Npgsql.Tests.ReaderNewSchemaTests.ColumnSize C# (CSharp) Method

        public void ColumnSize()
        {
            using (var conn = OpenConnection())
            {
                conn.ExecuteNonQuery("CREATE TEMP TABLE data (bounded VARCHAR(30), unbounded VARCHAR)");

                using (var cmd = new NpgsqlCommand("SELECT bounded,unbounded,'a'::VARCHAR(10),'b'::VARCHAR FROM data", conn))
                using (var reader = cmd.ExecuteReader(CommandBehavior.SchemaOnly))
                {
                    var columns = reader.GetColumnSchema();
                    Assert.That(columns[0].ColumnSize, Is.EqualTo(30));
                    Assert.That(columns[1].ColumnSize, Is.Null);
                    Assert.That(columns[2].ColumnSize, Is.EqualTo(10));
                    Assert.That(columns[3].ColumnSize, Is.Null);
                }
            }
        }