From e6d1a04b239bfd2d5055e777d41269c793de6624 Mon Sep 17 00:00:00 2001
From: Lukas Eder <lukas.eder@gmail.com>
Date: Mon, 18 Nov 2019 11:31:33 +0100
Subject: [PATCH] [jOOQ/jOOQ#9557] Add support for ALTER TABLE .. DROP
 CONSTRAINT IF EXISTS

- Added DDL interpreter support
---
 jOOQ/src/main/java/org/jooq/impl/DDLInterpreter.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/jOOQ/src/main/java/org/jooq/impl/DDLInterpreter.java b/jOOQ/src/main/java/org/jooq/impl/DDLInterpreter.java
index 04a5404742..38faa79fd9 100644
--- a/jOOQ/src/main/java/org/jooq/impl/DDLInterpreter.java
+++ b/jOOQ/src/main/java/org/jooq/impl/DDLInterpreter.java
@@ -500,7 +500,8 @@ final class DDLInterpreter {
                     }
                 }
 
-                throw constraintNotExists(query.$dropConstraint());
+                if (!query.$ifExistsConstraint())
+                    throw constraintNotExists(query.$dropConstraint());
             }
         }
         else if (query.$dropConstraintType() == PRIMARY_KEY) {