From ce43c415c1b1999a151baff6ad2384c95e2f2ebe Mon Sep 17 00:00:00 2001
From: Lukas Eder <lukas.eder@gmail.com>
Date: Thu, 12 Dec 2019 15:48:02 +0100
Subject: [PATCH] [jOOQ/jOOQ#8528] Prevent duplicate identities in interpreter

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

diff --git a/jOOQ/src/main/java/org/jooq/impl/DDLInterpreter.java b/jOOQ/src/main/java/org/jooq/impl/DDLInterpreter.java
index 03e338ceb7..1fd54ac4ef 100644
--- a/jOOQ/src/main/java/org/jooq/impl/DDLInterpreter.java
+++ b/jOOQ/src/main/java/org/jooq/impl/DDLInterpreter.java
@@ -661,6 +661,8 @@ final class DDLInterpreter {
         for (MutableField mf : existing.fields)
             if (mf.nameEquals(field.name()))
                 throw columnAlreadyExists(field.qualifiedName());
+            else if (mf.type.identity() && dataType.identity())
+                throw new DataDefinitionException("Table can only have one identity: " + mf.qualifiedName());
 
         if (index == Integer.MAX_VALUE)
             existing.fields.add(field);