In plpgsql, don't try to convert int2vector or oidvector to expanded array.
These types are storage-compatible with real arrays, but they don't support
toasting, so of course they can't support expansion either.
Per bug #14289 from Michael Overmeyer. Back-patch to 9.5 where expanded
arrays were introduced.
Report: <20160818174414(dot)1529(dot)37913(at)wrigleys(dot)postgresql(dot)org>
Branch
------
REL9_5_STABLE
Details
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http://git.postgresql.org/pg/commitdiff/a8fc1950520985f321d4d07da9b1c633c0addd97
Modified Files
--------------
src/include/utils/array.h | 2 +-
src/pl/plpgsql/src/pl_comp.c | 9 +++++++--
2 files changed, 8 insertions(+), 3 deletions(-)