/**
* For deferred update, get a deferred sparse row based on the deferred non-sparse row. Share the
* underlying columns. If there is no column bit map, make them the same row.
*
* @exception StandardException Thrown on error
*/
protected ExecRow makeDeferredSparseRow(
ExecRow deferredBaseRow, FormatableBitSet baseRowReadList, LanguageConnectionContext lcc)
throws StandardException {
ExecRow deferredSparseRow;
if (baseRowReadList == null) {
/* No sparse row */
deferredSparseRow = deferredBaseRow;
} else {
/*
** We need to do a fetch doing a partial row
** read. We need to shift our 1-based bit
** set to a zero based bit set like the store
** expects.
*/
deferredSparseRow = RowUtil.getEmptyValueRow(baseRowReadList.getLength() - 1, lcc);
/*
** getColumn(), setColumn(), and baseRowReadList are
** one-based.
*/
int fromPosition = 1;
for (int i = 1; i <= deferredSparseRow.nColumns(); i++) {
if (baseRowReadList.isSet(i)) {
deferredSparseRow.setColumn(i, deferredBaseRow.getColumn(fromPosition++));
}
}
}
return deferredSparseRow;
}
/**
* Restore the in-memory representation from the stream.
*
* <p>
*
* @exception ClassNotFoundException Thrown if the stored representation is serialized and a class
* named in the stream could not be found.
* @see java.io.Externalizable#readExternal
*/
private final void localReadExternal(ObjectInput in) throws IOException, ClassNotFoundException {
super.readExternal(in);
baseConglomerateId = in.readLong();
rowLocationColumn = in.readInt();
// read the column sort order info
FormatableBitSet ascDescBits = new FormatableBitSet();
ascDescBits.readExternal(in);
ascDescInfo = new boolean[ascDescBits.getLength()];
for (int i = 0; i < ascDescBits.getLength(); i++) ascDescInfo[i] = ascDescBits.isSet(i);
// In memory maintain a collation id per column in the template.
collation_ids = new int[format_ids.length];
if (SanityManager.DEBUG) {
SanityManager.ASSERT(!hasCollatedTypes);
}
// initialize all the entries to COLLATION_TYPE_UCS_BASIC,
// and then reset as necessary. For version ACCESS_B2I_V3_ID,
// this is the default and no resetting is necessary.
for (int i = 0; i < format_ids.length; i++)
collation_ids[i] = StringDataValue.COLLATION_TYPE_UCS_BASIC;
// initialize the unique with null setting to false, to be reset
// below when read from disk. For version ACCESS_B2I_V3_ID and
// ACCESS_B2I_V4_ID, this is the default and no resetting is necessary.
setUniqueWithDuplicateNulls(false);
if (conglom_format_id == StoredFormatIds.ACCESS_B2I_V4_ID
|| conglom_format_id == StoredFormatIds.ACCESS_B2I_V5_ID) {
// current format id, read collation info from disk
if (SanityManager.DEBUG) {
// length must include row location column and at least
// one other field.
SanityManager.ASSERT(collation_ids.length >= 2, "length = " + collation_ids.length);
}
hasCollatedTypes = ConglomerateUtil.readCollationIdArray(collation_ids, in);
} else if (conglom_format_id != StoredFormatIds.ACCESS_B2I_V3_ID) {
// Currently only V3, V4 and V5 should be possible in a Derby DB.
// Actual work for V3 is handled by default code above, so no
// special work is necessary.
if (SanityManager.DEBUG) {
SanityManager.THROWASSERT("Unexpected format id: " + conglom_format_id);
}
}
if (conglom_format_id == StoredFormatIds.ACCESS_B2I_V5_ID) {
setUniqueWithDuplicateNulls(in.readBoolean());
}
}
