+CREATE TABLE login (
+ username text NOT NULL UNIQUE,
+ pass text,
+ email text,
+ fullname text,
+ editlang text[],
+ id serial NOT NULL PRIMARY KEY
+);
+
CREATE TABLE word (
form text NOT NULL,
+ alt text[],
+ lang text NOT NULL DEFAULT 'en',
cat integer REFERENCES word (id),
+ ref integer REFERENCES word (id),
+ prio smallint NOT NULL DEFAULT '1',
+ grade integer,
+ cover boolean NOT NULL DEFAULT FALSE,
source text,
thumb text[],
+ wptitle text,
created timestamptz DEFAULT now(),
+ creator integer REFERENCES login (id),
+ updated timestamptz,
id serial NOT NULL PRIMARY KEY
);
COMMENT ON COLUMN word.form IS 'preferred textual representation';
+COMMENT ON COLUMN word.alt IS 'alternate forms with equivalent meaning';
+COMMENT ON COLUMN word.lang IS 'ISO 639 language code matching wikipedia subdomain';
COMMENT ON COLUMN word.cat IS 'hierarchical classification';
+COMMENT ON COLUMN word.ref IS 'reference to equivalent en translation';
+COMMENT ON COLUMN word.prio IS 'difficulty level or importance; lower values have precedence';
+COMMENT ON COLUMN word.grade IS 'ascending hierarchical order, preceding default alphabetical';
+COMMENT ON COLUMN word.cover IS 'highlight if selected';
COMMENT ON COLUMN word.source IS 'URI of downloaded image';
COMMENT ON COLUMN word.thumb IS 'ImageMagick convert options to create thumbnail from source image';
+COMMENT ON COLUMN word.wptitle IS 'reference Wikipedia article';
+COMMENT ON COLUMN word.updated IS 'last significant change';
+COMMENT ON COLUMN word.creator IS 'user responsible for initial submit';
+
+CREATE OR REPLACE FUNCTION exportform(word) RETURNS text AS $$
+ SELECT concat(
+ $1.prio || CASE WHEN $1.cover THEN 'c' ELSE '' END || ':',
+ array_to_string($1.form || $1.alt, '/')
+ );
+$$ LANGUAGE SQL IMMUTABLE;
+
+CREATE OR REPLACE VIEW _cat_words AS
+ SELECT exportform(word.*) form, sub.*, word.lang, word.ref
+ FROM word RIGHT JOIN (
+ SELECT cat id, array_agg(exportform(word.*) ORDER BY grade, form) forms
+ FROM word WHERE ref IS NULL GROUP BY cat
+ ) sub USING (id);