content: package com.alibaba.druid.bvt.sql.schemaStat;
  
  import com.alibaba.druid.DbType;
  import com.alibaba.druid.sql.SQLUtils;
  import com.alibaba.druid.sql.ast.SQLStatement;
  import com.alibaba.druid.sql.parser.SQLParserUtils;
  import com.alibaba.druid.sql.parser.SQLStatementParser;
  import com.alibaba.druid.sql.visitor.SchemaStatVisitor;
  import com.alibaba.druid.util.JdbcConstants;
  import junit.framework.TestCase;
  
  public class SchemaStatTest2 extends TestCase {
      public void test_schemaStat() throws Exception {
          String sql = "select "
                  + " create_time_dd          as  来电日期"
                  + " from alisec_app.adl_tb_wing_rubbish_laidian_new_reason_realname_fdt  "
                  + " order by   来电日期  desc  limit  30;";
  
          DbType dbType = JdbcConstants.MYSQL;
          SQLStatementParser parser = SQLParserUtils.createSQLStatementParser(sql, dbType);
          SQLStatement stmt = parser.parseStatementList().get(0);
  
          SchemaStatVisitor statVisitor = SQLUtils.createSchemaStatVisitor(dbType);
          stmt.accept(statVisitor);
  
          System.out.println(statVisitor.getColumns());
  
          assertEquals(1, statVisitor.getColumns().size());
      }
  }
  