#1489 - removed the concat-operator "||" and replaced with "concat()"

src/main/java/io/ebeaninternal/server/expression/InPairsExpression.java

@@ -92,11 +92,6 @@ class InPairsExpression extends AbstractExpression {
       return;
     }
 
-
-    StringBuilder sb = new StringBuilder();
-
-    request.getDbPlatformHandler().concat(property0, separator, property1, suffix);
-
     request.append(request.getDbPlatformHandler().concat(property0, separator, property1, suffix));
     request.appendInExpression(not, concatBindValues);
   }

src/main/java/io/ebeaninternal/server/expression/platform/BaseDbExpression.java

@@ -49,8 +49,7 @@ abstract class BaseDbExpression implements DbExpressionHandler {
   @Override
   public String concat(String property0, String separator, String property1, String suffix) {
     StringBuilder sb = new StringBuilder();
-    sb.append("CONCAT(").append(property0).append(",'").append(separator).append("',").append(property1);
-
+    sb.append("concat(").append(property0).append(",'").append(separator).append("',").append(property1);
     if (suffix != null && !suffix.isEmpty()) {
       sb.append(",'").append(suffix).append('\'');
     }