54 lines
2.5 KiB
SQL
54 lines
2.5 KiB
SQL
-- Divan PostgreSQL schema. Ids and URLs come from divan-data (stable across syncs).
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-- Search: poems.search_text holds Urdu-normalised text (see api/src/urdu.ts); the pg_trgm
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-- index makes substring search (ILIKE '%word%') fast without a language dictionary.
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CREATE EXTENSION IF NOT EXISTS pg_trgm;
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CREATE TABLE IF NOT EXISTS poets (
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id integer PRIMARY KEY,
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url text NOT NULL UNIQUE, -- '/p238'
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name text NOT NULL,
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nickname text NOT NULL,
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description text, -- short intro (Urdu Wikipedia lead)
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birth_year_ah integer, -- Hijri, approximate
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death_year_ah integer,
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pin_order integer -- featured on the home page (db/featured.sql)
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);
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ALTER TABLE poets ADD COLUMN IF NOT EXISTS pin_order integer;
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ALTER TABLE poets ADD COLUMN IF NOT EXISTS birth_year_ce integer; -- Gregorian (عیسوی)
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ALTER TABLE poets ADD COLUMN IF NOT EXISTS death_year_ce integer;
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CREATE TABLE IF NOT EXISTS categories (
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id integer PRIMARY KEY,
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poet_id integer NOT NULL REFERENCES poets(id) ON DELETE CASCADE,
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parent_id integer REFERENCES categories(id) ON DELETE CASCADE, -- NULL = the poet's root
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url text NOT NULL UNIQUE, -- '/p238/shaeri/c641'
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title text NOT NULL,
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position integer NOT NULL DEFAULT 0
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);
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CREATE INDEX IF NOT EXISTS categories_parent ON categories(parent_id);
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CREATE INDEX IF NOT EXISTS categories_poet ON categories(poet_id);
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CREATE TABLE IF NOT EXISTS poems (
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id integer PRIMARY KEY,
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category_id integer NOT NULL REFERENCES categories(id) ON DELETE CASCADE,
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poet_id integer NOT NULL REFERENCES poets(id) ON DELETE CASCADE,
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url text NOT NULL UNIQUE, -- '/p238/shaeri/c641/sh6556'
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title text NOT NULL,
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full_title text NOT NULL,
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source_url text, -- Wikisource page
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position integer NOT NULL DEFAULT 0,
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search_text text NOT NULL DEFAULT '' -- normalised title + verses
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);
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CREATE INDEX IF NOT EXISTS poems_category ON poems(category_id);
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CREATE INDEX IF NOT EXISTS poems_search ON poems USING gin (search_text gin_trgm_ops);
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CREATE TABLE IF NOT EXISTS verses (
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poem_id integer NOT NULL REFERENCES poems(id) ON DELETE CASCADE,
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vorder integer NOT NULL,
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position text NOT NULL, -- Right | Left | Single | Paragraph
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couplet integer NOT NULL,
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text text NOT NULL,
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PRIMARY KEY (poem_id, vorder)
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);
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