README.md

metadata

pretty_name: SchemaPile
tags:
  - SQL
  - Schemas
dataset_info:
  features:
    - name: ID
      dtype: string
    - name: FILENAME
      dtype: string
    - name: URL
      dtype: string
    - name: LICENSE
      dtype: string
    - name: PERMISSIVE
      dtype: bool
    - name: TABLES
      list:
        - name: TABLE_NAME
          dtype: string
        - name: COLUMNS
          list:
            - name: NAME
              dtype: string
            - name: TYPE
              dtype: string
            - name: NULLABLE
              dtype: bool
            - name: UNIQUE
              dtype: bool
            - name: DEFAULT
              dtype: string
            - name: CHECKS
              sequence: string
            - name: IS_PRIMARY
              dtype: bool
            - name: IS_INDEX
              dtype: bool
            - name: VALUES
              sequence: string
        - name: PRIMARY_KEYS
          sequence: string
        - name: FOREIGN_KEYS
          list:
            - name: COLUMNS
              sequence: string
            - name: FOREIGN_TABLE
              dtype: string
            - name: REFERRED_COLUMNS
              sequence: string
            - name: ON_DELETE
              dtype: string
            - name: ON_UPDATE
              dtype: string
        - name: CHECKS
          sequence: string
        - name: INDEXES
          sequence: string
  splits:
    - name: full
      num_bytes: 142346554
      num_examples: 22989
  download_size: 39308883
  dataset_size: 142346554
configs:
  - config_name: default
    data_files:
      - split: full
        path: data/full-*

SchemaPile

Usage

from datasets import load_dataset
ds = load_dataset("trl-lab/schemapile", split="full")
print(f"Loaded dataset with {len(ds)} records.")
print(ds[0])

Description

SchemaPile is a collection of database schemas extracted from various sources, normalized for consistency and ease of use in machine learning workflows. Each record contains metadata (INFO), licensing information, permissiveness, and a list of tables with detailed column specifications.

Schema

• INFO:

  • ID: Unique identifier (from filename prefix)
  • FILENAME: Original filename
  • Additional metadata fields

• LICENSE: License string (if available)

• PERMISSIVE: Boolean indicating permissive license

• TABLES: List of tables, each with:

  • TABLE_NAME: Name of the table
  • COLUMNS: List of columns, each with:
    • NAME, TYPE, NULLABLE, UNIQUE, DEFAULT, CHECKS, IS_PRIMARY, IS_INDEX, VALUES
  • PRIMARY_KEYS, FOREIGN_KEYS, CHECKS, INDEXES

Citation

If you use SchemaPile in your research, please cite:

@article{dohmen2024schemapile,
  title={Schemapile: A large collection of relational database schemas},
  author={D{"o}hmen, Till and Geacu, Radu and Hulsebos, Madelon and Schelter, Sebastian},
  journal={Proceedings of the ACM on Management of Data},
  volume={2},
  number={3},
  pages={1--25},
  year={2024},
  publisher={ACM New York, NY, USA}

Read the paper

Website

For more information, visit the SchemaPile website.

License

See individual record LICENSE fields for details. The PERMISSIVE flag indicates whether the schema is under a permissive license.