bug fixed for mapping

src/main/java/com/alibaba/druid/sql/ast/expr/SQLNumericLiteralExpr.java

@@ -24,4 +24,6 @@ public abstract class SQLNumericLiteralExpr extends SQLLiteralExpr {
     }
 
     public abstract Number getNumber();
+    
+    public abstract void setNumber(Number number);
 }

src/main/java/com/alibaba/druid/sql/dialect/oracle/ast/expr/OracleBinaryDoubleExpr.java

@@ -72,4 +72,14 @@ public class OracleBinaryDoubleExpr extends SQLNumericLiteralExpr implements Ora
         return true;
     }
 
+    @Override
+    public void setNumber(Number number) {
+        if (number == null) {
+            this.setValue(null);
+            return;
+        }
+        
+        this.setValue(number.doubleValue());
+    }
+
 }

src/main/java/com/alibaba/druid/sql/dialect/oracle/ast/expr/OracleBinaryFloatExpr.java

@@ -72,4 +72,14 @@ public class OracleBinaryFloatExpr extends SQLNumericLiteralExpr implements Orac
         return true;
     }
 
+    @Override
+    public void setNumber(Number number) {
+        if (number == null) {
+            this.setValue(null);
+            return;
+        }
+        
+        this.setValue(number.floatValue());        
+    }
+
 }