[SCIP] the (default?) variable pricer

[myroslav]

Dear SCIP community,


I had a question regarding the variable pricer (see 
http://scip.zib.de/doc/html/FAQ.php#variablepricer). If I understood it 
correctly, it prices variables that have been added to scip but are not 
in the current(some node in the branching tree) relaxation? What if I 
know a smarter, problem specific pricing algorithm, how can I make the 
variable pricer use this algorithm?


Also I had a question regarding SCIPcreateVar() parameter initial. I 
flagged my variables as not-initial(passed false when creating a 
variable) and when I do my custom branching in SCIP_DECL_BRANCHEXECLP 
the first time it executes, which is, I guess, the root node, I see that 
all the columns obtained using SCIPgetNLPCols() are already in the LP. 
But how could that happen if all the variables were flagged as not-initial?


Thanks,

Myroslav