Mryange opened a new pull request, #32733:
URL: https://github.com/apache/doris/pull/32733
## Proposed changes
In the StatefulOperator, there is code like this:
```
Status NestLoopJoinProbeOperator::prepare(doris::RuntimeState* state) {
// just for speed up, the way is dangerous
_child_block = _node->get_left_block();
return StatefulOperator::prepare(state);
}
```
This will lead to a failure in the check because both _origin_block in the
exec node of the old pipeline and _child_block in the StatefulOperator will
simultaneously hold the same column.
Here's the modification: previously, we would clear _origin_block and then
pull, but here we are switching to pulling first and then clearing
_origin_block.
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