Is there a fix limit how long an SQL query may be?

Hello,
I am currently writing an application (java/jdbc/thin-driver) which executes a simple but very big query which looks like the following:
SELECT CALKEY, PERSNO, MANDT FROM PERSONS WHERE MANDT='1' AND PERSNO='100471' OR MANDT='1' AND PERSNO='100838' OR MANDT='1' AND PERSNO='101010' (to be continued the next 400kb)
For now I am not able to test it with oracle but a not as professional database aborts simply by throwing an SQLException even with that "small" 400kb query, however this query could easily grow to 2-5mb too.
Will the oracle jdbc-thin driver correctly process that large queries (and how fast?) and are there limits for the size of an SQL query?
Thank you in advance, lg Clemens

Hello and thats a lot for the suggestions and tips you gave me.
where does all those 100471, 100838 came from ? would
not it make sense to have those in the database?The problem lies in the fact that I get this data from our sap->db interface with beeing the "100471" the personal numbers of our users. So it would not make that much sence (from the performance point of view) to create a temporary table since the whole time needed to create+fill+drop the table would take longer than this approach.
Thanks for the tips with the different synthax this really should reduce the lenght of the query.
I also implemented a lenght-limit now, if the query string would become larger than a dynamically set limit a second query is generated and results are both added to a list.
Thanks a lot for all this useful tips and suggestion, lg Clemens

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