content: package com.alibaba.druid.bvt.sql.mysql.select;
  
  import com.alibaba.druid.sql.MysqlTest;
  import com.alibaba.druid.sql.SQLUtils;
  import com.alibaba.druid.sql.ast.SQLStatement;
  import com.alibaba.druid.sql.ast.statement.SQLSelectStatement;
  import com.alibaba.druid.sql.visitor.ParameterizedOutputVisitorUtils;
  import com.alibaba.druid.util.JdbcConstants;
  
  import java.util.List;
  
  /**
   * @version 1.0
   * @ClassName MySqlSelectTest_eq_null_parameterized
   * @description
   * @Author zzy
   * @Date 2019-07-16 17:28
   */
  public class MySqlSelectTest_eq_null_parameterized extends MysqlTest {
      public void test_0() throws Exception {
          String sql = "select * from test_null_shard where id = null;";
  
          List<SQLStatement> statementList = SQLUtils.parseStatements(sql, JdbcConstants.MYSQL);
          SQLSelectStatement stmt = (SQLSelectStatement) statementList.get(0);
  
          assertEquals(1, statementList.size());
  
          assertEquals("SELECT *\n" +
                  "FROM test_null_shard\n" +
                  "WHERE id = NULL;", stmt.toString());
  
          assertEquals("SELECT *\n" +
                  "FROM test_null_shard\n" +
                  "WHERE id = ?;", ParameterizedOutputVisitorUtils.parameterize(sql, JdbcConstants.MYSQL));
      }
  }
  