The following variables are used for maintaining and querying the status of key lists.
| Variable | Description |
|---|---|
| @CURSORS | A list of active cursors. |
| @LIST_ACTIVE | The flag that indicates whether there is an active select list in cursor 0, and what type of list it is. Flag - Value 0 - No select list active. 1 - Latent table-based list active. 2 - active. 3 - active. |
| @PRI_FILE | The file handle for the table represented in cursor zero. |
| @QUERY_DICT | The file handle for the dictionary represented in cursor zero. |
| @RECCOUNT | If there is an active, resolved select list, this variable contains the number of keys in the list. |
| @REDUCTION_DONE | Contains 1 if the key list in cursor 0 is completely resolved, otherwise it is null. |
| @RN_COUNTER | The ReadNext counter. Incremented for each row examined by the ReadNext statement. It must be initialized by the procedure to a starting value (usually zero). |