Small improvement for plpgsql regression test.

Use DISCARD PLANS instead of a reconnect to force reconstruction of
a cached plan; this corresponds more nearly to what people might
actually do in practice.

2 files changed, 9 insertions, 4 deletions

diff --git a/src/pl/plpgsql/src/expected/plpgsql_record.out b/src/pl/plpgsql/src/expected/plpgsql_record.out
index 29e42fda6c1..6ea88b3de02 100644
--- a/src/pl/plpgsql/src/expected/plpgsql_record.out
+++ b/src/pl/plpgsql/src/expected/plpgsql_record.out
@@ -424,9 +424,11 @@ select sillyaddone(42);
 alter table mutable drop column f1;
 alter table mutable add column f1 float8;
 -- currently, this fails due to cached plan for "r.f1 + 1" expression
+-- (but we can't actually show that, because a CLOBBER_CACHE_ALWAYS build
+-- will succeed)
 -- select sillyaddone(42);
-\c -
--- but it's OK after a reconnect
+-- but it's OK if we force plan rebuilding
+discard plans;
 select sillyaddone(42);
  sillyaddone 
 -------------
diff --git a/src/pl/plpgsql/src/sql/plpgsql_record.sql b/src/pl/plpgsql/src/sql/plpgsql_record.sql
index 781ccb0ccb5..aba68879948 100644
--- a/src/pl/plpgsql/src/sql/plpgsql_record.sql
+++ b/src/pl/plpgsql/src/sql/plpgsql_record.sql
@@ -274,9 +274,12 @@ alter table mutable drop column f1;
 alter table mutable add column f1 float8;
 
 -- currently, this fails due to cached plan for "r.f1 + 1" expression
+-- (but we can't actually show that, because a CLOBBER_CACHE_ALWAYS build
+-- will succeed)
 -- select sillyaddone(42);
-\c -
--- but it's OK after a reconnect
+
+-- but it's OK if we force plan rebuilding
+discard plans;
 select sillyaddone(42);
 
 alter table mutable drop column f1;