def export_work_ratings():
query = '''
SELECT gr_user_rid AS user, gr_work_id AS item,
MEDIAN(rating) AS rating,
(array_agg(rating ORDER BY date_updated DESC))[1] AS last_rating,
MEDIAN(EXTRACT(EPOCH FROM date_updated)) AS timestamp,
COUNT(rating) AS nratings
FROM gr.interaction JOIN gr.book_ids USING (gr_book_id)
WHERE rating > 0 AND gr_work_id IS NOT NULL
GROUP BY gr_user_rid, gr_work_id
ORDER BY MIN(date_updated)
'''
with db.connect() as dbc:
_log.info('reading book ratings')
ratings = db.load_table(dbc,
query,
dtype={
'user': '******',
'item': 'i4',
'rating': 'f4',
'last_rating': 'f4',
'nratings': 'i4'
})
_log.info('writing ratings')
ratings.to_parquet('gr-work-ratings.parquet',
index=False,
compression='zstd',
compression_level=5)
def export_work_actions():
query = '''
SELECT gr_user_rid AS user, gr_work_id AS item,
COUNT(rating) AS nactions,
MIN(EXTRACT(EPOCH FROM date_updated)) AS first_time,
MAX(EXTRACT(EPOCH FROM date_updated)) AS last_time
FROM gr.interaction JOIN gr.book_ids USING (gr_book_id)
WHERE gr_work_id IS NOT NULL
GROUP BY gr_user_rid, gr_work_id
ORDER BY MIN(date_updated)
'''
with db.connect() as dbc:
_log.info('reading book shelf actions')
actions = db.load_table(dbc,
query,
dtype={
'user': '******',
'item': 'i4',
'nactions': 'i4'
})
_log.info('writing actions')
actions.to_parquet('gr-work-actions.parquet',
index=False,
compression='zstd',
compression_level=5)
def export_work_titles():
query = f'''
SELECT gr_work_id AS work_id, gr_work_rid, work_title
FROM gr.work_title
ORDER BY gr_work_rid
'''
with db.connect() as dbc:
_log.info('reading work titles')
books = db.load_table(dbc, query)
pq_fn = 'gr-work-titles.parquet'
_log.info('writing parquet to %s', pq_fn)
books.to_parquet(pq_fn, index=False)
_log.info('writing CSV')
books.to_csv('gr-work-titles.csv.gz', index=False)
def export_work_genres():
query = f'''
SELECT gr_work_id AS work_id, genre, sum(score::int) AS score
FROM gr.book_ids JOIN gr.book_genres USING (gr_book_rid)
GROUP BY work_id, genre
ORDER BY work_id, genre
'''
with db.connect() as dbc:
_log.info('reading work genres')
genres = db.load_table(dbc, query)
pq_fn = 'gr-work-genres.parquet'
_log.info('writing parquet to %s', pq_fn)
genres.to_parquet(pq_fn, index=False, compression='brotli')
_log.info('writing CSV')
genres.to_csv('gr-work-genres.csv.gz', index=False)
def export_book_ids():
query = '''
SELECT gr_book_rid, gr_book_id, gr_work_id, cluster
FROM gr.book_ids JOIN gr.book_cluster USING (gr_book_id)
ORDER BY gr_book_rid
'''
with db.connect() as dbc:
_log.info('reading book IDs')
books = db.load_table(dbc, query)
csv_fn = 'gr-book-ids.csv.gz'
pq_fn = 'gr-book-ids.parquet'
_log.info('writing CSV to %s', csv_fn)
books.to_csv(csv_fn, index=False)
_log.info('writing parquet to %s', pq_fn)
books.to_parquet(pq_fn, index=False)
def export_work_authors():
query = f'''
WITH
pairs AS (SELECT DISTINCT gr_work_id AS work_id, gr_author_id
FROM gr.book_ids JOIN gr.book_authors USING (gr_book_rid)
WHERE author_role = '' AND gr_work_id IS NOT NULL)
SELECT work_id, gr_author_id AS author_id, author_name
FROM pairs JOIN gr.author_info USING (gr_author_id)
ORDER BY work_id
'''
with db.connect() as dbc:
_log.info('reading work authors')
books = db.load_table(dbc, query)
pq_fn = 'gr-work-authors.parquet'
_log.info('writing parquet to %s', pq_fn)
books.to_parquet(pq_fn, index=False, compression='brotli')
_log.info('writing CSV')
books.to_csv('gr-work-authors.csv.gz', index=False)