remove sql server unnecessary codes

sharding-jdbc-core/src/main/java/com/alibaba/druid/sql/dialect/sqlserver/ast/SQLServerTop.java → sharding-jdbc-core/src/main/java/com/alibaba/druid/sql/context/SQLServerTop.java

-/*
- * Copyright 1999-2101 Alibaba Group Holding Ltd.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.alibaba.druid.sql.dialect.sqlserver.ast;
-
-import com.alibaba.druid.sql.ast.SQLExpr;
-import com.alibaba.druid.sql.ast.SQLObjectImpl;
-import lombok.Getter;
-import lombok.Setter;
-
-@Getter
-@Setter
-public class SQLServerTop extends SQLObjectImpl {
-    
-    private SQLExpr expr;
-    
-    private boolean percent;
-    
-    public void setExpr(final SQLExpr expr) {
-        if (null != expr) {
-            expr.setParent(this);
-        }
-        this.expr = expr;
-    }
-}
+/*
+ * Copyright 1999-2101 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alibaba.druid.sql.context;
+
+import com.alibaba.druid.sql.ast.SQLExpr;
+import com.alibaba.druid.sql.ast.SQLObjectImpl;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class SQLServerTop extends SQLObjectImpl {
+    
+    private SQLExpr expr;
+    
+    private boolean percent;
+    
+    public void setExpr(final SQLExpr expr) {
+        if (null != expr) {
+            expr.setParent(this);
+        }
+        this.expr = expr;
+    }
+}

sharding-jdbc-core/src/main/java/com/alibaba/druid/sql/dialect/sqlserver/ast/SQLServerSelectQueryBlock.java

-/*
- * Copyright 1999-2101 Alibaba Group Holding Ltd.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.alibaba.druid.sql.dialect.sqlserver.ast;
-
-import com.alibaba.druid.sql.ast.statement.SQLSelectQueryBlock;
-import lombok.Getter;
-
-@Getter
-public class SQLServerSelectQueryBlock extends SQLSelectQueryBlock {
-    
-    private SQLServerTop top;
-    
-    public void setTop(final SQLServerTop top) {
-        if (null != top) {
-            top.setParent(this);
-        }
-        this.top = top;
-    }
-}

sharding-jdbc-core/src/main/java/com/alibaba/druid/sql/dialect/sqlserver/lexer/SQLServerKeyword.java

@@ -28,6 +28,7 @@ public enum SQLServerKeyword implements Keyword {
     
     TOP,
     OFFSET,
+    PERCENT,
     ONLY,
     IF,
     OUTPUT,

sharding-jdbc-core/src/main/java/com/alibaba/druid/sql/dialect/sqlserver/parser/SQLServerExprParser.java

@@ -18,7 +18,7 @@ package com.alibaba.druid.sql.dialect.sqlserver.parser;
 
 import com.alibaba.druid.sql.context.LimitContext;
 import com.alibaba.druid.sql.context.SelectSQLContext;
-import com.alibaba.druid.sql.dialect.sqlserver.ast.SQLServerTop;
+import com.alibaba.druid.sql.context.SQLServerTop;
 import com.alibaba.druid.sql.dialect.sqlserver.lexer.SQLServerKeyword;
 import com.alibaba.druid.sql.dialect.sqlserver.lexer.SQLServerLexer;
 import com.alibaba.druid.sql.lexer.DataType;
@@ -40,7 +40,7 @@ public class SQLServerExprParser extends SQLExprParser {
     
     public SQLServerTop parseTop() {
         // TODO
-//        if (getLexer().equalToken(Token.TOP)) {
+//        if (getLexer().equalToken(SQLServerKeyword.TOP)) {
 //            SQLServerTop top = new SQLServerTop();
 //            getLexer().nextToken();
 //            
@@ -56,7 +56,7 @@ public class SQLServerExprParser extends SQLExprParser {
 //                getLexer().accept(Symbol.RIGHT_PAREN);
 //            }
 //            
-//            if (getLexer().equalToken(Token.PERCENT)) {
+//            if (getLexer().equalToken(SQLServerKeyword.PERCENT)) {
 //                getLexer().nextToken();
 //                top.setPercent(true);
 //            }

sharding-jdbc-core/src/main/java/com/alibaba/druid/sql/dialect/sqlserver/parser/SQLServerSelectParser.java

@@ -16,7 +16,6 @@
 
 package com.alibaba.druid.sql.dialect.sqlserver.parser;
 
-import com.alibaba.druid.sql.dialect.sqlserver.ast.SQLServerSelectQueryBlock;
 import com.alibaba.druid.sql.dialect.sqlserver.lexer.SQLServerKeyword;
 import com.alibaba.druid.sql.lexer.DataType;
 import com.alibaba.druid.sql.lexer.DefaultKeyword;
@@ -43,7 +42,6 @@ public class SQLServerSelectParser extends AbstractSelectParser {
     
     @Override
     public void query() {
-        SQLServerSelectQueryBlock queryBlock = new SQLServerSelectQueryBlock();
         if (getExprParser().getLexer().equalToken(DefaultKeyword.SELECT)) {
             getExprParser().getLexer().nextToken();
             if (getExprParser().getLexer().equalToken(DataType.COMMENT)) {
@@ -51,7 +49,8 @@ public class SQLServerSelectParser extends AbstractSelectParser {
             }
             parseDistinct();
             if (getExprParser().getLexer().equalToken(SQLServerKeyword.TOP)) {
-                queryBlock.setTop(((SQLServerExprParser) getExprParser()).parseTop());
+                // TODO save topContext
+                ((SQLServerExprParser) getExprParser()).parseTop();
             }
             parseSelectList();
         }