mirror of
https://github.com/johrpan/musicus_mobile.git
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4b178752b9
Before works where stored using a complicated tree structure where each part references its parent. Now it's a flat structure that keeps track of the relations using a new field named part_level. The corresponding query was simplified accordingly. Also, the updateWork function was rewritten.
52 lines
1.4 KiB
Text
52 lines
1.4 KiB
Text
CREATE TABLE persons (
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id INTEGER NOT NULL PRIMARY KEY,
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first_name TEXT NOT NULL,
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last_name TEXT NOT NULL
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);
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CREATE TABLE instruments (
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id INTEGER NOT NULL PRIMARY KEY,
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name TEXT NOT NULL
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);
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CREATE TABLE works (
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id INTEGER NOT NULL PRIMARY KEY,
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composer INTEGER REFERENCES persons(id),
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title TEXT NOT NULL,
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part_of INTEGER REFERENCES works(id) ON DELETE CASCADE,
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part_index INTEGER,
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part_level INTEGER
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);
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CREATE TABLE instrumentations (
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work INTEGER NOT NULL REFERENCES works(id) ON DELETE CASCADE,
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instrument INTEGER NOT NULL REFERENCES instruments(id) ON DELETE CASCADE
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);
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allPersons:
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SELECT * FROM persons ORDER BY last_name;
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personById:
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SELECT * FROM persons WHERE id = :id LIMIT 1;
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allInstruments:
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SELECT * FROM instruments ORDER BY name;
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instrumentById:
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SELECT * FROM instruments WHERE id = :id LIMIT 1;
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workById:
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SELECT * FROM works WHERE id = :id LIMIT 1;
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workParts:
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SELECT * FROM works WHERE part_of = :id ORDER BY part_index;
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-- TODO: Uncomment this once https://github.com/simolus3/moor/issues/453 is fixed.
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-- worksByComposer(:id AS INTEGER):
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-- SELECT DISTINCT A.* FROM works A, works B ON A.id = B.part_of
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-- WHERE A.composer = :id OR B.composer = :id;
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instrumentsByWork:
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SELECT instruments.* FROM instrumentations
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JOIN instruments ON instrumentations.instrument=instruments.id
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WHERE instrumentations.work = :workId;
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