cambyzju commented on code in PR #9612:
URL: https://github.com/apache/incubator-doris/pull/9612#discussion_r874566823
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be/src/vec/exec/vschema_scan_node.cpp:
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@@ -69,12 +69,14 @@ Status VSchemaScanNode::get_next(RuntimeState* state,
vectorized::Block* block,
if (!_is_init) return Status::InternalError("used before initialize.");
RETURN_IF_ERROR(exec_debug_action(TExecNodePhase::GETNEXT));
RETURN_IF_CANCELLED(state);
- bool mem_reuse = block->mem_reuse();
- DCHECK(block->rows() == 0);
std::vector<vectorized::MutableColumnPtr> columns(_slot_num);
bool schema_eos = false;
do {
+ bool mem_reuse = block->mem_reuse();
Review Comment:
Now there are no filter inside do-while loop in mysql and odbc scan node, we
will never go to next loop with block->rows==0.
For feature plan, I think we should better refractor mem_resue to reduce the
risk of incorrectly using.
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