// updateRow adds to the batch the kv operations necessary to update a table row
// with the given values.
//
// The row corresponding to oldValues is updated with the ones in updateValues.
// Note that updateValues only contains the ones that are changing.
//
// The return value is only good until the next call to UpdateRow.
func (ru *rowUpdater) updateRow(
ctx context.Context, b *client.Batch, oldValues []parser.Datum, updateValues []parser.Datum,
) ([]parser.Datum, error) {
if len(oldValues) != len(ru.fetchCols) {
return nil, errors.Errorf("got %d values but expected %d", len(oldValues), len(ru.fetchCols))
}
if len(updateValues) != len(ru.updateCols) {
return nil, errors.Errorf("got %d values but expected %d", len(updateValues), len(ru.updateCols))
}
primaryIndexKey, secondaryIndexEntries, err := ru.helper.encodeIndexes(ru.fetchColIDtoRowIndex, oldValues)
if err != nil {
return nil, err
}
// The secondary index entries returned by rowHelper.encodeIndexes are only
// valid until the next call to encodeIndexes. We need to copy them so that
// we can compare against the new secondary index entries.
secondaryIndexEntries = append(ru.indexEntriesBuf[:0], secondaryIndexEntries...)
ru.indexEntriesBuf = secondaryIndexEntries
// Check that the new value types match the column types. This needs to
// happen before index encoding because certain datum types (i.e. tuple)
// cannot be used as index values.
for i, val := range updateValues {
if ru.marshalled[i], err = sqlbase.MarshalColumnValue(ru.updateCols[i], val); err != nil {
return nil, err
}
}
// Update the row values.
copy(ru.newValues, oldValues)
for i, updateCol := range ru.updateCols {
ru.newValues[ru.fetchColIDtoRowIndex[updateCol.ID]] = updateValues[i]
}
rowPrimaryKeyChanged := false
var newSecondaryIndexEntries []sqlbase.IndexEntry
if ru.primaryKeyColChange {
var newPrimaryIndexKey []byte
newPrimaryIndexKey, newSecondaryIndexEntries, err =
ru.helper.encodeIndexes(ru.fetchColIDtoRowIndex, ru.newValues)
if err != nil {
return nil, err
}
rowPrimaryKeyChanged = !bytes.Equal(primaryIndexKey, newPrimaryIndexKey)
} else {
newSecondaryIndexEntries, err =
ru.helper.encodeSecondaryIndexes(ru.fetchColIDtoRowIndex, ru.newValues)
if err != nil {
return nil, err
}
}
if rowPrimaryKeyChanged {
if err := ru.fks.checkIdx(ru.helper.tableDesc.PrimaryIndex.ID, oldValues, ru.newValues); err != nil {
return nil, err
}
for i := range newSecondaryIndexEntries {
if !bytes.Equal(newSecondaryIndexEntries[i].Key, secondaryIndexEntries[i].Key) {
if err := ru.fks.checkIdx(ru.helper.indexes[i].ID, oldValues, ru.newValues); err != nil {
return nil, err
}
}
}
if err := ru.rd.deleteRow(ctx, b, oldValues); err != nil {
return nil, err
}
if err := ru.ri.InsertRow(ctx, b, ru.newValues, false); err != nil {
return nil, err
}
return ru.newValues, nil
}
// Add the new values.
// TODO(dan): This has gotten very similar to the loop in insertRow, see if
// they can be DRY'd. Ideally, this would also work for
// truncateAndBackfillColumnsChunk, which is currently abusing rowUdpdater.
for i, family := range ru.helper.tableDesc.Families {
update := false
for _, colID := range family.ColumnIDs {
if _, ok := ru.updateColIDtoRowIndex[colID]; ok {
update = true
break
}
}
if !update {
continue
}
if i > 0 {
// HACK: MakeFamilyKey appends to its argument, so on every loop iteration
// after the first, trim primaryIndexKey so nothing gets overwritten.
