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Requests during a table's DELETING window answer differently from DynamoDB

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#505 0 comentarios 0 reacciones 1 asignado Ver en GitHub

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@LeeroyHannigan ya está trabajando en esto.

Desde el 25/10/2026.

  • #550 de @LeeroyHannigan — abierto

Evaluación

Dificultad
4/5
Tiempo estimado
3-5 días
Aptitud para principiantes
48/100
Tipo de issue
Error
Claridad
Bastante claro
Estado de actividad
Activo
Stack tecnológico
postgresql, rust
Área
backend, databases

Línea de trabajo

Start with crates/storage-postgres/src/delete_table.rs and update_table.rs, then trace the data-plane table lookup that excludes DELETING rows. Compare the PostgreSQL behavior with the DynamoDB responses listed for the four requests; the other backends are unmeasured. Done means the control-plane requests return the stated service error and the data-plane behavior during deletion is decided and matches the service.

Escrito por el modelo de indexación a partir del texto del issue.

Descripción

bug postgresql

Summary

While a table is DELETING, ExtendDB answers four requests differently from DynamoDB. The service reports the window as a table that is still there and in use; ExtendDB reports it as a table that does not exist, or with a different sentence.

Measured on the service 2026-10-24 09:30 UTC (two repeats, identical) and on ExtendDB with the PostgreSQL backend at main 744ea291 and on #504, with the window held open by an ACCESS SHARE lock on the table's data table. The other backends are not measured here.

Request during the window ExtendDB DynamoDB
second DeleteTable 400 ResourceNotFoundException Requested resource not found 400 ResourceInUseException Attempt to change a resource which is still in use: Table is being deleted: <name>
UpdateTable (any member) 400 ResourceInUseException Table <name> is not in ACTIVE state 400 ResourceInUseException Attempt to change a resource which is still in use: Table is being deleted: <name>
PutItem 400 ResourceNotFoundException 200
GetItem 400 ResourceNotFoundException 200 with the item

DescribeTable (TableStatus DELETING) and CreateTable with the name (ResourceInUseException Table already exists: <name>) match the service.

Cause

crates/storage-postgres/src/delete_table.rs selects the row WHERE ... table_status IN ('ACTIVE', 'CREATING'), so a DELETING row reads as TableNotFound. update_table.rs locks the row and answers TableNotActive for any status other than ACTIVE, which the engine words as Table <name> is not in ACTIVE state. The data-plane table lookup excludes DELETING rows, so reads and writes answer ResourceNotFoundException until the row is gone.

Fix shape

For the two control-plane requests, look the name up without the status filter when the filtered select returns nothing and answer a DELETING row with the service's sentence; delete_table.rs already does this for a table that is being restored. For the data plane, the service serves reads and writes until the table is gone, so the lookup would include DELETING rows; whether writes during the window should be served or refused is a design question, since a write that lands between the data drop and the row delete is lost on both sides.

With the default delete delay the window on ExtendDB lasts as long as the data drop takes, so a client only sees it when another connection holds a lock on the table's data.

Found while fixing #449 (#504).

Lenguaje dominante
Rust
Estrellas
517
Forks
60
Merge medio
4 d 22 h
PR fusionados (30 d)
40

Preparar el entorno

Primeros pasos

  1. Lee el issue completo y luego la guía de contribución del proyecto.
  2. Comenta en el issue que vas a ocuparte — evita que dos personas hagan lo mismo.
  3. Haz un fork del repositorio y trabaja en una rama.
  4. Abre un pull request que haga referencia al número del issue.

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