yiguolei commented on code in PR #15718:
URL: https://github.com/apache/doris/pull/15718#discussion_r1064269057
##########
be/src/vec/exec/vschema_scan_node.cpp:
##########
@@ -258,73 +262,112 @@ Status VSchemaScanNode::get_next(RuntimeState* state,
vectorized::Block* block,
std::vector<vectorized::MutableColumnPtr> columns(_slot_num);
bool schema_eos = false;
- do {
- bool mem_reuse = block->mem_reuse();
- DCHECK(block->rows() == 0);
+ if (_schema_scanner->type() == TSchemaTableType::SCH_TABLES) {
+ do {
+ bool mem_reuse = block->mem_reuse();
Review Comment:
do not use mem reuse here, just call block->clear() to clear all columns in
block and then reinsert columns.
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