2 files changed, 22 insertions, 8 deletions
diff --git a/lib/sqlalchemy/dialects/postgresql/array.py b/lib/sqlalchemy/dialects/postgresql/array.py
index f30a409c7..abe17ea35 100644
--- a/lib/sqlalchemy/dialects/postgresql/array.py
+++ b/lib/sqlalchemy/dialects/postgresql/array.py
@@ -94,13 +94,12 @@ class array(expression.ClauseList, expression.ColumnElement):
             coercions.expect(roles.ExpressionElementRole, c) for c in clauses
         ]
 
-        super(array, self).__init__(*clauses, **kw)
-
         self._type_tuple = [arg.type for arg in clauses]
         main_type = kw.pop(
             "type_",
             self._type_tuple[0] if self._type_tuple else sqltypes.NULLTYPE,
         )
+        super(array, self).__init__(*clauses, **kw)
 
         if isinstance(main_type, ARRAY):
             self.type = ARRAY(
diff --git a/lib/sqlalchemy/dialects/postgresql/dml.py b/lib/sqlalchemy/dialects/postgresql/dml.py
index 48b180e81..09dbd9558 100644
--- a/lib/sqlalchemy/dialects/postgresql/dml.py
+++ b/lib/sqlalchemy/dialects/postgresql/dml.py
@@ -17,11 +17,31 @@ from ...sql.base import ColumnCollection
 from ...sql.dml import Insert as StandardInsert
 from ...sql.elements import ClauseElement
 from ...sql.expression import alias
-from ...util.langhelpers import public_factory
 
 
 __all__ = ("Insert", "insert")
 
+
+def insert(table):
+    """Construct a PostgreSQL-specific variant :class:`_postgresql.Insert`
+    construct.
+
+    .. container:: inherited_member
+
+        The :func:`sqlalchemy.dialects.postgresql.insert` function creates
+        a :class:`sqlalchemy.dialects.postgresql.Insert`.  This class is based
+        on the dialect-agnostic :class:`_sql.Insert` construct which may
+        be constructed using the :func:`_sql.insert` function in
+        SQLAlchemy Core.
+
+    The :class:`_postgresql.Insert` construct includes additional methods
+    :meth:`_postgresql.Insert.on_conflict_do_update`,
+    :meth:`_postgresql.Insert.on_conflict_do_nothing`.
+
+    """
+    return Insert(table)
+
+
 SelfInsert = typing.TypeVar("SelfInsert", bound="Insert")
 
 
@@ -183,11 +203,6 @@ class Insert(StandardInsert):
         return self
 
 
-insert = public_factory(
-    Insert, ".dialects.postgresql.insert", ".dialects.postgresql.Insert"
-)
-
-
 class OnConflictClause(ClauseElement):
     stringify_dialect = "postgresql"