My program (indirectly) calls the following function twice,
tuple = SearchSysCache(STATRELATT, ObjectIdGetDatum(relid),
Int16GetDatum(colnum), 0, 0);
The first time it assigns NULL to tuple, while the second time it
assigns a valid pointer. Why is it like that? BTW, my program only
optimize query plan without executing it.
Thanks.
---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
