Feat: bubble up comments nested under a Bracket, fixes #5131

Author: georgesittas

sqlglot/parser.py

@@ -6234,7 +6234,12 @@ def _parse_bracket(self, this: t.Optional[exp.Expression] = None) -> t.Optional[
             expressions = apply_index_offset(
                 this, expressions, -self.dialect.INDEX_OFFSET, dialect=self.dialect
             )
-            this = self.expression(exp.Bracket, this=this, expressions=expressions)
+            this = self.expression(
+                exp.Bracket,
+                this=this,
+                expressions=expressions,
+                comments=this.pop_comments(),
+            )
 
         self._add_comments(this)
         return self._parse_bracket(this)

tests/fixtures/pretty.sql

@@ -457,3 +457,15 @@ ON t.id = s.id
 WHEN MATCHED THEN UPDATE SET
   status = s.status,
   amount = s.amount;
+
+SELECT
+    id,
+    -- SUM(total) as all_that,
+    ARRAY_AGG(foo)[0][0] AS first_foo,
+FROM facts
+GROUP BY all;
+SELECT
+  id,
+  ARRAY_AGG(foo)[0][0] AS first_foo /* SUM(total) as all_that, */
+FROM facts
+GROUP BY ALL;