Nifi从ExecuteSQL输出中提取内容

Question

我正在尝试从Oracle获取DDL，然后将DDL转换为适合于Vertica数据库的语法。我的ExecuteSQL处理器SQL查询是：

select dbms_metadata.get_ddl('TABLE','${table_name}','${owner}') as t_ddl from dual

我得到以下AVRO格式的输出：

Objavro.schemaú{"type":"record","name":"NiFi_ExecuteSQL_Record","namespace":"any.data","fields":[{"name":"T_DDL","type":["null","string"]}]}avro.codecnull­¶½``¼�÷KGÙ‡LÞoCäÞ
  CREATE TABLE "VDBA"."CUSTOMERS" 
   (    "CUSTOMER_ID" NUMBER(10,0) NOT NULL ENABLE, 
    "CUSTOMER_NAME" VARCHAR2(50) NOT NULL ENABLE, 
    "CITY" VARCHAR2(50), 
    "ITEMS_CNT" NUMBER(5,0), 
    "TSTAMP" TIMESTAMP (6) DEFAULT CURRENT_TIMESTAMP NOT NULL ENABLE
   ) SEGMENT CREATION IMMEDIATE 
  PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 
 NOCOMPRESS LOGGING
  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1
  BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT)
  TABLESPACE "USERS" ­¶½``¼�÷KGÙ‡LÞoC

CREATE TABLE VDBA.CUSTOMERS 
   (CUSTOMER_ID NUMBER(10,0) NOT NULL, 
    CUSTOMER_NAME VARCHAR2(50) NOT NULL, 
    CITY VARCHAR2(50), 
    ITEMS_CNT NUMBER(5,0), 
    TSTAMP TIMESTAMP (6) DEFAULT CURRENT_TIMESTAMP NOT NULL
   )

我不明白下一步该如何进行。ReplaceText处理器在这里能工作吗？请给我一些指示，让我继续前进。

谢谢和问候，比沙尔

Answer 1

尝试使用convertavrotoJSON处理器，然后操作或提取JSON。