MongoDB: `Inconsistent column data: Failed to convert 'Decimal128(...)' to 'Decimal'.`

When you have a introspected schema with type Decimal (E.g. via https://docs.atlas.mongodb.com/sample-data/sample-airbnb/), you get an error like this when you try to query for the data:

Error in Prisma Client request: 

Invalid `prisma.listingsAndReviews.findMany()` invocation:
  Inconsistent column data: Failed to convert 'Decimal128(...)' to 'Decimal'.

Schema:

generator client {
  provider        = "prisma-client-js"
  previewFeatures = ["mongoDb"]
}

datasource db {
  provider = "mongodb"
  url      = env("DATABASE_URL")
}

type ListingsAndReviewsAddress {
  country         String
  country_code    String
  government_area String
  location        ListingsAndReviewsAddressLocation
  market          String
  street          String
  suburb          String
}

type ListingsAndReviewsAddressLocation {
  coordinates       Float[]
  is_location_exact Boolean
  type              String
}

type ListingsAndReviewsAvailability {
  availability_30  Int
  availability_365 Int
  availability_60  Int
  availability_90  Int
}

type ListingsAndReviewsHost {
  host_about                String
  host_has_profile_pic      Boolean
  host_id                   String
  host_identity_verified    Boolean
  host_is_superhost         Boolean
  host_listings_count       Int
  host_location             String
  host_name                 String
  host_neighbourhood        String
  host_picture_url          String
  host_response_rate        Int?
  host_response_time        String?
  host_thumbnail_url        String
  host_total_listings_count Int
  host_url                  String
  host_verifications        String[]
}

type ListingsAndReviewsImages {
  medium_url     String
  picture_url    String
  thumbnail_url  String
  xl_picture_url String
}

type ListingsAndReviewsReviewScores {
  review_scores_accuracy      Int?
  review_scores_checkin       Int?
  review_scores_cleanliness   Int?
  review_scores_communication Int?
  review_scores_location      Int?
  review_scores_rating        Int?
  review_scores_value         Int?
}

type ListingsAndReviewsReviews {
  id            String   @map("_id")
  comments      String?
  date          DateTime @db.Date
  listing_id    String
  reviewer_id   String
  reviewer_name String
}

model listingsAndReviews {
  id                    String                         @id @map("_id")
  access                String
  accommodates          Int
  address               ListingsAndReviewsAddress
  amenities             String[]
  availability          ListingsAndReviewsAvailability
  bathrooms             Decimal?
  bed_type              String
  bedrooms              Int?
  beds                  Int?
  calendar_last_scraped DateTime                       @db.Date
  cancellation_policy   String
  cleaning_fee          Decimal?
  description           String
  extra_people          Decimal
  first_review          DateTime?                      @db.Date
  guests_included       Decimal
  host                  ListingsAndReviewsHost
  house_rules           String
  images                ListingsAndReviewsImages
  interaction           String
  last_review           DateTime?                      @db.Date
  last_scraped          DateTime                       @db.Date
  listing_url           String
  maximum_nights        String
  minimum_nights        String
  monthly_price         Json?
  name                  String
  neighborhood_overview String
  notes                 String
  number_of_reviews     Int
  price                 Decimal
  property_type         String
  review_scores         ListingsAndReviewsReviewScores
  reviews               ListingsAndReviewsReviews[]
  reviews_per_month     Int?
  room_type             String
  security_deposit      Decimal?
  space                 String
  summary               String
  transit               String
  weekly_price          Decimal?

  @@index([property_type, room_type, beds], map: "property_type_1_room_type_1_beds_1")
  @@index([name], map: "name_1")
}

(Workaround of defining the field as Json also does not work because of https://github.com/prisma/prisma/issues/12097)

[janpio]

Introspection works fine, the listingsAndReviews above has many Decimal columns. But any interaction with them via the Query Engine leads to the reported error.

[ChristophP]

sure, will do