 0;
}
@Override
public double getCost(Session session, int[] masks,
TableFilter[] filters, int filter, SortOrder sortOrder,
AllColumnsForPlan allColumnsSet) {
return 10 * getCostRangeIndex(masks, mainIndex.getRowCountApproximation(),
filters, filter, sortOrder, true, allColumnsSet);
}
@Override
public boolean needRebuild() {
return false;
}
@Override
public void remove(Session session, Row row) {
}
@Override
public void update(Session session, Row oldRow, Row newRow) {
}
@Override
public void remove(Session session) {
mainIndex.setMainIndexColumn(SearchRow.ROWID_INDEX);
}
@Override
public void truncate(Session session) {
}
@Override
public void checkRename() {
}
@Override
public long getRowCount(Session session) {
return mainIndex.getRowCount(session);
}
@Override
public long getRowCountApproximation() {
return mainIndex.getRowCountApproximation();
}
@Override
public long getDiskSpaceUsed() {
return 0;
}
}