RE: PL/SQL help

Ron

We've run into this problem and haven't really found a satisfactory answer. It sounds like a job for dbms_sql, but the docs say its slower than native dynamic sql. Has anyone tested this? One other alternative I can think of (but have never tried) is to use dummy conditions in the sql; something like: -

c_sql := 'select col1 from atable where col2 = :1 and :2 is null and :3 is null';

--
David Lord



> -----Original Message-----

> From: Ron Thomas [mailto:rthomas_at_hypercom.com]

> Sent: 19 September 2002 19:53

> To: Multiple recipients of list ORACLE-L

> Subject: PL/SQL help

> 

> 

> 

> I am building a dynamic sql statement which will contain 

> varying number of bind variables depending

> on user selection criteria.  As an example, the sql statement may be:

> 

> c_sql := 'select col1 from  atable where col2 = :1' ;

> 

> or it may be

> 

> c_sql := 'select col1 from  atable where col2 = :1 and col2 

> between :2 and :3' ;

> 

> or it may be ... etc.  I am trying to avoid ugly code such as:

> 

> IF case1 THEN

>   OPEN csr FOR c_sql USING var1 ;

> ELSIF case2 THEN

>   OPEN csr FOR c_sql USING var1, var2, var3 ;

> ELSIF .....

> END IF ;

> 

> Once the sql statement is created, it will be opened/closed 

> multiple times, so I want to use bind

> variables to avoid parsing.

> 

> So I thought, hum, sounds like a job for EXECUTE IMMEDIATE, 

> but in the various incarnations I tried,

> could not get it to work.  The FM have not been much help 

> (still looking tho).

> 

> What am I missing?

> 

> Thanks,

> Ron Thomas

> Hypercom, Inc

> rthomas_at_hypercom.com

> Each new user of a new system uncovers a new class of bugs. 

> -- Kernighan

> 

> -- 

> Please see the official ORACLE-L FAQ: http://www.orafaq.com

> -- 

> Author: Ron Thomas

>   INET: rthomas_at_hypercom.com

> 

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