spi-stats:fix to group unnest Incomplete statistics.

ideal-world · Jul 4, 2024 · b5d4e71 · b5d4e71
1 parent 0dbc9be
commit b5d4e71
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/backend/spi/spi-stats/src/stats_enumeration.rs b/backend/spi/spi-stats/src/stats_enumeration.rs
@@ -296,7 +296,7 @@ impl StatsDataTypeKind {
 
     pub(crate) fn to_pg_group(&self, column_name: &str, multi_values: bool, time_window_fun: &Option<StatsQueryTimeWindowKind>) -> Option<String> {
         if multi_values {
-            Some(format!("unnest({})", column_name))
+            Some(format!("unnest(array_append({},''))", column_name))
         } else if let Some(time_window_fun) = time_window_fun {
             if self != &StatsDataTypeKind::Date && self != &StatsDataTypeKind::DateTime {
                 return None;