Examples of org.h2.result.LocalResult

org.h2.result.LocalResult
A local result set contains all row data of a result set. This is the object generated by engine, and it is also used directly by the ResultSet class in the embedded mode. If the result does not fit in memory, it is written to a temporary file.

        if (isResultSet) {
            v = v.convertTo(Value.RESULT_SET);
            ResultSet rs = v.getResultSet();
            return LocalResult.read(session, rs, maxrows);
        }
        LocalResult result = new LocalResult(session, expressions, 1);
        Value[] row = { v };
        result.addRow(row);
        result.done();
        return result;
    }

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        return values;
    }


    public ResultInterface queryMeta() {
        int columnCount = left.getColumnCount();
        LocalResult result = new LocalResult(session, expressionArray, columnCount);
        result.done();
        return result;
    }

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        return result;
    }


    public LocalResult getEmptyResult() {
        int columnCount = left.getColumnCount();
        return new LocalResult(session, expressionArray, columnCount);
    }

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                    return null;
                }
            }
        }
        int columnCount = left.getColumnCount();
        LocalResult result = new LocalResult(session, expressionArray, columnCount);
        if (sort != null) {
            result.setSortOrder(sort);
        }
        if (distinct) {
            left.setDistinct(true);
            right.setDistinct(true);
            result.setDistinct();
        }
        if (randomAccessResult) {
            result.setRandomAccess();
        }
        switch (unionType) {
        case UNION:
        case EXCEPT:
            left.setDistinct(true);
            right.setDistinct(true);
            result.setDistinct();
            break;
        case UNION_ALL:
            break;
        case INTERSECT:
            left.setDistinct(true);
            right.setDistinct(true);
            break;
        default:
            DbException.throwInternalError("type=" + unionType);
        }
        ResultInterface l = left.query(0);
        ResultInterface r = right.query(0);
        l.reset();
        r.reset();
        switch (unionType) {
        case UNION_ALL:
        case UNION: {
            while (l.next()) {
                result.addRow(convert(l.currentRow(), columnCount));
            }
            while (r.next()) {
                result.addRow(convert(r.currentRow(), columnCount));
            }
            break;
        }
        case EXCEPT: {
            while (l.next()) {
                result.addRow(convert(l.currentRow(), columnCount));
            }
            while (r.next()) {
                result.removeDistinct(convert(r.currentRow(), columnCount));
            }
            break;
        }
        case INTERSECT: {
            LocalResult temp = new LocalResult(session, expressionArray, columnCount);
            temp.setDistinct();
            temp.setRandomAccess();
            while (l.next()) {
                temp.addRow(convert(l.currentRow(), columnCount));
            }
            while (r.next()) {
                Value[] values = convert(r.currentRow(), columnCount);
                if (temp.containsDistinct(values)) {
                    result.addRow(values);
                }
            }
            break;
        }

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        this.compareType = compareType;
    }


    public Value getValue(Session session) {
        query.setSession(session);
        LocalResult rows = query.query(0);
        session.addTemporaryResult(rows);
        Value l = left.getValue(session);
        if (rows.getRowCount() == 0) {
            return ValueBoolean.get(all);
        } else if (l == ValueNull.INSTANCE) {
            return l;
        }
        if (!session.getDatabase().getSettings().optimizeInSelect) {
            return getValueSlow(rows, l);
        }
        if (all || (compareType != Comparison.EQUAL && compareType != Comparison.EQUAL_NULL_SAFE)) {
            return getValueSlow(rows, l);
        }
        int dataType = rows.getColumnType(0);
        if (dataType == Value.NULL) {
            return ValueBoolean.get(false);
        }
        l = l.convertTo(dataType);
        if (rows.containsDistinct(new Value[] { l })) {
            return ValueBoolean.get(true);
        }
        if (rows.containsDistinct(new Value[] { ValueNull.INSTANCE })) {
            return ValueNull.INSTANCE;
        }
        return ValueBoolean.get(false);
    }

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        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);
            }
        }
        result.done();
        ValueResultSet vr = ValueResultSet.get(getSimpleResultSet(result, Integer.MAX_VALUE));
        return vr;
    }

