uuid in Merge

[William_Scardua]

Hi guys,

I'm trying to use uuid in the merge but I always get an error...

import uuid
 
(
  df_events.alias("events").merge(
    source = df_updates.alias("updates"),
    condition = "events.cod = updates.cod and events.num = updates.num"
  ).whenMatchedUpdate(
    set =
      {
      "events.cod" : "updates.cod",
      "events.num_c" : "updates.num_contrato",
      "events.status": lit("Updated")"
      }
  ).whenNotMatchedInsert(values =
    {
      "events.id" : uuid.uuid4(),
      "events.cod" : "updates.cod",
      "events.num" : "updates.num",
      "events.status" : lit("Inserted")
    }
  )
  .execute()
)

have any tips ?

[User16752242622]

Hi @William Scardua​ 

Could you please more details? Which DBR version you are currently using?

Please share the error stack trace or snapshot with us.

Is it while importing the UUID module?

[William_Scardua]

Hi @Akash Bhat​ 

My cluster version is: 9.1 LTS (includes Apache Spark 3.1.2, Scala 2.12)

This error occurs when I run the cell

TypeError: Values of dict in 'values' in whenNotMatchedInsert must contain only Spark SQL Columns or strings (expressions in SQL syntax) as values, found '202d282c-045a-402c-895f-832c4c3a5190' of type '<class 'uuid.UUID'>'

 

[Sivaprasad1]

@William Scardua​ :

Could you please refer to https://stackoverflow.com/questions/15859156/python-how-to-convert-a-valid-uuid-from-string-to-uuid

might be helpful

[William_Scardua]

Hi @Sivaprasad C S​  I tried to convert with uuid4().hex see the error it reported

  ).whenNotMatchedInsert(values =
    {
      "events.id" : uuid.uuid4().hex,
      "events.cod_operadora" : "updates.cod_operadora",
      "events.num_contrato" : "updates.num_contrato",
      "events.qtd_residencia_ok": "updates.qtd_residencia_ok",
      "events.data_atualiz": lit("Inclusao")
    }

AnalysisException: cannot resolve `b6ff50957b0f492ca082e10227f07638` in INSERT clause given columns updates.`id` ...

[Hubert-Dudek]

wrap it in lit 🙂 As it is looking for variable or field equal to uuid

lit(uuid.uuid4().hex)

[William_Scardua]

Hi @Hubert Dudek​ 

in this case UUID are repeted

[Anonymous]

Hi @William Scardua​ 

Hope all is well! Just wanted to check in if you were able to resolve your issue and would you be happy to share the solution or mark an answer as best? Else please let us know if you need more help. 

We'd love to hear from you.

Thanks!