The directive Specification

Each directive specification in the SAVE EXTERNAL DIRECTIVES statement must follow the syntax of the Optimizer Directives segment, as described in Optimizer Directives, except that if you specify more than one directive, you must separate them in the directives list by a blank character, rather than by a comma ( , ) symbol, as in the following example:

SAVE EXTERNAL DIRECTIVES /*+ AVOID_INDEX (table1 index1)*/ /*+ FULL(table1) */ 
       ACTIVE FOR 
           SELECT /*+ INDEX( table1 index1 ) */  col1, col2 
               FROM table1, table2 WHERE table1.col1 = table2.col1;