DefaultDataType.java

gistfile1.diff

diff --git a/jOOQ/src/main/java/org/jooq/impl/DefaultDataType.java b/jOOQ/src/main/java/org/jooq/impl/DefaultDataType.java
index 5231af3..fd19cce 100644
--- a/jOOQ/src/main/java/org/jooq/impl/DefaultDataType.java
+++ b/jOOQ/src/main/java/org/jooq/impl/DefaultDataType.java
@@ -720,6 +717,15 @@ public class DefaultDataType<T> implements DataType<T> {
 
             if (dialect != null) {
                 result = TYPES_BY_TYPE[dialect.family().ordinal()].get(type);
+
+                // check if we know about interfaces implemented by the type
+                if (result == null) {
+                    for (Map.Entry<Class<?>, DataType<?>> knownType : TYPES_BY_TYPE[dialect.family().ordinal()].entrySet()) {
+                        if(knownType.getKey().isAssignableFrom(type)) {
+                            result = knownType.getValue();
+                        }
+                    }
+                }
             }
 
             if (result == null) {