(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.
