Mryange opened a new pull request, #58578:
URL: https://github.com/apache/doris/pull/58578
### What problem does this PR solve?
Previously, when executing an expr we relied on block.rows() to determine
the number of rows to return. That required guaranteeing the block was not
empty and that the first column (since block.rows() is implemented from it) had
the final desired row count. Now we pass a count parameter to indicate the size
each expr should return for its Column.
before
```C++
vectorized::Block tmp_block;
tmp_block.insert({vectorized::ColumnUInt8::create(1),
std::make_shared<vectorized::DataTypeUInt8>(),
""});
RETURN_IF_ERROR(_const_expr_lists[_const_expr_list_idx][i]->execute(&tmp_block,
&result_list[i]));
```
now
```C++
RETURN_IF_ERROR(_const_expr_lists[_const_expr_list_idx][i]->execute_const_expr(
tmp_block_columns[i]));
Status VExprContext::execute_const_expr(ColumnWithTypeAndName& result) {
Status st;
RETURN_IF_CATCH_EXCEPTION({ st = _root->execute_column(this, nullptr, 1,
result.column); });
```
### Release note
None
### Check List (For Author)
- Test <!-- At least one of them must be included. -->
- [ ] Regression test
- [ ] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
- [ ] Previous test can cover this change.
- [ ] No code files have been changed.
- [ ] Other reason <!-- Add your reason? -->
- Behavior changed:
- [ ] No.
- [ ] Yes. <!-- Explain the behavior change -->
- Does this need documentation?
- [ ] No.
- [ ] Yes. <!-- Add document PR link here. eg:
https://github.com/apache/doris-website/pull/1214 -->
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label <!-- Add branch pick label that this PR should
merge into -->
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