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Update backend_database_specification.md

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Stephen Seo 2022-03-21 13:25:32 +09:00
parent 6c47ce948b
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backend_database_specification.md
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@ -24,13 +24,13 @@ CREATE TABLE players (id INTEGER PRIMARY KEY NOT NULL,
// "3" for magenta won, "4" for draw. // "3" for magenta won, "4" for draw.
CREATE TABLE games (id INTEGER PRIMARY KEY NOT NULL, CREATE TABLE games (id INTEGER PRIMARY KEY NOT NULL,
cyan_player INTEGER UNIQUE NOT NULL, cyan_player INTEGER UNIQUE,
magenta_player INTEGER UNIQUE NOT NULL, magenta_player INTEGER UNIQUE,
date_changed TEXT NOT NULL, date_changed TEXT NOT NULL,
board TEXT NOT NULL, board TEXT NOT NULL,
status INTEGER NOT NULL, status INTEGER NOT NULL,
FOREIGN KEY(cyan_player) REFERENCES players (id), FOREIGN KEY(cyan_player) REFERENCES players (id) ON DELETE SET NULL,
FOREIGN KEY(magenta_player) REFERENCES players (id)); FOREIGN KEY(magenta_player) REFERENCES players (id) ON DELETE SET NULL);
``` ```
"date" entries are used for garbage collection of the database. A predefined "date" entries are used for garbage collection of the database. A predefined