From ac5021245d83bfd6621570d30f04db4d1acce0a2 Mon Sep 17 00:00:00 2001
From: Jenny Tam <v-yitam@microsoft.com>
Date: Mon, 19 Aug 2019 16:56:35 -0700
Subject: [PATCH] Used while loop for fetchColumn

---
 test/functional/pdo_sqlsrv/PDO81_MemoryCheck.phpt | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/test/functional/pdo_sqlsrv/PDO81_MemoryCheck.phpt b/test/functional/pdo_sqlsrv/PDO81_MemoryCheck.phpt
index 42919b193..1153d6ac4 100644
--- a/test/functional/pdo_sqlsrv/PDO81_MemoryCheck.phpt
+++ b/test/functional/pdo_sqlsrv/PDO81_MemoryCheck.phpt
@@ -244,9 +244,11 @@ function RunTest($noPasses, $noRows, $tableName, $conn, $prepared, $mode)
             case 6:     // fetchColumn
                 $stmt = ExecuteQueryEx($conn, $tsql, ($prepared ? false : true));
                 $fldCount = $stmt->columnCount();
-                $result = $stmt->fetchColumn();
-                $rowCount = count($result);
-                unset($result);
+                // Check for "false" to terminate because fetchColumn may return NULL
+                while (($result = $stmt->fetchColumn()) !== false) {
+                    unset($result);
+                    $rowCount++;
+                }
                 $stmt->closeCursor();
                 unset($stmt);
                 if ($rowCount != $noRows) {