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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2014-11-25 12:21:22 -0500 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2014-11-25 12:21:28 -0500 |
| commit | bac27394a1c69c20ec904729c593e59485c75c69 (patch) | |
| tree | 7bdf15b078bfcef745a5bb2c7c479d6f8bd45f15 /src/backend/optimizer | |
| parent | 25976710dfd8611d3fc79c0c1e20179ff7a940ec (diff) | |
| download | postgresql-bac27394a1c69c20ec904729c593e59485c75c69.tar.gz postgresql-bac27394a1c69c20ec904729c593e59485c75c69.zip | |
Support arrays as input to array_agg() and ARRAY(SELECT ...).
These cases formerly failed with errors about "could not find array type
for data type". Now they yield arrays of the same element type and one
higher dimension.
The implementation involves creating functions with API similar to the
existing accumArrayResult() family. I (tgl) also extended the base family
by adding an initArrayResult() function, which allows callers to avoid
special-casing the zero-inputs case if they just want an empty array as
result. (Not all do, so the previous calling convention remains valid.)
This allowed simplifying some existing code in xml.c and plperl.c.
Ali Akbar, reviewed by Pavel Stehule, significantly modified by me
Diffstat (limited to 'src/backend/optimizer')
| -rw-r--r-- | src/backend/optimizer/plan/subselect.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/backend/optimizer/plan/subselect.c b/src/backend/optimizer/plan/subselect.c index 42b6d0a2cb9..579d021893c 100644 --- a/src/backend/optimizer/plan/subselect.c +++ b/src/backend/optimizer/plan/subselect.c @@ -668,7 +668,7 @@ build_subplan(PlannerInfo *root, Plan *plan, PlannerInfo *subroot, Assert(!te->resjunk); Assert(testexpr == NULL); - arraytype = get_array_type(exprType((Node *) te->expr)); + arraytype = get_promoted_array_type(exprType((Node *) te->expr)); if (!OidIsValid(arraytype)) elog(ERROR, "could not find array type for datatype %s", format_type_be(exprType((Node *) te->expr))); |