Need help with error in Oracle SQL query - sql

Question

this is the query:
SELECT DISTINCT pprom.pk
FROM
(
SELECT
item_t0.SourcePK as pk
FROM
links item_t0
WHERE (? = item_t0.TargetPK AND item_t0.SourcePK in (?,?))
AND (item_t0.TypePkString=? )
UNION
SELECT
item_t1.TargetPK as pk
FROM
cat2prodrel item_t1
WHERE ( item_t1.SourcePK in (? ) AND item_t1.TargetPK in (?,?))
AND (item_t1.TypePkString=? )
) AS pprom
And this is the error:
ORA-00933: SQL command not properly ended
Any ideas what could be wrong?
Edit:
The question marks are replaced by PKs of the respective items:
values = [PropertyValue:8802745684882, PropertyValue:8796177006593, PropertyValue:8796201713665, 8796110520402, PropertyValue:8796125954190, PropertyValue:8796177006593, PropertyValue:8796201713665, 8796101705810]
Edit 2:
The query is executed deep inside some proprietary software system so I don't know exactly the code that runs it.
Edit 3:
I found one more query that's a little shorter but results in the same error message:
SELECT DISTINCT pprom.pk
FROM
(
SELECT
item_t0.SourcePK as pk
FROM
links item_t0
WHERE (? = item_t0.TargetPK AND item_t0.SourcePK in (?))
AND (item_t0.TypePkString=? )
) AS pprom
Using the following values:
values = [PropertyValue:8799960601490, PropertyValue:8796177006593, 8796110520402]
Edit 4
I found the SQL code that is sent to the db after replacing the values:
SELECT DISTINCT pprom.pk
FROM
(
SELECT
item_t0.SourcePK as pk
FROM
links item_t0
WHERE (8801631769490 = item_t0.TargetPK AND item_t0.SourcePK in (8796177006593))
AND (item_t0.TypePkString=8796110520402 )
) AS pprom
I also tried executing the inner SELECT statement and that alone runs ok and returns a single PK as a result.

Answer 1

I could not find any obvious syntax error in your query so I'd presume the issue is the client library you are using to convert the ? place holders into actual values. Your question edit displays a sort of dump where there are 8 integers but only 6 PropertyValue items. Make sure that's not the issue: IN (?, ?) requires 2 parameters.
Edit
Try removing the AS keyword when you assign an alias to the subquery:
SELECT DISTINCT pprom.pk
FROM
(
SELECT
item_t0.SourcePK as pk
FROM
links item_t0
WHERE (8801631769490 = item_t0.TargetPK AND item_t0.SourcePK in (8796177006593))
AND (item_t0.TypePkString=8796110520402 )
) AS pprom
^^