From ddd49bfbf28a597e0dfbb5547566a1f6ef908287 Mon Sep 17 00:00:00 2001
From: Lukas Eder <lukas.eder@gmail.com>
Date: Thu, 24 Sep 2020 12:23:35 +0200
Subject: [PATCH] [jOOQ/jOOQ#7312] Don't mutate input expression tree in
 transformation!

---
 jOOQ/src/main/java/org/jooq/impl/CombinedCondition.java | 2 ++
 jOOQ/src/main/java/org/jooq/impl/SelectQueryImpl.java   | 9 ++++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/jOOQ/src/main/java/org/jooq/impl/CombinedCondition.java b/jOOQ/src/main/java/org/jooq/impl/CombinedCondition.java
index 1c0b15258b..d4e4fb1747 100644
--- a/jOOQ/src/main/java/org/jooq/impl/CombinedCondition.java
+++ b/jOOQ/src/main/java/org/jooq/impl/CombinedCondition.java
@@ -143,6 +143,8 @@ final class CombinedCondition extends AbstractCondition {
 
         if (newList == null)
             return this;
+        else if (newList.isEmpty())
+            return noCondition();
         else
             return of(operator, newList);
     }
diff --git a/jOOQ/src/main/java/org/jooq/impl/SelectQueryImpl.java b/jOOQ/src/main/java/org/jooq/impl/SelectQueryImpl.java
index 77eac3d8ab..43e52692f6 100644
--- a/jOOQ/src/main/java/org/jooq/impl/SelectQueryImpl.java
+++ b/jOOQ/src/main/java/org/jooq/impl/SelectQueryImpl.java
@@ -180,7 +180,6 @@ import java.util.Arrays;
 import java.util.Collection;
 import java.util.Deque;
 import java.util.EnumSet;
-import java.util.Iterator;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
@@ -2504,6 +2503,14 @@ final class SelectQueryImpl<R extends Record> extends AbstractResultQuery<R> imp
 
 
 
+
+
+
+
+
+
+
+