CREATE TABLE authors ( id   INTEGER PRIMARY KEY,
                              name TEXT NOT NULL COLLATE NOCASE,
                              sort TEXT COLLATE NOCASE,
                              UNIQUE(name)
                             );
CREATE TABLE books ( id      INTEGER PRIMARY KEY AUTOINCREMENT,
                             title     TEXT NOT NULL DEFAULT 'Unknown' COLLATE NOCASE,
                             sort      TEXT COLLATE NOCASE,
                             timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
                             pubdate   TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
                             series_index REAL NOT NULL DEFAULT 1.0,
                             author_sort TEXT COLLATE NOCASE,
                             isbn TEXT DEFAULT "" COLLATE NOCASE,
                             lccn TEXT DEFAULT "" COLLATE NOCASE,
                             path TEXT NOT NULL DEFAULT "",
                             flags INTEGER NOT NULL DEFAULT 1
                        , uuid TEXT, has_cover BOOL DEFAULT 0, last_modified TIMESTAMP NOT NULL DEFAULT "2000-01-01 00:00:00+00:00");
CREATE TABLE books_authors_link ( id INTEGER PRIMARY KEY,
                                          book INTEGER NOT NULL,
                                          author INTEGER NOT NULL,
                                          UNIQUE(book, author)
                                        );
CREATE TABLE books_languages_link ( id INTEGER PRIMARY KEY,
                                            book INTEGER NOT NULL,
                                            lang_code INTEGER NOT NULL,
                                            item_order INTEGER NOT NULL DEFAULT 0,
                                            UNIQUE(book, lang_code)
        );
CREATE TABLE books_plugin_data(id INTEGER PRIMARY KEY,
                                     book INTEGER NON NULL,
                                     name TEXT NON NULL,
                                     val TEXT NON NULL,
                                     UNIQUE(book,name));
CREATE TABLE books_publishers_link ( id INTEGER PRIMARY KEY,
                                          book INTEGER NOT NULL,
                                          publisher INTEGER NOT NULL,
                                          UNIQUE(book)
                                        );
CREATE TABLE books_ratings_link ( id INTEGER PRIMARY KEY,
                                          book INTEGER NOT NULL,
                                          rating INTEGER NOT NULL,
                                          UNIQUE(book, rating)
                                        );
CREATE TABLE books_series_link ( id INTEGER PRIMARY KEY,
                                          book INTEGER NOT NULL,
                                          series INTEGER NOT NULL,
                                          UNIQUE(book)
                                        );
CREATE TABLE books_tags_link ( id INTEGER PRIMARY KEY,
                                          book INTEGER NOT NULL,
                                          tag INTEGER NOT NULL,
                                          UNIQUE(book, tag)
                                        );
CREATE TABLE comments ( id INTEGER PRIMARY KEY,
                              book INTEGER NON NULL,
                              text TEXT NON NULL COLLATE NOCASE,
                              UNIQUE(book)
                            );
CREATE TABLE conversion_options ( id INTEGER PRIMARY KEY,
                                          format TEXT NOT NULL COLLATE NOCASE,
                                          book INTEGER,
                                          data BLOB NOT NULL,
                                          UNIQUE(format,book)
                                        );
CREATE TABLE custom_columns (
                    id       INTEGER PRIMARY KEY AUTOINCREMENT,
                    label    TEXT NOT NULL,
                    name     TEXT NOT NULL,
                    datatype TEXT NOT NULL,
                    mark_for_delete   BOOL DEFAULT 0 NOT NULL,
                    editable BOOL DEFAULT 1 NOT NULL,
                    display  TEXT DEFAULT "{}" NOT NULL,
                    is_multiple BOOL DEFAULT 0 NOT NULL,
                    normalized BOOL NOT NULL,
                    UNIQUE(label)
                );
