Package org.lealone.expression

Examples of org.lealone.expression.Expression

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        do {
            int i = 0;
            ArrayList<Expression> row = New.arrayList();
            boolean multiColumn = readIf("(");
            do {
                Expression expr = readExpression();
                expr = expr.optimize(session);
                int type = expr.getType();
                long prec;
                int scale, displaySize;
                Column column;
                String columnName = "C" + (i + 1);
                if (rows.size() == 0) {
                    if (type == Value.UNKNOWN) {
                        type = Value.STRING;
                    }
                    DataType dt = DataType.getDataType(type);
                    prec = dt.defaultPrecision;
                    scale = dt.defaultScale;
                    displaySize = dt.defaultDisplaySize;
                    column = new Column(columnName, type, prec, scale, displaySize);
                    columns.add(column);
                }
                prec = expr.getPrecision();
                scale = expr.getScale();
                displaySize = expr.getDisplaySize();
                if (i >= columns.size()) {
                    throw DbException.get(ErrorCode.COLUMN_COUNT_DOES_NOT_MATCH);
                }
                Column c = columns.get(i);
                type = Value.getHigherOrder(c.getType(), type);
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        Schema schema = getSchema();
        if (isKeyword(constantName)) {
            throw DbException.get(ErrorCode.CONSTANT_ALREADY_EXISTS_1, constantName);
        }
        read("VALUE");
        Expression expr = readExpression();
        CreateConstant command = new CreateConstant(session, schema);
        command.setConstantName(constantName);
        command.setExpression(expr);
        command.setIfNotExists(ifNotExists);
        return command;
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        CreateUserDataType command = new CreateUserDataType(session);
        command.setTypeName(readUniqueIdentifier());
        read("AS");
        Column col = parseColumnForTable("VALUE", true);
        if (readIf("CHECK")) {
            Expression expr = readExpression();
            col.addCheckConstraint(session, expr);
        }
        col.rename(null);
        command.setColumn(col);
        command.setIfNotExists(ifNotExists);
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                } else if (readIf("NOT")) {
                    read("NULL");
                    command.setType(CommandInterface.ALTER_TABLE_ALTER_COLUMN_NOT_NULL);
                    return command;
                } else if (readIf("DEFAULT")) {
                    Expression defaultExpression = readExpression();
                    command.setType(CommandInterface.ALTER_TABLE_ALTER_COLUMN_DEFAULT);
                    command.setDefaultExpression(defaultExpression);
                    return command;
                }
            } else if (readIf("RESTART")) {
                readIf("WITH");
                Expression start = readExpression();
                AlterSequence command = new AlterSequence(session, table.getSchema());
                command.setColumn(column);
                command.setStartWith(start);
                return command;
            } else if (readIf("SELECTIVITY")) {
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            column.setNullable(false);
        } else {
            readIf("NULL");
        }
        if (readIf("CHECK")) {
            Expression expr = readExpression();
            column.addCheckConstraint(session, expr);
        }
        if (readIf("REFERENCES")) {
            AlterTableAddConstraint ref = new AlterTableAddConstraint(session, schema, false);
            ref.setConstraintName(constraintName);
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            return null;

        Put put = row.getPut();
        Column c;
        Value v;
        Expression e;
        for (int i = 0, len = columns.length; i < len; i++) {
            c = columns[i];
            e = expr[i];
            if (e != null) {
                // e can be null (DEFAULT)
                e = e.optimize(session);
                v = e.getValue(session);
                if (c.isTypeUnknown()) {
                    c.setType(v.getType());
                    //alterTable.appendExceptFirst(", ");
                    //alterTable.append(c.getCreateSQL());
                    if (alterColumns != null)
                        alterColumns.add(c);
                }
                v = c.convert(e.getValue(session));
                row.setValue(c.getColumnId(), v);

                if (!c.isRowKeyColumn())
                    put.add(c.getColumnFamilyNameAsBytes(), c.getNameAsBytes(), HBaseUtils.toBytes(v));
            } else {
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                Parameter param = params.get(i);
                Value value;
                if (action == SET_NULL) {
                    value = ValueNull.INSTANCE;
                } else {
                    Expression expr = column.getDefaultExpression();
                    if (expr == null) {
                        throw DbException.get(ErrorCode.NO_DEFAULT_SET_1, column.getName());
                    }
                    value = expr.getValue(session);
                }
                param.setValue(value);
            }
        }
        return command;
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        for (TableFilter tableFilter : allFilters) {
            PlanItem item = tableFilter.getBestPlanItem(session, level++);
            planItems.put(tableFilter, item);
            cost += cost * item.cost;
            setEvaluatable(tableFilter, true);
            Expression on = tableFilter.getJoinCondition();
            if (on != null) {
                if (!on.isEverything(ExpressionVisitor.EVALUATABLE_VISITOR)) {
                    invalidPlan = true;
                    break;
                }
            }
        }
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     * @param session the session
     * @param column the column
     * @return the value
     */
    public Value getDefaultValue(Session session, Column column) {
        Expression defaultExpr = column.getDefaultExpression();
        Value v;
        if (defaultExpr == null) {
            v = column.validateConvertUpdateSequence(session, null);
        } else {
            v = defaultExpr.getValue(session);
        }
        return column.convert(v);
    }
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                rowNumber++;
                Value[] keyValues = new Value[groupIndex.length];
                // update group
                for (int i = 0; i < groupIndex.length; i++) {
                    int idx = groupIndex[i];
                    Expression expr = expressions.get(idx);
                    keyValues[i] = expr.getValue(session);
                }

                if (previousKeyValues == null) {
                    previousKeyValues = keyValues;
                    currentGroup = New.hashMap();
                } else if (!Arrays.equals(previousKeyValues, keyValues)) {
                    addGroupSortedRow(previousKeyValues, columnCount, result);
                    previousKeyValues = keyValues;
                    currentGroup = New.hashMap();
                }
                currentGroupRowId++;

                for (int i = 0; i < columnCount; i++) {
                    if (groupByExpression == null || !groupByExpression[i]) {
                        Expression expr = expressions.get(i);
                        expr.updateAggregate(session);
                    }
                }
            }
        }
        if (previousKeyValues != null) {
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Related Classes of org.lealone.expression.Expression

  • org.lealone.cassandra.command.CassandraParser
  • org.lealone.command.ddl.AlterTableAlterColumn
  • org.lealone.command.ddl.CreateTable
  • org.lealone.command.dml.ExecuteProcedure
  • org.lealone.command.dml.Insert
  • org.lealone.command.dml.Merge
  • org.lealone.command.dml.Query
  • org.lealone.command.dml.Select
  • org.lealone.command.dml.SelectListColumnResolver
  • org.lealone.command.dml.SelectUnion
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