#1926 - Postgres (Multi value bind) fix related to empty idIn() expression

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

@@ -123,7 +123,7 @@ public class IdInExpression extends NonPrepareExpression {
   @Override
   public void queryPlanHash(StringBuilder builder) {
     builder.append("IdIn[?");
-    if (!multiValueIdSupported) {
+    if (!multiValueIdSupported || idCollection.isEmpty()) {
       // query plan specific to the number of parameters in the IN clause
       builder.append(idCollection.size());
     }

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

@@ -17,8 +17,6 @@ import java.util.List;
 
 class InExpression extends AbstractExpression {
 
-
-
   private final boolean not;
 
   /**
@@ -169,7 +167,7 @@ class InExpression extends AbstractExpression {
       builder.append("empty");
     } else {
       builder.append(" ?");
-      if (!multiValueSupported) {
+      if (!multiValueSupported || bindValues.isEmpty()) {
         // query plan specific to the number of parameters in the IN clause
         builder.append(bindValues.size());
       }

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

@@ -116,7 +116,7 @@ class InPairsExpression extends AbstractExpression {
     builder.append(property1).append("-");
     builder.append(separator).append("-");
     builder.append(suffix).append(" ?");
-    if (!multiValueSupported) {
+    if (!multiValueSupported || entries.isEmpty()) {
       // query plan specific to the number of parameters in the IN clause
       builder.append(entries.size());
     }