diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/binary/concat2/concat2.1.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/binary/concat2/concat2.1.query.sqlpp
new file mode 100644
index 0000000..782cce2
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/binary/concat2/concat2.1.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+{
+  't1': binary_concat([null,hex('aa')]),
+  't2': binary_concat([hex('aa'),null]),
+  't3': binary_concat([null,missing,hex('aa')]),
+  't4': binary_concat([hex('aa'),null,missing])
+};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/string-concat2/string-concat2.1.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/string-concat2/string-concat2.1.query.sqlpp
new file mode 100644
index 0000000..3e48631
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/string-concat2/string-concat2.1.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+{
+  't1': string_concat([null,'aa']),
+  't2': string_concat(['aa',null]),
+  't3': string_concat([null,missing,'aa']),
+  't4': string_concat(['aa',null,missing])
+};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/string-concat2/string-concat2.2.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/string-concat2/string-concat2.2.query.sqlpp
new file mode 100644
index 0000000..12208a7
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/string/string-concat2/string-concat2.2.query.sqlpp
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+{
+  't1': null || 'aa',
+  't2': 'aa' || null,
+  't3': null || missing || 'aa',
+  't4': 'aa' || null || missing
+};
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/binary/concat2/concat2.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/binary/concat2/concat2.1.adm
new file mode 100644
index 0000000..770f2cd
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/binary/concat2/concat2.1.adm
@@ -0,0 +1 @@
+{ "t1": null, "t2": null }
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/string/string-concat2/string-concat2.1.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/string/string-concat2/string-concat2.1.adm
new file mode 100644
index 0000000..770f2cd
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/string/string-concat2/string-concat2.1.adm
@@ -0,0 +1 @@
+{ "t1": null, "t2": null }
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/string/string-concat2/string-concat2.2.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/string/string-concat2/string-concat2.2.adm
new file mode 100644
index 0000000..770f2cd
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/string/string-concat2/string-concat2.2.adm
@@ -0,0 +1 @@
+{ "t1": null, "t2": null }
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml b/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml
index 904dc61..04b484e 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml
@@ -6619,6 +6619,11 @@
       </compilation-unit>
     </test-case>
     <test-case FilePath="string">
+      <compilation-unit name="string-concat2">
+        <output-dir compare="Text">string-concat2</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="string">
       <compilation-unit name="string-equal1">
         <output-dir compare="Text">string-equal1</output-dir>
       </compilation-unit>
@@ -9837,6 +9842,11 @@
       </compilation-unit>
     </test-case>
     <test-case FilePath="binary">
+      <compilation-unit name="concat2">
+        <output-dir compare="Text">concat2</output-dir>
+      </compilation-unit>
+    </test-case>
+    <test-case FilePath="binary">
       <compilation-unit name="subbinary">
         <output-dir compare="Text">subbinary</output-dir>
       </compilation-unit>