From 854a70fd2c9e5865c302ac45378f4c93a1c8ca37 Mon Sep 17 00:00:00 2001
From: lukaseder <lukas.eder@gmail.com>
Date: Fri, 1 Apr 2016 13:21:00 +0200
Subject: [PATCH] [#5182] Meta Table.getKeys() returns an empty list containing
 null, if a table has no primary key

---
 jOOQ/src/main/java/org/jooq/impl/MetaImpl.java | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/jOOQ/src/main/java/org/jooq/impl/MetaImpl.java b/jOOQ/src/main/java/org/jooq/impl/MetaImpl.java
index eb7adc1e1c..e716160a3e 100644
--- a/jOOQ/src/main/java/org/jooq/impl/MetaImpl.java
+++ b/jOOQ/src/main/java/org/jooq/impl/MetaImpl.java
@@ -81,7 +81,8 @@
 package org.jooq.impl;
 
 import static java.util.Arrays.asList;
-import static java.util.Collections.unmodifiableList;
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
 // ...
 import static org.jooq.SQLDialect.MARIADB;
 import static org.jooq.SQLDialect.MYSQL;
@@ -493,7 +494,8 @@ final class MetaImpl implements Meta, Serializable {
 
         @Override
         public final List<UniqueKey<Record>> getKeys() {
-            return unmodifiableList(asList(getPrimaryKey()));
+            UniqueKey<Record> pk = getPrimaryKey();
+            return pk == null ? emptyList() : singletonList(pk);
         }
 
         @Override