MySql: SqlNullValueException Generating Models

Generating my datamodels is firing an SqlNullValueException when getting my schema (magento). Does anyone know how to resolve this?

CODE:

    var connectionString = "Server=localhost;Port=3306;Database=magento;Uid=root;Pwd=1234;charset=utf8;ConvertZeroDatetime=True;AllowZeroDatetime=True;";

     // not working
    var sp = dataConnection.DataProvider.GetSchemaProvider();
    var db = sp.GetSchema(dataConnection);

    // working 
    var connection = new MySqlConnection(connectionString);
    var db2 = connection.GetSchema();

    // working - extra
    var command = connection.CreateCommand();
    command.CommandText = "SHOW TABLES;";

    var reader = command.ExecuteReader();

    while (reader.Read())
    {
        var row = "";
        for (var i = 0; i < reader.FieldCount; i++)
            row += reader.GetValue(i).ToString() + ", ";
        Console.WriteLine(row);
    }
    connection.Close();

ERROR: Running transformation: System.Data.SqlTypes.SqlNullValueException: Data is Null. This method or property cannot be called on Null values. at MySql.Data.MySqlClient.MySqlDataReader.GetFieldValue(Int32 index, Boolean checkNull) at MySql.Data.MySqlClient.MySqlDataReader.GetString(Int32 i) at MySql.Data.MySqlClient.MySqlDataReader.GetString(String column) at MySql.Data.MySqlClient.SchemaProvider.GetIndexColumns(String[] restrictions) at MySql.Data.MySqlClient.SchemaProvider.GetSchemaInternal(String collection, String[] restrictions) at MySql.Data.MySqlClient.ISSchemaProvider.GetSchemaInternal(String collection, String[] restrictions) at MySql.Data.MySqlClient.SchemaProvider.GetSchema(String collection, String[] restrictions) at MySql.Data.MySqlClient.MySqlConnection.GetSchema(String collectionName, String[] restrictionValues) at MySql.Data.MySqlClient.MySqlConnection.GetSchema(String collectionName) at LinqToDB.DataProvider.MySql.MySqlSchemaProvider.GetPrimaryKeys(DataConnection dataConnection) at LinqToDB.SchemaProvider.SchemaProviderBase.GetSchema(DataConnection dataConnection, GetSchemaOptions options) at Microsoft.VisualStudio.TextTemplatingB41FF171F1D676BBB07B6DF817D0F73ED0CBC95FB4CC7ECDC5E60FA2EE25F117EC5BF9EE7E5389A250AC2F106B5484E253B1CA37CEE331162BC4836EB5843F12.GeneratedTextTransformation.LoadServerMetadata(DataConnection dataConnection) in C:\Users\Wesley.PACOLIBA\Documents\## Code\ERP\intershoe\TestMagento - LinqToDb\LinqToDB.Templates\DataModel.ttinclude:line 56 at Microsoft.VisualStudio.TextTemplatingB41FF171F1D676BBB07B6DF817D0F73ED0CBC95FB4CC7ECDC5E60FA2EE25F117EC5BF9EE7E5389A250AC2F106B5484E253B1CA37CEE331162BC4836EB5843F12.GeneratedTextTransformation.LoadMetadata(DataConnection dataConnection) in C:\Users\Wesley.PACOLIBA\Documents\## Code\ERP\intershoe\TestMagento - LinqToDb\LinqToDB.Templates\DataModel.ttinclude:line 310 at Microsoft.VisualStudio.TextTemplatingB41FF171F1D676BBB07B6DF817D0F73ED0CBC95FB4CC7ECDC5E60FA2EE25F117EC5BF9EE7E5389A250AC2F106B5484E253B1CA37CEE331162BC4836EB5843F12.GeneratedTextTransformation.LoadMySqlMetadata(String server, String database, String uid, String password, Int32 port) in C:\Users\Wesley.PACOLIBA\Documents\## Code\ERP\intershoe\TestMagento - LinqToDb\LinqToDB.Templates\LinqToDB.MySql.ttinclude:line 28 at Microsoft.VisualStudio.TextTemplatingB41FF171F1D676BBB07B6DF817D0F73ED0CBC95FB4CC7ECDC5E60FA2EE25F117EC5BF9EE7E5389A250AC2F106B5484E253B1CA37CEE331162BC4836EB5843F12.GeneratedTextTransformation.TransformText() in C:\Users\Wesley.PACOLIBA\Documents\## Code\ERP\intershoe\TestMagento - LinqToDb\DataModels\Magento.tt:line 38 TestMagento - LinqToDb C:\Users\Wesley.PACOLIBA\Documents\## Code\ERP\intershoe\TestMagento - LinqToDb\LinqToDB.Templates\DataModel.ttinclude 56

