Dear colleagues,
I'm trying to train a Support Vector Machine on a table with schema flexibility.
On a small test table with only a couple of columns both the training and the prediction using the PAL libraries work fine. However, on my large sparse table with more than 1000 columns and "schema flexibility" set at creation time, I constantly run into the following error:
Could not execute 'CALL SYSTEM.AFL_WRAPPER_GENERATOR ('PAL_SV', 'AFLPAL', 'SVMTRAIN', PAL_SV_SIGNATURE)' in 30 ms 529 µs .
SAP DBTech JDBC: [423]: AFL error: [423] "SYSTEM"."AFL_WRAPPER_GENERATOR": line 32 col 1 (at pos 1346): [423] (range 3) AFL error exception: AFL error: registration finished with errors, see indexserver trace
The indexserver trace gives me something strange like:
AFLPM_SQLDriverObj.cpp(02439) : aflpm_creator : direction must be in or out
As far as I see it, all parameters are fine, though.
Is there a limitation that does not allow PAL functions to be executed on tables with schema flexibility? I suspect so, because I'm running into similar problems with the SUBSTITUTE_MISSING_VALUES function.
Thanks for any help,
Daniel