Re: how solve diff of API counstruct_md_array between

Martijn van Oosterhout wrote:
> On Thu, Feb 16, 2006 at 08:36:34PM +0100, Pavel Stehule wrote:
>>I use counstruct_md_array function in my Orafunc module. CVS version has 
>>diff def now. I am findig way for simple solution of maintaince source code 
>>for both version. I have PG_VERSION variable, but it's unusable. Is there 
>>way for contrib's autors differentiate PostgreSQL versions? I don't want to 
>>have two versions of source code.
> 
> For my stuff I've generally use CATALOG_VERSION_NO. It's not very easy,
> but by looking through CVS you can find when the function was created
> and in your code use:
> 
> #ifdef CATALOG_VERSION_NO > yyyymmddN
> /* New stuff */
> #else
> /* Old stuff */
> #endif

I do pretty much the same thing in PL/R. The good news is that 
CATALOG_VERSION_NO doesn't change for each major release once it is 
released. The following hasn't been updated since the 8.1 release, but 
you could use it as a starting point:

#if (CATALOG_VERSION_NO <= 200211021)
#define PG_VERSION_73_COMPAT
#elif (CATALOG_VERSION_NO <= 200310211)
#define PG_VERSION_74_COMPAT
#elif (CATALOG_VERSION_NO <= 200411041)
#define PG_VERSION_80_COMPAT
#else
#define PG_VERSION_81_COMPAT
#endif

HTH,

Joe