Fix connection closing issue in conncection pool

.github/workflows/pypi.yml

@@ -15,7 +15,7 @@ jobs:
         with:
           fetch-depth: 0
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.17.0
+        uses: pypa/cibuildwheel@v2.22.0
         env:
           CIBW_SKIP: "cp36-* cp37-* pp36-* pp37-*"
       - uses: actions/upload-artifact@v4

asyncmy/connection.pyx

@@ -354,7 +354,7 @@ class Connection:
         return self._last_usage
 
     async def ensure_closed(self):
-        """Close connection without QUIT message."""
+        """Send QUIT message and close connection."""
         if self._connected:
             send_data = i.pack(1) + B.pack(COM_QUIT)
             self._write_bytes(send_data)
@@ -1099,10 +1099,9 @@ cdef class MySQLResult:
             self.field_count = first_packet.read_length_encoded_integer()
             await self._get_descriptions()
 
-            # Apparently, MySQLdb picks this number because it's the maximum
-            # value of a 64bit unsigned integer. Since we're emulating MySQLdb,
-            # we set it to this instead of None, which would be preferred.
-            self.affected_rows = 18446744073709551615
+            # MySQLdb used 18446744073709551615 to indicate an undefined state.
+            # We now use -1 for the same purpose to avoid overflow issues.
+            self.affected_rows = -1
 
     def _read_ok_packet(self, first_packet):
         ok_packet = OKPacketWrapper(first_packet)

asyncmy/pool.pyx

@@ -95,7 +95,7 @@ class Pool(asyncio.AbstractServer):
 
         while self._free:
             conn = self._free.popleft()
-            conn.close()
+            await conn.ensure_closed()
 
         async with self._cond:
             while self.size > self.freesize:
@@ -133,7 +133,7 @@ class Pool(asyncio.AbstractServer):
 
             elif self._recycle > -1 and self._loop.time() - conn.last_usage > self._recycle:
                 self._free.pop()
-                conn.close()
+                await conn.ensure_closed()
 
             else:
                 self._free.rotate()