来自 plsql 的 out/return 中的 CLOB 值(指定的 LOB 定位器无效:ORA-22275)
CLOB value in out/return from plsql (invalid LOB locator specified: ORA-22275)
我有存储的 plsql 过程,它从文件中获取大文本
create or replace
procedure dbst_load_a_file( p_file_name in varchar2, l_clob out clob )
as
l_bfile bfile;
dst_offset number := 1 ;
src_offset number := 1 ;
lang_ctx number := DBMS_LOB.DEFAULT_LANG_CTX;
warning number;
begin
l_bfile := bfilename( 'SCHEMES_OF_PS', p_file_name );
dbms_lob.fileopen( l_bfile );
dbms_lob.loadclobfromfile(
DEST_LOB => l_clob
, SRC_BFILE => l_bfile
, AMOUNT => dbms_lob.getlength( l_bfile )
, DEST_OFFSET => dst_offset
, SRC_OFFSET => src_offset
, BFILE_CSID => DBMS_LOB.DEFAULT_CSID
, LANG_CONTEXT => lang_ctx
, WARNING => warning);
dbms_lob.fileclose( l_bfile );
end;
然后我尝试这样使用它:
insert into SCHEME_SOURCE (SOURCE, ID, CODE)
values (exec dbst_load_a_file( 'SCHEMES_OF_PS', 'Konotop.svg' ), 15, 'Konotop');
或更正确:
declare
myVal clob := empty_clob();
begin
DBMS_OUTPUT.PUT_LINE(myVal);
dbst_load_a_file('Konotop.svg', myVal);
DBMS_OUTPUT.PUT_LINE(myVal);
end;
在第二种情况下我得到一个错误
PL/SQL: numeric or value error: invalid LOB locator specified:
ORA-22275
第一种情况,我怀疑语法不存在。
我如何 out/return CLOB 参数形成 procedure/function 以便从存储的 plsql
中使用它
如果我有这个代码
create or replace
function dbst_load_a_file2( p_file_name in varchar2 ) return clob
is
l_clob clob;
l_bfile bfile;
dst_offset number := 1 ;
src_offset number := 1 ;
lang_ctx number := DBMS_LOB.DEFAULT_LANG_CTX;
warning number;
begin
l_bfile := bfilename( 'SCHEMES_OF_PS', p_file_name );
dbms_lob.fileopen( l_bfile );
dbms_lob.loadclobfromfile(
DEST_LOB => l_clob
, SRC_BFILE => l_bfile
, AMOUNT => dbms_lob.getlength( l_bfile )
, DEST_OFFSET => dst_offset
, SRC_OFFSET => src_offset
, BFILE_CSID => DBMS_LOB.DEFAULT_CSID
, LANG_CONTEXT => lang_ctx
, WARNING => warning);
dbms_lob.fileclose( l_bfile );
return l_clob;
end;
insert into SCHEME_SOURCE (SOURCE, ID, CODE)
values (dbst_load_a_file2('Konotop.svg' ), 15, 'Konotop');
然后又报错
SQL Error: ORA-06502: PL/SQL: numeric or value error: invalid LOB locator specified: ORA-22275
ORA-06512: at "SYS.DBMS_LOB", line 890
ORA-06512: at "VAG.DBST_LOAD_A_FILE2", line 12
谢谢
您不能在 SQL 语句中使用过程,而是使用函数,如
create or replace
FUNCTION dbst_load_a_file( p_file_name in varchar2) RETURN clob
IS
.....
END;
insert into SCHEME_SOURCE (SOURCE, ID, CODE)
values (dbst_load_a_file('SCHEMES_OF_PS'), 15, 'Konotop');
此时:
dbms_lob.loadclobfromfile(
DEST_LOB => l_clob
...您的 l_clob
OUT 参数尚未初始化。使它成为一个空的 CLOB 也不起作用(所以即使你使 l_clob
一个 IN OUT 参数它仍然会抱怨)as the documentation for empty_clob
mentions:
You cannot use the locator returned from this function as a parameter to the DBMS_LOB package or the OCI.
您可以改用临时 CLOB,方法是在尝试使用它之前添加对 dbms_lob.createtemporary(l_clob, true)
的调用:
...
begin
l_bfile := bfilename( 'SCHEMES_OF_PS', p_file_name );
dbms_lob.fileopen( l_bfile );
dbms_lob.createtemporary(l_clob, true);
dbms_lob.loadclobfromfile(
DEST_LOB => l_clob
...
