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(‘中文測(cè)試’));

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!

中文測(cè)試

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 中文測(cè)試

這里用到了兩個(gè)函數(shù)：

utl_raw.cast_to_raw([varchar2]);–將varchar2轉(zhuǎn)換為raw類型

utl_raw.cast_to_varchar2([raw]);–將raw轉(zhuǎn)換為varchar2類型

這里varchar2的字符集一般是GB2312。

另外：

utl_raw包的幾個(gè)其他的函數(shù)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();

另外還有轉(zhuǎn)換函數(shù)：

hextoraw(); –將對(duì)應(yīng)16進(jìn)制數(shù)轉(zhuǎn)換為raw

當(dāng)使用HEXTORAW時(shí)，會(huì)把字符串中數(shù)據(jù)當(dāng)作16進(jìn)制數(shù)。而使用UTL_RAW.CAST_TO_RAW時(shí)，直接把字符串中每個(gè)字符的ASCII碼存放到RAW類型的字段中

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