ociuldr/syduldr

就先写中文文档吧，转成英文的话，现在没那份精力。

这个工具是一个oracle数据库数据导出工具，很古老，源代码是05年的，原始源代码的发布站anysql似乎已经跪了，反正打不开。

最近实习工作的内容就是处理这个，先能正常运行，然后做一些功能定制，文档工作会陆续来完成。

ociuldr.c在oracle11的环境下运行时错误，tbuldr.c报了一个sql执行的错误，现在以tbuldr为基础进行修改，命名为syduldr。

• 2017-08-14 Create project. version 0.1
• 2017-08-15 Kill the firt bug. version 0.2
• 2017-08-17 Add two options: null and escape(escape need more tests) version 0.3
• 2017-08-24 Final version version 0.4

escape选项的代码能够处理标准形式的C语言字符串，但是在oracle下的表现令我困惑，我还需要更多的测试来确定这个功能是否完成。

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目录结构

old：原始源码

sh：一些脚本

sql：sql脚本

syduldr: 新的源代码

test：一些测试代码

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需要oracle(建议是11以上)环境，并配置好$ORACLE_HOME

export ORACLE_HOME=/u01/app/oracle/11.2.0/db_1
export LD_LIBRARY_PATH=${ORACLE_HOME}/lib:$LD_LIBRARY_PATH

编译

cd syduldr
make

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----------------------------------------------------------------------------
- syduldr: Release 0.3 (ociuldr)
- First issued by Lou Fangxin (@) Copyright 2004/2008, all rights reserved.
- Modified by Syd [https://github.com/sydnever].
----------------------------------------------------------------------------
Usage: SYDULDR keyword=value [,keyword=value,...]
Valid Keywords:
    user     = username/password@tnsname
    query    = select statement, can simply speicify a table name
    sql      = SQL file name
    field    = seperator string between fields
    record   = seperator string between records
    enclose  = fields enclose string
    escape   = escape character for special characters 
    null     = replace null with given value 
    file     = output file name, default: uldrdata.txt
    head     = print row header(Yes|No,ON|OFF,1|0)
    read     = set DB_FILE_MULTIBLOCK_READ_COUNT at session level
    sort     = set SORT_AREA_SIZE at session level (UNIT:MB) 
    hash     = set HASH_AREA_SIZE at session level (UNIT:MB) 
    serial   = set _serial_direct_read to TRUE if 1 at session level
    trace    = set event 10046 to given level at session level
    table    = table name in the sqlldr control file
    mode     = sqlldr option, INSERT or APPEND or REPLACE or TRUNCATE 
    log      = log file name, prefix with + to append mode
    long     = maximum long field size, default 8192 max 65534
    array    = array fetch size, default 50
    buffer   = sqlldr READSIZE and BINDSIZE, default 16 (MB)
    feedback = display progress every x rows, default 500000
    form     = display rows as form (Yes|No)
    fixlen   = fix length format (Yes|No)

for field, record and enclose, use '0x' to specify hex character code
\r=0x0d \n=0x0a |=0x7c ,=0x2c \t=0x09  (more: man ascii)

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