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                throw DbException.get(ErrorCode.SYNTAX_ERROR_2, "recursive queries without UNION ALL");
            }
            Query left = union.getLeft();
            // to ensure the last result is not closed
            left.disableCache();
            LocalResult r = left.query(0);
            LocalResult result = union.getEmptyResult();
            while (r.next()) {
                result.addRow(r.currentRow());
            }
            Query right = union.getRight();
            r.reset();
            view.setRecursiveResult(r);
            // to ensure the last result is not closed
            right.disableCache();
            while (true) {
                r = right.query(0);
                if (r.getRowCount() == 0) {
                    break;
                }
                while (r.next()) {
                    result.addRow(r.currentRow());
                }
                r.reset();
                view.setRecursiveResult(r);
            }
            view.setRecursiveResult(null);
            result.done();
            return new ViewCursor(this, result, first, last);
        }
        ArrayList<Parameter> paramList = query.getParameters();
        if (originalParameters != null) {
            for (int i = 0, size = originalParameters.size(); i < size; i++) {

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        }
        if (cachedResult != null && cachedValue == v) {
            cachedResult.reset();
            return cachedResult;
        }
        LocalResult result = LocalResult.read(session,  v.getResultSet(), 0);
        if (function.isDeterministic()) {
            cachedResult = result;
            cachedValue = v;
        }
        return result;

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        }
        result.addRow(row);
    }


    public ResultInterface queryMeta() {
        LocalResult result = new LocalResult(session, expressionArray, visibleColumnCount);
        result.done();
        return result;
    }

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            } else if (l >= 0) {
                limitRows = Math.min(l, limitRows);
            }
        }
        int columnCount = expressions.size();
        LocalResult result = null;
        if (target == null || !session.getDatabase().getSettings().optimizeInsertFromSelect) {
            result = createLocalResult(result);
        }
        if (sort != null && (!sortUsingIndex || distinct)) {
            result = createLocalResult(result);
            result.setSortOrder(sort);
        }
        if (distinct && !isDistinctQuery) {
            result = createLocalResult(result);
            result.setDistinct();
        }
        if (randomAccessResult) {
            result = createLocalResult(result);
            result.setRandomAccess();
        }
        if (isGroupQuery && !isGroupSortedQuery) {
            result = createLocalResult(result);
        }
        if (limitRows >= 0 || offsetExpr != null) {
            result = createLocalResult(result);
        }
        topTableFilter.startQuery(session);
        topTableFilter.reset();
        boolean exclusive = isForUpdate && !isForUpdateMvcc;
        topTableFilter.lock(session, exclusive, exclusive);
        if (isForUpdateMvcc) {
            if (isGroupQuery) {
                throw DbException.getUnsupportedException("FOR UPDATE && GROUP");
            } else if (distinct) {
                throw DbException.getUnsupportedException("FOR UPDATE && DISTINCT");
            } else if (isQuickAggregateQuery) {
                throw DbException.getUnsupportedException("FOR UPDATE && AGGREGATE");
            } else if (topTableFilter.getJoin() != null) {
                throw DbException.getUnsupportedException("FOR UPDATE && JOIN");
            } else if (topTableFilter.getJoin() != null) {
                throw DbException.getUnsupportedException("FOR UPDATE && JOIN");
            }
        }
        ResultTarget to = result != null ? result : target;
        if (limitRows != 0) {
            if (isQuickAggregateQuery) {
                queryQuick(columnCount, to);
            } else if (isGroupQuery) {
                if (isGroupSortedQuery) {
                    queryGroupSorted(columnCount, to);
                } else {
                    queryGroup(columnCount, result);
                }
            } else if (isDistinctQuery) {
                queryDistinct(to, limitRows);
            } else {
                queryFlat(columnCount, to, limitRows);
            }
        }
        if (offsetExpr != null) {
            result.setOffset(offsetExpr.getValue(session).getInt());
        }
        if (limitRows >= 0) {
            result.setLimit(limitRows);
        }
        if (result != null) {
            result.done();
            if (target != null) {
                while (result.next()) {
                    target.addRow(result.currentRow());
                }
                result.close();
                return null;
            }
            return result;
        }
        return null;

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