func buildAutoincPlan(ins *sqlparser.Insert, autoinc *vindexes.Autoinc, route *engine.Route) error {
route.Generate = &engine.Generate{
Opcode: engine.SelectUnsharded,
Keyspace: autoinc.Sequence.Keyspace,
Query: fmt.Sprintf("select next value from `%s`", autoinc.Sequence.Name),
}
// If it's also a colvindex, we have to add a redirect from route.Values.
// Otherwise, we have to redirect from row[pos].
if autoinc.ColVindexNum >= 0 {
route.Generate.Value = route.Values.([]interface{})[autoinc.ColVindexNum]
route.Values.([]interface{})[autoinc.ColVindexNum] = ":" + engine.SeqVarName
return nil
}
row, pos := findOrInsertPos(ins, autoinc.Col)
val, err := valConvert(row[pos])
if err != nil {
return fmt.Errorf("could not convert val: %s, pos: %d: %v", sqlparser.String(row[pos]), pos, err)
}
route.Generate.Value = val
row[pos] = sqlparser.ValArg([]byte(":" + engine.SeqVarName))
return nil
}
