Exemple #1
0
        private RawTableInfo GetRawTableInfo(RawTableInfo info, BigList <long> rows)
        {
            if (this is IRootTable)
            {
                info.Add((IRootTable)this, CalculateTableRows());
            }
            else
            {
                for (int i = 0; i < Tables.Length; ++i)
                {
                    // Resolve the rows into the parents indices.
                    var newRowSet = ResolveTableRows(rows, i).ToBigList();

                    var table = Tables[i];
                    if (table is IRootTable)
                    {
                        info.Add((IRootTable)table, newRowSet);
                    }
                    else if (table is JoinedTable)
                    {
                        ((JoinedTable)table).GetRawTableInfo(info, newRowSet);
                    }
                }
            }

            return(info);
        }
Exemple #2
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        protected override RawTableInfo GetRawTableInfo(RawTableInfo rootInfo)
        {
            var rows = this.Select(row => row.Number).ToBigList();

            rootInfo.Add(this, rows);
            return(rootInfo);
        }
Exemple #3
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        protected override RawTableInfo GetRawTableInfo(RawTableInfo rootInfo)
        {
            var size    = RowCount;
            var allList = new BigList <long>(size);

            for (long i = 0; i < size; ++i)
            {
                allList.Add(i);
            }

            return(GetRawTableInfo(rootInfo, allList));
        }
 RawTableInfo IVirtualTable.GetRawTableInfo(RawTableInfo rootInfo)
 {
     return(GetRawTableInfo(rootInfo));
 }
 protected abstract RawTableInfo GetRawTableInfo(RawTableInfo rootInfo);
Exemple #6
0
        public RawTableInfo Union(RawTableInfo info)
        {
            // Number of Table 'columns'

            int colCount = tableItems.Count;

            var merge1 = SortItems();
            var merge2 = info.SortItems();

            long size1 = -1;
            long size2 = -1;

            // First check number of tables in each merge is correct.

            if (merge1.Length != merge2.Length)
            {
                throw new InvalidOperationException("Incorrect format in table union");
            }

            // Check each table in the merge1 set has identical length row_sets

            for (long i = 0; i < merge1.Length; ++i)
            {
                if (size1 == -1)
                {
                    size1 = merge1[i].Rows.Count;
                }
                else
                {
                    if (size1 != merge1[i].Rows.Count)
                    {
                        throw new InvalidOperationException("Incorrect format in table union");
                    }
                }
            }

            // Check each table in the merge2 set has identical length row_sets

            for (long i = 0; i < merge2.Length; ++i)
            {
                // Check the tables in merge2 are identical to the tables in merge1
                if (!merge2[i].Table.Equals(merge1[i].Table))
                {
                    throw new InvalidOperationException("Incorrect format in table union");
                }

                if (size2 == -1)
                {
                    size2 = merge2[i].Rows.Count;
                }
                else
                {
                    if (size2 != merge2[i].Rows.Count)
                    {
                        throw new InvalidOperationException("Incorrect format in table union");
                    }
                }
            }

            // If size1 or size2 are -1 then we have a corrupt table.  (It will be
            // 0 for an empty table).

            if (size1 == -1 || size2 == -1)
            {
                throw new InvalidOperationException("Incorrect format in table union");
            }

            // We don't need information in 'raw_info' vector anymore so clear it.
            // This may help garbage collection.

            var resultItems = new List <RawTableItem>();

            // Merge the two together into a new list of RawRowElement[]

            var mergeSize  = size1 + size2;
            var elems      = new BigArray <RawRowItem>(mergeSize);
            int elemsIndex = 0;

            for (long i = 0; i < size1; ++i)
            {
                var itemRows = new BigArray <long>(colCount);

                for (int n = 0; n < colCount; ++n)
                {
                    itemRows[n] = merge1[n].Rows[i];
                }

                elems[elemsIndex] = new RawRowItem(itemRows);
                ++elemsIndex;
            }

            for (long i = 0; i < size2; ++i)
            {
                var itemRows = new BigArray <long>(colCount);

                for (int n = 0; n < colCount; ++n)
                {
                    itemRows[n] = merge2[n].Rows[i];
                }

                elems[elemsIndex] = new RawRowItem(itemRows);
                ++elemsIndex;
            }

            // Now sort the row elements into order.

            BigArray <RawRowItem> .QuickSort(elems);

            // Remove any duplicate rows.

            for (int i = 0; i < colCount; ++i)
            {
                merge1[i].Rows.Clear();
            }

            RawRowItem previous = null;

            for (int n = 0; n < mergeSize; ++n)
            {
                var current = elems[n];

                // Check that the current element in the set is not a duplicate of the
                // previous.

                if (previous == null || previous.CompareTo(current) != 0)
                {
                    for (int i = 0; i < colCount; ++i)
                    {
                        merge1[i].Rows.Add(current.RowValues[i]);
                    }
                    previous = current;
                }
            }

            for (int i = 0; i < colCount; ++i)
            {
                resultItems.Add(merge1[i]);
            }

            return(new RawTableInfo(resultItems.ToArray()));
        }
 protected override RawTableInfo GetRawTableInfo(RawTableInfo rootInfo)
 {
     return(Parent.GetRawTableInfo(rootInfo));
 }