Test Suite for the Execution Engine

Query:
1. Query with 0 answer objects.
2. Query with 1 answer objects.
3. Query with many (>1) answer objects.
4. Query with 1 level nested answer objects.
5. Query with 2 level nested answer objects.
6. Query with many (3) level nested answer objects.

Extract:

1. Extract with 0 conditions.
2. Extract with 1 condition.
3. Extract with many (>1) conditions.
4. Extract with 1 level nested condition.
5. Extract with many (2) level nested condition.
6. Extract with CONSTANT oid.
7. Extract with VARIABLE oid.
8. Extract with CONSTANT label.
9. Extract with VARIABLE label.
10. Extract with CONSTANT atomic value.
11. Extract with VARIABLE atomic value.
12. Extract with set value. (same as 5)
13. Extract with variables repeating in a single condition.
14. Extract with variables repeating in many (>1) conditions.
15. Extract with many (>1) (sub)conditions matching to same object.

Construct:

1. Construct with 1 level nested template.
2. Construct with many (2) level nested template.
3. Construct with CONSTANT oid.
4. Construct with VARIABLE oid.
5. Construct with "head with 0 args" oid.
6. Construct with "head with 1 arg" oid.
7. Construct with "head with many (>1) args" oid.
8. Construct with "head with a VARIABLE arg" oid.
9. Construct with "head with a CONSTANT arg" oid.
10. Construct with "head with a term arg" oid.
11. Construct with CONSTANT label.
12. Construct with VARIABLE label.
13. Construct with "head with 0 args" label.
14. Construct with "head with 1 arg" label.
15. Construct with "head with many (>1) args" label.
16. Construct with "head with a VARIABLE arg" label.
17. Construct with "head with a CONSTANT arg" label.
18. Construct with "head with a term arg" label.
19. Construct with CONSTANT atomic value.
20. Construct with VARIABLE atomic value.
21. Construct with "head with 0 args" value.
22. Construct with "head with 1 arg" value.
23. Construct with "head with many (>1) args" value.
24. Construct with "head with a VARIABLE arg" value.
25. Construct with "head with a CONSTANT arg" value.
26. Construct with "head with a term arg" value.
27. Construct with set value. (same as 2)
28. Construct with existing oid (object fusion).
29. Construct with NULL oid.

Union:

1. Union with left table having 0 tuples.
2. Union with right table having 0 tuples.
3. Union with left table having 1 tuple.
4. Union with right table having 1 tuple.
5. Union with left table having many (>1) tuples.
6. Union with right table having many (>1) tuples.

Join:

1. Join with left table having 0 tuples.
2. Join with right table having 0 tuples.
3. Join with left table having 1 tuple.
4. Join with right table having 1 tuple.
5. Join with left table having many (>1) tuples.
6. Join with right table having many (>1) tuples.
7. Join with 0 join variables.
8. Join with 1 join variable.
9. Join with many (>1) join variables.
10. Join with join variables forming a key for left table.
11. Join with join variables forming a key for right table.
12. Join with join variables forming a key for both tables.
13. Join with join variables not a key for either tables.
14. Join with left table having 0 non-join variables.
15. Join with left table having 1 non-join variable.
16. Join with left table having many (>1) non-join variables.
17. Join with right table having 0 non-join variables.
18. Join with right table having 1 non-join variable.
19. Join with right table having many (>1) non-join variables.

SortJoin:

1. SortJoin with left table having 0 tuples.
2. SortJoin with right table having 0 tuples.
3. SortJoin with left table having 1 tuple.
4. SortJoin with right table having 1 tuple.
5. SortJoin with left table having many (>1) tuples.
6. SortJoin with right table having many (>1) tuples.
7. SortJoin with 0 join variables.
8. SortJoin with 1 join variable.
9. SortJoin with many (>1) join variables.
10. SortJoin with join variables forming a key for left table.
11. SortJoin with join variables forming a key for right table.
12. SortJoin with join variables forming a key for both tables.
13. SortJoin with join variables not a key for either tables.
14. SortJoin with one of the tables having sorted tuples.
15. SortJoin with one of the tables having tuples in reverse order.
16. SortJoin with left table having 0 non-join variables.
17. SortJoin with left table having 1 non-join variable.
18. SortJoin with left table having many (>1) non-join variables.
19. SortJoin with right table having 0 non-join variables.
20. SortJoin with right table having 1 non-join variable.
21. SortJoin with right table having many (>1) non-join variables.

Project:

1. Project 0 variables of a table.
2. Project 1 variable of a table.
3. Project a subset (>1) variables of a table.
4. Project all variables of a table.

Filter:

1. (1) Filter on "=" of a string variable.
2. (2) Filter on "<" of a string variable.
3. (3) Filter on ">" of a string variable.
4. (4) Filter on "<=" of a string variable.
5. (5) Filter on ">=" of a string variable.
6. (6) Filter on "!=" of a string variable.
7. (7) Filter on "=" of an int variable.
8. (8) Filter on "<" of an int variable.
9. (9) Filter on ">" of an int variable.
10. (10) Filter on "<=" of an int variable.
11. (11) Filter on ">=" of an int variable.
12. (12) Filter on "!=" of an int variable.