Reset LastInsertedId to 0 between commands, not -1. Fixes #1147

Author: bgrainger

src/MySqlConnector/Core/CommandExecutor.cs

@@ -49,7 +49,7 @@ public static async Task<MySqlDataReader> ExecuteReaderAsync(IReadOnlyList<IMySq
 
 			using var payload = writer.ToPayloadData();
 			connection.Session.StartQuerying(command.CancellableCommand);
-			command.SetLastInsertedId(-1);
+			command.SetLastInsertedId(0);
 			try
 			{
 				await connection.Session.SendAsync(payload, ioBehavior, CancellationToken.None).ConfigureAwait(false);

tests/SideBySide/InsertTests.cs

@@ -185,6 +185,27 @@ Foreign Key(foreign_id) REFERENCES TestTable(id)
 		}
 	}
 
+	[Fact]
+	public async Task LastInsertedIdInsertIgnore()
+	{
+		await m_database.Connection.ExecuteAsync(@"drop table if exists insert_ai;
+create table insert_ai(rowid integer not null primary key auto_increment, text varchar(100) not null);
+");
+		try
+		{
+			await m_database.Connection.OpenAsync();
+			using var command = new MySqlCommand(@"INSERT IGNORE INTO insert_ai (rowid, text) VALUES (2, 'test');", m_database.Connection);
+			Assert.Equal(1, await command.ExecuteNonQueryAsync());
+			Assert.Equal(2L, command.LastInsertedId);
+			Assert.Equal(0, await command.ExecuteNonQueryAsync());
+			Assert.Equal(0L, command.LastInsertedId);
+		}
+		finally
+		{
+			m_database.Connection.Close();
+		}
+	}
+
 	[Fact]
 	public async Task RowsAffected()
 	{