Question

i got a little (at least i hope so) problem with an SQL Query. Here’s my join

WHERE obj.mod_type = 'SER'
   and obj.wrk_id=wrk_lang.id(+)
   and extractvalue(value(shm),'/*/@xmi:id','xmlns:xmi="http://www.omg.org/XMI"') = extractvalue(value(shm_con),'/*/@source')(+)

It gives me an “ORA-00936: missing expression”

When i remove the second outer join it works fine(also with a regular join).

Can smb. help me?

Answer 1

It looks to me like this is actually a LEFT outer join – in old-style Oracle syntax the (+) is put on the optional side of the join while in ANSI syntax the required side (LEFT or RIGHT) is called out in the JOIN specification – see this AskTom reference for examples. So, expanding on @FlorinGhita’s recommendation to use ANSI JOIN syntax (and making a bit of an assumption about the rest of the statement) we’d get something like

SELECT *
  FROM OBJ
  LEFT OUTER JOIN WRK_LANG
    ON (obj.wrk_id = wrk_lang.id and
        extractvalue(value(obj.shm),'/*/@xmi:id','xmlns:xmi="http://www.omg.org/XMI"') = 
          extractvalue(value(wrk_lang.shm_con),'/*/@source')
  WHERE obj.mod_type = 'SER';

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