FETCH

FETCH

Reads the next nondeleted row from a SAS table into the Table Data Vector (TDV)

Category: SAS Table

Syntax
Details
Example
See Also

Syntax

sysrc=FETCH(table-id<,'NOSET'>);

sysrc

contains the return code for the operation:

0	successful
>0	not successful
<0	the operation was completed, but a warning was generated. If the row is locked, it is still fetched (read in) but a *sysrc* of `_SWNOUPD` is returned.
-1	the end of the table was reached

Type: Numeric

table-id

is the identifier that was assigned when the table was opened. If table-id is invalid, the program halts.

Type: Numeric

'NOSET'

prevents the automatic passing of SAS table column values to SCL variables even if the SET routine has been called.

Type: Numeric

Details

FETCH skips rows that have been marked for deletion. When a WHERE clause is active, the function reads the next row that meets the WHERE condition.

If the SET routine has previously been called, the values for any table columns that are also window variables or SCL variables for the application are automatically passed from the TDV to the SCL Data Vector (SDV). To temporarily override this behavior so that fetched values are not automatically copied to the SDV, use the NOSET option.

Example

Fetch the next row from the SAS table MYDATA. If the end of the table is reached or if an error occurs, SYSMSG retrieves the appropriate message and displays it on the message line.

INIT:
   tableid=open('mydata','i');
return;

MAIN:
   rc=fetch(tableid);
   if rc then _msg_=sysmsg();
   else
      do;
        ...more SCL statements...
      end;
return;

TERM:
   rc=close(tableid);
return;

See Also

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