\set ECHO none
add_provenance

(1 row)
remove_provenance

(1 row)
x|speed
1|6
2|5
(2 rows)
self_pairs
0
(1 row)
remove_provenance

(1 row)
x|speed
1|6
1|2
2|5
(3 rows)
self_pairs|divided_by_zero_is_null
3|t
(1 row)
remove_provenance

(1 row)
x|undefined
1|
2|
3|
(3 rows)
remove_provenance

(1 row)