Examples of org.lealone.value.Value

org.lealone.value.Value
This is the base class for all value classes. It provides conversion and comparison methods.

                    return added.optimize(session);
                }
            }
        }
        // TODO optimization: convert .. OR .. to UNION if the cost is lower
        Value l = left.isConstant() ? left.getValue(session) : null;
        Value r = right.isConstant() ? right.getValue(session) : null;
        if (l == null && r == null) {
            return this;
        }
        if (l != null && r != null) {
            return ValueExpression.get(getValue(session));
        }
        switch (andOrType) {
        case AND:
            if (l != null) {
                if (Boolean.FALSE.equals(l.getBoolean())) {
                    return ValueExpression.get(l);
                } else if (Boolean.TRUE.equals(l.getBoolean())) {
                    return right;
                }
            } else if (r != null) {
                if (Boolean.FALSE.equals(r.getBoolean())) {
                    return ValueExpression.get(r);
                } else if (Boolean.TRUE.equals(r.getBoolean())) {
                    return left;
                }
            }
            break;
        case OR:
            if (l != null) {
                if (Boolean.TRUE.equals(l.getBoolean())) {
                    return ValueExpression.get(l);
                } else if (Boolean.FALSE.equals(l.getBoolean())) {
                    return right;
                }
            } else if (r != null) {
                if (Boolean.TRUE.equals(r.getBoolean())) {
                    return ValueExpression.get(r);
                } else if (Boolean.FALSE.equals(r.getBoolean())) {
                    return left;
                }
            }
            break;
        default:

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            return ValueLong.get(currentSearchRow.getKey());
        } else if (columnId == -2) {
            return currentSearchRow.getRowKey();
        }
        if (current == null) {
            Value v = currentSearchRow.getValue(columnId);
            if (v != null) {
                return v;
            }
            current = cursor.get();
            if (current == null) {

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        if (columnId == -1) {
            return ValueLong.get(currentSearchRow.getKey());
        }
        if (current == null) {
            Value v = currentSearchRow.getValue(columnId);
            if (v != null) {
                return v;
            }
            current = cursor.get();
            if (current == null) {

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     * @param value the new value (may not be null)
     */
    public void setVariable(String name, Value value) {
        initVariables();
        modificationId++;
        Value old;
        if (value == ValueNull.INSTANCE) {
            old = variables.remove(name);
        } else {
            // link LOB values, to make sure we have our own object
            value = value.link(database, LobStorage.TABLE_ID_SESSION_VARIABLE);
            old = variables.put(name, value);
        }
        if (old != null) {
            // close the old value (in case it is a lob)
            old.unlink();
            old.close();
        }
    }

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    public int getParameterCount() {
        return javaMethod.getParameterCount();
    }


    public ValueResultSet getValueForColumnList(Session session, Expression[] argList) {
        Value v = javaMethod.getValue(session, argList, true);
        return v == ValueNull.INSTANCE ? null : (ValueResultSet) v;
    }

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     * @param name the variable name
     * @return the value, or NULL
     */
    public Value getVariable(String name) {
        initVariables();
        Value v = variables.get(name);
        return v == null ? ValueNull.INSTANCE : v;
    }

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        try {
            int rowcount = result.getRowCount();
            if (rowcount > 1) {
                throw DbException.get(ErrorCode.SCALAR_SUBQUERY_CONTAINS_MORE_THAN_ONE_ROW);
            }
            Value v;
            if (rowcount <= 0) {
                v = ValueNull.INSTANCE;
            } else {
                result.next();
                Value[] values = result.currentRow();

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            valueSet.add(expression.getValue(session).convertTo(type));
        }
    }


    public Value getValue(Session session) {
        Value x = left.getValue(session);
        if (x == ValueNull.INSTANCE) {
            return x;
        }
        boolean result = valueSet.contains(x);
        if (!result) {

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            throw DbException.convert(e);
        }
        current = tableLink.getTemplateRow();
        for (int i = 0; i < current.getColumnCount(); i++) {
            Column col = tableLink.getColumn(i);
            Value v = DataType.readValue(session, rs, i + 1, col.getType());
            current.setValue(i, v);
        }
        return true;
    }

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                        this.inColumn = column;
                        inResult = condition.getCurrentResult();
                    }
                }
            } else {
                Value v = condition.getCurrentValue(s);
                boolean isStart = condition.isStart();
                boolean isEnd = condition.isEnd();
                int id = column.getColumnId();
                if (id >= 0) {
                    IndexColumn idxCol = indexColumns[id];

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org.lealone.command.CommandContainer

org.lealone.command.CommandRemote

org.lealone.command.ddl.CreateConstant

org.lealone.command.dml.Call

org.lealone.command.dml.Delete

org.lealone.command.dml.Insert

org.lealone.command.dml.Merge

org.lealone.command.dml.Query

org.lealone.command.dml.ScriptCommand

org.lealone.command.dml.Select

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