oracle upsert question

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SQL

begin

Insert into  I_CONTEXT (Trade_name , Indication, Material) values ( :Trade_name,:Indication, :Material);


if (:Material exists) then

Update  I_CONTEXT set Trade_name = :Trade_name , Indication = :Indication where material = :Material;

 end if
end;
commit;

Material is not a PK
I am getting the following error

XML

ORA-06550: line 7, column 15:
PLS-00103: Encountered the symbol "EXISTS" when expecting one of the following:

   . ( ) , * @ % & = - + < / > at in is mod remainder not rem =>
   <an exponent (**)> <> or != or ~= >= <= <> and or like like2
   like4 likec as between || indicator multiset member
   submultiset
The symbol "." was substituted for "EXISTS" to continue.

Posted 5-Aug-11 8:45am

rbjanaki

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Wendelius · Answer 1 · 2011-08-05T08:50:00

The problem is the if statement. If :material is a bind variable and you want to check if the value is null then you could use:

if :Material IS NULL then

However, your code will always first insert the row and the update it if the material has a value. If you want to do an actual upsert, see Merge[^]

Chris Meech · Answer 2 · 2011-08-05T09:04:00

Solution 2

Since you mention that Material is not a PK, though there could be a UNIQUE constraint on the column, be aware that your UPDATE could change multiple rows, not just the one that was just inserted.

Posted 5-Aug-11 9:04am

Chris Meech

Updated 5-Aug-11 9:05am

v2