2011/6/24 Shigeru Hanada <shigeru.han...@gmail.com> > (2011/06/24 15:35), HuangQi wrote: > > Hi, > > I'm trying to debug a modification for the query planner. But I found > it > > seems the data structure of my planned query is incorrect. I was trying > to > > print out the data structure by use the "p" command in gdb which is quite > > inconvenient and takes time. May I know is there any embedded function in > > postgres to print out the node data structures, or any other plan related > > data structures? Thanks. > > I think nodeToString() would help. This function converts node tree > recursively into a string, and it's applicable for any Node-derived > object, such as Expr, Var and Const. > > ex) > elog(DEBUG1, "%s", nodeToString(plan)); > > Regards, > -- > Shigeru Hanada >
Hi, I don't know why but when I am debugging the query evaluation, the elog function can not output to shell. -- Best Regards Huang Qi Victor
