Making an argument optional in terraform resource block

Question

Can we make argument usage present in a resource block optional for eg like in below resource block table_name , mapping_rule_name and data_format are optional parameter and I want to have a standard format for terraform where I can make these values optional for e.g like if var.table_name variable has value it should provide it to table_name otherwise table_name should be ignored i.e. eventhubconnection be formed without table_name,mapping_rule_name and data_format as these are optional value

resource "azurerm_kusto_eventhub_data_connection" "eventhub_connection" {
  name                = "my-kusto-eventhub-data-connection"
  resource_group_name = azurerm_resource_group.rg.name
  location            = azurerm_resource_group.rg.location
  cluster_name        = azurerm_kusto_cluster.cluster.name
  database_name       = azurerm_kusto_database.database.name

  eventhub_id    = azurerm_eventhub.eventhub.id
  consumer_group = azurerm_eventhub_consumer_group.consumer_group.name

  table_name        = var.table_name       #(Optional)
  mapping_rule_name = var.mapping_rule_name #(Optional)
  data_format       = var.data_format          #(Optional)
} 

Is there any way to do that in terraform?