bug fixed for SchemaStatVisitor. for issue #2407

src/main/java/com/alibaba/druid/stat/TableStat.java

@@ -18,6 +18,7 @@ package com.alibaba.druid.stat;
 import com.alibaba.druid.sql.SQLUtils;
 import com.alibaba.druid.sql.ast.SQLExpr;
 import com.alibaba.druid.sql.ast.expr.SQLPropertyExpr;
+import com.alibaba.druid.support.json.JSONUtils;
 import com.alibaba.druid.util.FnvHash;
 import com.alibaba.druid.util.JdbcConstants;
 
@@ -366,26 +367,32 @@ public class TableStat {
         }
 
         public String toString() {
-            StringBuilder stringBuilder = new StringBuilder();
-            stringBuilder.append(this.column.toString());
-            stringBuilder.append(' ');
-            stringBuilder.append(this.operator);
+            StringBuilder buf = new StringBuilder();
+            buf.append(this.column.toString());
+            buf.append(' ');
+            buf.append(this.operator);
 
             if (values.size() == 1) {
-                stringBuilder.append(' ');
-                stringBuilder.append(String.valueOf(this.values.get(0)));
+                buf.append(' ');
+                buf.append(String.valueOf(this.values.get(0)));
             } else if (values.size() > 0) {
-                stringBuilder.append(" (");
+                buf.append(" (");
                 for (int i = 0; i < values.size(); ++i) {
                     if (i != 0) {
-                        stringBuilder.append(", ");
+                        buf.append(", ");
+                    }
+                    Object val = values.get(i);
+                    if (val instanceof String) {
+                        String jsonStr = JSONUtils.toJSONString(val);
+                        buf.append(jsonStr);
+                    } else {
+                        buf.append(String.valueOf(val));
                     }
-                    stringBuilder.append(String.valueOf(values.get(i)));
                 }
-                stringBuilder.append(")");
+                buf.append(")");
             }
 
-            return stringBuilder.toString();
+            return buf.toString();
         }
     }
 

src/test/java/com/alibaba/druid/bvt/sql/mysql/visitor/MySqlSchemaStatVisitorTest9_in.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright 1999-2017 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.bvt.sql.mysql.visitor;
+
+import com.alibaba.druid.sql.ast.SQLStatement;
+import com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser;
+import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlSchemaStatVisitor;
+import junit.framework.TestCase;
+
+import java.util.List;
+
+public class MySqlSchemaStatVisitorTest9_in extends TestCase {
+
+	public void test_0() throws Exception {
+		String sql = "SELECT name FROM employee WHERE no in ('1', '2');";
+
+//		sql = "select columnName from table1 where id in (select id from table3 where name = ?)";
+		MySqlStatementParser parser = new MySqlStatementParser(sql);
+		List<SQLStatement> statementList = parser.parseStatementList();
+		SQLStatement stmt = statementList.get(0);
+
+		assertEquals(1, statementList.size());
+
+		MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
+		stmt.accept(visitor);
+
+		System.out.println(stmt.toString());
+
+//		System.out.println(sql);
+		System.out.println("Tables : " + visitor.getTables());
+		System.out.println("fields : " + visitor.getColumns());
+		System.out.println(visitor.getConditions());
+
+		assertEquals(1, visitor.getTables().size());
+		assertEquals("[employee.no IN (\"1\", \"2\")]", visitor.getConditions().toString());
+		// Column("users", "name")));
+
+	}
+
+}