CREATE TABLE data ( id     INTEGER PRIMARY KEY,
                            book   INTEGER NON NULL,
                            format TEXT NON NULL COLLATE NOCASE,
                            uncompressed_size INTEGER NON NULL,
                            name TEXT NON NULL,
                            UNIQUE(book, format)
);
CREATE TABLE feeds ( id   INTEGER PRIMARY KEY,
                              title TEXT NOT NULL,
                              script TEXT NOT NULL,
                              UNIQUE(title)
                             );
CREATE TABLE identifiers  ( id     INTEGER PRIMARY KEY,
                                    book   INTEGER NON NULL,
                                    type   TEXT NON NULL DEFAULT "isbn" COLLATE NOCASE,
                                    val    TEXT NON NULL COLLATE NOCASE,
                                    UNIQUE(book, type)
        );
CREATE TABLE languages    ( id        INTEGER PRIMARY KEY,
                                    lang_code TEXT NON NULL COLLATE NOCASE,
                                    UNIQUE(lang_code)
        );
CREATE TABLE library_id ( id   INTEGER PRIMARY KEY,
                                  uuid TEXT NOT NULL,
                                  UNIQUE(uuid)
        );
CREATE TABLE metadata_dirtied(id INTEGER PRIMARY KEY,
                             book INTEGER NOT NULL,
                             UNIQUE(book));
CREATE TABLE preferences(id INTEGER PRIMARY KEY,
                                 key TEXT NON NULL,
                                 val TEXT NON NULL,
                                 UNIQUE(key));
CREATE TABLE publishers ( id   INTEGER PRIMARY KEY,
                                  name TEXT NOT NULL COLLATE NOCASE,
                                  sort TEXT COLLATE NOCASE,
                                  UNIQUE(name)
                             );
CREATE TABLE ratings ( id   INTEGER PRIMARY KEY,
                               rating INTEGER CHECK(rating > -1 AND rating < 11),
                               UNIQUE (rating)
                             );
CREATE TABLE series ( id   INTEGER PRIMARY KEY,
                              name TEXT NOT NULL COLLATE NOCASE,
                              sort TEXT COLLATE NOCASE,
                              UNIQUE (name)
                             );
CREATE TABLE tags ( id   INTEGER PRIMARY KEY,
                            name TEXT NOT NULL COLLATE NOCASE,
                            UNIQUE (name)
                             );
CREATE VIEW meta AS
        SELECT id, title,
               (SELECT sortconcat(bal.id, name) FROM books_authors_link AS bal JOIN authors ON(author = authors.id) WHERE book = books.id) authors,
               (SELECT name FROM publishers WHERE publishers.id IN (SELECT publisher from books_publishers_link WHERE book=books.id)) publisher,
               (SELECT rating FROM ratings WHERE ratings.id IN (SELECT rating from books_ratings_link WHERE book=books.id)) rating,
               timestamp,
               (SELECT MAX(uncompressed_size) FROM data WHERE book=books.id) size,
               (SELECT concat(name) FROM tags WHERE tags.id IN (SELECT tag from books_tags_link WHERE book=books.id)) tags,
               (SELECT text FROM comments WHERE book=books.id) comments,
               (SELECT name FROM series WHERE series.id IN (SELECT series FROM books_series_link WHERE book=books.id)) series,
               series_index,
               sort,
               author_sort,
               (SELECT concat(format) FROM data WHERE data.book=books.id) formats,
               isbn,
               path,
               lccn,
               pubdate,
               flags,
               uuid
        FROM books;
CREATE VIEW tag_browser_authors AS SELECT
                    id,
                    name,
                    (SELECT COUNT(id) FROM books_authors_link WHERE author=authors.id) count,
                    (SELECT AVG(ratings.rating)
                     FROM books_authors_link AS tl, books_ratings_link AS bl, ratings
                     WHERE tl.author=authors.id AND bl.book=tl.book AND
                     ratings.id = bl.rating AND ratings.rating <> 0) avg_rating,
                     sort AS sort
                FROM authors;
CREATE VIEW tag_browser_filtered_authors AS SELECT
                    id,
                    name,
                    (SELECT COUNT(books_authors_link.id) FROM books_authors_link WHERE
