// upsertRowPKs returns the primary keys of any rows with potential upsert
// conflicts.
func (tu *tableUpserter) upsertRowPKs() ([]roachpb.Key, error) {
upsertRowPKs := make([]roachpb.Key, len(tu.insertRows))
if tu.conflictIndex.ID == tu.tableDesc.PrimaryIndex.ID {
// If the conflict index is the primary index, we can compute them directly.
// In this case, the slice will be filled, but not all rows will have
// conflicts.
for i, insertRow := range tu.insertRows {
upsertRowPK, _, err := sqlbase.EncodeIndexKey(
tu.tableDesc, &tu.conflictIndex, tu.ri.insertColIDtoRowIndex, insertRow, tu.indexKeyPrefix)
if err != nil {
return nil, err
}
upsertRowPKs[i] = upsertRowPK
}
return upsertRowPKs, nil
}
// Otherwise, compute the keys for the conflict index and look them up. The
// primary keys can be constructed from the entries that come back. In this
// case, some spots in the slice will be nil (indicating no conflict) and the
// others will be conflicting rows.
b := tu.txn.NewBatch()
for _, insertRow := range tu.insertRows {
entry, err := sqlbase.EncodeSecondaryIndex(
tu.tableDesc, &tu.conflictIndex, tu.ri.insertColIDtoRowIndex, insertRow)
if err != nil {
return nil, err
}
if log.V(2) {
log.Infof("Get %s\n", entry.Key)
}
b.Get(entry.Key)
}
if err := tu.txn.Run(b); err != nil {
return nil, err
}
for i, result := range b.Results {
// if len(result.Rows) == 0, then no conflict for this row, so leave
// upsertRowPKs[i] as nil.
if len(result.Rows) == 1 {
if result.Rows[0].Value == nil {
upsertRowPKs[i] = nil
} else {
upsertRowPK, err := sqlbase.ExtractIndexKey(&tu.a, tu.tableDesc, result.Rows[0])
if err != nil {
return nil, err
}
upsertRowPKs[i] = upsertRowPK
}
} else if len(result.Rows) > 1 {
panic(fmt.Errorf(
"Expected <= 1 but got %d conflicts for row %s", len(result.Rows), tu.insertRows[i]))
}
}
return upsertRowPKs, nil
}
// deleteIndexRow adds to the batch the kv operations necessary to delete a
// table row from the given index.
func (rd *rowDeleter) deleteIndexRow(
ctx context.Context, b *client.Batch, idx *sqlbase.IndexDescriptor, values []parser.Datum,
) error {
if err := rd.fks.checkAll(values); err != nil {
return err
}
secondaryIndexEntry, err := sqlbase.EncodeSecondaryIndex(
rd.helper.tableDesc, idx, rd.fetchColIDtoRowIndex, values)
if err != nil {
return err
}
if log.V(2) {
log.Infof(ctx, "Del %s", secondaryIndexEntry.Key)
}
b.Del(secondaryIndexEntry.Key)
return nil
}