content: package com.alibaba.datax.plugin.rdbms.writer;
  
  public final class Key {
      public final static String JDBC_URL = "jdbcUrl";
  
      public final static String USERNAME = "username";
  
      public final static String PASSWORD = "password";
  
      public final static String TABLE = "table";
  
      public final static String COLUMN = "column";
  
      public final static String ONCONFLICT_COLUMN = "onConflictColumn";
  
      //可选值为：insert,replace，默认为 insert （mysql 支持，oracle 没用 replace 机制，只能 insert,oracle 可以不暴露这个参数）
      public final static String WRITE_MODE = "writeMode";
  
      public final static String PRE_SQL = "preSql";
  
      public final static String POST_SQL = "postSql";
  
      public final static String TDDL_APP_NAME = "appName";
  
      //默认值：256
      public final static String BATCH_SIZE = "batchSize";
  
      //默认值：32m
      public final static String BATCH_BYTE_SIZE = "batchByteSize";
  
      public final static String EMPTY_AS_NULL = "emptyAsNull";
  
      public final static String DB_NAME_PATTERN = "dbNamePattern";
  
      public final static String DB_RULE = "dbRule";
  
      public final static String TABLE_NAME_PATTERN = "tableNamePattern";
  
      public final static String TABLE_RULE = "tableRule";
  
      public final static String DRYRUN = "dryRun";
  }