bug fixed for mapping

src/main/java/com/alibaba/druid/mapping/spi/MSSQLServerMappingProvider.java

@@ -2,6 +2,7 @@ package com.alibaba.druid.mapping.spi;
 
 import com.alibaba.druid.mapping.MappingEngine;
 import com.alibaba.druid.sql.ast.expr.SQLNumberExpr;
+import com.alibaba.druid.sql.ast.expr.SQLNumericLiteralExpr;
 import com.alibaba.druid.sql.ast.statement.SQLSelectQueryBlock;
 import com.alibaba.druid.sql.dialect.sqlserver.ast.SQLServerSelectQueryBlock;
 import com.alibaba.druid.sql.dialect.sqlserver.ast.Top;
@@ -13,7 +14,7 @@ public class MSSQLServerMappingProvider implements MappingProvider {
 
     @Override
     public MappingVisitor createMappingVisitor(MappingEngine engine) {
-        return new MySqlMappingVisitor(engine.getEntities());
+        return new MSSQLServerMappingVisitor(engine.getEntities());
     }
 
     @Override
@@ -33,7 +34,7 @@ public class MSSQLServerMappingProvider implements MappingProvider {
                 top.setExpr(new SQLNumberExpr(maxLimit));
                 query.setTop(top);
             } else {
-                SQLNumberExpr rowCountExpr = (SQLNumberExpr) query.getTop().getExpr();
+                SQLNumericLiteralExpr rowCountExpr = (SQLNumericLiteralExpr) query.getTop().getExpr();
                 int rowCount = rowCountExpr.getNumber().intValue();
                 if (rowCount > maxLimit.intValue()) {
                     rowCountExpr.setNumber(maxLimit);

src/main/java/com/alibaba/druid/mapping/spi/MySqlMappingProvider.java

@@ -1,7 +1,8 @@
 package com.alibaba.druid.mapping.spi;
 
 import com.alibaba.druid.mapping.MappingEngine;
-import com.alibaba.druid.sql.ast.expr.SQLNumberExpr;
+import com.alibaba.druid.sql.ast.expr.SQLIntegerExpr;
+import com.alibaba.druid.sql.ast.expr.SQLNumericLiteralExpr;
 import com.alibaba.druid.sql.ast.statement.SQLSelectQueryBlock;
 import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlSelectQueryBlock;
 import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlSelectQueryBlock.Limit;
@@ -30,10 +31,10 @@ public class MySqlMappingProvider implements MappingProvider {
         if (maxLimit != null) {
             if (query.getLimit() == null) {
                 Limit limit = new Limit();
-                limit.setRowCount(new SQLNumberExpr(maxLimit));
+                limit.setRowCount(new SQLIntegerExpr(maxLimit));
                 query.setLimit(limit);
             } else {
-                SQLNumberExpr rowCountExpr = (SQLNumberExpr) query.getLimit().getRowCount();
+                SQLNumericLiteralExpr rowCountExpr = (SQLNumericLiteralExpr) query.getLimit().getRowCount();
                 int rowCount = rowCountExpr.getNumber().intValue();
                 if (rowCount > maxLimit.intValue()) {
                     rowCountExpr.setNumber(maxLimit);

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());        
+    }
+
 }