citusdata / citusdata/citus

Using system column in local-distributed table joins gives error

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bug dev_reported warm-up
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Description

When using a system column (e.g. xmin, xmax, ctid) in a local-distributed table join, we get the following error:
```
select local.xmax from test join local using (x);
ERROR: could not find attribute -4 in subquery targetlist
```

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