Adding additional logging to ExprMissingValue exception

legacy/src/main/java/com/amazon/opendistroforelasticsearch/sql/legacy/expression/domain/BindingTuple.java

@@ -46,7 +46,7 @@ public class BindingTuple {
      * @return binding value.
      */
     public ExprValue resolve(String bindingName) {
-        return bindingMap.getOrDefault(bindingName, new ExprMissingValue());
+        return bindingMap.getOrDefault(bindingName, new ExprMissingValue(bindingName, bindingMap.keySet()));
     }
 
     @Override

legacy/src/main/java/com/amazon/opendistroforelasticsearch/sql/legacy/expression/model/ExprMissingValue.java

@@ -15,10 +15,25 @@
 
 package com.amazon.opendistroforelasticsearch.sql.legacy.expression.model;
 
+import java.util.Set;
+
 /**
  * The definition of the missing value.
  */
 public class ExprMissingValue implements ExprValue {
+    private final String missingValue;
+    private final Set<String> availableValues;
+
+    public ExprMissingValue(String missingValue, Set<String> availableValues) {
+        this.missingValue = missingValue;
+        this.availableValues = availableValues;
+    }
+
+    @Override
+    public Object value() {
+        throw new IllegalStateException("invalid value operation on " + kind() + " (" + this.missingValue + "), available: " + this.availableValues.toString());
+    }
+
     @Override
     public ExprValueKind kind() {
         return ExprValueKind.MISSING_VALUE;