ORA-00932:不一致的数据类型：应为-got CLOB

Question

ORA-00932: inconsistent datatypes: expected - got CLOB

    UPDATE IMS_TEST 
       SET TEST_Category  = 'just testing'  
     WHERE TEST_SCRIPT    = 'something'
       AND ID             = '10000239' 

SQL> create table ims_test(
  2  test_category varchar2(30),
  3  test_script clob,
  4  id varchar2(30)
  5  );

Table created.

SQL> insert into ims_test values ('test1','something','10000239');

1 row created.

SQL> UPDATE IMS_TEST
  2  SET TEST_Category  = 'just testing'
  3  WHERE TEST_SCRIPT    = 'something'
  4  AND ID             = '10000239';
WHERE TEST_SCRIPT    = 'something'
      *
ERROR at line 3:
ORA-00932: inconsistent datatypes: expected - got CLOB

Answer 1

不能在WHERE子句中放入CLOB。从文档中可以看到：

比较条件不支持大型对象。但是，您可以使用PL/SQL程序对CLOB数据进行比较。

如果您的值始终小于4K，则可以使用：

UPDATE IMS_TEST 
   SET TEST_Category           = 'just testing'  
 WHERE to_char(TEST_SCRIPT)    = 'something'
   AND ID                      = '10000239';