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

Example 56 with Row

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

the class Aggregate method getValue.

@Override
public Value getValue(Session session) {
    if (select.isQuickAggregateQuery()) {
        switch(type) {
            case COUNT:
            case COUNT_ALL:
                Table table = select.getTopTableFilter().getTable();
                return ValueLong.get(table.getRowCount(session));
            case MIN:
            case MAX:
                {
                    boolean first = type == AggregateType.MIN;
                    Index index = getMinMaxColumnIndex();
                    int sortType = index.getIndexColumns()[0].sortType;
                    if ((sortType & SortOrder.DESCENDING) != 0) {
                        first = !first;
                    }
                    Cursor cursor = index.findFirstOrLast(session, first);
                    SearchRow row = cursor.getSearchRow();
                    Value v;
                    if (row == null) {
                        v = ValueNull.INSTANCE;
                    } else {
                        v = row.getValue(index.getColumns()[0].getColumnId());
                    }
                    return v;
                }
            case MEDIAN:
                {
                    return AggregateDataMedian.getResultFromIndex(session, on, dataType);
                }
            default:
                DbException.throwInternalError("type=" + type);
        }
    }
    HashMap<Expression, Object> group = select.getCurrentGroup();
    if (group == null) {
        throw DbException.get(ErrorCode.INVALID_USE_OF_AGGREGATE_FUNCTION_1, getSQL());
    }
    AggregateData data = (AggregateData) group.get(this);
    if (data == null) {
        data = AggregateData.create(type);
    }
    if (type == AggregateType.GROUP_CONCAT) {
        Value[] array = ((AggregateDataCollecting) data).getArray();
        if (array == null) {
            return ValueNull.INSTANCE;
        }
        if (orderByList != null || distinct) {
            sortWithOrderBy(array);
        }
        StatementBuilder buff = new StatementBuilder();
        String sep = groupConcatSeparator == null ? "," : groupConcatSeparator.getValue(session).getString();
        for (Value val : array) {
            String s;
            if (val.getType() == Value.ARRAY) {
                s = ((ValueArray) val).getList()[0].getString();
            } else {
                s = val.getString();
            }
            if (s == null) {
                continue;
            }
            if (sep != null) {
                buff.appendExceptFirst(sep);
            }
            buff.append(s);
        }
        return ValueString.get(buff.toString());
    } else if (type == AggregateType.ARRAY_AGG) {
        Value[] array = ((AggregateDataCollecting) data).getArray();
        if (array == null) {
            return ValueNull.INSTANCE;
        }
        if (orderByList != null || distinct) {
            sortWithOrderBy(array);
        }
        if (orderByList != null) {
            for (int i = 0; i < array.length; i++) {
                array[i] = ((ValueArray) array[i]).getList()[0];
            }
        }
        return ValueArray.get(array);
    }
    return data.getValue(session.getDatabase(), dataType, distinct);
}

Example 57 with Row

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

the class LinkedIndex method add.

@Override
public void add(Session session, Row row) {
    ArrayList<Value> params = New.arrayList();
    StatementBuilder buff = new StatementBuilder("INSERT INTO ");
    buff.append(targetTableName).append(" VALUES(");
    for (int i = 0; i < row.getColumnCount(); i++) {
        Value v = row.getValue(i);
        buff.appendExceptFirst(", ");
        if (v == null) {
            buff.append("DEFAULT");
        } else if (isNull(v)) {
            buff.append("NULL");
        } else {
            buff.append('?');
            params.add(v);
        }
    }
    buff.append(')');
    String sql = buff.toString();
    try {
        link.execute(sql, params, true);
        rowCount++;
    } catch (Exception e) {
        throw TableLink.wrapException(sql, e);
    }
}

Example 58 with Row

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

the class LinkedIndex method update.

/**
 * Update a row using a UPDATE statement. This method is to be called if the
 * emit updates option is enabled.
 *
 * @param oldRow the old data
 * @param newRow the new data
 */
public void update(Row oldRow, Row newRow) {
    ArrayList<Value> params = New.arrayList();
    StatementBuilder buff = new StatementBuilder("UPDATE ");
    buff.append(targetTableName).append(" SET ");
    for (int i = 0; i < newRow.getColumnCount(); i++) {
        buff.appendExceptFirst(", ");
        buff.append(table.getColumn(i).getSQL()).append('=');
        Value v = newRow.getValue(i);
        if (v == null) {
            buff.append("DEFAULT");
        } else {
            buff.append('?');
            params.add(v);
        }
    }
    buff.append(" WHERE ");
    buff.resetCount();
    for (int i = 0; i < oldRow.getColumnCount(); i++) {
        Column col = table.getColumn(i);
        buff.appendExceptFirst(" AND ");
        buff.append(col.getSQL());
        Value v = oldRow.getValue(i);
        if (isNull(v)) {
            buff.append(" IS NULL");
        } else {
            buff.append('=');
            params.add(v);
            addParameter(buff, col);
        }
    }
    String sql = buff.toString();
    try {
        link.execute(sql, params, true);
    } catch (Exception e) {
        throw TableLink.wrapException(sql, e);
    }
}

Example 59 with Row

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

the class NonUniqueHashIndex method add.

@Override
public void add(Session session, Row row) {
    Value key = row.getValue(indexColumn);
    ArrayList<Long> positions = rows.get(key);
    if (positions == null) {
        positions = New.arrayList();
        rows.put(key, positions);
    }
    positions.add(row.getKey());
    rowCount++;
}

Example 60 with Row

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

the class PageLog method logAddOrRemoveRow.

/**
 * A record is added to a table, or removed from a table.
 *
 * @param session the session
 * @param tableId the table id
 * @param row the row to add
 * @param add true if the row is added, false if it is removed
 */
void logAddOrRemoveRow(Session session, int tableId, Row row, boolean add) {
    if (trace.isDebugEnabled()) {
        trace.debug("log " + (add ? "+" : "-") + " s: " + session.getId() + " table: " + tableId + " row: " + row);
    }
    session.addLogPos(logSectionId, logPos);
    logPos++;
    Data data = dataBuffer;
    data.reset();
    int columns = row.getColumnCount();
    data.writeVarInt(columns);
    data.checkCapacity(row.getByteCount(data));
    if (session.isRedoLogBinaryEnabled()) {
        for (int i = 0; i < columns; i++) {
            data.writeValue(row.getValue(i));
        }
    } else {
        for (int i = 0; i < columns; i++) {
            Value v = row.getValue(i);
            if (v.getType() == Value.BYTES) {
                data.writeValue(ValueNull.INSTANCE);
            } else {
                data.writeValue(v);
            }
        }
    }
    Data buffer = getBuffer();
    buffer.writeByte((byte) (add ? ADD : REMOVE));
    buffer.writeVarInt(session.getId());
    buffer.writeVarInt(tableId);
    buffer.writeVarLong(row.getKey());
    if (add) {
        buffer.writeVarInt(data.length());
        buffer.checkCapacity(data.length());
        buffer.write(data.getBytes(), 0, data.length());
    }
    write(buffer);
}