HappenLee commented on code in PR #17973:
URL: https://github.com/apache/doris/pull/17973#discussion_r1142379729
##########
be/src/vec/exprs/table_function/vexplode_numbers.cpp:
##########
@@ -35,7 +37,15 @@ Status
VExplodeNumbersTableFunction::process_init(vectorized::Block* block) {
RETURN_IF_ERROR(_vexpr_context->root()->children()[0]->execute(_vexpr_context,
block,
&value_column_idx));
_value_column = block->get_by_position(value_column_idx).column;
-
+ if (is_column_const(*_value_column)) {
+ int value = *reinterpret_cast<const
int*>(_value_column->get_data_at(0).data);
+ if (value <= block->rows()) { // use const optimize
+ _is_const = true;
+ for (int i = 1; i <= value; i++) {
+ ((ColumnInt32*)_elements_column.get())->insert_value(i);
Review Comment:
better resize and call std::iota or std::generate to do the work
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