102 lines
2.8 KiB
MySQL
102 lines
2.8 KiB
MySQL
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DROP TABLE IF EXISTS notes;
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DROP TABLE IF EXISTS note_relationships;
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DROP TABLE IF EXISTS pages;
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DROP TABLE IF EXISTS page_relationships;
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DROP TABLE IF EXISTS favorites;
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CREATE TABLE notes (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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uuid TEXT NOT NULL UNIQUE,
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notetype TEXT
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);
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CREATE TABLE pages (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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slug text NOT NULL UNIQUE,
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note_id INTEGER,
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FOREIGN KEY (note_id) REFERENCES notes (id) ON DELETE NO ACTION ON UPDATE NO ACTION
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);
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CREATE TABLE note_relationships (
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note_id INTEGER NOT NULL,
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parent_id INTEGER NOT NULL,
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position INTEGER NOT NULL,
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nature TEXT NOT NULL,
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FOREIGN KEY (note_id) REFERENCES notes (id) ON DELETE NO ACTION ON UPDATE NO ACTION,
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FOREIGN KEY (parent_id) REFERENCES notes (id) ON DELETE NO ACTION ON UPDATE NO ACTION
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);
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CREATE TABLE page_relationships (
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note_id INTEGER NOT NULL,
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page_id INTEGER NOT NULL,
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FOREIGN KEY (note_id) references notes (id) ON DELETE NO ACTION ON UPDATE NO ACTION,
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FOREIGN KEY (page_id) references pages (id) ON DELETE NO ACTION ON UPDATE NO ACTION
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);
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INSERT INTO notes (id, uuid, notetype) VALUES
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(1, "U1", "root"),
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(2, "U2", "note"),
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(3, "U3", "note"),
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(4, "U4", "note"),
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(5, "U5", "note"),
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(6, "U6", "note"),
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(7, "U7", "note"),
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(8, "U8", "note");
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INSERT INTO note_relationships (note_id, parent_id, position, nature) VALUES
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(2, 1, 1, "note"),
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(3, 1, 2, "note"),
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(4, 3, 1, "note"),
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(5, 3, 2, "note"),
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(6, 5, 1, "note"),
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(7, 4, 1, "note"),
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(8, 7, 1, "note");
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SELECT id, uuid, parent_id, parent_uuid, notetype
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FROM (
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WITH RECURSIVE parents (
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id, uuid, parent_id, parent_uuid, notetype, cycle
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)
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AS (
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SELECT notes.id, notes.uuid,
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note_parents.id,
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note_parents.uuid,
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notes.notetype,
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','||notes.id||','
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FROM notes
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INNER JOIN note_relationships
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ON notes.id = note_relationships.note_id
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AND notes.notetype = 'note'
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INNER JOIN notes as note_parents
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ON note_parents.id = note_relationships.parent_id
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WHERE notes.id = 4
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UNION
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SELECT DISTINCT notes.id,
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notes.uuid,
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next_parent.id,
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next_parent.uuid,
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notes.notetype,
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parents.cycle||notes.id||','
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FROM notes
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INNER JOIN parents
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ON parents.parent_id = notes.id
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LEFT JOIN note_relationships
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ON note_relationships.note_id = notes.id
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LEFT JOIN notes as next_parent
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ON next_parent.id = note_relationships.parent_id
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WHERE parents.cycle NOT LIKE '%,'||notes.id||',%'
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)
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SELECT * FROM parents);
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-- Possible outcomes epending on the 'WHERE notes.id' clause in the root SELECT (first value is passed in):
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-- 8, 7, 4, 3, 1
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-- 6, 5, 3, 1
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-- 2, 1
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-- 4, 3, 1
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-- 1 should result in no return (root notes aren't returned by themselves; they exist only so that
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-- valid note reversals can find their parent page objects.
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