SQL create table datatype_test_raw(paddr raw(8)); Table created SQL insert into datatype_test_raw(paddr) values(utl_raw.cast_to_raw(‘This is a raw type test!’)); insert into datatype_test_raw(paddr) values(utl_raw.cast_to_raw(‘This is a raw

SQL> create table datatype_test_raw(paddr raw(8));

Table created

SQL> insert into datatype_test_raw(paddr) values(utl_raw.cast_to_raw(‘This is a raw type test!’));

insert into datatype_test_raw(paddr) values(utl_raw.cast_to_raw(‘This is a raw type test!’))

ORA-01401: inserted value too large for column

SQL> alter table datatype_test_raw modify paddr raw(20);

Table altered

SQL> insert into datatype_test_raw(paddr) values(utl_raw.cast_to_raw(‘This is a raw type test!’));

insert into datatype_test_raw(paddr) values(utl_raw.cast_to_raw(‘This is a raw type test!’))

ORA-01401: inserted value too large for column

SQL> insert into datatype_test_raw(paddr) values(utl_raw.cast_to_raw(‘This is a raw test!’));

1 row inserted

SQL> commit;

Commit complete

SQL> select * from datatype_test_raw;

PADDR

—————————————-

54686973206973206120726177207465737421

SQL> select utl_raw.cast_to_varchar2(paddr) from datatype_test_raw;

UTL_RAW.CAST_TO_VARCHAR2(PADDR

——————————————————————————–

This is a raw test!

SQL> insert into datatype_test_raw(paddr) values(utl_raw.cast_to_raw(‘中文测试’));

1 row inserted

SQL> commit;

Commit complete

SQL> select utl_raw.cast_to_varchar2(paddr) from datatype_test_raw;

UTL_RAW.CAST_TO_VARCHAR2(PADDR

——————————————————————————–

This is a raw test!

中文测试

SQL> select paddr, utl_raw.cast_to_varchar2(paddr) from datatype_test_raw;

PADDR UTL_RAW.CAST_TO_VARCHAR2(PADDR

—————————————- ——————————————————————————–

54686973206973206120726177207465737421 This is a raw test!

D6D0CEC4B2E2CAD4 中文测试

这里用到了两个函数：

utl_raw.cast_to_raw([varchar2]);–将varchar2转换为raw类型

utl_raw.cast_to_varchar2([raw]);–将raw转换为varchar2类型

这里varchar2的字符集一般是GB2312。

另外：

utl_raw包的几个其他的函数用法：

utl_raw.cast_from_number([number]);

utl_raw.cast_to_number([number]);

位操作：

utl_raw.bit_or();

utl_raw.bit_and();

utl_raw.bit_xor();

另外还有转换函数：

hextoraw(); –将对应16进制数转换为raw

当使用HEXTORAW时，会把字符串中数据当作16进制数。而使用UTL_RAW.CAST_TO_RAW时，直接把字符串中每个字符的ASCII码存放到RAW类型的字段中