Re: Progress report: intraquery memory recovery in executor

> What I'm currently considering instead is to still create a per-tuple
> context for each plan node, but use it only for expression evaluation,
> ie, we switch into it on entry to ExecQual(), ExecTargetList(),
> ExecProject(), maybe a few other places.  The majority of our leakage
> problems are associated with expression evaluation, so this should allow
> fixing the leakage problems.  It will mean that routines associated with
> plan nodes (basically, executor/node*.c) will still need to be careful
> to avoid leaks.  For the most part they are already, but I had hoped to
> make that care less necessary.

I was wondering how you were going to pull this off.  It seems doing
something on entry to the expression routines is best.

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