diff --git a/jOOQ/src/main/java/org/jooq/impl/Dual.java b/jOOQ/src/main/java/org/jooq/impl/Dual.java
index 923605c677..607bc90531 100644
--- a/jOOQ/src/main/java/org/jooq/impl/Dual.java
+++ b/jOOQ/src/main/java/org/jooq/impl/Dual.java
@@ -118,6 +118,7 @@ class Dual extends AbstractTable<Record> {
                 xxxx xxxxxxxxxx
                 xxxx xxxxxxxx
                 xx [/pro] */
+                case H2:
                 case POSTGRES:
                 case SQLITE:
                     break;
@@ -169,6 +170,12 @@ class Dual extends AbstractTable<Record> {
                        .literal("SYSDUMMY1");
                     break;
 
+                case MARIADB:
+                case MYSQL:
+                /* [pro] xx
+                xxxx xxxxxxx
+                xx [/pro] */
+
                 default:
                     ctx.keyword("dual");
                     break;
diff --git a/jOOQ/src/main/java/org/jooq/impl/SelectQueryImpl.java b/jOOQ/src/main/java/org/jooq/impl/SelectQueryImpl.java
index dd193abf2f..3241c3ab3c 100644
--- a/jOOQ/src/main/java/org/jooq/impl/SelectQueryImpl.java
+++ b/jOOQ/src/main/java/org/jooq/impl/SelectQueryImpl.java
@@ -1027,7 +1027,7 @@ class SelectQueryImpl<R extends Record> extends AbstractResultQuery<R> implement
             /* [pro] xx
             xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xx xxxxx
             xx [/pro] */
-            || asList(CUBRID, DERBY, FIREBIRD, HSQLDB).contains(family)
+            || asList(CUBRID, DERBY, FIREBIRD, HSQLDB, MARIADB, MYSQL).contains(family)
         ;
 
         List<Condition> semiAntiJoinPredicates = null;