Package org.h2.table

Examples of org.h2.table.Column

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    static Expression[] getExpressionColumns(Session session, ValueArray value) {
        Value[] list = value.getList();
        ExpressionColumn[] expr = new ExpressionColumn[list.length];
        for (int i = 0, len = list.length; i < len; i++) {
            Value v = list[i];
            Column col = new Column("C" + (i + 1), v.getType(), v.getPrecision(), v.getScale(),
                    v.getDisplaySize());
            expr[i] = new ExpressionColumn(session.getDatabase(), col);
        }
        return expr;
    }
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                String name = meta.getColumnLabel(i + 1);
                int type = DataType.convertSQLTypeToValueType(meta.getColumnType(i + 1));
                int precision = meta.getPrecision(i + 1);
                int scale = meta.getScale(i + 1);
                int displaySize = meta.getColumnDisplaySize(i + 1);
                Column col = new Column(name, type, precision, scale, displaySize);
                Expression expr = new ExpressionColumn(db, col);
                expressions[i] = expr;
            }
            return expressions;
        } catch (SQLException e) {
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    private ValueResultSet getTable(Session session, Expression[] argList, boolean onlyColumnList, boolean distinctRows) {
        int len = columnList.length;
        Expression[] header = new Expression[len];
        Database db = session.getDatabase();
        for (int i = 0; i < len; i++) {
            Column c = columnList[i];
            ExpressionColumn col = new ExpressionColumn(db, c);
            header[i] = col;
        }
        LocalResult result = new LocalResult(session, header, len);
        if (distinctRows) {
            result.setDistinct();
        }
        if (!onlyColumnList) {
            Value[][] list = new Value[len][];
            int rows = 0;
            for (int i = 0; i < len; i++) {
                Value v = argList[i].getValue(session);
                if (v == ValueNull.INSTANCE) {
                    list[i] = new Value[0];
                } else {
                    ValueArray array = (ValueArray) v.convertTo(Value.ARRAY);
                    Value[] l = array.getList();
                    list[i] = l;
                    rows = Math.max(rows, l.length);
                }
            }
            for (int row = 0; row < rows; row++) {
                Value[] r = new Value[len];
                for (int j = 0; j < len; j++) {
                    Value[] l = list[j];
                    Value v;
                    if (l.length <= row) {
                        v = ValueNull.INSTANCE;
                    } else {
                        Column c = columnList[j];
                        v = l[row];
                        v = c.convert(v);
                        v = v.convertPrecision(c.getPrecision(), false);
                        v = v.convertScale(true, c.getScale());
                    }
                    r[j] = v;
                }
                result.addRow(r);
            }
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    }

    private Index getColumnIndex(boolean first) {
        if (on instanceof ExpressionColumn) {
            ExpressionColumn col = (ExpressionColumn) on;
            Column column = col.getColumn();
            TableFilter filter = col.getTableFilter();
            if (filter != null) {
                Table table = filter.getTable();
                Index index = table.getIndexForColumn(column, first);
                return index;
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                mapColumn(resolver, col, level);
                return;
            }
        }
        if (database.equalsIdentifiers(Column.ROWID, columnName)) {
            Column col = resolver.getRowIdColumn();
            if (col != null) {
                mapColumn(resolver, col, level);
                return;
            }
        }
        Column[] columns = resolver.getSystemColumns();
        for (int i = 0; columns != null && i < columns.length; i++) {
            Column col = columns[i];
            if (database.equalsIdentifiers(columnName, col.getName())) {
                mapColumn(resolver, col, level);
                return;
            }
        }
    }
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        for (int i = 0; first != null && i < first.getColumnCount(); i++) {
            Value v = first.getValue(i);
            if (v != null) {
                buff.appendOnlyFirst(" WHERE ");
                buff.appendExceptFirst(" AND ");
                Column col = table.getColumn(i);
                buff.append(col.getSQL());
                if (v == ValueNull.INSTANCE) {
                    buff.append(" IS NULL");
                } else {
                    buff.append(">=");
                    addParameter(buff, col);
                    params.add(v);
                }
            }
        }
        for (int i = 0; last != null && i < last.getColumnCount(); i++) {
            Value v = last.getValue(i);
            if (v != null) {
                buff.appendOnlyFirst(" WHERE ");
                buff.appendExceptFirst(" AND ");
                Column col = table.getColumn(i);
                buff.append(col.getSQL());
                if (v == ValueNull.INSTANCE) {
                    buff.append(" IS NULL");
                } else {
                    buff.append("<=");
                    addParameter(buff, col);
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        ArrayList<Value> params = New.arrayList();
        StatementBuilder buff = new StatementBuilder("DELETE FROM ");
        buff.append(targetTableName).append(" WHERE ");
        for (int i = 0; i < row.getColumnCount(); i++) {
            buff.appendExceptFirst("AND ");
            Column col = table.getColumn(i);
            buff.append(col.getSQL());
            Value v = row.getValue(i);
            if (isNull(v)) {
                buff.append(" IS NULL ");
            } else {
                buff.append('=');
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            }
        }
        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('=');
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            this.indexColumns = newIndexColumns;
            columns = new Column[newIndexColumns.length];
            int len = columns.length;
            columnIds = new int[len];
            for (int i = 0; i < len; i++) {
                Column col = newIndexColumns[i].column;
                columns[i] = col;
                columnIds[i] = col.getColumnId();
            }
        }
    }
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        int totalSelectivity = 0;
        if (masks == null) {
            return cost;
        }
        for (int i = 0, len = columns.length; i < len; i++) {
            Column column = columns[i];
            int index = column.getColumnId();
            int mask = masks[index];
            if ((mask & IndexCondition.EQUALITY) == IndexCondition.EQUALITY) {
                if (i == columns.length - 1 && getIndexType().isUnique()) {
                    cost = 3;
                    break;
                }
                totalSelectivity = 100 - ((100 - totalSelectivity) * (100 - column.getSelectivity()) / 100);
                long distinctRows = rowCount * totalSelectivity / 100;
                if (distinctRows <= 0) {
                    distinctRows = 1;
                }
                rows = Math.max(rowCount / distinctRows, 1);
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