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Allow RECORD and RECORD[] to be specified in function coldeflists.

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We can't allow these pseudo-types to be used as table column types,
because storing an anonymous record value in a table would result
in data that couldn't be understood by other sessions.  However,
it seems like there's no harm in allowing the case in a column
definition list that's specifying what a function-returning-record
returns.  The data involved is all local to the current session,
so we should be just as able to resolve its actual tuple type as
we are for the function-returning-record's top-level tuple output.

Elvis Pranskevichus, with cosmetic changes by me

Discussion: https://postgr.es/m/11038447.kQ5A9Uj5xi@hammer.magicstack.net
This commit is contained in:
Tom Lane
2019-01-30 19:25:33 -05:00
parent 689d15e95e
commit 5f5c014590
7 changed files with 70 additions and 19 deletions
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11
src/test/regress/expected/rowtypes.out
View File

@ -667,6 +667,17 @@ select row(1, '(1,2)')::testtype6 *<> row(1, '(1,3)')::testtype6;
t
(1 row)
-- anonymous rowtypes in coldeflists
select q.a, q.b = row(2), q.c = array[row(3)], q.d = row(row(4)) from
unnest(array[row(1, row(2), array[row(3)], row(row(4))),
row(2, row(3), array[row(4)], row(row(5)))])
as q(a int, b record, c record[], d record);
a | ?column? | ?column? | ?column?
---+----------+----------+----------
1 | t | t | t
2 | f | f | f
(2 rows)
drop type testtype1, testtype2, testtype3, testtype4, testtype5, testtype6;
--
-- Test case derived from bug #5716: check multiple uses of a rowtype result

6
src/test/regress/sql/rowtypes.sql
View File

@ -259,6 +259,12 @@ select row(1, '(1,2)')::testtype6 *< row(1, '(1,3)')::testtype6;
select row(1, '(1,2)')::testtype6 *>= row(1, '(1,3)')::testtype6;
select row(1, '(1,2)')::testtype6 *<> row(1, '(1,3)')::testtype6;
-- anonymous rowtypes in coldeflists
select q.a, q.b = row(2), q.c = array[row(3)], q.d = row(row(4)) from
unnest(array[row(1, row(2), array[row(3)], row(row(4))),
row(2, row(3), array[row(4)], row(row(5)))])
as q(a int, b record, c record[], d record);
drop type testtype1, testtype2, testtype3, testtype4, testtype5, testtype6;