Package org.h2.value

Examples of org.h2.value.Value

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                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;
            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 = new AggregateData(type, dataType);
        }
        Value v = data.getValue(session.getDatabase(), distinct);
        if (type == GROUP_CONCAT) {
            ArrayList<Value> list = data.getList();
            if (list == null || list.size() == 0) {
                return ValueNull.INSTANCE;
            }
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                }
                while (rs.next()) {
                    writeByte((byte) 1);
                    for (int i = 0; i < columnCount; i++) {
                        int t = DataType.convertSQLTypeToValueType(meta.getColumnType(i + 1));
                        Value val = DataType.readValue(null, rs, i + 1, t);
                        writeValue(val);
                    }
                }
                writeByte((byte) 0);
                rs.beforeFirst();
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                }
                while (rs.next()) {
                    len++;
                    for (int i = 0; i < columnCount; i++) {
                        int t = DataType.convertSQLTypeToValueType(meta.getColumnType(i + 1));
                        Value val = DataType.readValue(null, rs, i + 1, t);
                        len += getValueLen(val, handler);
                    }
                }
                len++;
                rs.beforeFirst();
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                    compareType = getReversedCompareType(compareType);
                }
            }
            if (left instanceof ExpressionColumn) {
                if (right.isConstant()) {
                    Value r = right.getValue(session);
                    if (r == ValueNull.INSTANCE) {
                        if ((compareType & NULL_SAFE) == 0) {
                            return ValueExpression.getNull();
                        }
                    }
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        }
        return this;
    }

    public Value getValue(Session session) {
        Value l = left.getValue(session);
        if (right == null) {
            boolean result;
            switch (compareType) {
            case IS_NULL:
                result = l == ValueNull.INSTANCE;
                break;
            case IS_NOT_NULL:
                result = !(l == ValueNull.INSTANCE);
                break;
            default:
                throw DbException.throwInternalError("type=" + compareType);
            }
            return ValueBoolean.get(result);
        }
        if (l == ValueNull.INSTANCE) {
            if ((compareType & NULL_SAFE) == 0) {
                return ValueNull.INSTANCE;
            }
        }
        Value r = right.getValue(session);
        if (r == ValueNull.INSTANCE) {
            if ((compareType & NULL_SAFE) == 0) {
                return ValueNull.INSTANCE;
            }
        }
        int dataType = Value.getHigherOrder(left.getType(), right.getType());
        l = l.convertTo(dataType);
        r = r.convertTo(dataType);
        boolean result = compareNotNull(database, l, r, compareType);
        return ValueBoolean.get(result);
    }
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     *             closed
     */
    public Object getObject(int columnIndex) throws SQLException {
        try {
            debugCodeCall("getObject", columnIndex);
            Value v = get(columnIndex);
            return conn.convertToDefaultObject(v);
        } catch (Exception e) {
            throw logAndConvert(e);
        }
    }
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     *             closed
     */
    public Object getObject(String columnLabel) throws SQLException {
        try {
            debugCodeCall("getObject", columnLabel);
            Value v = get(columnLabel);
            return conn.convertToDefaultObject(v);
        } catch (Exception e) {
            throw logAndConvert(e);
        }
    }
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     */
    public Blob getBlob(int columnIndex) throws SQLException {
        try {
            int id = getNextId(TraceObject.BLOB);
            debugCodeAssign("Blob", TraceObject.BLOB, id, "getBlob(" + columnIndex + ")");
            Value v = get(columnIndex);
            return v == ValueNull.INSTANCE ? null : new JdbcBlob(conn, v, id);
        } catch (Exception e) {
            throw logAndConvert(e);
        }
    }
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     */
    public Blob getBlob(String columnLabel) throws SQLException {
        try {
            int id = getNextId(TraceObject.BLOB);
            debugCodeAssign("Blob", TraceObject.BLOB, id, "getBlob(" + quote(columnLabel) + ")");
            Value v = get(columnLabel);
            return v == ValueNull.INSTANCE ? null : new JdbcBlob(conn, v, id);
        } catch (Exception e) {
            throw logAndConvert(e);
        }
    }
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     */
    public Clob getClob(int columnIndex) throws SQLException {
        try {
            int id = getNextId(TraceObject.CLOB);
            debugCodeAssign("Clob", TraceObject.CLOB, id, "getClob(" + columnIndex + ")");
            Value v = get(columnIndex);
            return v == ValueNull.INSTANCE ? null : new JdbcClob(conn, v, id);
        } catch (Exception e) {
            throw logAndConvert(e);
        }
    }
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