Datasets:

LeeMirror013
/

booru-quality-80-union-db

DB	Purpose
`quality_80_union.db`	Main query DB: Gelbooru 80 selection union Danbooru 80 selection, deduped by md5
`gelbooru.db`	Normalized Gelbooru source metadata
`danbooru2025_candidate.db`	Danbooru source metadata with md5
`danbooru.db`	Older Danbooru DB retained for compatibility

SQLite -shm and -wal files are runtime sidecars. They are not part of the durable data model.

quality_80_union.db

images

2,988,704 rows. Primary key: md5.

Column	Type	Meaning
`md5`	TEXT PK	File hash used for deduplication
`canonical_rating`	TEXT	Stricter merged rating
`canonical_file_url`	TEXT	Unified original file URL
`canonical_preview_url`	TEXT	Unified preview URL, mostly Gelbooru
`canonical_sample_url`	TEXT	Unified sample URL, mostly Gelbooru
`canonical_source`	TEXT	Unified source URL
`canonical_width`	INTEGER	Unified image width
`canonical_height`	INTEGER	Unified image height
`present_in_gelbooru`	INTEGER	1 if this md5 exists in Gelbooru
`present_in_danbooru`	INTEGER	1 if this md5 exists in Danbooru
`selected_by_gelbooru80`	INTEGER	1 if selected by Gelbooru 80th-threshold rule
`selected_by_danbooru80`	INTEGER	1 if selected by Danbooru 80th-threshold rule
`quality_score`	REAL	`max(gelbooru_score_pct, danbooru_score_pct)`, range `0..1`
`quality_tier`	TEXT	Current tier label, `p80`
`gelbooru_id`	INTEGER	Gelbooru post ID, nullable
`gelbooru_rating`	TEXT	Gelbooru rating, nullable
`gelbooru_score`	INTEGER	Gelbooru raw score, nullable
`gelbooru_score_pct`	REAL	Gelbooru rating-bucket percentile, nullable
`gelbooru_file_url`	TEXT	Gelbooru original file URL, nullable
`gelbooru_preview_url`	TEXT	Gelbooru preview URL, nullable
`gelbooru_sample_url`	TEXT	Gelbooru sample URL, nullable
`gelbooru_source`	TEXT	Gelbooru source URL/text, nullable
`gelbooru_tags_text`	TEXT	Gelbooru raw tag string, nullable
`gelbooru_status`	TEXT	Gelbooru post status, nullable
`danbooru_id`	INTEGER	Danbooru post ID, nullable
`danbooru_rating`	TEXT	Danbooru rating mapped to full names, nullable
`danbooru_score`	INTEGER	Danbooru raw score, nullable
`danbooru_score_pct`	REAL	Danbooru rating-bucket percentile, nullable
`danbooru_file_url`	TEXT	Danbooru original file URL, nullable
`danbooru_source`	TEXT	Danbooru source URL/text, nullable
`danbooru_pixiv_id`	INTEGER	Pixiv artwork ID from Danbooru, nullable
`danbooru_fav_count`	INTEGER	Danbooru favorite count, nullable
`danbooru_file_size`	INTEGER	Danbooru file size in bytes, nullable
`danbooru_file_ext`	TEXT	Danbooru file extension, nullable
`image_parquet_file`	TEXT	Future local image parquet shard filename, nullable

Source-specific fields are nullable because the DB is a union. Use present_in_gelbooru and present_in_danbooru to interpret which side fields are expected to exist. image_parquet_file is intentionally nullable until image parquet shards are written by a later storage pipeline.

URL Fields

Field	Non-empty rows
`canonical_file_url`	2,988,704
`canonical_preview_url`	2,696,467
`canonical_sample_url`	1,667,457
`canonical_source`	2,766,129
`gelbooru_file_url`	2,696,467
`gelbooru_preview_url`	2,696,467
`gelbooru_sample_url`	1,667,457
`gelbooru_source`	2,451,875
`danbooru_file_url`	2,428,840
`danbooru_source`	2,386,988

Use canonical_file_url for a single original image URL. Use source-specific URL fields when the caller needs provenance.

Table	Meaning
`gelbooru_image_tags(md5, tag_name)`	Gelbooru tag associations
`danbooru_image_tags(md5, tag_name, tag_type)`	Danbooru tag associations

Quality Score

quality_score uses rating_bucket_cume_dist_v1.

pct(score, rating) = count(score <= current_score within rating) / count(rating)
quality_score = max(gelbooru_score_pct, danbooru_score_pct)

Current verified counts:

Metric	Count
Total images	2,988,704
`quality_score >= 0.8`	2,973,255
`quality_score < 0.8`	15,449
`quality_score = 1.0`	9
Selected by Gelbooru 80	2,034,916
Selected by Danbooru 80	1,850,329
Selected by both	896,541
Selected by neither	0
Present in both sources	2,136,603

The DB is still the union of both raw 80th-threshold selections. The <0.8 rows are boundary rows caused by discrete raw-score buckets after true percentile repair.

gelbooru.db

Verified counts:

Metric	Count
posts	9,956,288
tags	931,306
post_tags	321,358,388

Main schema:

posts(id, created_at, score, width, height, md5, directory, image,
      rating, source, change, owner, creator_id, parent_id, sample,
      preview_height, preview_width, tags, title, has_notes, has_comments,
      file_url, preview_url, sample_url, sample_height, sample_width,
      status, post_locked, has_children, attr_limit, attr_offset, attr_count)

tags(id, name)
post_tags(post_id, tag_id)

danbooru2025_candidate.db

Verified counts:

Metric	Count
posts	9,113,284
tags	859,440
post_tags	330,953,940

Main schema:

posts(id, pixiv_id, source, rating, score, fav_count,
      image_width, image_height, file_size, file_ext,
      md5, file_url, created_at, updated_at, uploader_id, parent_id)

tags(id, name, type)
post_tags(post_id, tag_id)

Danbooru raw ratings are g, s, q, e; the union DB maps them to general, sensitive, questionable, explicit.

Rebuild and Repair

/Users/charslee/miniconda3/bin/python3 convert_gelbooru.py --overwrite

/Users/charslee/miniconda3/bin/python3 convert_danbooru.py \
  --output-db /Users/charslee/Repo/private/pixiv_spider/danbooru2025_candidate.db

/Users/charslee/miniconda3/bin/python3 build_quality_union_db.py --overwrite

/Users/charslee/miniconda3/bin/python3 repair_quality_percentiles.py

Known Technical Debt

quality_80_union.db keeps staging tables: selected_md5, selected_gelbooru_posts, selected_danbooru_posts.
quality_80_union.db keeps percentile lookup tables: gel_score_percentiles, dan_score_percentiles.
Do not vacuum or rebuild the 26 GB union DB by default on low free disk space. A safe cleanup needs enough temporary room for SQLite to rewrite the database.