oracle 使用 UTL_FILE 导出表数据到txt文件

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环境：
Red Hat Enterprise Linux Server release 6.6
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production


--创建目录
create or replace directory TXT_DIR as '/opt/oracle/database/exptxt';
grant read,write on directory TXT_DIR to manager_desk;

--编写存储过程，并存入文件/home/oracle/detail.sql
create or replace PROCEDURE appdetail
is
file_handle utl_file.file_type;
Write_content VARCHAR2(5000);
v_DETAILID        NUMBER;
v_APPID           NUMBER;
v_APPVER          NUMBER;
v_APPVERNAME      VARCHAR2(254);
v_PACKAGENAME     VARCHAR2(254);
v_CRC32           VARCHAR2(20);
v_ICON            VARCHAR2(254);
v_DESCRIPTION     CLOB;
v_CSIZE           NUMBER;
v_PAYTYPE         NUMBER;
v_COST            NUMBER(25,3);
v_STATE           NUMBER;
v_CREATORID       NUMBER;
v_MODDATE         DATE;
v_APPPATH         VARCHAR2(500);
v_ISDEF           NUMBER;
v_DOWNLOADCOUNT   NUMBER;
v_COOPERATIONID   NUMBER;
v_REALAPPID       NUMBER(38);
v_CREATEDATE      DATE;
v_ISADVERTISER    NUMBER(38);
v_EDITOR          NUMBER;
v_ISGETDATA       NUMBER;
v_SECURITYSTATUS  NUMBER;
v_ADTYPES         NUMBER;
v_PERMISSIONLEVEL NUMBER;
v_VERIFIED        NUMBER;
v_BOTTOMDESC      VARCHAR2(512);
v_SIGNATUREMD5    VARCHAR2(64);
v_APKMD5          VARCHAR2(64);
v_MINVERSIONCODE  NUMBER(38);
v_PCLASSID        NUMBER(38);
v_CLASSID         NUMBER(38);
cursor cur_sp_out
is
select detailid, appid, appver, appvername, packagename, crc32, icon, description, csize, paytype, cost, state, creatorid, moddate, apppath, isdef, downloadcount, cooperationid, realappid, createdate, isadvertiser, editor, isgetdata, securitystatus, adtypes, permissionlevel, verified, bottomdesc, signaturemd5, apkmd5, minversioncode, pclassid, classid from applljkll;
begin
open cur_sp_out;
loop
    fetch cur_sp_out into v_detailid, v_appid, v_appver, v_appvername, v_packagename, v_crc32, v_icon, v_description, v_csize, v_paytype, v_cost, v_state, v_creatorid, v_moddate, v_apppath, v_isdef, v_downloadcount, v_cooperationid, v_realappid, v_createdate, v_isadvertiser, v_editor, v_isgetdata, v_securitystatus, v_adtypes, v_permissionlevel, v_verified, v_bottomdesc, v_signaturemd5, v_apkmd5, v_minversioncode, v_pclassid, v_classid;
    exit when cur_sp_out%notfound;
    file_handle := utl_file.fopen('TXT_DIR','applljkll.txt','a',32000);
    --specified  directories ,file_name and max_linesize
write_content := v_detailid||', '||v_appid||', '||v_appver||', '||v_appvername||', '||v_packagename||', '||v_crc32||', '||v_icon||', '||v_description||', '||v_csize||', '||v_paytype||', '||v_cost||', '||v_state||', '||v_creatorid||', '||v_moddate||', '||v_apppath||', '||v_isdef||', '||v_downloadcount||', '||v_cooperationid||', '||v_realappid||', '||v_createdate||', '||v_isadvertiser||', '||v_editor||', '||v_isgetdata||', '||v_securitystatus||', '||v_adtypes||', '||v_permissionlevel||', '||v_verified||', '||v_bottomdesc||', '||v_signaturemd5||', '||v_apkmd5||', '||v_minversioncode||', '||v_pclassid||', '||v_classid;
    --write file
    IF utl_file.is_open(file_handle) THEN
     utl_file.put_line(file_handle,write_content);
    END IF;
    --close file
    utl_file.fclose(file_handle);
    end loop;
    close cur_sp_out;
end;
/

执行：
SQL>  @/home/oracle/base.sql

Procedure created.


SQL> exec appdetail;

PL/SQL procedure successfully completed.

处错：

SQL> exec appbase
BEGIN appbase; END;

*
ERROR at line 1:
ORA-29285: file write error
ORA-06512: at "SYS.UTL_FILE", line 77
ORA-06512: at "SYS.UTL_FILE", line 690
ORA-06512: at "MANAGER_DESK.APPBASE", line 55
ORA-06512: at line 1
解决：
修改
max_linesize 为 3200;file_handle := utl_file.fopen('TXT_DIR','qn_desktop_appdetail.txt','a',32000);

注：如果不知道max_linesize，其默认值为1024；

utl_file 子过程 fopen语法：

Syntax

UTL_FILE.FOPEN (   location     IN VARCHAR2,   filename     IN VARCHAR2,   open_mode    IN VARCHAR2,   max_linesize IN BINARY_INTEGER)   RETURN file_type;