Do not try to set invalid value for guc

We don't support subtransactions and hence can't handle exception thrown by
trying to set invalid value. We'd already removed the exception, but the
transaction was being left in an aborted state. So fix this.

The test case still fails for some other reason which should be investigated
separately.

2 files changed, 8 insertions, 8 deletions

diff --git a/src/test/regress/expected/select_parallel.out b/src/test/regress/expected/select_parallel.out
index 4392a3ada3..ef57a7a7e2 100644
--- a/src/test/regress/expected/select_parallel.out
+++ b/src/test/regress/expected/select_parallel.out
@@ -201,10 +201,10 @@ set enable_hashjoin to off;
 set enable_mergejoin to off;
 set enable_material to off;
 -- test prefetching, if the platform allows it
-DO $$
-BEGIN
- SET effective_io_concurrency = 50;
-END $$;
+--DO $$
+--BEGIN
+-- SET effective_io_concurrency = 50;
+--END $$;
 set work_mem='64kB';  --set small work mem to force lossy pages
 explain (costs off)
 	select count(*) from tenk1, tenk2 where tenk1.hundred > 1 and tenk2.thousand=0;
diff --git a/src/test/regress/sql/select_parallel.sql b/src/test/regress/sql/select_parallel.sql
index cbc94ac89f..4474df6925 100644
--- a/src/test/regress/sql/select_parallel.sql
+++ b/src/test/regress/sql/select_parallel.sql
@@ -75,10 +75,10 @@ set enable_hashjoin to off;
 set enable_mergejoin to off;
 set enable_material to off;
 -- test prefetching, if the platform allows it
-DO $$
-BEGIN
- SET effective_io_concurrency = 50;
-END $$;
+--DO $$
+--BEGIN
+-- SET effective_io_concurrency = 50;
+--END $$;
 set work_mem='64kB';  --set small work mem to force lossy pages
 explain (costs off)
 	select count(*) from tenk1, tenk2 where tenk1.hundred > 1 and tenk2.thousand=0;