From 53528b3e86f2a2139af62c024a8a6af2968622f2 Mon Sep 17 00:00:00 2001
From: Lukas Eder <lukas.eder@gmail.com>
Date: Tue, 7 Sep 2021 13:14:15 +0200
Subject: [PATCH] [jOOQ/jOOQ#12210] Aliasing implicit join paths produces
 invalid queries

---
 .../main/java/org/jooq/impl/TableImpl.java    | 21 ++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/jOOQ/src/main/java/org/jooq/impl/TableImpl.java b/jOOQ/src/main/java/org/jooq/impl/TableImpl.java
index 84da1c5ec8..e34379c755 100644
--- a/jOOQ/src/main/java/org/jooq/impl/TableImpl.java
+++ b/jOOQ/src/main/java/org/jooq/impl/TableImpl.java
@@ -196,8 +196,19 @@ public class TableImpl<R extends Record> extends AbstractTable<R> implements Sco
         super(options, name, schema, comment);
 
         this.fields = new FieldsImpl<>();
-        this.child = child;
-        this.childPath = path == null ? null : Tools.aliasedKey((ForeignKey) path, child, this);
+
+        if (child != null) {
+            this.child = child;
+            this.childPath = path == null ? null : Tools.aliasedKey((ForeignKey) path, child, this);
+        }
+        else if (aliased instanceof TableImpl) {
+            this.child = ((TableImpl<?>) aliased).child;
+            this.childPath = ((TableImpl) aliased).childPath;
+        }
+        else {
+            this.child = null;
+            this.childPath = null;
+        }
 
         if (aliased != null) {
 
@@ -206,12 +217,12 @@ public class TableImpl<R extends Record> extends AbstractTable<R> implements Sco
             Alias<Table<R>> existingAlias = Tools.alias(aliased);
 
             if (existingAlias != null)
-                alias = new Alias<>(existingAlias.wrapped, this, name, existingAlias.fieldAliases, existingAlias.wrapInParentheses);
+                this.alias = new Alias<>(existingAlias.wrapped, this, name, existingAlias.fieldAliases, existingAlias.wrapInParentheses);
             else
-                alias = new Alias<>(aliased, this, name);
+                this.alias = new Alias<>(aliased, this, name);
         }
         else
-            alias = null;
+            this.alias = null;
 
         this.parameters = parameters;
     }