Query for long columns in Oracle __oracle

Sql> CREATE TABLE T_long (ID number, long_col LONG); 　　Table has been created. 　　Sql> INSERT into T_long VALUES (1, Lpad (1, 32767, ' HELLO world! ')); 　　1 lines have been created. 　　Sql> COMMIT; 　　Submit completed. 　　Sql> SELECT * from T_long WHERE long_col like '%world% ' 2; SELECT * from T_long WHERE long_col like '%world% ' * error on line 1th: ORA-00932: Data type inconsistency: should be number, but get LONG based on Oracle's recommendation, You should avoid using the long type again. 　　If you might want to use TO_LOB to rebuild a table, convert a long type in the table to a CLOB or blob type. 　　This method is not considered here, just to discuss how to query for tables that cannot be rebuilt. If the data in the table is not longer than 32K, consider implementing the following Pl/sql code like this: sql> SET serverout on sql> BEGIN 2 to I in (SELECT * from T_long) L OOP 3 IF INSTR (I.long_col, ' world ') > 0 THEN 4 dbms_output. 　　Put_Line (i.id); 　　5 End IF; 　　6 End LOOP; 　　7 End; 　　The 8/1 Pl/sql process has completed successfully. 　　However, Pl/sql code can only handle no more than 32K of data, beyond this limit, can not be processed through pl/sql. Fortunately, Oracle's Full-text indexing supports a LONG type, creating a context index that can be solved by using the Full-text indexed query syntax: sql> CREATE INDEX ind_t_long_col on T_long (Long_col) Indextype is Ctxsys. 　　context; 　　The index has been created. Sql> SELECT ID from T_long WHERE CONTAINS (Long_col, ' World ') > 0; ID----------1