Examples with Index org.h2.index.Index used on opensource projects

Example 46 with Index

use of org.h2.index.Index in project h2database by h2database.

the class BaseIndex method initBaseIndex.

/**
 * Initialize the base index.
 *
 * @param newTable the table
 * @param id the object id
 * @param name the index name
 * @param newIndexColumns the columns that are indexed or null if this is
 *            not yet known
 * @param newIndexType the index type
 */
protected void initBaseIndex(Table newTable, int id, String name, IndexColumn[] newIndexColumns, IndexType newIndexType) {
    initSchemaObjectBase(newTable.getSchema(), id, name, Trace.INDEX);
    this.indexType = newIndexType;
    this.table = newTable;
    if (newIndexColumns != null) {
        this.indexColumns = newIndexColumns;
        columns = new Column[newIndexColumns.length];
        int len = columns.length;
        columnIds = new int[len];
        for (int i = 0; i < len; i++) {
            Column col = newIndexColumns[i].column;
            columns[i] = col;
            columnIds[i] = col.getColumnId();
        }
    }
}

Example 47 with Index

use of org.h2.index.Index in project h2database by h2database.

the class BaseIndex method compareRows.

@Override
public int compareRows(SearchRow rowData, SearchRow compare) {
    if (rowData == compare) {
        return 0;
    }
    for (int i = 0, len = indexColumns.length; i < len; i++) {
        int index = columnIds[i];
        Value v1 = rowData.getValue(index);
        Value v2 = compare.getValue(index);
        if (v1 == null || v2 == null) {
            // can't compare further
            return 0;
        }
        int c = compareValues(v1, v2, indexColumns[i].sortType);
        if (c != 0) {
            return c;
        }
    }
    return 0;
}

Example 48 with Index

use of org.h2.index.Index in project h2database by h2database.

the class HashIndex method add.

@Override
public void add(Session session, Row row) {
    Value key = row.getValue(indexColumn);
    Object old = rows.get(key);
    if (old != null) {
        // TODO index duplicate key for hash indexes: is this allowed?
        throw getDuplicateKeyException(key.toString());
    }
    rows.put(key, row.getKey());
}

Example 49 with Index

use of org.h2.index.Index in project h2database by h2database.

the class HashIndex method getCost.

@Override
public double getCost(Session session, int[] masks, TableFilter[] filters, int filter, SortOrder sortOrder, HashSet<Column> allColumnsSet) {
    for (Column column : columns) {
        int index = column.getColumnId();
        int mask = masks[index];
        if ((mask & IndexCondition.EQUALITY) != IndexCondition.EQUALITY) {
            return Long.MAX_VALUE;
        }
    }
    return 2;
}

Example 50 with Index

use of org.h2.index.Index in project h2database by h2database.

the class HashIndex method find.

@Override
public Cursor find(Session session, SearchRow first, SearchRow last) {
    if (first == null || last == null) {
        // TODO hash index: should additionally check if values are the same
        throw DbException.throwInternalError(first + " " + last);
    }
    Value v = first.getValue(indexColumn);
    /*
         * Sometimes the incoming search is a similar, but not the same type
         * e.g. the search value is INT, but the index column is LONG. In which
         * case we need to convert, otherwise the ValueHashMap will not find the
         * result.
         */
    v = v.convertTo(tableData.getColumn(indexColumn).getType());
    Row result;
    Long pos = rows.get(v);
    if (pos == null) {
        result = null;
    } else {
        result = tableData.getRow(session, pos.intValue());
    }
    return new SingleRowCursor(result);
}