.. FILE1:= UTL_FILE.FOPEN('DIR','cg.csv','w',32000); .. 我们正在生成一个csv文件,该文件具有视图的多列的连接值。 在oracle plsql中有没有办法使用utl_file从超过32000的数据生成csv
答案 0 :(得分:0)
根据Oracle's documentation功能UTL_FILE.FOPEN
:
FOPEN max_linesize参数必须是1和32767范围内的数字
所以你可以把它增加到32767,但不会超过那个。
您可能需要考虑创建多个文件。
答案 1 :(得分:0)
declare
FILEHANDLE UTL_FILE.FILE_TYPE;
WRITEMESSAGE varchar2(200);
longLine varchar2(32767);
newline char(2) := CHR(13) || CHR(10);
begin
longLine := LPAD('aaaa', 32766,'x');
FILEHANDLE := UTL_FILE.FOPEN('XMLDIR','lonLineFile.txt','wb',32767);
for i in 1 .. 5 loop
UTL_FILE.PUT_RAW (filehandle,UTL_RAW.CAST_TO_RAW (longLine),true);
UTL_FILE.PUT_RAW (filehandle,UTL_RAW.CAST_TO_RAW (longLine),true);
UTL_FILE.PUT_RAW (filehandle,UTL_RAW.CAST_TO_RAW (longLine),true);
UTL_FILE.PUT_RAW (filehandle,UTL_RAW.CAST_TO_RAW (newline),true);
end loop;
UTL_FILE.FCLOSE(filehandle);
end;
/
在' wb'中打开文件写字节模式。接下来将raw写入文件和行尾char。
答案 2 :(得分:0)
是的,有一种方法 - 使用clob
数据类型而不是varchar2
。 clob
maximum size in PL/SQL是128TB。
在PL / SQL代码中,首先将数据收集到temporary clob。第二次以块的形式迭代clob并将其提供给utl_file
。
下面是一个随机的互联网代码段,它将任意clob写入用户定义的文件:
procedure save (
p_text in clob,
p_path in varchar2,
p_filename in varchar2
) as
v_lob_temp blob;
begin
--
-- exit if any parameter is null
--
if p_text is null
or p_path is null
or p_filename is null then
return;
end if;
--
-- convert a clob to a blob
--
declare
v_dest_offset pls_integer := 1;
v_src_offset pls_integer := 1;
v_lang_context pls_integer := dbms_lob.default_lang_ctx;
v_warning pls_integer := dbms_lob.no_warning;
begin
dbms_lob.createtemporary(lob_loc => v_lob_temp,
cache => true,
dur => dbms_lob.call);
dbms_lob.converttoblob(dest_lob => v_lob_temp,
src_clob => p_text,
amount => dbms_lob.lobmaxsize,
dest_offset => v_dest_offset,
src_offset => v_src_offset,
blob_csid => dbms_lob.default_csid,
lang_context => v_lang_context,
warning => v_warning);
-- TODO raise (what?) when warning
end;
--
-- write a blob to a file
--
declare
v_lob_len pls_integer;
v_fh utl_file.file_type;
v_pos pls_integer := 1;
v_buffer raw(32767);
v_amount pls_integer := 32767;
begin
v_fh := utl_file.fopen(p_path, p_filename, 'wb', 32767);
v_lob_len := dbms_lob.getlength(v_lob_temp);
while v_pos < v_lob_len loop
dbms_lob.read(v_lob_temp, v_amount, v_pos, v_buffer);
utl_file.put_raw(file => v_fh,
buffer =>v_buffer,
autoflush => false);
v_pos := v_pos + v_amount;
end loop;
utl_file.fclose(v_fh);
dbms_lob.freetemporary(v_lob_temp);
end;
end;