diff --git a/.github/workflows/scripts/gtest_filter_negative b/.github/workflows/scripts/gtest_filter_negative
index 744558eb00..b20aa7fa5a 100644
--- a/.github/workflows/scripts/gtest_filter_negative
+++ b/.github/workflows/scripts/gtest_filter_negative
@@ -14,7 +14,6 @@
 # limitations under the License.
 
 export GTEST_FILTER_NEGATIVE=\
-TestErrorTable.TestErrorTableAll:\
 TestCommonLib.TestHdfsConfig:\
 TestExtOrc.TestNormalPath:\
 TestExtOrc.BoolTypeTest:\
diff --git a/src/backend/access/external/url.c b/src/backend/access/external/url.c
index 7aadc95401..e4bbddf62a 100644
--- a/src/backend/access/external/url.c
+++ b/src/backend/access/external/url.c
@@ -361,13 +361,13 @@ fill_buffer(URL_FILE *file, int want)
 						e, curl_easy_strerror(e));
 		}
 
-		if (maxfd <= 0)
+		if (maxfd == -1)
 		{
-			curl->still_running = 0;
-			break;
+			/* fall through to curl_multi_perform directly */
+			pg_usleep(100);
+			nfds = 1;
 		}
-
-        if (-1 == (nfds = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout)))
+		else if (-1 == (nfds = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout)))
 		{
 			if (errno == EINTR || errno == EAGAIN)
 				continue;
diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y
index 4dbfcb2ac7..6650841620 100755
--- a/src/backend/parser/gram.y
+++ b/src/backend/parser/gram.y
@@ -4707,7 +4707,7 @@ CreateExternalStmt:	CREATE OptWritable EXTERNAL OptWeb OptTemp TABLE qualified_n
 
 OptWritable:	WRITABLE				{ $$ = TRUE; }
 				| READABLE				{ $$ = FALSE; }
-				| /*EMPTY*/				{ $$ = TRUE; }
+				| /*EMPTY*/				{ $$ = FALSE; }
 				;
 
 OptWeb:		WEB						{ $$ = TRUE; }