// TODO(dan): Instead of this, use something like engine.ChunkAllocator.
primaryIndexKey = primaryIndexKey[:len(primaryIndexKey):len(primaryIndexKey)]
}
if len(family.ColumnIDs) == 1 && family.ColumnIDs[0] == family.DefaultColumnID {
// Storage optimization to store DefaultColumnID directly as a value. Also
// backwards compatible with the original BaseFormatVersion.
idx, ok := ru.updateColIDtoRowIndex[family.DefaultColumnID]
if !ok {
continue
}
ru.key = keys.MakeFamilyKey(primaryIndexKey, uint32(family.ID))
if log.V(2) {
log.Infof(ctx, "Put %s -> %v", ru.key, ru.marshalled[idx].PrettyPrint())
}
b.Put(&ru.key, &ru.marshalled[idx])
ru.key = nil
continue
}
ru.key = keys.MakeFamilyKey(primaryIndexKey, uint32(family.ID))
ru.valueBuf = ru.valueBuf[:0]
var lastColID sqlbase.ColumnID
familySortedColumnIDs, ok := ru.helper.sortedColumnFamily(family.ID)
if !ok {
panic("invalid family sorted column id map")
}
for _, colID := range familySortedColumnIDs {
if ru.helper.columnInPK(colID) {
if family.ID != 0 {
return nil, errors.Errorf("primary index column %d must be in family 0, was %d", colID, family.ID)
}
// Skip primary key columns as their values are encoded in the key of
// each family. Family 0 is guaranteed to exist and acts as a sentinel.
continue
}
idx, ok := ru.fetchColIDtoRowIndex[colID]
if !ok {
return nil, errors.Errorf("column %d was expected to be fetched, but wasn't", colID)
}
col := ru.fetchCols[idx]
if ru.newValues[idx].Compare(parser.DNull) == 0 {
continue
}
if lastColID > col.ID {
panic(fmt.Errorf("cannot write column id %d after %d", col.ID, lastColID))
}
colIDDiff := col.ID - lastColID
lastColID = col.ID
ru.valueBuf, err = sqlbase.EncodeTableValue(ru.valueBuf, colIDDiff, ru.newValues[idx])
if err != nil {
return nil, err
}
}
if family.ID != 0 && len(ru.valueBuf) == 0 {
// The family might have already existed but every column in it is being
// set to NULL, so delete it.
if log.V(2) {
log.Infof(ctx, "Del %s", ru.key)
}
b.Del(&ru.key)
} else {
ru.value.SetTuple(ru.valueBuf)
if log.V(2) {
log.Infof(ctx, "Put %s -> %v", ru.key, ru.value.PrettyPrint())
}
b.Put(&ru.key, &ru.value)
}
ru.key = nil
}
// Update secondary indexes.
for i, newSecondaryIndexEntry := range newSecondaryIndexEntries {
secondaryIndexEntry := secondaryIndexEntries[i]
secondaryKeyChanged := !bytes.Equal(newSecondaryIndexEntry.Key, secondaryIndexEntry.Key)
if secondaryKeyChanged {
if err := ru.fks.checkIdx(ru.helper.indexes[i].ID, oldValues, ru.newValues); err != nil {
return nil, err
}
if log.V(2) {
log.Infof(ctx, "Del %s", secondaryIndexEntry.Key)
}
b.Del(secondaryIndexEntry.Key)
// Do not update Indexes in the DELETE_ONLY state.
if _, ok := ru.deleteOnlyIndex[i]; !ok {
if log.V(2) {
log.Infof(ctx, "CPut %s -> %v", newSecondaryIndexEntry.Key, newSecondaryIndexEntry.Value.PrettyPrint())
}
b.CPut(newSecondaryIndexEntry.Key, &newSecondaryIndexEntry.Value, nil)
}
}
}
return ru.newValues, nil
}
func putMeta(b *client.Batch, key roachpb.Key, desc *roachpb.RangeDescriptor) {
b.Put(key, desc)
}
// insertPutFn is used by insertRow when conflicts should be ignored.
// logValue is used for pretty printing.
func insertPutFn(ctx context.Context, b *client.Batch, key *roachpb.Key, value *roachpb.Value) {
if log.V(2) {
log.InfofDepth(ctx, 1, "Put %s -> %s", *key, value.PrettyPrint())
}
b.Put(key, value)
}