Re: How do I get SQL decimal scale in MAL?

I second that! Are you sure that you cannot come up with an alternative algorithm for your aggregation that does not need this information (and possibly be faster) ? On Sat, Nov 9, 2013 at 11:26 AM, Stefan Manegold wrote:

Hi Dru,

the decimal scale information is only maintained in the SQL catalog and given that decimals are stored as integers in MonetDB, neither the MonetDB kernel, nor MAL usually need to know about decimals or their scale.

Hence, the question is, whether/why your aggregate functions would need to know about decimals or their scale?

Best, Stefan

Dru Nelson wrote:

...

HI,

I"m working on writing an aggregate in in C that is a MAL function. I've run into a problem with decimal types.

I've noticed that when I inspect the BAT inputs for various types, they are coerced to simpler types. (flt,dbl -> dbl). (int, decimal -> int). There is also no other information in the BAT structure to see the type.

I notice that a SQL select gets the type info passed in as parameters for the 'exportValue' output.

For example:

...

sql.exportValue(1,".","second_single_value","decimal",9,3,8,_4,"");

How can I get this type information ('decimal', etc.) passed into my function?

Dru

________________________________

developers-list mailing list developers-list@monetdb.org https://www.monetdb.org/mailman/listinfo/developers-list

-- | Stefan.Manegold@CWI.nl | Database Architectures (DA) | | www.CWI.nl/~manegold | Science Park 123 (L321) | | +31 (0)20 592-4212 | 1098 XG Amsterdam (NL) |

_______________________________________________ developers-list mailing list developers-list@monetdb.org https://www.monetdb.org/mailman/listinfo/developers-list