diff --git a/jOOQ/src/main/java/org/jooq/Select.java b/jOOQ/src/main/java/org/jooq/Select.java
index 605b0b375f..7bf274626d 100644
--- a/jOOQ/src/main/java/org/jooq/Select.java
+++ b/jOOQ/src/main/java/org/jooq/Select.java
@@ -53,6 +53,7 @@ import static org.jooq.SQLDialect.IGNITE;
 // ...
 import static org.jooq.SQLDialect.MARIADB;
 // ...
+// ...
 import static org.jooq.SQLDialect.MYSQL;
 // ...
 // ...
@@ -155,7 +156,7 @@ extends
      *             {@link StackOverflowError} when generating the SQL.
      */
     @NotNull @CheckReturnValue
-    @Support({ CUBRID, DERBY, HSQLDB, MYSQL, POSTGRES, YUGABYTEDB })
+    @Support({ CUBRID, DERBY, HSQLDB, MARIADB, MYSQL, POSTGRES, YUGABYTEDB })
     Select<R> exceptAll(Select<? extends R> select);
 
     /**
@@ -181,7 +182,7 @@ extends
      *             {@link StackOverflowError} when generating the SQL.
      */
     @NotNull @CheckReturnValue
-    @Support({ CUBRID, DERBY, HSQLDB, MYSQL, POSTGRES, YUGABYTEDB })
+    @Support({ CUBRID, DERBY, HSQLDB, MARIADB, MYSQL, POSTGRES, YUGABYTEDB })
     Select<R> intersectAll(Select<? extends R> select);
 
     /**
diff --git a/jOOQ/src/main/java/org/jooq/SelectUnionStep.java b/jOOQ/src/main/java/org/jooq/SelectUnionStep.java
index 6d1afaf955..2098c1cfb6 100644
--- a/jOOQ/src/main/java/org/jooq/SelectUnionStep.java
+++ b/jOOQ/src/main/java/org/jooq/SelectUnionStep.java
@@ -53,6 +53,7 @@ import static org.jooq.SQLDialect.IGNITE;
 // ...
 import static org.jooq.SQLDialect.MARIADB;
 // ...
+// ...
 import static org.jooq.SQLDialect.MYSQL;
 // ...
 // ...
@@ -160,7 +161,7 @@ public interface SelectUnionStep<R extends Record> extends SelectCorrelatedSubqu
      */
     @Override
     @NotNull @CheckReturnValue
-    @Support({ CUBRID, DERBY, HSQLDB, MYSQL, POSTGRES, YUGABYTEDB })
+    @Support({ CUBRID, DERBY, HSQLDB, MARIADB, MYSQL, POSTGRES, YUGABYTEDB })
     SelectOrderByStep<R> exceptAll(Select<? extends R> select);
 
     /**
@@ -176,6 +177,6 @@ public interface SelectUnionStep<R extends Record> extends SelectCorrelatedSubqu
      */
     @Override
     @NotNull @CheckReturnValue
-    @Support({ CUBRID, DERBY, HSQLDB, MYSQL, POSTGRES, YUGABYTEDB })
+    @Support({ CUBRID, DERBY, HSQLDB, MARIADB, MYSQL, POSTGRES, YUGABYTEDB })
     SelectOrderByStep<R> intersectAll(Select<? extends R> select);
 }
diff --git a/jOOQ/src/main/java/org/jooq/impl/SelectQueryImpl.java b/jOOQ/src/main/java/org/jooq/impl/SelectQueryImpl.java
index 3dabeb6c40..718b4eb941 100644
--- a/jOOQ/src/main/java/org/jooq/impl/SelectQueryImpl.java
+++ b/jOOQ/src/main/java/org/jooq/impl/SelectQueryImpl.java
@@ -88,6 +88,7 @@ import static org.jooq.SQLDialect.MARIADB;
 // ...
 // ...
 // ...
+// ...
 import static org.jooq.SQLDialect.MYSQL;
 // ...
 // ...
@@ -95,6 +96,7 @@ import static org.jooq.SQLDialect.MYSQL;
 // ...
 // ...
 // ...
+// ...
 import static org.jooq.SQLDialect.POSTGRES;
 // ...
 // ...
@@ -3184,7 +3186,7 @@ final class SelectQueryImpl<R extends Record> extends AbstractResultQuery<R> imp
 
     private static final Set<SQLDialect> NO_SUPPORT_UNION_PARENTHESES = SQLDialect.supportedBy(SQLITE);
     private static final Set<SQLDialect> NO_SUPPORT_CTE_IN_UNION      = SQLDialect.supportedBy(HSQLDB, MARIADB);
-    private static final Set<SQLDialect> UNION_PARENTHESIS            = SQLDialect.supportedBy(DERBY, MARIADB);
+    private static final Set<SQLDialect> UNION_PARENTHESIS            = SQLDialect.supportedUntil(DERBY);
 
     final boolean hasUnions() {
         return !unionOp.isEmpty();