[sdanyliv]

Try to ensure that your indexes have all the following fields NOT NULL. Here is decompiled source of problematic method.

    public virtual MySqlSchemaCollection GetIndexColumns(string[] restrictions)
    {
      MySqlSchemaCollection schemaCollection = new MySqlSchemaCollection("IndexColumns");
      schemaCollection.AddColumn("INDEX_CATALOG", typeof (string));
      schemaCollection.AddColumn("INDEX_SCHEMA", typeof (string));
      schemaCollection.AddColumn("INDEX_NAME", typeof (string));
      schemaCollection.AddColumn("TABLE_NAME", typeof (string));
      schemaCollection.AddColumn("COLUMN_NAME", typeof (string));
      schemaCollection.AddColumn("ORDINAL_POSITION", typeof (int));
      schemaCollection.AddColumn("SORT_ORDER", typeof (string));
      string[] restrictions1 = new string[Math.Max(restrictions == null ? 4 : restrictions.Length, 4)];
      if (restrictions != null)
        restrictions.CopyTo((Array) restrictions1, 0);
      restrictions1[3] = "BASE TABLE";
      foreach (MySqlSchemaRow row in (IEnumerable<MySqlSchemaRow>) this.GetTables(restrictions1).Rows)
      {
        using (MySqlDataReader reader = new MySqlCommand(string.Format("SHOW INDEX FROM `{0}`.`{1}`", row["TABLE_SCHEMA"], row["TABLE_NAME"]), this.connection).ExecuteReader())
        {
          while (reader.Read())
          {
            string str1 = SchemaProvider.GetString(reader, reader.GetOrdinal("KEY_NAME"));
            string str2 = SchemaProvider.GetString(reader, reader.GetOrdinal("COLUMN_NAME"));
            if (restrictions == null || (restrictions.Length < 4 || restrictions[3] == null || !(str1 != restrictions[3])) && (restrictions.Length < 5 || restrictions[4] == null || !(str2 != restrictions[4])))
            {
              MySqlSchemaRow mySqlSchemaRow = schemaCollection.AddRow();
              mySqlSchemaRow["INDEX_CATALOG"] = (object) null;
              mySqlSchemaRow["INDEX_SCHEMA"] = row["TABLE_SCHEMA"];
              mySqlSchemaRow["INDEX_NAME"] = (object) str1;
              mySqlSchemaRow["TABLE_NAME"] = (object) SchemaProvider.GetString(reader, reader.GetOrdinal("TABLE"));
              mySqlSchemaRow["COLUMN_NAME"] = (object) str2;
              mySqlSchemaRow["ORDINAL_POSITION"] = reader.GetValue(reader.GetOrdinal("SEQ_IN_INDEX"));
              mySqlSchemaRow["SORT_ORDER"] = (object) reader.GetString("COLLATION");
            }
          }
        }
      }
      return schemaCollection;
    }

For example and probably it’s a problem:

reader.GetString("COLLATION")

[sdanyliv]

It’s a known bug https://bugs.mysql.com/bug.php?id=75301

How to repeat: Define a full text search index on any table and then run the following code