Add available bookings scripts and results

sql/add_valid_booking.sql

@@ -0,0 +1,30 @@
+-- available bookings - task 3
+-- changes:
+--   changed BookingDate (Reserved) data type from date to datetime, because I assumed that Little Lemon
+--   allows wants bookings per day and table - a table is considered blocked for 2 hours
+--   added CustomerID and EmployeeID input parameters
+-- noqa: disable=CP03,LT02,RF03
+--
+create procedure AddValidBooking (
+    in Reserved datetime, in TableNumber int, in CustomerID int, in EmployeeID int
+)
+begin
+    start transaction;
+
+    if TableIsFree(Reserved, TableNumber) then
+        insert into Bookings (Reserved, TableNumber, CustomerID, EmployeeID) values (
+            Reserved, TableNumber, CustomerID, EmployeeID
+        );
+        commit;
+        select concat(
+            "Table ", TableNumber,
+            " was free - booking accepted (BookingID=", (select last_insert_id()), ')'
+        ) as BookingStatus;
+    else
+        rollback;
+        select concat(
+            "Table ", TableNumber,
+            " is already booked - booking cancelled"
+        ) as BookingStatus;
+    end if;
+end