refactor

src/main/java/com/alibaba/druid/sql/dialect/sqlserver/ast/expr/SQLServerExpr.java

@@ -0,0 +1,8 @@
+package com.alibaba.druid.sql.dialect.sqlserver.ast.expr;
+
+import com.alibaba.druid.sql.ast.SQLExpr;
+
+
+public interface SQLServerExpr extends SQLExpr {
+
+}

src/main/java/com/alibaba/druid/sql/dialect/sqlserver/ast/expr/SQLServerObjectReferenceExpr.java

@@ -0,0 +1,83 @@
+package com.alibaba.druid.sql.dialect.sqlserver.ast.expr;
+
+import com.alibaba.druid.sql.dialect.sqlserver.ast.SQLServerObjectImpl;
+import com.alibaba.druid.sql.dialect.sqlserver.visitor.SQLServerASTVisitor;
+
+public class SQLServerObjectReferenceExpr extends SQLServerObjectImpl implements SQLServerExpr {
+
+    private static final long serialVersionUID = 1L;
+
+    private String            server;
+    private String            database;
+    private String            schema;
+    private String            object;
+
+    @Override
+    public void accept0(SQLServerASTVisitor visitor) {
+
+    }
+
+    public void output(StringBuffer buf) {
+        boolean flag = false;
+        if (server != null) {
+            buf.append(server);
+            buf.append('.');
+            flag = true;
+        }
+
+        if (database != null) {
+            buf.append(database);
+            buf.append('.');
+            flag = true;
+        } else {
+            if (flag) {
+                buf.append('.');
+            }
+        }
+
+        if (schema != null) {
+            buf.append(schema);
+            buf.append('.');
+            flag = true;
+        } else {
+            if (flag) {
+                buf.append('.');
+            }
+        }
+
+        buf.append(object);
+    }
+
+    public String getServer() {
+        return server;
+    }
+
+    public void setServer(String server) {
+        this.server = server;
+    }
+
+    public String getDatabase() {
+        return database;
+    }
+
+    public void setDatabase(String database) {
+        this.database = database;
+    }
+
+    public String getSchema() {
+        return schema;
+    }
+
+    public void setSchema(String schema) {
+        this.schema = schema;
+    }
+
+    public String getObject() {
+        return object;
+    }
+
+    public void setObject(String object) {
+        this.object = object;
+    }
+
+}

src/main/java/com/alibaba/druid/sql/dialect/sqlserver/parser/SQLServerExprParser.java

@@ -0,0 +1,18 @@
+package com.alibaba.druid.sql.dialect.sqlserver.parser;
+
+import com.alibaba.druid.sql.parser.Lexer;
+import com.alibaba.druid.sql.parser.ParserException;
+import com.alibaba.druid.sql.parser.SQLExprParser;
+
+public class SQLServerExprParser extends SQLExprParser {
+
+    public SQLServerExprParser(Lexer lexer){
+        super(lexer);
+    }
+
+    public SQLServerExprParser(String sql) throws ParserException{
+        super(new SQLServerLexer(sql));
+        this.lexer.nextToken();
+    }
+
+}

src/main/java/com/alibaba/druid/sql/dialect/sqlserver/parser/SQLServerStatementParser.java

@@ -24,6 +24,7 @@ public class SQLServerStatementParser extends SQLStatementParser {
     public SQLServerStatementParser(String sql){
         super(new SQLServerLexer(sql));
         this.lexer.nextToken();
+        this.exprParser = new SQLServerExprParser(lexer);
     }
     
     public SQLSelectParser createSQLSelectParser() {