                        author=authors.id AND books_list_filter(book)) count,
                    (SELECT AVG(ratings.rating)
                     FROM books_authors_link AS tl, books_ratings_link AS bl, ratings
                     WHERE tl.author=authors.id AND bl.book=tl.book AND
                     ratings.id = bl.rating AND ratings.rating <> 0 AND
                     books_list_filter(bl.book)) avg_rating,
                     sort AS sort
                FROM authors;
CREATE VIEW tag_browser_filtered_publishers AS SELECT
                    id,
                    name,
                    (SELECT COUNT(books_publishers_link.id) FROM books_publishers_link WHERE
                        publisher=publishers.id AND books_list_filter(book)) count,
                    (SELECT AVG(ratings.rating)
                     FROM books_publishers_link AS tl, books_ratings_link AS bl, ratings
                     WHERE tl.publisher=publishers.id AND bl.book=tl.book AND
                     ratings.id = bl.rating AND ratings.rating <> 0 AND
                     books_list_filter(bl.book)) avg_rating,
                     name AS sort
                FROM publishers;
CREATE VIEW tag_browser_filtered_ratings AS SELECT
                    id,
                    rating,
                    (SELECT COUNT(books_ratings_link.id) FROM books_ratings_link WHERE
                        rating=ratings.id AND books_list_filter(book)) count,
                    (SELECT AVG(ratings.rating)
                     FROM books_ratings_link AS tl, books_ratings_link AS bl, ratings
                     WHERE tl.rating=ratings.id AND bl.book=tl.book AND
                     ratings.id = bl.rating AND ratings.rating <> 0 AND
                     books_list_filter(bl.book)) avg_rating,
                     rating AS sort
                FROM ratings;
CREATE VIEW tag_browser_filtered_series AS SELECT
                    id,
                    name,
                    (SELECT COUNT(books_series_link.id) FROM books_series_link WHERE
                        series=series.id AND books_list_filter(book)) count,
                    (SELECT AVG(ratings.rating)
                     FROM books_series_link AS tl, books_ratings_link AS bl, ratings
                     WHERE tl.series=series.id AND bl.book=tl.book AND
                     ratings.id = bl.rating AND ratings.rating <> 0 AND
                     books_list_filter(bl.book)) avg_rating,
                     (title_sort(name)) AS sort
                FROM series;
CREATE VIEW tag_browser_filtered_tags AS SELECT
                    id,
                    name,
                    (SELECT COUNT(books_tags_link.id) FROM books_tags_link WHERE
                        tag=tags.id AND books_list_filter(book)) count,
                    (SELECT AVG(ratings.rating)
                     FROM books_tags_link AS tl, books_ratings_link AS bl, ratings
                     WHERE tl.tag=tags.id AND bl.book=tl.book AND
                     ratings.id = bl.rating AND ratings.rating <> 0 AND
                     books_list_filter(bl.book)) avg_rating,
                     name AS sort
                FROM tags;
CREATE VIEW tag_browser_publishers AS SELECT
                    id,
                    name,
                    (SELECT COUNT(id) FROM books_publishers_link WHERE publisher=publishers.id) count,
                    (SELECT AVG(ratings.rating)
                     FROM books_publishers_link AS tl, books_ratings_link AS bl, ratings
                     WHERE tl.publisher=publishers.id AND bl.book=tl.book AND
                     ratings.id = bl.rating AND ratings.rating <> 0) avg_rating,
                     name AS sort
                FROM publishers;
CREATE VIEW tag_browser_ratings AS SELECT
                    id,
                    rating,
                    (SELECT COUNT(id) FROM books_ratings_link WHERE rating=ratings.id) count,
                    (SELECT AVG(ratings.rating)
                     FROM books_ratings_link AS tl, books_ratings_link AS bl, ratings
                     WHERE tl.rating=ratings.id AND bl.book=tl.book AND
                     ratings.id = bl.rating AND ratings.rating <> 0) avg_rating,
                     rating AS sort
                FROM ratings;
CREATE VIEW tag_browser_series AS SELECT
                    id,
                    name,
