Dependent commit queue for a database
A database comprises a database interface and a database updater. The database interface receives a first set of information and a second set of information to be updated in the database. The database updater updates a second set of information in the database based at least in part on a condition that a first set of information in the database has been previously updated.
1. A database, comprising:
an interface configured to:
receive an indication to start a first process and a second process; and a processor configured to:
read a first value for an element A for the first process;
read the first value for the element A for the second process;
calculate a first new value A 1 based on the first value for the element A for the first process;
update the first value for the element A to the first new value in the event that the first value for the element A meets a first boundary condition;
calculate a second new value A 2 based on the first value for the element A for the second process; and
update an actual value for the element A to the second new value in the event that the actual value for the element A meets a second boundary condition, wherein the actual value for the element A has been updated from the first value for the element A to the first new value A 1 by the first process.
2. The database of claim 1 , wherein the first boundary condition is calculated based on the first value for the element A.
3. The database of claim 1 , wherein the first boundary condition comprises a first lower bound.
4. The database of claim 1 , wherein the first boundary condition comprises a first upper bound.
5. The database of claim 1 , wherein the second boundary condition is calculated based on the first value for the element A.
6. The database of claim 1 , wherein the second boundary condition comprises a second lower bound.
7. The database of claim 1 , wherein the second boundary condition comprises a second upper bound.
8. The database of claim 1 , wherein in the event that the first value for the element A does not meet the first boundary condition, the update of the first value for the element A is aborted.
9. The database of claim 1 , wherein in the event that the actual value for the element A does not meet the second boundary condition, the update of the actual value for the element A is aborted.
10. A method for a database, comprising:
receiving an indication to start a first process and a second process; and
reading a first value for the element A for the first process;
reading the first value for the element A for the second process;
calculating, using a processor, a first new value A 1 based on the first value for the element A for the first process;
updating the first value for the element A to the first new value in the event that the first value for the element A meets a first boundary condition;
calculating a second new value A 2 based on the first value for the element A for the second process; and
updating an actual value for the element A to the second new value in the event that the actual value for the element A meets a second boundary condition, wherein the actual value for the element A has been updated from the first value for the element A to the first new value A 1 by the first process.
11. The method of claim 10 , wherein the first boundary condition is calculated based on the first value for the element A.
12. The method of claim 10 , wherein the first boundary condition comprises a first lower bound.
13. The method of claim 10 , wherein the first boundary condition comprises a first upper bound.
14. The method of claim 10 , wherein the second boundary condition is calculated based on the first value for the element A.
15. The method of claim 10 , wherein the second boundary condition comprises a second lower bound.
16. The method of claim 10 , wherein the second boundary condition comprises a second upper bound.
17. The method of claim 10 , wherein in the event that the first value for the element A does not meet the first boundary condition, the update of the first value for the element A is aborted.
18. The method of claim 10 , wherein in the event that the actual value for the element A does not meet the second boundary condition, the update of the actual value for the element A is aborted.
19. A computer program product for a database, the computer program product being embodied in a non-transitory computer readable storage medium and comprising computer instructions for:
receiving an indication to start a first process and a second process; and
reading a first value for the element A for the first process;
reading the first value for the element A for the second process;
calculating, using a processor, a first new value A 1 based on the first value for the element A for the first process;
updating the first value for the element A to the first new value in the event that the first value for the element A meets a first boundary condition;
calculating a second new value A 2 based on the first value for the element A for the second process; and
updating an actual value for the element A to the second new value in the event that the actual value for the element A meets a second boundary condition, wherein the actual value for the element A has been updated from the first value for the element A to the first new value A 1 by the first process.