starocean999 commented on code in PR #17315:
URL: https://github.com/apache/doris/pull/17315#discussion_r1122589837
##########
be/src/vec/aggregate_functions/aggregate_function_window.h:
##########
@@ -274,6 +274,8 @@ struct LeadLagData {
const auto* nullable_column = assert_cast<const
ColumnNullable*>(column);
if (nullable_column->is_null_at(0)) {
_default_value.reset();
+ } else {
+
_default_value.set_value(nullable_column->get_nested_column_ptr(), 0);
Review Comment:
new nereids planner may add a cast to literal string internally like:
`select id, create_time, lead(create_time, 1, '2022-09-06 00:00:00') over
(order by create_time desc) as "prev_time" from
test1; `
->
`select id, create_time, lead(create_time, 1, cast('2022-09-06 00:00:00' as
datetime)) over
(order by create_time desc) as "prev_time" from
test1; `
so, the above code is added for compatibility of nereids planner
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