JoverZhang commented on code in PR #55940:
URL: https://github.com/apache/doris/pull/55940#discussion_r2343933333
##########
regression-test/data/query_p0/aggregate/support_type/regr_slope/regr_slope.out:
##########
@@ -6,17 +6,17 @@
1.0
-- !regr_slope_int --
--0.0
+1.0
Review Comment:
### Verification
PostgreSQL
```sql
select regr_slope(col_int, col_bigint) from d_table;
+------------+
| regr_slope |
|------------|
| 1.0 |
+------------+
select covar_pop(col_bigint, col_int) / var_pop(col_bigint) from d_table;
+----------+
| ?column? |
|----------|
| 1.0 |
+----------+
```
Clickhouse (stable covariance/variance)
```sql
SELECT covarPopStable(col_bigint, col_int) / varPopStable(col_bigint)
FROM d_table
┌─divide(covar⋯ol_bigint))─┐
1. │ 1 │
└──────────────────────────┘
```
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