pgsql: Make _outPathInfo print the relid set of the path's parent rel.

Make _outPathInfo print the relid set of the path's parent rel.

We can't actually print the parent RelOptInfo in toto, because that would
lead to infinite recursion.  But it's safe enough to reach into the parent
and print its identifying relids, and that makes it a whole lot easier
to figure out what a Path represents.  Should have done this years ago.

Branch
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master

Details
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http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=003788e81e7f72bc545b509e1517a672d891273b

Modified Files
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src/backend/nodes/outfuncs.c |    5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)