Raise an error for dates > 10K instead of returning Y9999

Close psycopg#1307.

Author: dvarrazzo

NEWS

@@ -1,10 +1,16 @@
 Current release
 ---------------
 
+What's new in psycopg 2.9.2
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Raise `ValueError` for dates >= Y10k (:ticket:`#1307`)
+
+
 What's new in psycopg 2.9.1
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-Fix regression with named `sql.Placeholder` (:ticket:`1291`).
+Fix regression with named `sql.Placeholder` (:ticket:`#1291`).
 
 
 What's new in psycopg 2.9

psycopg/typecast_datetime.c

@@ -71,7 +71,6 @@ typecast_PYDATE_cast(const char *str, Py_ssize_t len, PyObject *curs)
             return NULL;
         }
         else {
-            if (y > 9999) y = 9999;
             obj = PyObject_CallFunction(
                 (PyObject*)PyDateTimeAPI->DateType, "iii", y, m, d);
         }
@@ -172,8 +171,6 @@ _parse_noninftz(const char *str, Py_ssize_t len, PyObject *curs)
         mm += 1;
         ss -= 60;
     }
-    if (y > 9999)
-        y = 9999;
 
     tzinfo_factory = ((cursorObject *)curs)->tzinfo_factory;
     if (n >= 5 && tzinfo_factory != Py_None) {

tests/test_dates.py

@@ -115,12 +115,26 @@ def setUp(self):
         self.DATETIME = psycopg2.extensions.PYDATETIME
         self.INTERVAL = psycopg2.extensions.PYINTERVAL
 
+    def test_parse_10k_date(self):
+        # datetime does not support dates larger than date.max
+        self.assertEqual(self.DATE('9999-12-31', self.curs), date(9999, 12, 31))
+        self.assertRaises(ValueError, self.DATE, '10000-01-01', self.curs)
+
     def test_parse_bc_date(self):
         # datetime does not support BC dates
+        self.assertEqual(self.DATE('0001-01-01', self.curs), date(1, 1, 1))
         self.assertRaises(ValueError, self.DATE, '00042-01-01 BC', self.curs)
 
+    def test_parse_10k_datetime(self):
+        # datetime does not support dates larger than date.max
+        self.assertEqual(self.DATETIME('9999-12-31 23:59:59', self.curs),
+                         datetime(9999, 12, 31, 23, 59, 59))
+        self.assertRaises(ValueError, self.DATE, '10000-01-01', self.curs)
+
     def test_parse_bc_datetime(self):
         # datetime does not support BC dates
+        self.assertEqual(self.DATETIME('0001-01-01 13:30:29', self.curs),
+            datetime(1, 1, 1, 13, 30, 29))
         self.assertRaises(ValueError, self.DATETIME,
                           '00042-01-01 13:30:29 BC', self.curs)