user
67 lines
1.7 KiB
Go
Executable File
67 lines
1.7 KiB
Go
Executable File
package schema
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import (
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"github.com/jmoiron/sqlx"
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)
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type schema struct {
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create string
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drop string
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}
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func MustCreate(db *sqlx.DB) {
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db.MustExec(defaultSchema.create)
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}
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func MustDrop(db *sqlx.DB) {
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db.MustExec(defaultSchema.drop)
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}
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// Type time_reserve stores the reserve time reserve by time
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// Type TIME(0) has minimal accuracy, counts down by seconds
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// Type SMALLDATETIME has format'YYYYMMDD hh:mm', for example '20090212 12:30', counts down by minuts
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var defaultSchema = schema{
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create: `
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CREATE TABLE IF NOT EXISTS Tables (
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id INTEGER
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CONSTRAINT PK_Tables PRIMARY KEY AUTOINCREMENT,
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name INTEGER NOT NULL UNIQUE,
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max_people INTEGER NOT NULL,
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room TEXT NOT NULL,
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CONSTRAINT CHK_max_people CHECK (
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max_people > 0
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AND max_people < 11
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)
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);
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CREATE TABLE IF NOT EXISTS Bookings (
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id INTEGER
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CONSTRAINT PK_Bookings PRIMARY KEY AUTOINCREMENT,
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id_tables INTEGER,
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reservation TEXT NOT NULL,
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time_reserve TEXT NOT NULL,
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who_booked TEXT NOT NULL,
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CONSTRAINT FK_Bookings_Tables FOREIGN KEY (id_tables) REFERENCES Tables (id),
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CONSTRAINT CHK_min_max_time_reserve CHECK (time_reserve BETWEEN "00:30" AND "12:00")
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);
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CREATE TRIGGER IF NOT EXISTS CHK_Bookings_Insert
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BEFORE INSERT ON Bookings
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BEGIN
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SELECT RAISE(
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FAIL,
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"Reservation of table is not possible due to the existing reservation"
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)
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FROM (
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SELECT
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datetime(NEW.reservation) AS new_res_dt,
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datetime(reservation) AS res_dt,
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datetime(reservation, time_reserve) AS reserved_until,
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id_tables
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FROM Bookings
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)
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WHERE
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(new_res_dt >= res_dt AND new_res_dt < reserved_until)
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AND id_tables = NEW.id_tables;
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END;
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`,
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}
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