Fix Bug#27441433 - RESETREADER: MYSQLDATAREADER CANNOT OUTLIVE PARENT…

… MYSQLCOMMAND SINCE 6.10

Removed the ResetReader method when a MySqlCommand object is disposed of, because it restricted access to the MySqlDataReader object after the MySqlCommand object closed

CHANGES

@@ -3,6 +3,7 @@
 - Added support to handle Schema validation in the commands CreateCollection and ModifyCollection (WL13007)
 - Added support for compressing data exchanged between the server and client when using the X Protocol. A new connection option,
   compression, provides the following values: Preferred (Default), Required, Disabled (WL12980).
+- Removed the ResetReader method when a MySqlCommand object is disposed of, because it restricted access to the MySqlDataReader object after the MySqlCommand object closed (MySQL Bug #89159, Oracle Bug #27441433).
 
 
 8.0.19

MySQL.Data/src/command.cs

@@ -941,8 +941,6 @@ protected override void Dispose(bool disposing)
       if (statement != null && statement.IsPrepared)
         statement.CloseStatement();
 
-      ResetReader();
-
       base.Dispose(disposing);
 
       disposed = true;

MySQL.Data/tests/MySql.Data.Tests/CmdTests.cs

@@ -678,6 +678,29 @@ public void CloneCommand()
       IDbCommand newCommand2 = (IDbCommand)(cmd as ICloneable).Clone();
     }
 
+    /// <summary>
+    /// Bug 27441433 - RESETREADER: MYSQLDATAREADER CANNOT OUTLIVE PARENT MYSQLCOMMAND SINCE 6.10
+    /// </summary>
+    [Fact]
+    public void ExecuteReaderAfterClosingCommand()
+    {
+      MySqlDataReader reader;
+
+      using (MySqlConnection conn = new MySqlConnection(Connection.ConnectionString))
+      {
+        using (MySqlCommand cmd = new MySqlCommand("SELECT 'TEST'", conn))
+        {
+          conn.Open();
+          cmd.CommandType = CommandType.Text;
+          reader = cmd.ExecuteReader();
+        }
+
+        Assert.True(reader.Read());
+        Assert.Equal("TEST", reader.GetString(0));
+        Assert.False(reader.Read());
+      }
+    }
+
     #region SQL Injection
 
     /// <summary>