Re: Egads! An area in which the precompiler people surpassed the compiler people!

[Gina M Whitney <whitneyg@xxxxxxxxxx>]

rob@xxxxxxxxx wrote:
 The SQL  SET OPTION is SQL's version of the H spec.

 For example:
      C/EXEC SQL
      C+ Set Option
      C+     Naming    = *Sys,
      C+     Commit    = *None,
      C+     UsrPrf    = *User,
      C+     DynUsrPrf = *User,
      C+     CloSqlCsr = *EndMod
      C/END-EXEC

 Here's something you can do in a SET OPTION that you cannot do on an H
 spec.  Why?
      C/EXEC SQL
      C+ Set Option
      C+     TgtRls = V5R1M0
      C/END-EXEC

 Rob Berendt

Hans wrote:
Will wonders never cease, eh?

I don't know how the SQL prep works, but generally, the RPG command
options that you can't code on the H-Spec are disallowed there
because we're already knee deep into the compile already. In
particular, when you specify a different release on the CRTBNDRPG or
CRTRPGMOD command, a completely different program is invoked to
compile the source code. Since the H-Spec's are compiled by that
source code, it's meaningless to specify which version to use on the
H-Spec.

I suppose when the H-Spec parsing sees that a different compiler
version is requested, we could abandon the compile and tell the
command to invoke a different version of compiler. But then, how
would the compiler handle the following H-Specs:

H/if defined(*V5R2M0)
H   TGTRLS(*V5R1M0)
H/elseif defined(*V5R1M0)
H   TGTRLS(*V5R2M0)
H/endif
H*         ;-)

Cheers! Hans

=-=-=-=-=-=-=-=-=-=-=--=-
The SQL precompiler calls the same programs no matter the target release.
Since the SET OPTION statement must precede any other SQL statement,
setting the target release is allowed.   The precompiler calls the compiler
by generating a CRTBNDRPG or CRTRPGMOD command using the options specified
on the command and in the SET OPTION statement.  Therefore the compiler
knows the correct version before it gets deep into the compile.

In an upcoming release, watch for a new option in the SET OPTION statement.
I think you'll find it useful.

Gina