Create TSQL function and use it in the etl scenario. Use Sybase app_context

<?xml version="1.0" encoding="UTF-8"?>
<scenario>
     <name>Create TSQL function and use it in the etl scenario. Use Sybase app_context</name>
     <script>t_function</script>
     <driver>com.toolsverse.etl.driver.sqlserver.SybaseDriver</driver>
     <allow>EXTRACT_LOAD</allow>

<sources>
          <source>
               <name>employee</name>
               <extract>
                    <sql>select EMPNO,FIRSTNME,MIDINIT,LASTNAME,BIRTHDATE,SEX from employee</sql>
               </extract>
          </source>
     </sources>
     <destinations>
          <destination type="function">
               <name>to_value</name>
               
               <objectname>to_value</objectname>
               <load>
                    <sql>
                        create function to_value(@v_value int) RETURNS CHAR(6)
                        AS  
                        BEGIN
                           return CAST(@v_value as char(6))
                        END
                   </sql>
               </load>
          </destination>

<destination>
               <name>init_global_var</name>
               
               <load>
                   <sql>select @v_dummy = set_appcontext('t_function','val','0')</sql>
               </load>     
          </destination>

<destination>
               <name>employee</name>
               <tablename>employee_function</tablename>
               <metadata>true</metadata>
               <load>
                    <variables>
                         
                         <VAL type="int" sqltype="2" sql="select {VAL} = CAST(get_appcontext('t_function','val') as int) + 1 
                                              select @v_dummy = rm_appcontext('t_function','val')
                                              select @v_dummy = set_appcontext('t_function','val',CAST({VAL} as char(30)))" 
                                              include="false"  />
                         <EMPNO sql="select {EMPNO} = dbo.to_value({VAL})" />
                    </variables>
               </load>
          </destination>
     </destinations>
</scenario>