forked from bortzmeyer/GaBuZoMeu
86 lines
2.4 KiB
SQL
86 lines
2.4 KiB
SQL
-- Process with:
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-- sqlite lsr < create-db-subtag.sql
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DROP TABLE Descriptions_languages;
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DROP TABLE Descriptions_scripts;
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DROP TABLE Descriptions_regions;
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DROP TABLE Descriptions_variants;
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DROP TABLE Descriptions;
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DROP TABLE Prefixes;
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DROP TABLE Languages;
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DROP TABLE Extlangs;
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DROP TABLE Scripts;
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DROP TABLE Regions;
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DROP TABLE Variants;
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-- A few things to remember about SQLite:
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--
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-- 1) If you declare a column as "INTEGER PRIMARY KEY", it will
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-- autoincrement (http://www.sqlite.org/faq.html#q1)
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--
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-- 2) Types and constraints are almost always ignored
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-- (http://www.sqlite.org/datatype3.html or
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-- http://www.sqlite.org/faq.html#q2)
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CREATE TABLE Scripts (
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id INTEGER PRIMARY KEY NOT NULL,
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code TEXT UNIQUE NOT NULL,
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added DATE,
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comments TEXT);
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CREATE TABLE Languages (
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id INTEGER PRIMARY KEY NOT NULL,
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code TEXT UNIQUE NOT NULL,
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suppressscript TEXT REFERENCES Scripts(code),
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preferredvalue TEXT, -- Yes, it should REFERENCES Languages(code), but
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-- there is a chicken-and-egg problem.
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added DATE,
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comments TEXT);
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CREATE TABLE Extlangs (
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id SERIAL PRIMARY KEY NOT NULL,
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code TEXT UNIQUE NOT NULL, -- TODO: a length and content constraint?
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added DATE,
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prefix TEXT, -- references Languages(code)? Can a prefix be longer (a language and a script, for instance)?
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comments TEXT);
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CREATE TABLE Regions (
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id INTEGER PRIMARY KEY NOT NULL,
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code TEXT UNIQUE NOT NULL,
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added DATE,
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deprecated DATE,
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comments TEXT);
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CREATE TABLE Variants (
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id INTEGER PRIMARY KEY NOT NULL,
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code TEXT UNIQUE NOT NULL,
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added DATE,
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comments TEXT);
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CREATE TABLE Descriptions (
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id INTEGER NOT NULL PRIMARY KEY,
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description TEXT NOT NULL);
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CREATE TABLE Descriptions_Languages (
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description INTEGER NOT NULL REFERENCES Descriptions(id),
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lang TEXT NOT NULL REFERENCES Languages(code));
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CREATE TABLE Descriptions_Scripts (
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description INTEGER NOT NULL REFERENCES Descriptions(id),
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script TEXT NOT NULL REFERENCES Scripts(code));
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CREATE TABLE Descriptions_Variants (
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description INTEGER NOT NULL REFERENCES Descriptions(id),
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variant TEXT NOT NULL REFERENCES Variants(code));
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CREATE TABLE Descriptions_Regions (
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description INTEGER NOT NULL REFERENCES Descriptions(id),
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region TEXT NOT NULL REFERENCES Regions(code));
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CREATE TABLE Prefixes (
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variant TEXT NOT NULL REFERENCES Variants(code),
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prefix TEXT NOT NULL REFERENCES Languages(code)
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);
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