Examples with Row org.h2.result.Row used on opensource projects

Example 51 with Row

use of org.h2.result.Row in project h2database by h2database.

the class PageBtreeIndex method writeRow.

/**
 * Write a row to the data page at the given offset.
 *
 * @param data the data
 * @param offset the offset
 * @param onlyPosition whether only the position of the row is stored
 * @param row the row to write
 */
void writeRow(Data data, int offset, SearchRow row, boolean onlyPosition) {
    data.setPos(offset);
    data.writeVarLong(row.getKey());
    if (!onlyPosition) {
        for (Column col : columns) {
            int idx = col.getColumnId();
            data.writeValue(row.getValue(idx));
        }
    }
}

Example 52 with Row

use of org.h2.result.Row in project h2database by h2database.

the class PageBtreeIndex method readRow.

/**
 * Read a row from the data page at the given offset.
 *
 * @param data the data
 * @param offset the offset
 * @param onlyPosition whether only the position of the row is stored
 * @param needData whether the row data is required
 * @return the row
 */
SearchRow readRow(Data data, int offset, boolean onlyPosition, boolean needData) {
    synchronized (data) {
        data.setPos(offset);
        long key = data.readVarLong();
        if (onlyPosition) {
            if (needData) {
                return tableData.getRow(null, key);
            }
            SearchRow row = table.getTemplateSimpleRow(true);
            row.setKey(key);
            return row;
        }
        SearchRow row = table.getTemplateSimpleRow(columns.length == 1);
        row.setKey(key);
        for (Column col : columns) {
            int idx = col.getColumnId();
            row.setValue(idx, data.readValue());
        }
        return row;
    }
}

Example 53 with Row

use of org.h2.result.Row in project h2database by h2database.

the class PageBtreeNode method remove.

@Override
SearchRow remove(SearchRow row) {
    int at = find(row, false, false, true);
    // merge is not implemented to allow concurrent usage
    // TODO maybe implement merge
    PageBtree page = index.getPage(childPageIds[at]);
    SearchRow last = page.remove(row);
    index.getPageStore().logUndo(this, data);
    updateRowCount(-1);
    written = false;
    changeCount = index.getPageStore().getChangeCount();
    if (last == null) {
        // the last row didn't change - nothing to do
        return null;
    } else if (last == row) {
        // this child is now empty
        index.getPageStore().free(page.getPos());
        if (entryCount < 1) {
            // no more children - this page is empty as well
            return row;
        }
        if (at == entryCount) {
            // removing the last child
            last = getRow(at - 1);
        } else {
            last = null;
        }
        removeChild(at);
        index.getPageStore().update(this);
        return last;
    }
    // the last row is in the last child
    if (at == entryCount) {
        return last;
    }
    int child = childPageIds[at];
    removeChild(at);
    // TODO this can mean only the position is now stored
    // should split at the next possible moment
    addChild(at, child, last);
    // remove and add swapped two children, fix that
    int temp = childPageIds[at];
    childPageIds[at] = childPageIds[at + 1];
    childPageIds[at + 1] = temp;
    index.getPageStore().update(this);
    return null;
}

Example 54 with Row

use of org.h2.result.Row in project h2database by h2database.

the class PageDataIndex method add.

@Override
public void add(Session session, Row row) {
    boolean retry = false;
    if (mainIndexColumn != -1) {
        row.setKey(row.getValue(mainIndexColumn).getLong());
    } else {
        if (row.getKey() == 0) {
            row.setKey((int) ++lastKey);
            retry = true;
        }
    }
    if (tableData.getContainsLargeObject()) {
        for (int i = 0, len = row.getColumnCount(); i < len; i++) {
            Value v = row.getValue(i);
            Value v2 = v.copy(database, getId());
            if (v2.isLinkedToTable()) {
                session.removeAtCommitStop(v2);
            }
            if (v != v2) {
                row.setValue(i, v2);
            }
        }
    }
    // tries are required (specially if there was originally a primary key)
    if (trace.isDebugEnabled()) {
        trace.debug("{0} add {1}", getName(), row);
    }
    long add = 0;
    while (true) {
        try {
            addTry(session, row);
            break;
        } catch (DbException e) {
            if (e != fastDuplicateKeyException) {
                throw e;
            }
            if (!retry) {
                throw getNewDuplicateKeyException();
            }
            if (add == 0) {
                // in the first re-try add a small random number,
                // to avoid collisions after a re-start
                row.setKey((long) (row.getKey() + Math.random() * 10_000));
            } else {
                row.setKey(row.getKey() + add);
            }
            add++;
        } finally {
            store.incrementChangeCount();
        }
    }
    lastKey = Math.max(lastKey, row.getKey());
}

Example 55 with Row

use of org.h2.result.Row in project h2database by h2database.

the class UndoLogRecord method append.

/**
 * Append the row to the buffer.
 *
 * @param buff the buffer
 * @param log the undo log
 */
void append(Data buff, UndoLog log) {
    int p = buff.length();
    buff.writeInt(0);
    buff.writeInt(operation);
    buff.writeByte(row.isDeleted() ? (byte) 1 : (byte) 0);
    buff.writeInt(log.getTableId(table));
    buff.writeLong(row.getKey());
    buff.writeInt(row.getSessionId());
    int count = row.getColumnCount();
    buff.writeInt(count);
    for (int i = 0; i < count; i++) {
        Value v = row.getValue(i);
        buff.checkCapacity(buff.getValueLen(v));
        buff.writeValue(v);
    }
    buff.fillAligned();
    buff.setInt(p, (buff.length() - p) / Constants.FILE_BLOCK_SIZE);
}