internal DataRow MergeRow(DataRow row, DataRow targetRow, bool preserveChanges, Index idxSearch) {
if (targetRow == null) {
targetRow = this.NewEmptyRow();
targetRow.oldRecord = recordManager.ImportRecord(row.Table, row.oldRecord);
targetRow.newRecord = targetRow.oldRecord;
if(row.oldRecord != row.newRecord) {
targetRow.newRecord = recordManager.ImportRecord(row.Table, row.newRecord);
}
InsertRow(targetRow, -1);
}
else {
// SQLBU 500789: Record Manager corruption during Merge when target row in edit state
// the newRecord would be freed and overwrite tempRecord (which became the newRecord)
// this would leave the DataRow referencing a freed record and leaking memory for the now lost record
int proposedRecord = targetRow.tempRecord; // by saving off the tempRecord, EndEdit won't free newRecord
targetRow.tempRecord = -1;
try {
DataRowState saveRowState = targetRow.RowState;
int saveIdxRecord = (saveRowState == DataRowState.Added) ? targetRow.newRecord : saveIdxRecord = targetRow.oldRecord;
int newRecord;
int oldRecord;
if (targetRow.RowState == DataRowState.Unchanged && row.RowState == DataRowState.Unchanged) {
// unchanged row merging with unchanged row
oldRecord = targetRow.oldRecord;
newRecord = (preserveChanges) ? recordManager.CopyRecord(this, oldRecord, -1) : targetRow.newRecord;
oldRecord = recordManager.CopyRecord(row.Table, row.oldRecord, targetRow.oldRecord);
SetMergeRecords(targetRow, newRecord, oldRecord, DataRowAction.Change);
}
else if (row.newRecord == -1) {
// Incoming row is deleted
oldRecord = targetRow.oldRecord;
if (preserveChanges) {
newRecord = (targetRow.RowState == DataRowState.Unchanged)? recordManager.CopyRecord(this, oldRecord, -1) : targetRow.newRecord;
}
else
newRecord = -1;
oldRecord = recordManager.CopyRecord(row.Table, row.oldRecord, oldRecord);
// Change index record, need to update index
if (saveIdxRecord != ((saveRowState == DataRowState.Added) ? newRecord : oldRecord)) {
SetMergeRecords(targetRow, newRecord, oldRecord, (newRecord == -1) ? DataRowAction.Delete : DataRowAction.Change);
idxSearch.Reset();
saveIdxRecord = ((saveRowState == DataRowState.Added) ? newRecord : oldRecord);
} else {
SetMergeRecords(targetRow, newRecord, oldRecord, (newRecord == -1) ? DataRowAction.Delete : DataRowAction.Change);
}
}
else {
// incoming row is added, modified or unchanged (targetRow is not unchanged)
oldRecord = targetRow.oldRecord;
newRecord = targetRow.newRecord;
if (targetRow.RowState == DataRowState.Unchanged) {
newRecord = recordManager.CopyRecord(this, oldRecord, -1);
}
oldRecord = recordManager.CopyRecord(row.Table, row.oldRecord, oldRecord);
if (!preserveChanges) {
newRecord = recordManager.CopyRecord(row.Table, row.newRecord, newRecord);
}
SetMergeRecords(targetRow, newRecord, oldRecord, DataRowAction.Change);
}
if (saveRowState == DataRowState.Added && targetRow.oldRecord != -1)
idxSearch.Reset();
Debug.Assert(saveIdxRecord == ((saveRowState == DataRowState.Added) ? targetRow.newRecord : targetRow.oldRecord), "oops, you change index record without noticing it");
}
finally {
targetRow.tempRecord = proposedRecord;
}
}
// Merge all errors
if (row.HasErrors) {
if (targetRow.RowError.Length == 0) {
targetRow.RowError = row.RowError;
} else {
targetRow.RowError += " ]:[ " + row.RowError;
