# classname_delete_all

> This function deletes all database objects of this class.

### Prototype

>         MCO_RET	classname_delete_all(	/*IN*/ mco_trans_h t );

### Arguments

t | A `MCO_READ_WRITE` transaction handle returned by`mco_trans_start()`

### Description

This function will remove all objects (and their index entries) of a given class.

### Return Codes

MCO_S_OK | The objects were deleted successfully
MCO_E_ACCESS | The transaction handle is `MCO_READ_ONLY`
MCO_E_DELETED | This object has been deleted
MCO_E_NOMEM | Database memory allocation error
MCO_ERR_TRN | Error in the enclosing transaction

### Example

> The following code snippets demonstrate how `classname_delete_all()` is used to delete all database objects of a specific class.

        Snippet from schema file:

        class Record
        {
            uint4 key;

            hash <key> hkey;
        };

        Application snippet:

        int delete_records(mco_db_h db)
        {
            MCO_RET rc;
            mco_trans_h t;

            rc = mco_trans_start(db, MCO_READ_WRITE, MCO_TRANS_FOREGROUND, &t);
            if ( MCO_S_OK == rc )
            {
                rc = Record_delete_all(t);
                if ( MCO_S_OK == rc )
                 {
                    rc = mco_trans_commit(t);
                }
                else
                {
                    printf("\n\t error(%d) from delete_all", rc);
                    rc = mco_trans_rollback(t);
                }
            }
            ...
        }

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