Re: Is this a memory leak in libpqrcv_processTuples()?

Hi Chao,

As you mentioned, attinmeta will be automatically freed when the memory
context is destroyed. If our concern here is that repeated calls to
walrcv_exec in some section of the code are causing a large number of
attinmeta objects to remain unreleased(I’m not sure if anyone would use
walrcv_exec to do something like this), this would seem to imply that we
are repeatedly constructing identical attinmeta instances – for example:

*while (loop_condition) { sprintf(query, "xxx where xx = %d", index++);
res = walrcv_exec(conn, query, ...);}*

It is rare to encounter a scenario where walrcv_exec is called multiple
times and each invocation uses a query with different attrs. Therefore, if
this loop scenario is indeed the case, should we consider avoiding the
repeated construction of tupdesc/attinmeta?