}
DataColumn[] cols = row.GetColumnsInError();
for (int i = 0; i < cols.Length; i++) {
DataColumn col = targetRow.Table.Columns[cols[i].ColumnName];
targetRow.SetColumnError(col, row.GetColumnError(cols[i]));
}
}else {
if (!preserveChanges) {
targetRow.ClearErrors();
}
}
return targetRow;
}
internal DataRow MergeRow(DataRow row, DataRow targetRow, bool preserveChanges, Index idxSearch)
{
if (targetRow == null)
{
targetRow = this.NewEmptyRow();
targetRow.oldRecord = this.recordManager.ImportRecord(row.Table, row.oldRecord);
targetRow.newRecord = targetRow.oldRecord;
if (row.oldRecord != row.newRecord)
{
targetRow.newRecord = this.recordManager.ImportRecord(row.Table, row.newRecord);
}
this.InsertRow(targetRow, -1L);
}
else
{
int tempRecord = targetRow.tempRecord;
targetRow.tempRecord = -1;
try
{
int oldRecord;
int newRecord;
int num4;
DataRowState rowState = targetRow.RowState;
num4 = (rowState == DataRowState.Added) ? targetRow.newRecord : (num4 = targetRow.oldRecord);
if ((targetRow.RowState == DataRowState.Unchanged) && (row.RowState == DataRowState.Unchanged))
{
oldRecord = targetRow.oldRecord;
newRecord = preserveChanges ? this.recordManager.CopyRecord(this, oldRecord, -1) : targetRow.newRecord;
oldRecord = this.recordManager.CopyRecord(row.Table, row.oldRecord, targetRow.oldRecord);
this.SetMergeRecords(targetRow, newRecord, oldRecord, DataRowAction.Change);
}
else if (row.newRecord == -1)
{
oldRecord = targetRow.oldRecord;
if (preserveChanges)
{
newRecord = (targetRow.RowState == DataRowState.Unchanged) ? this.recordManager.CopyRecord(this, oldRecord, -1) : targetRow.newRecord;
}
else
{
newRecord = -1;
}
oldRecord = this.recordManager.CopyRecord(row.Table, row.oldRecord, oldRecord);
if (num4 != ((rowState == DataRowState.Added) ? newRecord : oldRecord))
{
this.SetMergeRecords(targetRow, newRecord, oldRecord, (newRecord == -1) ? DataRowAction.Delete : DataRowAction.Change);
idxSearch.Reset();
num4 = (rowState == DataRowState.Added) ? newRecord : oldRecord;
}
else
{
this.SetMergeRecords(targetRow, newRecord, oldRecord, (newRecord == -1) ? DataRowAction.Delete : DataRowAction.Change);
}
}
else
{
oldRecord = targetRow.oldRecord;
newRecord = targetRow.newRecord;
if (targetRow.RowState == DataRowState.Unchanged)
{
newRecord = this.recordManager.CopyRecord(this, oldRecord, -1);
}
oldRecord = this.recordManager.CopyRecord(row.Table, row.oldRecord, oldRecord);
if (!preserveChanges)
{
newRecord = this.recordManager.CopyRecord(row.Table, row.newRecord, newRecord);
}
this.SetMergeRecords(targetRow, newRecord, oldRecord, DataRowAction.Change);
}
if ((rowState == DataRowState.Added) && (targetRow.oldRecord != -1))
{
idxSearch.Reset();
}
}
finally
{
targetRow.tempRecord = tempRecord;
}
}
if (row.HasErrors)
{
if (targetRow.RowError.Length == 0)
{
targetRow.RowError = row.RowError;
}
else
{
targetRow.RowError = targetRow.RowError + " ]:[ " + row.RowError;
}
DataColumn[] columnsInError = row.GetColumnsInError();
for (int i = 0; i < columnsInError.Length; i++)
{
DataColumn column = targetRow.Table.Columns[columnsInError[i].ColumnName];
targetRow.SetColumnError(column, row.GetColumnError(columnsInError[i]));
}
return targetRow;
}
if (!preserveChanges)
{
targetRow.ClearErrors();
}
return targetRow;
}