PIG-5389: Passing null to REPLACE udf preventing JIT optimization (knoguchi)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1862503 13f79535-47bb-0310-9956-ffa450edef68

Author: Koji Noguchi

CHANGES.txt

@@ -26,6 +26,8 @@ PIG-5282: Upgade to Java 8 (satishsaley via rohini)
 
 IMPROVEMENTS
 
+PIG-5389: Passing null to REPLACE udf preventing JIT optimization (knoguchi)
+
 PIG-5382: Log the name when POStore fails on write (knoguchi)
 
 PIG-5255: Improvements to bloom join (satishsaley via rohini)

src/org/apache/pig/builtin/REPLACE.java

@@ -58,6 +58,10 @@ public String exec(Tuple input) throws IOException {
         String source = (String)input.get(0);
         String target = (String)input.get(1);
 
+        if (source == null) {
+            return null;
+        }
+
         if (target == null) {
             warn("Replace : Regular expression is null", PigWarning.UDF_WARNING_1);
             return null;