                    (SELECT COUNT(id) FROM books_series_link WHERE series=series.id) count,
                    (SELECT AVG(ratings.rating)
                     FROM books_series_link AS tl, books_ratings_link AS bl, ratings
                     WHERE tl.series=series.id AND bl.book=tl.book AND
                     ratings.id = bl.rating AND ratings.rating <> 0) avg_rating,
                     (title_sort(name)) AS sort
                FROM series;
CREATE VIEW tag_browser_tags AS SELECT
                    id,
                    name,
                    (SELECT COUNT(id) FROM books_tags_link WHERE tag=tags.id) count,
                    (SELECT AVG(ratings.rating)
                     FROM books_tags_link AS tl, books_ratings_link AS bl, ratings
                     WHERE tl.tag=tags.id AND bl.book=tl.book AND
                     ratings.id = bl.rating AND ratings.rating <> 0) avg_rating,
                     name AS sort
                FROM tags;
CREATE INDEX authors_idx ON books (author_sort COLLATE NOCASE);
CREATE INDEX books_authors_link_aidx ON books_authors_link (author);
CREATE INDEX books_authors_link_bidx ON books_authors_link (book);
CREATE INDEX books_idx ON books (sort COLLATE NOCASE);
CREATE INDEX books_languages_link_aidx ON books_languages_link (lang_code);
CREATE INDEX books_languages_link_bidx ON books_languages_link (book);
CREATE INDEX books_publishers_link_aidx ON books_publishers_link (publisher);
CREATE INDEX books_publishers_link_bidx ON books_publishers_link (book);
CREATE INDEX books_ratings_link_aidx ON books_ratings_link (rating);
CREATE INDEX books_ratings_link_bidx ON books_ratings_link (book);
CREATE INDEX books_series_link_aidx ON books_series_link (series);
CREATE INDEX books_series_link_bidx ON books_series_link (book);
CREATE INDEX books_tags_link_aidx ON books_tags_link (tag);
CREATE INDEX books_tags_link_bidx ON books_tags_link (book);
CREATE INDEX comments_idx ON comments (book);
CREATE INDEX conversion_options_idx_a ON conversion_options (format COLLATE NOCASE);
CREATE INDEX conversion_options_idx_b ON conversion_options (book);
CREATE INDEX custom_columns_idx ON custom_columns (label);
CREATE INDEX data_idx ON data (book);
CREATE INDEX formats_idx ON data (format);
CREATE INDEX languages_idx ON languages (lang_code COLLATE NOCASE);
CREATE INDEX publishers_idx ON publishers (name COLLATE NOCASE);
CREATE INDEX series_idx ON series (name COLLATE NOCASE);
CREATE INDEX tags_idx ON tags (name COLLATE NOCASE);
CREATE TRIGGER books_delete_trg
            AFTER DELETE ON books
            BEGIN
                DELETE FROM books_authors_link WHERE book=OLD.id;
                DELETE FROM books_publishers_link WHERE book=OLD.id;
                DELETE FROM books_ratings_link WHERE book=OLD.id;
                DELETE FROM books_series_link WHERE book=OLD.id;
                DELETE FROM books_tags_link WHERE book=OLD.id;
                DELETE FROM books_languages_link WHERE book=OLD.id;
                DELETE FROM data WHERE book=OLD.id;
                DELETE FROM comments WHERE book=OLD.id;
                DELETE FROM conversion_options WHERE book=OLD.id;
                DELETE FROM books_plugin_data WHERE book=OLD.id;
                DELETE FROM identifiers WHERE book=OLD.id;
        END;
CREATE TRIGGER books_insert_trg AFTER INSERT ON books
        BEGIN
            UPDATE books SET sort=title_sort(NEW.title),uuid=uuid4() WHERE id=NEW.id;
        END;
CREATE TRIGGER books_update_trg
            AFTER UPDATE ON books
            BEGIN
            UPDATE books SET sort=title_sort(NEW.title)
                         WHERE id=NEW.id AND OLD.title <> NEW.title;
            END;
CREATE TRIGGER fkc_comments_insert
        BEFORE INSERT ON comments
        BEGIN
            SELECT CASE
                WHEN (SELECT id from books WHERE id=NEW.book) IS NULL
                THEN RAISE(ABORT, 'Foreign key violation: book not in books')
            END;
        END;
CREATE TRIGGER fkc_comments_update
        BEFORE UPDATE OF book ON comments
        BEGIN
            SELECT CASE
                WHEN (SELECT id from books WHERE id=NEW.book) IS NULL
                THEN RAISE(ABORT, 'Foreign key violation: book not in books')
            END;
        END;
CREATE TRIGGER fkc_data_insert
        BEFORE INSERT ON data
        BEGIN
            SELECT CASE
                WHEN (SELECT id from books WHERE id=NEW.book) IS NULL
