starocean999 03aef7a8ac [fix](nereids) sender in union's child fragment has no destination (#15402) ...

1. always create an exchange node for set operation node's children
2. fix cast expr's nullability bug.

2022-12-27 22:36:54 +08:00

..

test_union.out

[fix](nereids) sender in union's child fragment has no destination (#15402)

2022-12-27 22:36:54 +08:00