// writeMutation writes the mutation to the table descriptor. If the
// State or the Direction is undefined, these values are populated via
// picking random values before the mutation is written.
func (mt mutationTest) writeMutation(m csql.DescriptorMutation) {
if m.Direction == csql.DescriptorMutation_NONE {
// randomly pick ADD/DROP mutation.
r := rand.Intn(2)
if r == 0 {
m.Direction = csql.DescriptorMutation_ADD
} else {
m.Direction = csql.DescriptorMutation_DROP
}
}
if m.State == csql.DescriptorMutation_UNKNOWN {
// randomly pick DELETE_ONLY/WRITE_ONLY state.
r := rand.Intn(2)
if r == 0 {
m.State = csql.DescriptorMutation_DELETE_ONLY
} else {
m.State = csql.DescriptorMutation_WRITE_ONLY
}
}
tableDesc := mt.desc.GetTable()
tableDesc.Mutations = append(tableDesc.Mutations, m)
if err := tableDesc.Validate(); err != nil {
mt.Fatal(err)
}
if err := mt.kvDB.Put(mt.descKey, mt.desc); err != nil {
mt.Fatal(err)
}
}
// writeColumnMutation adds column as a mutation and writes the
// descriptor to the DB.
func (mt mutationTest) writeColumnMutation(t *testing.T, column string, state csql.DescriptorMutation_State) {
tableDesc := mt.desc.GetTable()
i, err := tableDesc.FindColumnByName(column)
if err != nil {
t.Fatal(err)
}
col := &tableDesc.Columns[i]
m := csql.DescriptorMutation{Descriptor_: &csql.DescriptorMutation_Column{Column: col}, State: state}
// randomly pick add/drop mutation.
r := rand.Intn(2)
if r == 0 {
m.Direction = csql.DescriptorMutation_ADD
} else {
m.Direction = csql.DescriptorMutation_DROP
}
tableDesc.Mutations = append(tableDesc.Mutations, m)
tableDesc.Columns = append(tableDesc.Columns[:i], tableDesc.Columns[i+1:]...)
if err := tableDesc.Validate(); err != nil {
t.Fatal(err)
}
if err := mt.kvDB.Put(mt.descKey, mt.desc); err != nil {
t.Fatal(err)
}
}