diff --git a/jOOQ/src/main/java/org/jooq/impl/AbstractParam.java b/jOOQ/src/main/java/org/jooq/impl/AbstractParam.java
index 3a79620fe7..1dac746741 100644
--- a/jOOQ/src/main/java/org/jooq/impl/AbstractParam.java
+++ b/jOOQ/src/main/java/org/jooq/impl/AbstractParam.java
@@ -57,6 +57,8 @@ import org.jooq.Param;
 import org.jooq.ParamMode;
 import org.jooq.QualifiedRecord;
 import org.jooq.conf.ParamType;
+// ...
+// ...
 import org.jooq.tools.StringUtils;
 
 /**
@@ -196,6 +198,12 @@ abstract class AbstractParam<T> extends AbstractParamX<T> implements SimpleQuery
         return value;
     }
 
+    @Override
+    public /* non-final */ MParam<T> $value(T newValue) {
+        // TODO [#12425] Only Val implements this, so far.
+        throw new UNotYetImplementedException();
+    }
+
     // ------------------------------------------------------------------------
     // XXX: Object API
     // ------------------------------------------------------------------------
diff --git a/jOOQ/src/main/java/org/jooq/impl/AbstractParamX.java b/jOOQ/src/main/java/org/jooq/impl/AbstractParamX.java
index 562855a099..65194f3c3d 100644
--- a/jOOQ/src/main/java/org/jooq/impl/AbstractParamX.java
+++ b/jOOQ/src/main/java/org/jooq/impl/AbstractParamX.java
@@ -49,7 +49,8 @@ import org.jooq.tools.JooqLogger;
  * @author Lukas Eder
  */
 abstract class AbstractParamX<T> extends AbstractField<T> implements Param<T> {
-    private static final JooqLogger log              = JooqLogger.getLogger(AbstractParam.class);
+
+    private static final JooqLogger log = JooqLogger.getLogger(AbstractParam.class);
 
     AbstractParamX(Name name, DataType<T> type) {
         super(name, type);
diff --git a/jOOQ/src/main/java/org/jooq/impl/ConditionProviderImpl.java b/jOOQ/src/main/java/org/jooq/impl/ConditionProviderImpl.java
index e320004ceb..80142e7e03 100644
--- a/jOOQ/src/main/java/org/jooq/impl/ConditionProviderImpl.java
+++ b/jOOQ/src/main/java/org/jooq/impl/ConditionProviderImpl.java
@@ -102,9 +102,11 @@ final class ConditionProviderImpl extends AbstractQueryPart implements Condition
     @Override
     public final void addConditions(Operator operator, Condition conditions) {
         if (hasWhere())
-            condition = DSL.condition(operator, getWhere(), conditions);
+            setWhere(DSL.condition(operator, getWhere(), conditions));
+        else if (conditions instanceof ConditionProviderImpl)
+            setWhere(((ConditionProviderImpl) conditions).getWhere());
         else
-            condition = conditions;
+            setWhere(conditions);
     }
 
     @Override
diff --git a/jOOQ/src/main/java/org/jooq/impl/ConvertedVal.java b/jOOQ/src/main/java/org/jooq/impl/ConvertedVal.java
index 85a9ffaa79..717e818c1a 100644
--- a/jOOQ/src/main/java/org/jooq/impl/ConvertedVal.java
+++ b/jOOQ/src/main/java/org/jooq/impl/ConvertedVal.java
@@ -43,6 +43,7 @@ import org.jooq.Param;
 import org.jooq.ParamMode;
 import org.jooq.conf.ParamType;
 // ...
+// ...
 
