MaxComputer-Pyodps之mysql ddl 批量生成odps ddl
系统环境:windows 64 位python版本:2.7Maxcomputer(原ODPS) ----- 1、安装python2.7(略过,百度一下就可以) ----- 2、安装MySQLdb模块windows下个人习惯pip 安装 whl文件,虽然不是所有都能顺利安装,但是大部分还是可以的。下载地址:https://www.lfd.uci.edu/~gohlke/pythonlibs/#mysql-python 下载到本地后,cmd进入dos环境,可以直接切换到下载目录,直接使用命令 pip install mysqlclient-1.3.13-cp27-cp27m-win_amd64.whl 或者pip-script.py install mysqlclient-1.3.13-cp27-cp27m-win_amd64.whl 编译方法:1、创建个xxx.py的文件,进入dos,切换到py文件路径:python xxx.py 2、使用编译工具:PyCharm、Maxcomputer Studio等工具执行 #!/usr/bin/python # -*- coding: UTF-8 -*- # author:zhy import MySQLdb ##### mysql数据库配置 def exec_sql(sql): conn=MySQLdb.connect(host='数据库地址',user='用户',passwd='密码',db=TABLE_SCHEMA,charset='utf8') cursor = conn.cursor() cursor.execute(sql) rows = cursor.fetchall() cursor.close() conn.close() return rows #### schema TABLE_SCHEMA='mysql' # mysql数据库元数据库 sys_id='s01' # ods入edw规范:表名+前缀 target_schema='odps_project' #odps对应项目名称 ##### 获取mysql表名 sql=''' select table_name from information_schema.`TABLES` where TABLE_SCHEMA='%s' and table_type='BASE TABLE' '''%TABLE_SCHEMA exec_relusts=exec_sql(sql) # sql执行结果为二维 out_comment='' # 定义输出参数 ###以下并不包含所有mysql字段类型的转换 for i in exec_relusts: TABLE_NAME = i[0] print TABLE_NAME sql=''' select TABLE_NAME ,COLUMN_NAME ,case when DATA_TYPE in ('varchar','char','date','longtext','text') then 'string' when DATA_TYPE in ('float') then 'double' when DATA_TYPE = 'tinyint' then 'int' when DATA_TYPE = 'timestamp' then 'datetime' else DATA_TYPE end as DATA_TYPE ,COLUMN_COMMENT from information_schema.`COLUMNS` where TABLE_SCHEMA = '%s' and TABLE_NAME = '%s' order by TABLE_NAME,ORDINAL_POSITION '''%(TABLE_SCHEMA,TABLE_NAME) rows=exec_sql(sql) sql=''' show create table %s.%s '''%(TABLE_SCHEMA,TABLE_NAME) sql_exec_result= exec_sql(sql) ddl_info0= sql_exec_result[0][1] if ddl_info0.find('COMMENT=')>1: ddl_table_common = ddl_info0[ddl_info0.index("COMMENT="):] ddl_table_common= ddl_table_common.replace('=',' ') else: ddl_table_common="COMMENT ''" ddl_info='CREATE TABLE IF NOT EXISTS %s.%s_%s (\n'%(target_schema,sys_id,TABLE_NAME) for row in rows: row3=row[3].replace('\r\n','\\r\\n') row3=row3.replace('\n','\\n') ddl_info=ddl_info+ str(row[1]).upper()+' '+row[2].upper()+' '+"COMMENT'"+ row3+"'\n," ddl_info=ddl_info+')' ddl_info=ddl_info.replace(')',')') ddl_info=ddl_info+'\n'+ddl_table_common+"\nPARTITIONED BY (PT STRING COMMENT '数据日期')".decode('utf-8') #如不需分区,需修改 out_comment= out_comment+'-- '+TABLE_NAME +'\n'+ddl_info +'\n;\n' # print out_comment # 将DDL语句输出到文件 Output_File=r'D:\data\output'+'\\'+sys_id+'_'+TABLE_SCHEMA+'.sql' file_w=file(Output_File,"w") file_w.write(out_comment.encode("utf-8")) file_w.close()