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In plpgsql, don't try to convert int2vector or oidvector to expanded array.

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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: <20160818174414.1529.37913@wrigleys.postgresql.org>
This commit is contained in:
Tom Lane 2016-08-18 14:48:51 -04:00
parent 191d45793d
commit c81c71d884
2 changed files with 8 additions and 3 deletions
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2
src/include/utils/array.h
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@ -36,7 +36,7 @@
*
* The OIDVECTOR and INT2VECTOR datatypes are storage-compatible with
* generic arrays, but they support only one-dimensional arrays with no
* nulls (and no null bitmap).
* nulls (and no null bitmap). They don't support being toasted, either.
*
* There are also some "fixed-length array" datatypes, such as NAME and
* POINT. These are simply a sequence of a fixed number of items each

9
src/pl/plpgsql/src/pl_comp.c
View File

@ -2192,14 +2192,19 @@ build_datatype(HeapTuple typeTup, int32 typmod, Oid collation)
/* NB: this is only used to decide whether to apply expand_array */
if (typeStruct->typtype == TYPTYPE_BASE)
{
/* this test should match what get_element_type() checks */
/*
* This test should include what get_element_type() checks. We also
* disallow non-toastable array types (i.e. oidvector and int2vector).
*/
typ->typisarray = (typeStruct->typlen == -1 &&
OidIsValid(typeStruct->typelem));
OidIsValid(typeStruct->typelem) &&
typeStruct->typstorage != 'p');
}
else if (typeStruct->typtype == TYPTYPE_DOMAIN)
{
/* we can short-circuit looking up base types if it's not varlena */
typ->typisarray = (typeStruct->typlen == -1 &&
typeStruct->typstorage != 'p' &&
OidIsValid(get_base_element_type(typeStruct->typbasetype)));
}
else