add count() from (unnest()) explain result

src/query/sql/src/planner/optimizer/rule/rewrite/rule_fold_count_aggregate.rs

@@ -20,7 +20,6 @@ use common_expression::Scalar;
 use crate::optimizer::rule::Rule;
 use crate::optimizer::rule::RuleID;
 use crate::optimizer::rule::TransformResult;
-use crate::optimizer::util::contaions_project_set;
 use crate::optimizer::RelExpr;
 use crate::optimizer::SExpr;
 use crate::plans::Aggregate;

tests/sqllogictests/suites/query/02_function/02_0062_function_unnest

@@ -396,6 +396,36 @@ select count() from (select unnest(id), c1 from fold_count)
 ----
 4
 
+query T
+explain select count() from (select unnest(id), c1 from fold_count)
+----
+EvalScalar
+├── expressions: [count() (#4)]
+├── estimated rows: 1.00
+└── AggregateFinal
+    ├── group by: []
+    ├── aggregate functions: [count()]
+    ├── estimated rows: 1.00
+    └── AggregatePartial
+        ├── group by: []
+        ├── aggregate functions: [count()]
+        ├── estimated rows: 1.00
+        └── EvalScalar
+            ├── expressions: [get(unnest (#2))]
+            ├── estimated rows: 1.00
+            └── ProjectSet
+                ├── estimated rows: 1.00
+                ├── set returning functions: unnest(CAST(fold_count.id (#0) AS Array(Int32 NULL)))
+                └── TableScan
+                    ├── table: default.db_02_0062.fold_count
+                    ├── read rows: 1
+                    ├── read bytes: 76
+                    ├── partitions total: 1
+                    ├── partitions scanned: 1
+                    ├── pruning stats: [segments: <range pruning: 1 to 1>, blocks: <range pruning: 1 to 1, bloom pruning: 0 to 0>]
+                    ├── push downs: [filters: [], limit: NONE]
+                    └── estimated rows: 1.00
+
 statement ok
 drop table fold_count;