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SQL Procedure Pass-Through Facility

The SQL Procedure Pass-Through Facility is an extension of the SQL procedure that enables you to send DBMS-specific statements to a DBMS and to retrieve DBMS data. You specify DBMS SQL syntax instead of SAS SQL syntax when you use the Pass-Through Facility. You can use Pass-Through Facility statements in a PROC SQL query or store them in a PROC SQL view.

The Pass-Through Facility consists of three statements and one component:

The CONNECT statement establishes a connection to the DBMS.
The EXECUTE statement sends dynamic, non-query DBMS-specific SQL statements to the DBMS.
The CONNECTION TO component in the FROM clause of a PROC SQL SELECT statement retrieves data directly from a DBMS.
The DISCONNECT statement terminates the connection to the DBMS.

The following Pass-Through Facility example sends a query to an ORACLE database for processing:

proc sql;
   connect to oracle as myconn (user=smith password=secret 
      path='myoracleserver');

   select * 
      from connection to myconn
         (select empid, lastname, firstname, salary
            from employees
            where salary>75000);

   disconnect from myconn;
quit;

The example uses the Pass-Through CONNECT statement to establish a connection with an ORACLE database with the specified values for the USER=, PASSWORD=, and PATH= arguments. The CONNECTION TO component in the FROM clause of the SELECT statement enables data to be retrieved from the database. The DBMS-specific statement that is sent to ORACLE is enclosed in parentheses. The DISCONNECT statement terminates the connection to ORACLE.

To store the same query in a PROC SQL , use the CREATE VIEW statement:

libname viewlib 'SAS-library';

proc sql;    
   connect to oracle as myconn (user=smith password=secret 
      path='myoracleserver'); 
    
   create view viewlib.salary as
      select * 
         from connection to myconn       
            (select empid, lastname, firstname, salary          
               from employees          
               where salary>75000);  
   
   disconnect from myconn; 
quit;

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