From 07fc49aac01473cbd1534eef21a5ea15b001674b Mon Sep 17 00:00:00 2001
From: Michelle Thomas <michelle.q.thomas@gmail.com>
Date: Fri, 11 May 2018 14:24:23 -0700
Subject: [PATCH] Allowing sqlExpression to be blank

---
 superset/assets/src/explore/AdhocFilter.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/superset/assets/src/explore/AdhocFilter.js b/superset/assets/src/explore/AdhocFilter.js
index 0c84ef55a96c6..ba9651528c3d7 100644
--- a/superset/assets/src/explore/AdhocFilter.js
+++ b/superset/assets/src/explore/AdhocFilter.js
@@ -45,7 +45,8 @@ export default class AdhocFilter {
       this.clause = adhocFilter.clause;
       this.sqlExpression = null;
     } else if (this.expressionType === EXPRESSION_TYPES.SQL) {
-      this.sqlExpression = adhocFilter.sqlExpression ||
+      this.sqlExpression = typeof adhocFilter.sqlExpression === 'string' ?
+        adhocFilter.sqlExpression :
         translateToSql(adhocFilter, { useSimple: true });
       this.clause = adhocFilter.clause;
       this.subject = null;