                THEN RAISE(ABORT, 'Foreign key violation: book not in books')
            END;
        END;
CREATE TRIGGER fkc_data_update
        BEFORE UPDATE OF book ON data
        BEGIN
            SELECT CASE
                WHEN (SELECT id from books WHERE id=NEW.book) IS NULL
                THEN RAISE(ABORT, 'Foreign key violation: book not in books')
            END;
        END;
CREATE TRIGGER fkc_delete_on_authors
        BEFORE DELETE ON authors
        BEGIN
            SELECT CASE
                WHEN (SELECT COUNT(id) FROM books_authors_link WHERE author=OLD.id) > 0
                THEN RAISE(ABORT, 'Foreign key violation: authors is still referenced')
            END;
        END;
CREATE TRIGGER fkc_delete_on_languages
        BEFORE DELETE ON languages
        BEGIN
            SELECT CASE
                WHEN (SELECT COUNT(id) FROM books_languages_link WHERE lang_code=OLD.id) > 0
                THEN RAISE(ABORT, 'Foreign key violation: language is still referenced')
            END;
        END;
CREATE TRIGGER fkc_delete_on_languages_link
        BEFORE INSERT ON books_languages_link
        BEGIN
          SELECT CASE
              WHEN (SELECT id from books WHERE id=NEW.book) IS NULL
              THEN RAISE(ABORT, 'Foreign key violation: book not in books')
              WHEN (SELECT id from languages WHERE id=NEW.lang_code) IS NULL
              THEN RAISE(ABORT, 'Foreign key violation: lang_code not in languages')
          END;
        END;
CREATE TRIGGER fkc_delete_on_publishers
        BEFORE DELETE ON publishers
        BEGIN
            SELECT CASE
                WHEN (SELECT COUNT(id) FROM books_publishers_link WHERE publisher=OLD.id) > 0
                THEN RAISE(ABORT, 'Foreign key violation: publishers is still referenced')
            END;
        END;
CREATE TRIGGER fkc_delete_on_series
        BEFORE DELETE ON series
        BEGIN
            SELECT CASE
                WHEN (SELECT COUNT(id) FROM books_series_link WHERE series=OLD.id) > 0
                THEN RAISE(ABORT, 'Foreign key violation: series is still referenced')
            END;
        END;
CREATE TRIGGER fkc_delete_on_tags
        BEFORE DELETE ON tags
        BEGIN
            SELECT CASE
                WHEN (SELECT COUNT(id) FROM books_tags_link WHERE tag=OLD.id) > 0
                THEN RAISE(ABORT, 'Foreign key violation: tags is still referenced')
            END;
        END;
CREATE TRIGGER fkc_insert_books_authors_link
        BEFORE INSERT ON books_authors_link
        BEGIN
          SELECT CASE
              WHEN (SELECT id from books WHERE id=NEW.book) IS NULL
              THEN RAISE(ABORT, 'Foreign key violation: book not in books')
              WHEN (SELECT id from authors WHERE id=NEW.author) IS NULL
              THEN RAISE(ABORT, 'Foreign key violation: author not in authors')
          END;
        END;
CREATE TRIGGER fkc_insert_books_publishers_link
        BEFORE INSERT ON books_publishers_link
        BEGIN
          SELECT CASE
              WHEN (SELECT id from books WHERE id=NEW.book) IS NULL
              THEN RAISE(ABORT, 'Foreign key violation: book not in books')
              WHEN (SELECT id from publishers WHERE id=NEW.publisher) IS NULL
              THEN RAISE(ABORT, 'Foreign key violation: publisher not in publishers')
          END;
        END;
CREATE TRIGGER fkc_insert_books_ratings_link
        BEFORE INSERT ON books_ratings_link
        BEGIN
          SELECT CASE
              WHEN (SELECT id from books WHERE id=NEW.book) IS NULL
              THEN RAISE(ABORT, 'Foreign key violation: book not in books')
              WHEN (SELECT id from ratings WHERE id=NEW.rating) IS NULL
              THEN RAISE(ABORT, 'Foreign key violation: rating not in ratings')
          END;
        END;
CREATE TRIGGER fkc_insert_books_series_link
        BEFORE INSERT ON books_series_link
        BEGIN
          SELECT CASE
              WHEN (SELECT id from books WHERE id=NEW.book) IS NULL
              THEN RAISE(ABORT, 'Foreign key violation: book not in books')
              WHEN (SELECT id from series WHERE id=NEW.series) IS NULL
              THEN RAISE(ABORT, 'Foreign key violation: series not in series')
          END;
        END;
CREATE TRIGGER fkc_insert_books_tags_link
        BEFORE INSERT ON books_tags_link
        BEGIN
          SELECT CASE
              WHEN (SELECT id from books WHERE id=NEW.book) IS NULL
