hanchu/data/schema.sql

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-- Enable foreign key support
PRAGMA foreign_keys = ON;
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PRAGMA journal_mode = WAL;
PRAGMA cache_size = -2000;
PRAGMA mmap_size = 30000000000;
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-- Words table
CREATE TABLE words (
id INTEGER PRIMARY KEY AUTOINCREMENT,
spelling TEXT NOT NULL,
ipa TEXT NOT NULL,
language_id INTEGER NOT NULL,
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frequency INTEGER,
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FOREIGN KEY (language_id) REFERENCES languages(id)
);
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CREATE INDEX idx_words_spelling ON words(spelling);
CREATE INDEX idx_words_language_id ON words(language_id);
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-- Languages table
CREATE TABLE languages (
id INTEGER PRIMARY KEY AUTOINCREMENT,
name TEXT NOT NULL
);
-- Parts of Speech table
CREATE TABLE parts_of_speech (
id INTEGER PRIMARY KEY AUTOINCREMENT,
name TEXT NOT NULL
);
-- Categories table (for noun and verb categories)
CREATE TABLE categories (
id INTEGER PRIMARY KEY AUTOINCREMENT,
name TEXT NOT NULL,
part_of_speech_id INTEGER NOT NULL,
FOREIGN KEY (part_of_speech_id) REFERENCES parts_of_speech(id)
);
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CREATE INDEX idx_categories_name ON categories(name);
CREATE INDEX idx_categories_part_of_speech_id ON categories(part_of_speech_id);
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-- Word Categories junction table
CREATE TABLE word_categories (
word_id INTEGER NOT NULL,
category_id INTEGER NOT NULL,
PRIMARY KEY (word_id, category_id),
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FOREIGN KEY (word_id) REFERENCES words(id),
FOREIGN KEY (category_id) REFERENCES categories(id)
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);
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CREATE INDEX idx_word_categories_category_id ON word_categories(category_id);
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-- Example data insertion
INSERT INTO languages (name) VALUES ('en-us');
INSERT INTO languages (name) VALUES ('th');
INSERT INTO languages (name) VALUES ('zh-cn');
INSERT INTO languages (name) VALUES ('zh-hk');
INSERT INTO languages (name) VALUES ('ja-jp');
INSERT INTO parts_of_speech (name) VALUES ('noun'), ('verb'), ('adjective'), ('adverb'), ('pronoun'), ('adposition'), ('conjunction');
INSERT INTO categories (name, part_of_speech_id) VALUES
('countable', 1),
('uncountable', 1),
('animate', 1),
('inanimate', 1),
('spatial', 1),
('temporal', 1),
('transitive', 2),
('intransitive', 2),
('action', 2),
('mental', 2),
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('auxiliar', 2),
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('preposition', 6),
('postposition', 6),
('circumposition', 6);
-- Example word insertion
INSERT INTO words (spelling, ipa, language_id) VALUES ('book', 'bʊk', 1);
-- Categorize 'book' as a countable, inanimate noun
INSERT INTO word_categories (word_id, category_id)
SELECT
(SELECT id FROM words WHERE spelling = 'book'),
id
FROM categories
WHERE name IN ('countable', 'inanimate');
-- Example verb insertion
INSERT INTO words (spelling, ipa, language_id) VALUES ('think','θɪŋk', 1);
-- Categorize 'think' as an intransitive, mental verb
INSERT INTO word_categories (word_id, category_id)
SELECT
(SELECT id FROM words WHERE spelling = 'think'),
id
FROM categories
WHERE name IN ('intransitive', 'mental');
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-- multi word stuff
CREATE TABLE idioms(
id INTEGER PRIMARY KEY AUTOINCREMENT,
text TEXT NOT NULL,
language_id INTEGER NOT NULL,
frequency INTEGER,
FOREIGN KEY (language_id) REFERENCES languages(id)
);
CREATE TABLE idioms_words(
idiom_id INTEGER NOT NULL,
word_id INTEGER NOT NULL,
PRIMARY KEY (idiom_id, word_id),
FOREIGN KEY (word_id) REFERENCES words(id),
FOREIGN KEY (idiom_id) REFERENCES idioms(id)
);
-- phrasal verbs, other sui generis stuff
CREATE TABLE expressions(
id INTEGER PRIMARY KEY AUTOINCREMENT,
text TEXT NOT NULL,
type TEXT NOT NULL, -- phrasal-verb, result-complement etc.
language_id INTEGER NOT NULL,
FOREIGN KEY (language_id) REFERENCES languages(id)
);
CREATE TABLE expression_words(
expression_id INTEGER NOT NULL,
word_id INTEGER NOT NULL,
PRIMARY KEY (expression_id, word_id),
FOREIGN KEY (expression_id) REFERENCES expressions(id),
FOREIGN KEY (word_id) REFERENCES words(id)
);
-- Progress
CREATE TABLE users(
id INTEGER PRIMARY KEY AUTOINCREMENT,
name TEXT NOT NULL,
creds TEXT NOT NULL
);
CREATE TABLE attempts(
id INTEGER PRIMARY KEY AUTOINCREMENT,
user_id INTEGER NOT NULL,
timestamp INTEGER NOT NULL,
resource_id INTEGER NOT NULL,
resources_type TEXT NOT NULL, -- name of the table, words, expressions, lessons etc.
good INTEGER NOT NULL, -- 0 or 1
FOREIGN KEY (user_id) REFERENCES users(id)
);
-- Index to query attempts on a specific resource
CREATE INDEX idx_attempts_resource ON attempts(resource_id, resources_type);
-- Index to query attempts for a specific user
CREATE INDEX idx_attempts_user ON attempts(user_id);
-- (Optional) Index to query attempts by user and resource (useful if you often query by both)
CREATE INDEX idx_attempts_user_resource ON attempts(user_id, resource_id, resources_type);
-- Lessons
CREATE TABLE lessons(
id INTEGER PRIMARY KEY AUTOINCREMENT,
text TEXT NOT NULL
);
CREATE TABLE lessons_resources(
resource_id INTEGER NOT NULL,
resources_type TEXT NOT NULL, -- name of the table, words, expressions etc.
lesson_id INTEGER NOT NULL,
FOREIGN KEY (lesson_id) REFERENCES lessons(id)
);