[YSQL] Output the result of COMMIT or ROLLBACK

Jira Link: DB-19783

Description

Better to output the result of COMMIT instead of repeating the command since that correctly checks that the txn committed or rolled back.

Here's the code change expected

 $ git diff -- src/postgres/src/test/isolation/isolationtester.c
diff --git a/src/postgres/src/test/isolation/isolationtester.c b/src/postgres/src/test/isolation/isolationtester.c
index dd53d8b0e5..10a788c988 100644
--- a/src/postgres/src/test/isolation/isolationtester.c
+++ b/src/postgres/src/test/isolation/isolationtester.c
@@ -1079,6 +1079,8 @@ try_complete_step(TestSpec *testspec, PermutationStep *pstep, int flags)
                switch (PQresultStatus(res))
                {
                        case PGRES_COMMAND_OK:
+                               printf("%s\n", PQcmdStatus(res));
+                               break;
                        case PGRES_EMPTY_QUERY:
                                break;
                        case PGRES_TUPLES_OK:

Issue Type

kind/bug

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