              THEN RAISE(ABORT, 'Foreign key violation: book not in books')
              WHEN (SELECT id from tags WHERE id=NEW.tag) IS NULL
              THEN RAISE(ABORT, 'Foreign key violation: tag not in tags')
          END;
        END;
CREATE TRIGGER fkc_update_books_authors_link_a
        BEFORE UPDATE OF book ON books_authors_link
        BEGIN
            SELECT CASE
                WHEN (SELECT id from books WHERE id=NEW.book) IS NULL
                THEN RAISE(ABORT, 'Foreign key violation: book not in books')
            END;
        END;
CREATE TRIGGER fkc_update_books_authors_link_b
        BEFORE UPDATE OF author ON books_authors_link
        BEGIN
            SELECT CASE
                WHEN (SELECT id from authors WHERE id=NEW.author) IS NULL
                THEN RAISE(ABORT, 'Foreign key violation: author not in authors')
            END;
        END;
CREATE TRIGGER fkc_update_books_languages_link_a
        BEFORE UPDATE OF book ON books_languages_link
        BEGIN
            SELECT CASE
                WHEN (SELECT id from books WHERE id=NEW.book) IS NULL
                THEN RAISE(ABORT, 'Foreign key violation: book not in books')
            END;
        END;
CREATE TRIGGER fkc_update_books_languages_link_b
        BEFORE UPDATE OF lang_code ON books_languages_link
        BEGIN
            SELECT CASE
                WHEN (SELECT id from languages WHERE id=NEW.lang_code) IS NULL
                THEN RAISE(ABORT, 'Foreign key violation: lang_code not in languages')
            END;
        END;
CREATE TRIGGER fkc_update_books_publishers_link_a
        BEFORE UPDATE OF book ON books_publishers_link
        BEGIN
            SELECT CASE
                WHEN (SELECT id from books WHERE id=NEW.book) IS NULL
                THEN RAISE(ABORT, 'Foreign key violation: book not in books')
            END;
        END;
CREATE TRIGGER fkc_update_books_publishers_link_b
        BEFORE UPDATE OF publisher ON books_publishers_link
        BEGIN
            SELECT CASE
                WHEN (SELECT id from publishers WHERE id=NEW.publisher) IS NULL
                THEN RAISE(ABORT, 'Foreign key violation: publisher not in publishers')
            END;
        END;
CREATE TRIGGER fkc_update_books_ratings_link_a
        BEFORE UPDATE OF book ON books_ratings_link
        BEGIN
            SELECT CASE
                WHEN (SELECT id from books WHERE id=NEW.book) IS NULL
                THEN RAISE(ABORT, 'Foreign key violation: book not in books')
            END;
        END;
CREATE TRIGGER fkc_update_books_ratings_link_b
        BEFORE UPDATE OF rating ON books_ratings_link
        BEGIN
            SELECT CASE
                WHEN (SELECT id from ratings WHERE id=NEW.rating) IS NULL
                THEN RAISE(ABORT, 'Foreign key violation: rating not in ratings')
            END;
        END;
CREATE TRIGGER fkc_update_books_series_link_a
        BEFORE UPDATE OF book ON books_series_link
        BEGIN
            SELECT CASE
                WHEN (SELECT id from books WHERE id=NEW.book) IS NULL
                THEN RAISE(ABORT, 'Foreign key violation: book not in books')
            END;
        END;
CREATE TRIGGER fkc_update_books_series_link_b
        BEFORE UPDATE OF series ON books_series_link
        BEGIN
            SELECT CASE
                WHEN (SELECT id from series WHERE id=NEW.series) IS NULL
                THEN RAISE(ABORT, 'Foreign key violation: series not in series')
            END;
        END;
CREATE TRIGGER fkc_update_books_tags_link_a
        BEFORE UPDATE OF book ON books_tags_link
        BEGIN
            SELECT CASE
                WHEN (SELECT id from books WHERE id=NEW.book) IS NULL
                THEN RAISE(ABORT, 'Foreign key violation: book not in books')
            END;
        END;
CREATE TRIGGER fkc_update_books_tags_link_b
        BEFORE UPDATE OF tag ON books_tags_link
        BEGIN
            SELECT CASE
                WHEN (SELECT id from tags WHERE id=NEW.tag) IS NULL
                THEN RAISE(ABORT, 'Foreign key violation: tag not in tags')
            END;
        END;
CREATE TRIGGER series_insert_trg
        AFTER INSERT ON series
        BEGIN
          UPDATE series SET sort=NEW.name WHERE id=NEW.id;
        END;
CREATE TRIGGER series_update_trg
        AFTER UPDATE ON series
        BEGIN
          UPDATE series SET sort=NEW.name WHERE id=NEW.id;
        END;
pragma user_version=20;