public static void T_StoreProcMultiResultSet3()
{
var connStr = GetMySqlConnString();
var conn = new MySqlConnection(connStr);
//Console.WriteLine("1");
conn.Open();
PrepareTable1(conn);
// Console.WriteLine("2");
{
string createStoreProcSql = @"DROP PROCEDURE IF EXISTS multi;";
var cmd = new MySqlCommand(createStoreProcSql, conn);
// Console.WriteLine("3");
cmd.ExecuteNonQuery();
}
{
string createStoreProcSql = @"CREATE PROCEDURE multi() BEGIN
SELECT 1011 as A;
SELECT 1022 as B;
select col_id from test001;
END";
//Console.WriteLine("4");
var cmd = new MySqlCommand(createStoreProcSql, conn);
cmd.ExecuteNonQuery();
}
{
// Console.WriteLine("5");
string callProc = "call multi();";
var cmd = new MySqlCommand(callProc, conn);
//access to sub table
var currentSubTable = MySqlSubTable.Empty;
cmd.ExecuteSubTableReader(reader =>
{
if (reader.CurrentSubTable.Header != currentSubTable.Header)
{
//change main table
//some table may split into many sub table
}
currentSubTable = reader.CurrentSubTable;
//on each subtable
//create data reader for the subtable
while (reader.Read())
{
Console.WriteLine(reader.GetInt32(0));
}
//last table
if (currentSubTable.IsLastTable)
{
conn.Close();
}
});
}
}
public static ActionTask AsyncExecuteSubTableReader(this MySqlCommand cmd, TaskChain ch, Action <MySqlDataReader> readerReady)
{
return(ch.AddTask(() =>
{
ch.AutoCallNext = false;
cmd.ExecuteSubTableReader(subtable =>
{
//this method is respond for call next ***
ch.AutoCallNext = true;
readerReady(subtable);
if (ch.AutoCallNext)
{
ch.Next();
}
});
}));
//not use autocall next task, let the cmd call it when ready ***
}
