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CASE clause

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CASE clause DB2 Development forum discussing administration, DB2 queries, SQL/PL, and other DB2-related topics. Covers the entire DB2 line, including UDB (DB2 for Unix and Linux), midrange (AS/400) and mainframe versions.

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  #1  
Old February 17th, 2005, 12:18 PM
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CASE clause
Hi,
How many WHEN condition can you have in a CASE clause in DB2?

Thankns
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Old February 18th, 2005, 08:11 AM
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I cannot recall ever seeing where DB2 has stated a limit to the number of case statements that you can have in a single statement. Though if your entire statement is exceeding large you might want to consider using external means.
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Old February 18th, 2005, 10:33 AM
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I have a procedure with 2 CASE clauses. Every CASE clause has 80 WHEN condition. Every time when I try to create this procedure I am disconnected from the server. If I let only one CASE clause then it is ok.
Thnaks
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Originally Posted by Onslaught
I cannot recall ever seeing where DB2 has stated a limit to the number of case statements that you can have in a single statement. Though if your entire statement is exceeding large you might want to consider using external means.
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Old February 18th, 2005, 04:43 PM
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You may be running over the tablespace size on your database, you may want to consider adjusting that, or reorganizing your data so that you don't need such an extreme amount of when conditions.
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Old February 19th, 2005, 10:37 AM
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put the 80 conditions into a separate table and do a join
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Old February 21st, 2005, 02:10 PM
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What might you be doing with those 2 case statements with all the 'wheres' ? Can you post a small sample?

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