然后调用的时候不需要给初始空值:
declare
myVal clob;
begin
dbst_load_a_file('Konotop.svg', myVal);
DBMS_OUTPUT.PUT_LINE(myVal);
end;
/
这也可以用作函数:
create or replace
function dbst_load_a_file( p_file_name in varchar2) return clob
as
l_clob clob;
l_bfile bfile;
dst_offset number := 1 ;
src_offset number := 1 ;
lang_ctx number := DBMS_LOB.DEFAULT_LANG_CTX;
warning number;
begin
l_bfile := bfilename( 'SCHEMES_OF_PS', p_file_name );
dbms_lob.fileopen( l_bfile );
dbms_lob.createtemporary(l_clob, true);
dbms_lob.loadclobfromfile(
DEST_LOB => l_clob
, SRC_BFILE => l_bfile
, AMOUNT => dbms_lob.getlength( l_bfile )
, DEST_OFFSET => dst_offset
, SRC_OFFSET => src_offset
, BFILE_CSID => DBMS_LOB.DEFAULT_CSID
, LANG_CONTEXT => lang_ctx
, WARNING => warning);
dbms_lob.fileclose( l_bfile );
return l_clob;
end;
/
select dbst_load_a_file('Konotop.svg') from dual;
或在您编辑的问题中使用 insert
。
我有存储的 plsql 过程,它从文件中获取大文本
create or replace
procedure dbst_load_a_file( p_file_name in varchar2, l_clob out clob )
as
l_bfile bfile;
dst_offset number := 1 ;
src_offset number := 1 ;
lang_ctx number := DBMS_LOB.DEFAULT_LANG_CTX;
warning number;
begin
l_bfile := bfilename( 'SCHEMES_OF_PS', p_file_name );
dbms_lob.fileopen( l_bfile );
dbms_lob.loadclobfromfile(
DEST_LOB => l_clob
, SRC_BFILE => l_bfile
, AMOUNT => dbms_lob.getlength( l_bfile )
, DEST_OFFSET => dst_offset
, SRC_OFFSET => src_offset
, BFILE_CSID => DBMS_LOB.DEFAULT_CSID
, LANG_CONTEXT => lang_ctx
, WARNING => warning);
dbms_lob.fileclose( l_bfile );
end;
然后我尝试这样使用它:
insert into SCHEME_SOURCE (SOURCE, ID, CODE)
values (exec dbst_load_a_file( 'SCHEMES_OF_PS', 'Konotop.svg' ), 15, 'Konotop');
或更正确:
declare
myVal clob := empty_clob();
begin
DBMS_OUTPUT.PUT_LINE(myVal);
dbst_load_a_file('Konotop.svg', myVal);
DBMS_OUTPUT.PUT_LINE(myVal);
end;
在第二种情况下我得到一个错误
PL/SQL: numeric or value error: invalid LOB locator specified: ORA-22275
第一种情况,我怀疑语法不存在。
我如何 out/return CLOB 参数形成 procedure/function 以便从存储的 plsql
中使用它如果我有这个代码
create or replace
function dbst_load_a_file2( p_file_name in varchar2 ) return clob
is
l_clob clob;
l_bfile bfile;
dst_offset number := 1 ;
src_offset number := 1 ;
lang_ctx number := DBMS_LOB.DEFAULT_LANG_CTX;
warning number;
begin
l_bfile := bfilename( 'SCHEMES_OF_PS', p_file_name );
dbms_lob.fileopen( l_bfile );
dbms_lob.loadclobfromfile(
DEST_LOB => l_clob
, SRC_BFILE => l_bfile
, AMOUNT => dbms_lob.getlength( l_bfile )
, DEST_OFFSET => dst_offset
, SRC_OFFSET => src_offset
, BFILE_CSID => DBMS_LOB.DEFAULT_CSID
, LANG_CONTEXT => lang_ctx
, WARNING => warning);
dbms_lob.fileclose( l_bfile );
return l_clob;
end;
insert into SCHEME_SOURCE (SOURCE, ID, CODE)
values (dbst_load_a_file2('Konotop.svg' ), 15, 'Konotop');
然后又报错
SQL Error: ORA-06502: PL/SQL: numeric or value error: invalid LOB locator specified: ORA-22275 ORA-06512: at "SYS.DBMS_LOB", line 890 ORA-06512: at "VAG.DBST_LOAD_A_FILE2", line 12
谢谢
您不能在 SQL 语句中使用过程,而是使用函数,如
create or replace
FUNCTION dbst_load_a_file( p_file_name in varchar2) RETURN clob
IS
.....
END;
insert into SCHEME_SOURCE (SOURCE, ID, CODE)
values (dbst_load_a_file('SCHEMES_OF_PS'), 15, 'Konotop');
此时:
dbms_lob.loadclobfromfile(
DEST_LOB => l_clob
...您的 l_clob
OUT 参数尚未初始化。使它成为一个空的 CLOB 也不起作用(所以即使你使 l_clob
一个 IN OUT 参数它仍然会抱怨)as the documentation for empty_clob
mentions:
You cannot use the locator returned from this function as a parameter to the DBMS_LOB package or the OCI.
您可以改用临时 CLOB,方法是在尝试使用它之前添加对 dbms_lob.createtemporary(l_clob, true)
的调用:
...
begin
l_bfile := bfilename( 'SCHEMES_OF_PS', p_file_name );
dbms_lob.fileopen( l_bfile );
dbms_lob.createtemporary(l_clob, true);
dbms_lob.loadclobfromfile(
DEST_LOB => l_clob
...
然后调用的时候不需要给初始空值:
declare
myVal clob;
begin
dbst_load_a_file('Konotop.svg', myVal);
DBMS_OUTPUT.PUT_LINE(myVal);
end;
/
这也可以用作函数:
create or replace
function dbst_load_a_file( p_file_name in varchar2) return clob
as
l_clob clob;
l_bfile bfile;
dst_offset number := 1 ;
src_offset number := 1 ;
lang_ctx number := DBMS_LOB.DEFAULT_LANG_CTX;
warning number;
begin
l_bfile := bfilename( 'SCHEMES_OF_PS', p_file_name );
dbms_lob.fileopen( l_bfile );
dbms_lob.createtemporary(l_clob, true);
dbms_lob.loadclobfromfile(
DEST_LOB => l_clob
, SRC_BFILE => l_bfile
, AMOUNT => dbms_lob.getlength( l_bfile )
, DEST_OFFSET => dst_offset
, SRC_OFFSET => src_offset
, BFILE_CSID => DBMS_LOB.DEFAULT_CSID
, LANG_CONTEXT => lang_ctx
, WARNING => warning);
dbms_lob.fileclose( l_bfile );
return l_clob;
end;
/
select dbst_load_a_file('Konotop.svg') from dual;
或在您编辑的问题中使用 insert
。