 /**
  * A {@link Param} wrapper object that allows for lazily initialising the value
@@ -123,6 +124,11 @@ final class ConvertedVal<T> extends AbstractParamX<T> implements UNotYetImplemen
         return getValue();
     }
 
+    @Override
+    public final MParam<T> $value(T value) {
+        return ((AbstractParamX) delegate).$value(delegate.getDataType().convert(value));
+    }
+
     // -------------------------------------------------------------------------
     // The Object API
     // -------------------------------------------------------------------------
diff --git a/jOOQ/src/main/java/org/jooq/impl/LazyVal.java b/jOOQ/src/main/java/org/jooq/impl/LazyVal.java
index 3d37758a21..c5b5ebfcf9 100644
--- a/jOOQ/src/main/java/org/jooq/impl/LazyVal.java
+++ b/jOOQ/src/main/java/org/jooq/impl/LazyVal.java
@@ -154,6 +154,11 @@ final class LazyVal<T> extends AbstractParamX<T> implements MVal<T> {
         return delegate.$value();
     }
 
+    @Override
+    public final MParam<T> $value(T value) {
+        return delegate.$value(value);
+    }
+
     @Override
     public final <R> R traverse(
         R init,
diff --git a/jOOQ/src/main/java/org/jooq/impl/QOM.java b/jOOQ/src/main/java/org/jooq/impl/QOM.java
index 7346913203..60a6ab59f1 100644
--- a/jOOQ/src/main/java/org/jooq/impl/QOM.java
+++ b/jOOQ/src/main/java/org/jooq/impl/QOM.java
@@ -675,6 +675,7 @@ public final class QOM {
 
     public interface MParam<T> extends MField<T>, UEmpty {
         T $value();
+        MParam<T> $value(T value);
     }
     public interface MInline<T> extends MParam<T> {}
     public interface MVal<T> extends MParam<T> {}
@@ -2889,11 +2890,22 @@ public final class QOM {
      * A marker interface for {@link QueryPart} implementations whose
      * {@link MQueryPart} semantics has not yet been implemented.
      *
-     * @deprecated - [#12425] - 3.16.0 - Missing implementations should be added as soon as possible!
+     * @deprecated - [#12425] - 3.16.0 - Missing implementations should be added
+     *             as soon as possible!
      */
     @Deprecated(forRemoval = true)
     interface UNotYetImplemented extends UEmpty {}
 
+    /**
+     * A marker interface for {@link MQueryPart} methods that have not yet been
+     * implemented.
+     *
+     * @deprecated - [#12425] - 3.16.0 - Missing implementations should be added
+     *             as soon as possible!
+     */
+    @Deprecated(forRemoval = true)
+    static class UNotYetImplementedException extends RuntimeException {}
+
     interface UProxy<Q extends MQueryPart> extends MQueryPart {
         Q $delegate();
 
@@ -2932,7 +2944,7 @@ public final class QOM {
 
         @Override
         default MQueryPart replace(Function1<? super MQueryPart, ? extends MQueryPart> replacement) {
-            return this;
+            return replacement.apply(this);
         }
 
         @Override
diff --git a/jOOQ/src/main/java/org/jooq/impl/Val.java b/jOOQ/src/main/java/org/jooq/impl/Val.java
index e29ad2dcc5..e0e670bf52 100644
--- a/jOOQ/src/main/java/org/jooq/impl/Val.java
+++ b/jOOQ/src/main/java/org/jooq/impl/Val.java
@@ -76,6 +76,7 @@ import org.jooq.JSONB;
 import org.jooq.RenderContext;
 import org.jooq.conf.ParamType;
 import org.jooq.exception.DataAccessException;
+// ...
 import org.jooq.tools.JooqLogger;
 import org.jooq.tools.StringUtils;
 import org.jooq.types.DayToSecond;
@@ -339,4 +340,13 @@ final class Val<T> extends AbstractParam<T> {
             return "?";
         }
     }
+
+    // -------------------------------------------------------------------------
+    // XXX: Query Object Model
+    // -------------------------------------------------------------------------
+
+    @Override
+    public final MParam<T> $value(T newValue) {
+        return copy(newValue);
+    }
 }