Examples of org.h2.result.SearchRow

org.h2.result.SearchRow
The interface for rows stored in a table, and for partial rows stored in the index.

                break;
            }
            if (trace.isDebugEnabled()) {
                trace.debug("split {0}", splitPoint);
            }
            SearchRow pivot = root.getRow(splitPoint - 1);
            store.logUndo(root, root.data);
            PageBtree page1 = root;
            PageBtree page2 = root.split(splitPoint);
            store.logUndo(page2, null);
            int id = store.allocatePage();

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     *
     * @param row the row
     * @return the search row
     */
    private SearchRow getSearchRow(Row row) {
        SearchRow r = table.getTemplateSimpleRow(columns.length == 1);
        r.setKeyAndVersion(row);
        for (Column c : columns) {
            int idx = c.getColumnId();
            r.setValue(idx, row.getValue(idx));
        }
        return r;
    }

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    public Cursor findFirstOrLast(Session session, boolean first) {
        if (first) {
            // TODO optimization: this loops through NULL elements
            Cursor cursor = find(session, null, false, null);
            while (cursor.next()) {
                SearchRow row = cursor.getSearchRow();
                Value v = row.getValue(columnIds[0]);
                if (v != ValueNull.INSTANCE) {
                    return cursor;
                }
            }
            return cursor;
        }
        PageBtree root = getPage(rootPageId);
        PageBtreeCursor cursor = new PageBtreeCursor(session, this, null);
        root.last(cursor);
        cursor.previous();
        // TODO optimization: this loops through NULL elements
        do {
            SearchRow row = cursor.getSearchRow();
            if (row == null) {
                break;
            }
            Value v = row.getValue(columnIds[0]);
            if (v != ValueNull.INSTANCE) {
                return cursor;
            }
        } while (cursor.previous());
        return cursor;

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            long key = data.readVarLong();
            if (onlyPosition) {
                if (needData) {
                    return tableData.getRow(null, key);
                }
                SearchRow row = table.getTemplateSimpleRow(true);
                row.setKey(key);
                return row;
            }
            SearchRow row = table.getTemplateSimpleRow(columns.length == 1);
            row.setKey(key);
            for (Column col : columns) {
                int idx = col.getColumnId();
                row.setValue(idx, data.readValue());
            }
            return row;
        }
    }

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            PageBtree page = index.getPage(childPageIds[x]);
            int splitPoint = page.addRowTry(row);
            if (splitPoint == -1) {
                break;
            }
            SearchRow pivot = page.getRow(splitPoint - 1);
            index.getPageStore().logUndo(this, data);
            int splitPoint2 = addChildTry(pivot);
            if (splitPoint2 != -1) {
                return splitPoint2;
            }

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    SearchRow remove(SearchRow row) {
        int at = find(row, false, false, true);
        // merge is not implemented to allow concurrent usage
        // TODO maybe implement merge
        PageBtree page = index.getPage(childPageIds[at]);
        SearchRow last = page.remove(row);
        index.getPageStore().logUndo(this, data);
        updateRowCount(-1);
        written = false;
        changeCount = index.getPageStore().getChangeCount();
        if (last == null) {

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        return this;
    }


    SearchRow remove(SearchRow row) {
        int at = find(row, false, false, true);
        SearchRow delete = getRow(at);
        if (index.compareRows(row, delete) != 0 || delete.getKey() != row.getKey()) {
            throw DbException.get(ErrorCode.ROW_NOT_FOUND_WHEN_DELETING_1, index.getSQL() + ": " + row);
        }
        index.getPageStore().logUndo(this, data);
        if (entryCount == 1) {
            // the page is now empty

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        }
        int memory = Constants.MEMORY_PAGE_BTREE + index.getPageStore().getPageSize();
        if (rows != null) {
            memory += getEntryCount() * (4 + Constants.MEMORY_POINTER);
            for (int i = 0; i < entryCount; i++) {
                SearchRow r = rows[i];
                if (r != null) {
                    memory += r.getMemory();
                }
            }
        }
        index.memoryChange(memory >> 2);
    }

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        }
        int l = 0, r = entryCount;
        int comp = 1;
        while (l < r) {
            int i = (l + r) >>> 1;
            SearchRow row = getRow(i);
            comp = index.compareRows(row, compare);
            if (comp == 0) {
                if (add && index.indexType.isUnique()) {
                    if (!index.containsNullAndAllowMultipleNull(compare)) {
                        throw index.getDuplicateKeyException();

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     *
     * @param at the index
     * @return the row
     */
    SearchRow getRow(int at) {
        SearchRow row = rows[at];
        if (row == null) {
            row = index.readRow(data, offsets[at], onlyPosition, true);
            memoryChange();
            rows[at] = row;
        } else if (!index.hasData(row)) {
            row = index.readRow(row.getKey());
            memoryChange();
            rows[at] = row;
        }
        return row;
    }

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