Re: [HACKERS] aggregation memory leak and fix

> Yes, if you look inside ExecEvalExpr(), you will see it tries to get a
> value for the expression(Datum).  It may return an int, float4, or a
> string.  In the last case, that is actually a pointer and not a specific
> value.
> 
> So, in some cases, the value can just be thrown away, or it may be a
> pointer to memory that can be freed after the call to heap_formtuple()
> later in the function.  The trick is to find the function call in
> ExecEvalExpr() that is allocating something, and conditionally free
> values[] after the call to heap_formtuple().  If you don't want find it,
> perhaps you can send me enough info so I can see it here.
> 
> I wonder whether it is the call to CreateTupleDescCopy() inside
> ExecEvalVar()?

I am now not totally sure about what I said above.  The general plan,
though is accurate, that perhaps something is being allocated.  I need
to see the query again, which I don't have anymore.

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